WO2004004163A1 - Mobile station apparatus and amplitude reference decision method - Google Patents

Abstract

A mobile station apparatus performs demapping for a packet channel signal by using a predetermined threshold value (amplitude reference). An amplitude estimation unit (14) decides the amplitude reference for performing demapping by using a signal of an individual pilot channel which is a transmission power control object channel and power distribution to respective channels given by an upper node layer signaling.

Description

 Description Mobile station equipment and amplitude reference determination method

 The present invention relates to a mobile station apparatus used in a cellular type mobile communication system, for example, W-CDMA (wideband-Code Division Multiple Access), and more particularly to a mobile station apparatus using multi-level modulation. It relates to the method of determining the amplitude reference in. Background art

 FIG. 10 is a diagram showing an example of a configuration of a cellular mobile communication system, in which 101 is a base station, and 102, 103,... Are mobile stations. In this system, channel transmission is performed by a downlink from the base station 101 to the mobile stations 102 and 103 and an uplink from the mobile stations 102 and 103 to the base station 101. Further, in the cellular mobile communication system, a cell is constituted by a pilot channel from the base station 101, and such cells are formed without any gap and overlapping. Although not shown, the base stations are connected to a wireless network center by wire, and the wireless network center is connected to a public network.

FIG. 11 is a diagram showing a channel between a base station and a mobile station, for example, described in the document “3GPP TS 25.21 1 V5.0.0”. As shown in the figure, the downlink channel from the base station 101 to the mobile station 102 includes a common pilot channel, a dedicated pilot channel, a common control channel, and a packet channel, and the uplink from the mobile station 102 to the base station 101. As a channel, there is a feedback channel. Although other channels actually exist, only the portions related to the present invention are extracted here. FIG. 12 is a diagram showing channel power distribution of base station 101. In the channel of base station 101, when the total power of base station 1◦1 is defined as I or, the power distribution of the common pilot channel (CP I CH: Common Pilot Channel) is “CP I CH—E c (power)”. / I or, and the power distribution of the dedicated pilot channel (DP I LOT: Dedicated Pilot) is “DP I LOT—E c” / lor, and the common control channel (HS—SCCH: Shared Control Channel for HS-DSCH) The power distribution is “: HS—SCCH—E cj / lor, and the power distribution of the bucket channel (HS-DS CH: High Speed Downlink Shared Channel) is“ HS—DS CH-E c ”.

 FIG. 13 is a diagram showing a physical channel configuration of a common pilot channel. In the common pilot channel, one slot is composed of all A symbols. Here, for example, it is composed of 10 symbols. One slot is one unit of a physical channel. For example, in the case of a chip rate of 3.84 Mcps, one slot is 2560 chhip, and its length is 0.67 ms. One symbol is a unit in which the in-phase axis component and the quadrature axis component are put together, and corresponds to, for example, the cycle of a channelization code. Therefore, the common pilot channel is 1 symbol = 256 chip. In addition, since the symbol of this common pilot channel is A == 1 + j, both the in-phase axis component and the quadrature axis component become +1 fixed data. In addition, this common pilot channel continuously transmits the above symbol to all cells.

 FIG. 14 is a diagram showing a physical channel configuration of a dedicated pilot channel. An individual pilot channel consists of a 1-slot power TPC field, a Data field, and a Pi1ot field. Then, the number of symbols varies according to the amount of data to be transmitted, and can take different formats. Uplink transmission power control commands are set in TPC, data such as voice and information are set in Data, and individual pilot symbols are set in Pi1ot.

Also, Pilot has different symposiums from S lot # 0 to S lot # l4. Set the pattern. FIG. 15 is a diagram showing a symbol pattern of P i 10t. Here, the pilot symbol of one slot is represented by two symbols, and the slot is identified by S lot # 0 to S lot # l4. The first bit of each symbol corresponds to the in-phase component, and the second bit corresponds to the quadrature component. In this case, {0, 1} → {+, one}.

 In addition, since a packet channel uses multilevel modulation, an amplitude reference is required. Conventionally, since the common pilot channel is used, the power of the common pilot channel is measured. Then, this measurement result is used as a threshold value of the multi-level modulation of the bucket channel. Here, the fact that the power distribution "HS-DSCH-Ec" of the packet channel is 1 or the fixed power distribution "CPICH-Ec" / \ or of the common pilot channel is used.

 However, in the conventional mobile station using the channel described in the above-mentioned literature, since the amplitude reference is obtained using only the common pilot channel, specifically, at the cell boundary, the When the distance is long, there is a problem that the quality deteriorates.

 The present invention has been made in view of the above, and an object of the present invention is to provide a mobile station apparatus that obtains an amplitude reference using a dedicated pilot and an amplitude reference determination method. Disclosure of the invention

 The mobile station apparatus according to the present invention includes: demapping means for performing demapping processing on a signal of a packet channel using a predetermined threshold value (amplitude reference). Individual pilot amplitude reference determining means for determining the amplitude reference for performing demapping processing by using the signal of the dedicated pilot channel which is the target channel of the above and the power distribution of each channel given by higher layer signaling. , Are provided.

According to the present invention, amplitude estimation corresponding to multi-level modulation is performed, and transmission power control is performed. Since the amplitude reference is obtained by using an individual pilot channel, the quality can be prevented from deteriorating even at the cell boundary.

 In the mobile station device according to the next invention, since the dedicated pilot channel is a channel to which transmission power control is applied, the time when power is measured and the time when power is allocated to the given dedicated pilot channel The feature is to match with.

 According to the present invention, the time at which power is measured and the time at which power is allocated to the dedicated pilot channel are made to coincide with each other, so that power distribution signaling processing can be more appropriately realized.

 The mobile station apparatus according to the next invention further comprises: SIR estimating means for estimating a signal power to interference power ratio (SIR) using the signal of the dedicated pilot channel; TPC command generation means for generating a transmission power control (TPC) command based on the target SIR, wherein the dedicated pilot amplitude criterion determination means is configured to determine the power of the given dedicated pilot channel at a given time. , The amplitude reference is interpolated in the TPC command cycle. According to the present invention, the amplitude estimation process uses the downlink TPC command, and the amplitude reference is interpolated in the TPC command cycle, so that more accurate amplitude estimation process can be realized.

 The mobile station apparatus according to the next invention further comprises: common pilot amplitude reference determining means for determining the amplitude reference for performing the demapping process using a signal of a power-fixed common pilot channel; And comparing means for selecting one of the two amplitude references in accordance with the distance to the station device.

According to the present invention, the amplitude reference estimated using the dedicated pilot channel and the amplitude reference estimated using the common pilot channel are selected in accordance with the distance between the base station apparatus and the mobile station apparatus. A simple amplitude estimation process can be realized. In the mobile station apparatus according to the next invention, since the dedicated pilot channel is a channel to which transmission power control is applied, the time when power is measured and the power distribution of the given dedicated pilot channel are allocated. The feature is to match the time with the time.

 According to the present invention, since the time at which the power is measured and the time at which the power is allocated to the dedicated pilot channel are made to coincide with each other, it is possible to more appropriately perform the power allocation signaling process.

 The mobile station apparatus according to the next invention is characterized in that the selection processing has hysteresis.

 According to the present invention, since the amplitude reference selection process is configured to have hysteresis, the switching frequency can be reduced.

 The mobile station apparatus according to the next invention further comprises: SIR estimating means for estimating a signal power to interference power ratio (SIR) using the signal of the dedicated pilot channel; TPC command generation means for generating a transmission power control (TPC) command based on the target SIR, wherein the dedicated pilot amplitude criterion determination means is configured to determine the power of the given dedicated pilot channel at a given time. , The amplitude reference is interpolated in the TPC command cycle. According to the present invention, in addition to the configuration in which the amplitude reference estimated using the dedicated pilot channel and the amplitude reference estimated using the common pilot channel are selected according to the distance between the base station apparatus and the mobile station apparatus, In addition, since a configuration is used in which a downlink TPC command is used in the amplitude estimation process and a process of interpolating the amplitude reference in the TPC command cycle is added, more accurate amplitude estimation processing can be realized.

 The mobile station apparatus according to the next invention is characterized in that the selection processing has hysteresis.

 According to the present invention, since the amplitude reference selection process is configured to have hysteresis, the switching frequency can be reduced.

In the mobile station apparatus according to the next invention, the individual pilot of the neighboring cell is further provided. A dedicated pilot amplitude reference determining means, using a signal of a dedicated pilot channel after combining, and a power distribution of each of the channels. It is specially to determine the amplitude reference for performing the demapping process.

 According to the present invention, since diversity combining is performed by adding dedicated pilot channels of neighboring cells, and an amplitude reference is obtained based on the dedicated pilot channel after diversity combining, the amplitude reference signal obtained using the dedicated pilot channel is used. The temperature can be greatly improved.

 In the amplitude reference determining method according to the next invention, demapping is performed by using a signal of a dedicated pilot channel which is a target channel for transmission power control and power distribution of each channel given by higher layer signaling. An individual pilot amplitude reference determination step of determining an amplitude reference for performing the processing.

 According to the present invention, amplitude estimation corresponding to multi-level modulation is performed, and an amplitude reference is obtained using an individual pilot channel for which transmission power control is performed, so that quality degradation is prevented even at a cell boundary. it can.

 In the amplitude reference determining method according to the next invention, there is provided an SIR estimating step of estimating a signal power to interference power ratio (SIR) using a signal of a dedicated pilot channel which is a target channel for transmission power control; A TPC command generation step for generating a transmission power control (TPC) command based on the SIR and a pre-defined target SIR; the dedicated pilot channel signal; and a bucket channel power allocation and power provided by higher layer signaling. And a dedicated pilot amplitude reference determining step of determining an amplitude reference for performing de-mashing processing by using the TPC command and the TPC command. And

According to the present invention, the amplitude estimation process uses a downlink TPC command, and the amplitude reference is interpolated in the TPC command cycle, so that a more accurate amplitude estimation process can be realized. Monkey

 In the amplitude criterion determination method according to the next invention, a signal of an individual pilot channel, which is a target channel for transmission power control, and a power distribution of each channel given by higher layer signaling are used for data decoding. An individual pilot amplitude reference determination step for determining an amplitude reference for performing mapping processing, and a common pilot amplitude for determining an amplitude reference for performing demapping processing using a signal of a common power channel with fixed power. A criterion determining step; and a comparing / selecting step of selecting one of the two amplitude references according to a distance from the base station apparatus.

 According to the present invention, the amplitude reference estimated using the dedicated pilot channel and the amplitude reference estimated using the common pilot channel are selected according to the distance between the base station apparatus and the mobile station apparatus. In the amplitude criterion determination method according to the next invention, an accurate twist width estimation process can be realized. The signal power-to-interference power ratio (SIR) is determined by using the signal of the individual pilot channel that is the target channel of the transmission power control. An SIR estimation step of estimating a transmission power control (TPC) command based on the estimated SIR and a predetermined target SIR; a signal of the dedicated pilot channel; The power distribution of the bucket channel given by the ring and the power distribution of the individual pilot channel at the time when the power was measured And an individual pilot amplitude reference determining step of determining an amplitude reference for performing demapping processing using the TPC command, and a demapping process using a signal of a power-fixed common pilot channel. A common pilot amplitude reference determining step of determining an amplitude reference for performing the comparison, a comparing / selecting step of selecting one of the two amplitude references according to a distance from the base station apparatus, It is characterized by including.

According to the present invention, according to the distance between the base station apparatus and the mobile station apparatus, estimation is performed using the amplitude reference and the common pilot channel estimated using the dedicated pilot channel. Because the amplitude reference was selected, the downlink TPC command was used for the amplitude estimation process, and the process of interpolating the amplitude reference in the TPC command cycle was added.

Further, more accurate amplitude estimation processing can be realized.

 'In the amplitude reference determining method according to the next invention, since the dedicated pilot channel is a channel to which transmission power control is applied, the time when power is measured and the dedicated pilot channel given above are determined. It is a special feature to make the time of power distribution coincide with. '

 According to the present invention, the time at which power is measured and the time at which power is allocated to the dedicated pilot channel are made to coincide with each other, so that power distribution signaling processing can be more appropriately realized.

 The amplitude reference determining method according to the next invention further includes a combining step of performing diversity combining by adding an individual pilot channel of a neighboring cell, wherein the individual pilot amplitude reference determining step includes: It is characterized by the use of individual pipe channels.

 According to the present invention, since the diversity reference is performed by adding the dedicated pilot channel of the neighboring cell and the amplitude reference is determined based on the dedicated pilot channel after the dipersity combining, the amplitude reference signal determined using the dedicated pilot channel is determined. The reliability can be greatly improved. Brief description of the drawings

FIG. 1 is a diagram illustrating a configuration of a mobile station device according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a demapping process in a demapping unit. FIG. FIG. 4 is a diagram illustrating a demapping process in a unit, FIG. 4 is a diagram illustrating a configuration of a mobile station device according to a second embodiment of the present invention, and FIG. 5 is a diagram illustrating an implementation of the mobile station device according to the present invention. FIG. 6 is a diagram showing a configuration of Embodiment 3, FIG. 6 is a diagram showing an example of a criterion for determining which channel uses an estimated value, and FIG. 7 is a diagram showing a movement according to the present invention. FIG. 8 is a diagram showing a configuration of a fourth embodiment of a station device, and FIG. FIG. 9 is a diagram showing a state of receiving power distribution of a dedicated pilot channel using CFN synchronization. FIG. 9 is a diagram showing a configuration of a mobile station device according to a sixth embodiment of the present invention. FIG. 0 is a diagram showing an example of a configuration of a cellular mobile communication system. FIG. 11 is a diagram showing a base station described in the document “3GPPTS 25.211 V5.0.OJ”. FIG. 12 is a diagram showing a channel between a station and a mobile station. FIG. 12 is a diagram showing power distribution of channels of a base station. FIG. 13 is a diagram showing a physical channel configuration of a common pilot channel. Fig. 14 is a diagram showing a physical channel configuration of a dedicated pilot channel, and Fig. 15 is a diagram showing a symbol pattern of Pi1 ot. Form

In order to explain the present invention in more detail, this will be described with reference to the accompanying drawings. First, the configuration of the mobile station device according to the present invention will be described. FIG. 1 is a diagram showing a configuration of a mobile station device according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a channel coding unit that performs processing for putting a transport block into the air format, 2 denotes a spread modulation unit that spreads a signal after channel coding, and 3 denotes a spread modulation unit. A D / A converter (D / A) that converts the subsequent signal into an analog baseband signal, 4 is a filter (FIL) that performs waveform shaping, and 5 is a frequency converter that performs predetermined frequency conversion ( U / C), 6 is an HPA that performs signal amplification, 7 is an antenna, 8 is an LNA that performs low-noise amplification, and 9 is a frequency converter (D / C), 10 is a filter that removes noise, 11 is an AZD converter (AZD) that converts the analog signal after noise removal into a digital signal, and 1 2 and 1 3 are the filters after AZD conversion. Is a despreading unit that despreads the signal of An amplitude estimator for obtaining a threshold for demapping based on the level measurement result, 15 is a phase estimator for obtaining a phase rotation amount using a known signal, and 16 is a phase estimator for obtaining the phase rotation. A phase compensating unit for compensating the phase by using the amount, and 17 performs a demapping process using the threshold value. ぅ Demapping section, 18 is a channel decoding section that performs processing for outputting a transport block.

 Here, the operation of the mobile station apparatus according to Embodiment 1 configured as described above will be described. First, data such as user information is supplied to the channel coding unit 1 as a transport block. The channel coding unit 1 performs a process for inserting the transport block into the air format. Specifically, it performs processing such as addition of CRC (Cyclic Redundancy Check), convolutional coding, rate matching, interleaving, physical channeling, and so on.

 Spreading modulator 2 spreads the signal after channel coding with a predetermined code. In DZA 3, the signal after spread modulation is converted to an analog baseband signal. In FIL4, waveform shaping is performed on the analog baseband signal. U / C 5 converts the signal after waveform shaping into a radio frequency. Then, the HPA 6 performs signal amplification processing on the signal converted to the radio frequency, and the amplified signal is transmitted from the antenna 7 to the base station as an uplink signal.

 On the other hand, the downlink signal from the base station is received by the antenna 7, and the LNA 8 performs a low noise amplification process on the received signal. DZC 9 performs frequency conversion from radio frequencies to baseband signals. In FIL10, noise removal processing of the signal after frequency conversion is performed. Then, the A / D 11 converts the analog baseband signal from which noise has been removed into a digital signal.

 Since the signal after A / D conversion is a code-multiplexed signal, the despreading units 12 and 13 perform despreading processing on the signal after AZD conversion to obtain a signal of a desired channel. Is extracted. The despreading unit 12 extracts the signal of the dedicated pilot channel by despreading and supplies the signal to the amplitude estimating unit 14 and the phase estimating unit 15 .The despreading unit 13 despreads the packet by despreading. The signal of the channel is extracted and the signal is supplied to the phase compensator 16.

The amplitude estimator 14 measures the signal power of the despread dedicated pilot channel, and determines a threshold (amplitude reference) for 16QAM demapping based on the measurement result. Find the values needed to determine 2 and 3 are views showing a demapping process in a demapping unit 17 described later. In order to extract the original 4-bit signal by demapping, threshold values A, B, C, D, E, and F are required as shown in FIG. For example, if the DC offset of the signal is 0, the threshold value E is Q-0, the threshold value B is I = 0, the threshold value F is Q = + th, and the threshold value D is Q = — Th, threshold A is 1 = one th, threshold C is I = th. Therefore, if the value th is obtained, demapping can be performed.

 When the normalized power of the signal is X, the amplitude estimating unit 14 obtains the above value th based on the equation (Γ). th ^^ = * X ■■ · (1)

 Vio

Here, would determine the threshold A, C, D, F by substituting P _HS _ _DSCH determined using the following equation (2) in X.

_PF Λ n ₍ ^ HS ~ DSCH-EclIor,.

 DPILOT—Ec! Iori ^)

However, P _HS - in _DSCH (Te _k) is Tokiirite _{k (k = l, 2,} 3, ■■ ·, N) represents a packet channel power in, P _{DPILOT (k} Te) is Te time _k “HS—DSCH—E c” / I or represents the power distribution of the packet channel, and “DP I LOT—E c” / I or (te _k ) at time i: _k Represents the power distribution of dedicated pilot channels. As an example, the power distribution “HS—D SCH—E c” is fixed at 50%, the power distribution FDP I LOT—E cJ / Zl or (te _k ) is made 5% variable, and the individual pilot channel at time _k measurements directly obtained P _HS _ _DSCH (τ J from. dedicated for pilot channel is a channel in which the power control is applied, the power distribution with the given time tau _k of the measurement of the power "DPI LOT-E cj / In the present embodiment, for example, power distribution “DP I LOT—E c” / I or and time information τ _k are transmitted by higher layer signaling. The amplitude estimation unit 14 supplies the value th obtained as described above to the demapping unit 17.

 Further, the phase estimating unit 15 obtains the amount of phase rotation using the individual pilot signal portion after despreading and the known signal. Since the downlink signal is multiplexed with the dedicated pilot channel and the bucket channel, the phase rotation of the individual pilot signal is equal to the phase rotation of the packet channel. Therefore, the amount of phase rotation can be estimated as described above.

 The phase compensator 16 receiving the signal of the despread packet channel uses the phase rotation amount e X p (j Θ) estimated by the phase estimator 15 to process the received signal. Multiply by the complex conjugate e X ρ (-} Θ). This makes it possible to compensate for the phase rotation added in the transmission RF portion, the space, and the reception RF portion.

The demapping unit 17 converts the signal after phase compensation into the original 4-bit signal based on the i and q signals shown in FIG. Specifically, the demapping section 17 performs 16QAM demapping processing using the value th of the output of the amplitude estimating section 14 to convert the demapping input symbol data (IQ signal) into 4-bit data (the (Corresponds to b (n) in Fig. 3). Actually, it is output as N-bit soft-decision data instead of 1-bit hard-decision data (because the coding gain can be maximized). The channel decoding unit 18 performs physical channel demapping, interleaving, rate dematching, decoding, CRC check, etc., and as a result, transport blocks are supplied to the upper layer. The upper layer provides services to the user, such as outputting web information to the screen. Here, the packet channel is described as one code, but a multi-code may be used. Also, the combination of each despreading unit, phase compensation unit, and demapping unit is described as one. However, the present invention is not limited to this. Good. Also, it may be combined with the reception di-parity, MIMO (Multiple Input Multiple Output), and interference canceller. As described above, in the present embodiment, the amplitude estimation corresponding to the multi-level modulation is performed, and the amplitude reference is obtained using the individual pilot channel for which the transmission power control is performed. Can be prevented from decreasing.

 Next, in the second embodiment, in addition to the operation of the first embodiment described above, an uplink TPC (transmission power control) command is used to interpolate information in the amplitude estimator. .

 FIG. 4 is a diagram showing a configuration of a mobile station apparatus according to Embodiment 2 of the present invention. In FIG. 4, reference numeral 14a denotes an amplitude estimating unit for obtaining a demapping threshold value by a method different from that of the first embodiment, and a physical channel mapping unit for mapping 2 UiTPC (transmission power control) commands. Yes, 22 is an SIR estimator that estimates the signal power to interference power ratio (SIR), 23 is a command generator that generates TPC commands, 24 is an adder, and 25 is a determiner . Note that the same components as those of the first embodiment described above are denoted by the same reference numerals and description thereof will be omitted. Here, only the operation different from the first embodiment will be described.

 In the present embodiment, downlink transmission power control of an individual pilot channel is made possible by adding an SIR estimation unit 22, a command generation unit 23, and a physical channel mapping unit 21. Then, the output of the command generation unit 23 is input to the amplitude estimation unit 14a.

First, the despreading unit 12 supplies the dedicated pilot channel signal after despreading to the amplitude estimating unit 14a, the phase estimating unit 15, and the SIR estimating unit 22. The SIR estimator 22 estimates the SIR based on the despread dedicated pilot channel signal. Estimation of SIR can be realized by a well-known estimation method in which S (Signal) is an average value of signal power and I (Interference) is a standard deviation of signal power. The output SIR _EST of the SIR estimator ₂₂ is supplied to the command generator 23.

The command generating unit 23, an adder 24, by using the SIR _{ta rge t} is SIR _est and SIR target value of the SIR estimator 22 outputs, SIR _est - SIR _ta the _{r ge t} to calculate. Judgment device 25 force Judges the calculation result and outputs TPC command I do. The physical channel mapping unit 21 maps the received TPC command.

The amplitude estimating unit 14a obtains the above value th based on the equation (1) as described above, but here, the _PHS to _DSCH obtained using the following equation (3) are substituted into X. Find the values A, C, D, and F (see Fig. 2).

 H P /, * HS-DSCH-Ecor *,.

FHS- DSC V k)-PDPILOT k) *> TP i

 DPILOT-Ec / Ior (k)

 Note that ∑TPCi represents accumulation of TPC commands output from the command generation unit 23. In this case, first, the time at which the power distribution “DP IL〇T—E cj / I or was transmitted is set to i = 0, and then i is updated in units of one slot (TPC command cycle). At the time of the next power distribution “DP I LOT—E cj / \ or”, this accumulation is returned to 0.

 As described above, in the present embodiment, the downlink TPC command is used for the amplitude estimation processing, and the information in the amplitude estimation unit is interpolated in the TPC command cycle, so that more accurate amplitude estimation processing can be realized.

 Next, in the third embodiment, the amplitude reference is obtained by using the dedicated pilot channel or the common channel.

 FIG. 5 is a diagram showing a configuration of a mobile station apparatus according to Embodiment 3 of the present invention. In FIG. 5, 31 is a despreading unit, 32 is an amplitude estimating unit, 33 is a phase compensating unit, 34 is a comparing unit, and 35 and 36 are selecting units. Note that the same components as those of the first embodiment described above are denoted by the same reference numerals and description thereof will be omitted. Here, only the operation different from the first embodiment will be described.

First, since the signal after AZD conversion by AZD 11 is a code-multiplexed signal, the despreading units 12, 13, and 31 perform despreading processing on the signal after AZD conversion. Then, a signal of a desired channel is extracted. Despreading section 12 extracts the signal of the dedicated pilot channel by despreading and supplies the signal to amplitude estimating section 14 and phase estimating section 15, and despreading section 13 despreads by despreading. Bucket channel And supplies the signal to the phase compensator 16. Then, despreading section 31 extracts a signal of the common pilot channel by despreading and supplies the signal to amplitude estimating section 32 and phase estimating section 33.

 In the amplitude estimator 32, a value necessary for determining the threshold value of the 16QAM demapping is determined by a known method similar to the conventional method, that is, using the common pilot channel after despreading. . Also, the phase estimating unit 33 obtains the phase rotation amount by a known method, that is, by using the common pilot signal portion after despreading and the known signal. The comparing section 34 compares the output of the amplitude estimating section 14 with the output of the amplitude estimating section 32, and instructs which channel to use the value estimated in the phase compensation processing / demapping processing. FIG. 6 is a diagram showing an example of a criterion for determining which channel uses the value estimated. For example, if the base station apparatus is relatively close to the mobile station apparatus, the mobile station apparatus is instructed to use the value estimated by the power-fixed common pilot channel, and if the mobile station apparatus is near the cell boundary, transmission power control is performed. Instructs to use the value estimated by the individual pilot channel performed.

 Then, the selection units 35 and 36 select and output the estimated value of any one channel according to the instruction from the comparison unit 34.

 As described above, in the present embodiment, the amplitude reference estimated using the dedicated pilot channel and the amplitude reference estimated using the common pilot channel are selected according to the distance between the base station apparatus and the mobile station apparatus. Configuration. As a result, more accurate amplitude estimation processing can be realized.

 Although the switching process of each selection unit in the present embodiment is performed according to the magnitude of the power level, for example, the switching process may be provided with hysteresis to reduce the switching frequency. As an example of an implementation method, for example, before the comparison processing, a margin α is subtracted from the output of one amplitude estimator that is not currently selected. As a result, the output of one amplitude estimator that is not currently selected will be selected only when it is larger than the other by the amount of ma: α.

Next, in the fourth embodiment, in addition to the operation of the third embodiment described above, In order to interpolate the information in the amplitude estimator, an uplink TPC (transmission power control) command is used.

 FIG. 7 is a diagram showing a configuration of a mobile station apparatus according to Embodiment 4 of the present invention. The same components as those in the first, second, and third embodiments described above are denoted by the same reference numerals, and description thereof is omitted. Here, only operations different from those in the third embodiment will be described.

First, the despreading unit 12 supplies the signal of the despread dedicated pilot channel to the amplitude estimating unit 14a, the phase estimating unit 15, and the SIR estimating unit 22. The SIR estimator 22 estimates the SIR based on the despread dedicated pilot channel signal. Estimation of SIR can be realized by a well-known estimation method in which S (Signal) is an average value of signal power and I (Interference) is a standard deviation of signal power. The output SIR _EST of the SIR estimator ₂₂ is supplied to the command generator 23.

The command generating unit 23, by using the SIR _{Targe t} is SIR _est and SIR target value of the adder 24 force SIR estimator 22 outputs, SIR _{es t} - a is calculated SIR _{ta rge t.} Then, the judgment unit 25 judges the calculation result and outputs a TPC command. The physical channel mapping unit 21 maps the received TPC command. ■ The amplitude estimation unit 14 a, the same manner as described above, by substituting (1) obtaining a value th based on the expression, this Kodewa, the P _HS _ _DSCH determined using the above equation (3) to X sill Find the values A, C, D, and F (see Fig. 2). In this case, first, the time at which the power distribution “DP IL〇T one Ec” / lor was transmitted is set to i = 0, and then i is updated in units of one slot (TPC command cycle). Then, the accumulation is returned to 0 at the time when the next power distribution “DP I LOT—E c” / I 0 r is received.

As described above, in the present embodiment, an amplitude reference estimated using an individual pilot channel and an amplitude reference estimated using a common pilot channel are selected according to the distance between the base station apparatus and the mobile station apparatus. In addition to the above configuration, a process of interpolating information in the amplitude estimating unit at a TPC command cycle using a downlink TPC command in the amplitude estimation process is further added. I decided to add it. As a result, more accurate amplitude estimation processing can be realized. As described above, in Embodiments 1 to 4, the power distribution of the dedicated pilot channel and the time at that time are notified by higher layer signaling. In the fifth embodiment, the time is obtained by CFN (Connection Frame Number) synchronization.

 For example, there is a method called “CFN switching” as a method for optimizing the switching timing between the base station device and the mobile station device. “Framme Numb e r” in C FN is a function that counts Frame (1 Oms) from 0 to: 1023. In CFN switching, the base station apparatus transmits information on the switching timing as CFN. Then, the mobile station device reflects the switching when the CFN is received. In this way, the switching timing between the base station device and the mobile station device is matched.

 FIG. 8 is a diagram showing a state of reception of the power distribution of the dedicated pilot channel using CFN synchronization, where 41 is a base station apparatus, and 42 is one of the first to fourth embodiments. It is a mobile station device provided with an amplitude estimating unit. In the present embodiment, mobile station apparatus 42 receives dedicated pilot channel power distribution by higher layer signaling. Also, the information on the time at that time is recognized by CFN synchronization. Then, based on the received information on the power distribution of the dedicated pilot channel and the time, the amplitude estimation process is performed by any one of the first to fourth embodiments.

 Thus, in the present embodiment, without using upper layer signaling,

Since the time synchronization is performed by the CFN synchronization, the power distribution signaling process can be more appropriately realized.

Next, in Embodiment 6, in addition to the dedicated pilot channel being a channel on which transmission power control is performed, a diversity pilot channel is utilized by utilizing a channel capable of performing diversity handover with a channel from another cell. The amplitude estimation processing is performed using the individual pilot channel after one-sitch synthesis. As a result, the reliability of the amplitude reference by the individual pilot can be improved. FIG. 9 is a diagram showing a configuration of a mobile station apparatus according to Embodiment 6 of the present invention. In FIG. 9, 51 and 52 are despreading parts, 53 is a combining part, and 54 is a correcting part. Note that the same components as those of the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted. Here, only operations different from those in the third embodiment will be described.

 First, the despreading units 1, 2, 1, 2 extract the individually assigned even-numbered pilot channels by despreading, and supply the despread individual pilot channel signals to the combining unit 5. I do. ·

 The combining section 53 dipersitically combines the despread dedicated pilot channel signal and supplies the combined dedicated pilot channel signal to the amplitude estimating section 14 and the phase estimating section 15.

 In this embodiment, in order to use the output of amplitude estimating section 14 as an amplitude reference, it is necessary for correcting section 54 to convert the output of amplitude estimating section 14 to its own station's amplitude value. As described above, in the present embodiment, diversity combining is performed by adding dedicated pilot channels of neighboring cells, and an amplitude reference is obtained based on the dedicated pilot channels after diversity combining. As a result, the reliability of the amplitude reference obtained by using the individual pilot channel can be greatly improved.

 The same effect can be obtained even when the configuration of the present embodiment is applied to the above-described first, second, and fourth embodiments. Further, in the present embodiment, three examples of diversity handover have been described, but the present invention is not limited thereto. Industrial applicability

 INDUSTRIAL APPLICABILITY As described above, the mobile station apparatus according to the present invention is useful for a mobile communication system in which cells are formed without any gap and overlapping each other. Are suitable.

Claims

The scope of the claims 1. A mobile station device comprising: a demapping means for performing demapping processing on a signal of a packet channel using a predetermined threshold (amplitude reference). Individual pilot amplitude reference determining means for determining the amplitude reference for performing the de-mapping process using the signal and the power distribution of each channel given by higher layer signaling,  A mobile station device comprising: 2. Since the dedicated pilot channel is a channel to which transmission power control is applied, the time at which power is measured and the time at which the given dedicated pilot channel is allocated to power are matched. The mobile station device according to claim 1. 3.  SIR estimating means for estimating a signal power to interference power ratio (SIR) using the signal of the dedicated pilot channel;  TPC command generation means for generating a transmission power control (TPC) command based on the estimated SIR and a predetermined target SIR,  With  The method according to claim 2, wherein the individual pilot amplitude reference determining means interpolates an amplitude reference in a TPC command cycle at the given time of power distribution of the individual pilot channel. Mobile station equipment. 4. Performs demapping processing using power-fixed common pilot channel signals A common pilot amplitude reference determining means for determining the amplitude reference for,  A comparison / selection unit that selects one of the two amplitude references according to a distance from the base station device;  2. The mobile station device according to claim 1, comprising: 5. Since the dedicated pilot channel is a channel to which transmission power control is applied, the time at which power is measured and the time at which the given dedicated pilot channel is allocated to power are matched. The mobile station device according to claim 4 6. The mobile station device according to claim 4, wherein the selection process has hysteresis. 7.  SIR estimating means for estimating a signal power to interference power ratio (SIR) using the signal of the dedicated pilot channel;  TPC command generating means for generating a transmission power control (TPC) command based on the estimated SIR and a predetermined target SIR,  With  6. The individual pilot amplitude reference determination means, wherein at the given time of power distribution of the individual pilot channel, an amplitude reference is interpolated in a TPC command cycle. Mobile station equipment. 8. The mobile station device according to claim 7, wherein the selection process has hysteresis. 9. Diversity synthesis is performed by adding individual pilot channels of neighboring cells. 0 synthesis means,  With  The individual pilot amplitude reference determining means determines an amplitude reference for performing a demapping process by using a signal of the individual pilot channel after synthesis and a power distribution of each channel. The mobile station device according to any one of claims 1 to 8, wherein: 10. A method for determining an amplitude reference of a mobile station device that performs demapping processing on a bucket channel signal using a predetermined threshold (amplitude reference),  A dedicated pilot channel for determining the amplitude reference for performing the de-mapping process by using the signal of the dedicated pilot channel which is the target channel of the transmission power control and the power distribution of each channel given by higher layer signaling. A method for determining an amplitude criterion, comprising: determining a cut amplitude criterion. 11. An amplitude reference determination method for a mobile station device that performs demapping processing on a packet channel signal using a predetermined threshold (amplitude reference)  An SIR estimation step of estimating a signal power-to-interference power ratio (SIR) using a signal of an individual pilot channel which is a target channel of transmission power control;  A TPC command generating step of generating a transmission power control (TPC) command based on the estimated SIR and a predetermined target SIR, A demapping process is performed using the dedicated pilot channel signal, the dedicated channel power allocation at the time when the power of the bucket channel given by higher layer signaling and the power are measured, and the TPC command. An individual pilot amplitude criterion determining step of determining the amplitude criterion for determining the amplitude criterion. 1 2. In an amplitude reference determination method for a mobile station apparatus that performs demapping processing on a signal of a packet channel using a predetermined threshold (amplitude reference),  A dedicated pilot channel for determining the amplitude reference for performing the de-mapping process by using the signal of the dedicated pilot channel which is the target channel of the transmission power control and the power distribution of each channel given by higher layer signaling. A common pilot amplitude reference determining step of determining the amplitude reference for performing the demapping process using a signal of a fixed power pilot channel, and a distance between the base station apparatus and the base station apparatus. A comparing / selecting step of selecting one of the two amplitude references;  A method of determining an amplitude criterion, comprising: ' 13. A method of determining the amplitude reference of a mobile station apparatus that performs demapping processing on a signal of a packet channel using a predetermined threshold value (amplitude reference).  An SIR estimation step of estimating a signal power-to-interference power ratio (SIR) using a signal of an individual pilot channel which is a target channel of transmission power control;  A TPC command generating step of generating a transmission power control (TPC) command based on the estimated SIR and a predetermined target SIR,  Demapping processing using the dedicated pilot channel signal, the dedicated channel power allocation at the time of measuring the power of the bucket channel given by higher layer signaling and the power measurement time, and the TPC command An individual pilot amplitude reference determining step for determining the amplitude reference for performing the demultiplexing process, and a common pilot amplitude determining step for determining the amplitude reference for performing the demagnetizing process using a signal of the power-fixed common pilot channel. Amplitude reference determination step, according to the distance to the base station device, a comparison step of selecting one of the two amplitude references, A method of determining an amplitude criterion, comprising: 14. Since the dedicated pilot channel is a channel to which transmission power control is applied, the time at which power is measured and the time at which power is allocated to the given dedicated pilot channel are matched. The method of determining an amplitude reference according to any one of claims 10 to 13. 15 5. In addition, a combining step of adding individual pilot channels of neighboring cells to perform dipersity combining,  Including  15. The amplitude reference determining method according to claim 14, wherein the individual pilot amplitude reference determining step uses the individual pilot channel after the combination.