JP6307284B2 - Radio circuit and radio terminal - Google Patents

Description

  The present invention relates to a radio technology, and more particularly, to a radio technology for simultaneously transmitting a plurality of radio signals in different frequency bands.

  In recent years, a wireless technology for simultaneously transmitting a plurality of wireless signals in different frequency bands has been developed. For example, in the LTE-Advanced standard, carrier aggregation is performed in which communication is performed using a plurality of signals called carrier components (CC) in order to increase communication speed (Patent Document 1 and Non-Patent Document 1).

  FIG. 7 is a diagram illustrating a typical configuration of a radio circuit that performs uplink carrier aggregation (see Non-Patent Document 1). In the radio circuit 100 shown in FIG. 7, a transmission circuit and an antenna that perform transmission signals in different frequency bands are provided in different systems (that is, for two transmission signals output from the modulation / demodulation processing unit 110). , A system including the antenna 160a, the duplexer 130a, and the power amplifier 120a, and a system including the antenna 160b, the duplexer 130b, and the power amplifier 120b are provided independently).

JP 2012-222468 A (released on November 12, 2012)

3GPP TR 36.815 v9.1.0 Technical Report

  However, a wireless terminal including the wireless circuit 100 illustrated in FIG. 7 may deteriorate communication characteristics due to a user's way of holding, a change in propagation path, or the like.

  The present invention has been made in view of the above problems, and in a radio circuit that transmits a plurality of radio signals in different frequency bands at the same time, deterioration of communication characteristics due to a user's holding method, a change in propagation path, and the like. The main purpose is to provide a technique for suppressing the problem.

  In order to solve the above problems, a radio circuit according to one embodiment of the present invention is a radio circuit that simultaneously transmits a plurality of radio signals in different frequency bands, and includes a plurality of antennas, a plurality of transmission signal amplifiers, and A connection circuit for connecting each antenna and each transmission signal amplifier in a one-to-one relationship; a modulation processing unit connected to the plurality of transmission signal amplifiers for simultaneously modulating a plurality of radio signals; and via each antenna Quality detection means for detecting the quality of the wireless communication made, and connection control means for controlling the connection relationship between each antenna and each transmission signal amplifier by the connection circuit so as to improve the quality detected by the quality detection means And.

  According to one embodiment of the present invention, in a wireless circuit that transmits a plurality of wireless signals in different frequency bands at the same time, it is possible to suppress deterioration in communication characteristics due to a user's way of holding, a propagation path change, and the like. .

It is a figure which shows schematic structure of the radio | wireless circuit which concerns on one Embodiment of this invention. It is a figure which shows schematic structure of the network system in one Embodiment of this invention. It is a figure which shows schematic structure of the radio | wireless circuit which concerns on other embodiment of this invention. It is a figure which shows schematic structure of the radio | wireless circuit which concerns on further another embodiment of this invention. It is a flowchart which shows an example of the flow of the process in one Embodiment of this invention. It is a flowchart which shows the other example of the flow of the process in one Embodiment of this invention. It is a figure which shows schematic structure of the radio | wireless circuit which concerns on a prior art.

Embodiment 1
An embodiment (Embodiment 1) of the present invention will be described below with reference to FIGS.

(Wireless circuit)
FIG. 1 is a schematic diagram illustrating a configuration of a wireless circuit 1 according to the first embodiment. Note that a power supply circuit, a matching circuit, and the like are omitted. The radio circuit 1 corresponds to LTE Advanced and is a radio circuit capable of simultaneously transmitting a plurality of radio signals in different frequency bands in order to perform carrier aggregation in the uplink. However, the present invention is not limited to a radio circuit corresponding to LTE Advanced, and can be applied to all radio circuits capable of simultaneously transmitting a plurality of radio signals in different frequency bands.

  As shown in FIG. 1, a radio circuit 1 includes a modulation / demodulation processing unit (modulation processing unit) 10, a quality detection unit (quality detection unit) 11, a switching control unit (connection control unit) 12, and a power amplifier (transmission signal). Amplifiers 20a and 20b, duplexers (circuit elements, duplexers) 30a and 30b, switches (circuit elements) 40a and 40b, diplexers (circuit elements, duplexers) 50a and 50b, and antennas 60a and 60b Are provided, and FDD (Frequency Division Duplex) communication is performed.

  A circuit portion for connecting antennas 60a and 60b and power amplifiers 20a and 20b, which is constituted by duplexers 30a and 30b, switches 40a and 40b, and diplexers 50a and 50b, may be referred to as connection circuit 13. is there. Connection circuit 13 connects antennas 60a and 60b and power amplifiers 20a and 20b in a one-to-one relationship. In addition, devices (duplexers 30a and 30b, switches 40a and 40b, and diplexers 50a and 50b) that form a connection path between the antennas 60a and 60b and the power amplifiers 20a and 20b in the connection circuit 13 may be referred to as circuit elements.

  The modulation / demodulation processing unit 10 simultaneously modulates / demodulates a plurality of radio signals. That is, the modulation / demodulation processing unit 10 simultaneously modulates a plurality of transmission signals and simultaneously demodulates a plurality of reception signals. The modulation / demodulation processing unit 10 outputs the modulated transmission signals to the power amplifiers 20a and 20b and demodulates the reception signals input from the duplexers 30a and 30b. Note that the frequency bands of the transmission signals output to the power amplifiers 20a and 20b can be different from each other.

  The quality detection unit 11 detects the quality of wireless communication performed via the antennas 60a and 60b based on the received signal input to the modulation / demodulation processing unit 10. Details of the detection method will be described later.

  The switching control unit 12 controls the connection relationship between the antennas 60 a and 60 b and the power amplifiers 20 a and 20 b by the connection circuit 13. Details of the control method will be described later.

  The power amplifier 20a amplifies the transmission signal output from the modulation / demodulation processing unit 10 and outputs the amplified signal to the connection circuit 13 (the duplexer 30a). The power amplifier 20b amplifies the transmission signal output from the modulation / demodulation processing unit 10 and outputs the amplified signal to the connection circuit 13 (the duplexer 30b).

(Connection circuit)
The duplexer 30a outputs the transmission signal input from the power amplifier 20a to the switch 40a, and outputs the reception signal input from the switch 40a to the modulation / demodulation processing unit 10. The duplexer 30b outputs the transmission signal input from the power amplifier 20b to the switch 40b and outputs the reception signal input from the switch 40b to the modulation / demodulation processing unit 10.

  The switch 40a selectively outputs the transmission signal input from the duplexer 30a to either the diplexer 50a or 50b, and outputs the reception signal input from the diplexer 50a or 50b to the duplexer 30a. The switch 40b selectively outputs the transmission signal input from the duplexer 30b to either the diplexer 50a or 50b, and outputs the reception signal input from the diplexer 50a or 50b to the duplexer 30b.

  The diplexer 50a outputs the transmission signal input from the switch 40a or the switch 40b to the antenna 60a, and outputs the reception signal input from the antenna 60a to the switch 40a or the switch 40b. The diplexer 50b outputs the transmission signal input from the switch 40a or the switch 40b to the antenna 60b, and outputs the reception signal input from the antenna 60b to the switch 40a or the switch 40b.

  The connection circuit 13 is individually connected to each of the power amplifiers 20a and 20b, and includes switches 40a and 40b that are selectively connected to any of the paths for connecting to each of the antennas 60a and 60b. . Therefore, the switching control unit 12 controls the switches 40a and 40b so that a plurality of power amplifiers are not connected to any of the paths for connecting to the antennas 60a and 60b, so that any of the circuit elements can be controlled. In contrast, it is possible to prevent a plurality of transmission signals from being supplied at the same time, thereby suppressing deterioration of transmission signal characteristics due to intermodulation distortion (for example, as shown in FIG. 1, one transmission signal includes 90a to 91a. The other transmission signal may pass the route indicated by 90b to 91b).

(Example of processing flow)
FIG. 5 is a flowchart illustrating an example of a processing flow in the first embodiment. First, the radio circuit 1 starts uplink simultaneous transmission such as carrier aggregation in uplink (in other words, simultaneous transmission of a plurality of radio signals in different frequency bands) (step S1). At this time, the frequency bands of the transmission signals output from the power amplifiers 20a and 20b are different from each other.

  Subsequently, the switching control unit 12 changes the combination of each antenna and each frequency band of the transmission signal (in other words, the connection relationship between the antennas 60a and 60b and the power amplifiers 20a and 20b), and the quality detection unit 11 The quality (communication quality) of wireless communication through each antenna is calculated (step S2).

  The switching control unit 12 controls the connection relationship between the antennas 60a and 60b and the power amplifiers 20a and 20b, and all combinations (specifically, each antenna) and each frequency band (each power amplifier) of the transmission signal. (I) a combination in which the antenna 60a and the power amplifier 20a are connected, and a combination in which the antenna 60b and the power amplifier 20b are connected, and (ii) a connection between the antenna 60a and the power amplifier 20b, and the antenna 60b and the power amplifier 20a Switch the combinations that are connected in order.

  And the quality detection part 11 calculates the total communication quality (for example, the sum total of the reception power of all the received signals) in each combination. The method by which the quality detection unit 11 calculates the communication quality is not particularly limited, and various known methods may be used as appropriate. For example, the quality detection unit 11 uses the received power of the received signal input to the modulation / demodulation processing unit 10. The measured received power may be measured as the communication quality. In that case, at least a part of the received signal is output from the modulation / demodulation processing unit 10 to the quality detection unit 11, and the quality detection unit 11 may measure the reception power of the input reception signal and calculate the communication quality. As another method, the base station that has received the transmission signal transmitted via each antenna detects the quality of the transmission signal (for example, transmission power), and transmission signal quality information indicating the quality of the detected transmission signal. May be fed back (transmitted) to the wireless terminal 80 including the wireless circuit 1. In this case, the quality detection unit 11 may calculate the communication quality by extracting the transmission signal quality information from the reception signal demodulated by the modulation / demodulation processing unit 10.

  Subsequently, in step S2, the switching control unit 12 compares the total communication quality in each combination calculated by the quality detection unit 11, and the highest total communication quality is obtained (for example, the reception power of all received signals). The combination that maximizes the sum of () is determined (step S3).

  When the combination of each antenna used at that time and each frequency band of the transmission signal is different from the combination with the highest total communication quality determined in step S3, the switching control unit 12 And the connection circuit 13 (switches 40a and 40b) are controlled so that the combination of the transmission signal and each frequency band of the transmission signal is the combination with the highest total communication quality determined in step S3 (step S4).

  Then, the switching control unit 12 determines whether or not the communication is finished (step S5), and when the communication is finished (YES in step S5), the process is completed. On the other hand, if the communication has not ended (NO in step S5), the switching control unit 12 and the quality detection unit 11 wait until a predetermined time elapses (step S6), and then return to step S2 to return each antenna. And the communication quality in all combinations of the frequency bands of the transmission signals.

  As described above, the radio circuit 1 monitors the communication quality and switches the combination of each antenna and each frequency band of the transmission signal to a combination that improves the communication quality. It is possible to suppress deterioration of communication characteristics due to a change in the path or the like.

(Other examples of processing flow)
FIG. 6 is a flowchart illustrating another example of the processing flow in the first embodiment. First, similarly to step S1, the radio circuit 1 starts uplink simultaneous transmission (in other words, simultaneous transmission of a plurality of radio signals in different frequency bands) (step S11). At this time, the frequency bands of the transmission signals output from the power amplifiers 20a and 20b are different from each other.

  Subsequently, the switching control unit 12 determines a priority frequency band (step S12).

  Subsequently, the switching control unit 12 is a combination of each antenna and a preferred frequency band (in other words, a power amplifier (amplifier that amplifies a transmission signal in the preferred frequency band among the antennas 60a and 60b and the power amplifiers 20a and 20b). Hereinafter, the quality detection unit 11 calculates the quality (communication quality) of wireless communication via each antenna (the connection relationship with the priority power amplifier) is changed (step S13).

  The switching control unit 12 controls the connection relationship between the antennas 60a and 60b and the priority power amplifier, and all combinations (specifically, (i) the antenna 60a and the priority power amplifier) between each antenna and the priority power amplifier. And a combination of antenna 60b and a power amplifier that is not a priority power amplifier, and (ii) antenna 60a and a power amplifier that is not a priority power amplifier are connected, and antenna 60b and a priority power amplifier are connected. Switch the combination) in order.

  Then, the quality detection unit 11 performs the quality of the wireless communication in the preferred frequency band in each combination (for example, the received power in the preferred frequency band or the quality of the transmitted signal in the preferred frequency band fed back from the base station). Calculate

  Subsequently, in step S13, the switching control unit 12 compares the communication quality of the priority frequency band in each combination calculated by the quality detection unit 11, and the communication quality of the priority frequency band becomes the highest (for example, A combination in which the received power of the received signal in the priority frequency band is maximized is determined (step S14).

  In the switching control unit 12, the combination of each antenna used at that time and each frequency band of the transmission signal is different from the combination that is determined in step S14 and the communication quality of the most preferred frequency band becomes high. In this case, the connection circuit 13 (the switches 40a and 40b) is set so that the combination of each antenna and each frequency band of the transmission signal is a combination that increases the communication quality of the most preferred frequency band determined in step S14. Control (step S15).

  Then, the switching control unit 12 determines whether or not the communication is finished (step S16), and when the communication is finished (YES in step S16), the process is completed. On the other hand, if the communication has not ended (NO in step S16), the switching control unit 12 and the quality detection unit 11 wait until a predetermined time elapses (step S17), and then return to step S2 to return each antenna. And the communication quality in all combinations of the frequency bands of the transmission signals.

  As described above, the radio circuit 1 monitors the communication quality and switches the combination of each antenna and each frequency band of the transmission signal to a combination that improves the communication quality in a predetermined frequency band to be prioritized. As a result, it is possible to suppress deterioration of communication characteristics due to a user's way of holding, a change in propagation path, and the like. In particular, communication at a frequency at which important communication is performed can be performed with good communication characteristics.

(Wireless terminal)
FIG. 2 is a diagram showing a schematic configuration of a network system according to an embodiment of the present invention. As shown in FIG. 2, this network is a so-called HetNet (heterogeneous network) composed of a macro cell 70a and a small cell 70b. The base station 71a is a base station of the macro cell 70a, and the base station 71b is a base station of the small cell 70b. The wireless terminal 80 includes the wireless circuit 1 and can simultaneously communicate with the base station 71a at the frequency 1 and at the frequency 2 different from the base station 71b and the frequency 1.

  Note that the wireless circuit 1 included in the wireless terminal 80 is not limited to this, but as described above, a priority frequency band may be set. At this time, whether the frequency band to be prioritized is the frequency 1 or the frequency 2 may be appropriately determined according to the design policy. For example, it is generally considered that the radio terminal 80 communicates (loads off) a lot of data with the base station 71b of the small cell 70b. Good. Further, since the wireless terminal (wireless terminal) end 80 exchanges control information (C-Plane data) with the base station 71a of the macro cell 70a, the wireless terminal 80 reliably communicates with the base station 71a. May be set to a frequency band in which frequency 1 is prioritized.

[Embodiment 2]
The following will describe another embodiment (Embodiment 2) of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 3 is a schematic diagram illustrating a configuration of the wireless circuit 2 according to the second embodiment. As shown in FIG. 3, the wireless circuit 2 is provided with a connection circuit 14 instead of the connection circuit 13. As a result, the radio circuit 2 can receive with two reception systems for one frequency band. Thereby, for example, it is possible to cope with downlink MIMO.

  The connection circuit 14 includes duplexers 30a and 30b, filters 31a and 31b, diplexers 50a and 50b, switches 40a and 40b, and switches 41a and 41b.

  The duplexer 30 a outputs the transmission signal input from the power amplifier 20 a to the diplexer 50 a and outputs the reception signal input from the diplexer 50 a to the modulation / demodulation processing unit 10. The duplexer 30b outputs the transmission signal input from the power amplifier 20b to the diplexer 50b, and outputs the reception signal input from the diplexer 50b to the modulation / demodulation processing unit 10.

  The filter 31 a outputs the reception signal input from the diplexer 50 a to the modulation / demodulation processing unit 10. The filter 31b outputs the reception signal input from the diplexer 50b to the modulation / demodulation processing unit 10.

  The diplexer 50a outputs the transmission signal input from the duplexer 30a to the switch 40a, and outputs the reception signal input from the switch 40a to either the duplexer 30a or the filter 31a. The diplexer 50b outputs the transmission signal input from the duplexer 30b to the switch 40b, and outputs the reception signal input from the switch 40b to either the duplexer 30b or the filter 31b.

  The switch 40a selectively outputs the transmission signal input from the diplexer 50a to either the switch 41a or 41b, and outputs the reception signal input from the switch 41a or 41b to the diplexer 50a. The switch 40b selectively outputs the transmission signal input from the diplexer 50b to either the switch 41a or 41b, and outputs the reception signal input from the switch 41a or 41b to the diplexer 50b.

  The switch 41a transmits the transmission signal input from the switch 40a or 40b to the antenna 60a, and selectively outputs the reception signal input from the antenna 60a to either the switch 40a or 40b. The switch 41b transmits the transmission signal input from the switch 40a or 40b to the antenna 60b, and selectively outputs the reception signal input from the antenna 60b to either the switch 40a or 40b.

  The connection circuit 14 is individually connected to each of the power amplifiers 20a and 20b, and includes switches 40a and 40b that are selectively connected to any of the paths for connecting to each of the antennas 60a and 60b. . Accordingly, the switch control unit 12 controls the switches 40a and 40b so that the plurality of power amplifiers are not connected to any of the paths for connecting to the antennas 60a and 60b, so that any of the circuit elements can be controlled. In contrast, it is possible to prevent a plurality of transmission signals from being supplied at the same time, thereby suppressing deterioration of transmission signal characteristics due to intermodulation distortion (for example, as shown in FIG. 3, one transmission signal includes 90a to 91a. It is sufficient that the other transmission signal passes through the route indicated by -92a and the other transmission signal passes the route indicated by 90b-91b-92b).

  Similarly to the first embodiment, the switching control unit 12 controls the connection relationship between each antenna and each power amplifier by the connection circuit 13 so that the communication quality detected by the quality detection unit 11 is improved. Degradation of communication characteristics due to a person's holding method, propagation path change, and the like can be suppressed.

  Further, in the first embodiment, when the quality detection unit 11 measures the reception power of the reception signal from each antenna (step S2 in FIG. 5), the switching control unit 12 determines the connection relationship between each antenna and each power amplifier. There was a need to control. However, in the present embodiment, since one frequency band can be received by two receiving systems, the switching control unit 12 does not control the connection relationship between each antenna and each power amplifier, and quality detection is performed. The unit 11 can measure the received power of the received signal from each antenna.

[Embodiment 3]
The following will describe still another embodiment (Embodiment 3) of the present invention with reference to FIG. For convenience of explanation, members having the same functions as those described in the embodiment are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 4 is a schematic diagram illustrating a configuration of a wireless circuit according to the third embodiment of the present invention. As shown in FIG. 4, the wireless circuit 3 is provided with a connection circuit 15 instead of the connection circuit 14. Thereby, the radio circuit 3 performs TDD (Time Division Duplex) communication instead of FDD communication.

  The connection circuit 15 includes switches 42a and 42b and diplexers 50a and 50b. The switch 42a selectively outputs the transmission signal input from the power amplifier 20a to either the diplexer 50a or 50b, and outputs the reception signal input from the diplexer 50a or 50b to the modulation / demodulation processing unit 10. The switch 42b selectively outputs the transmission signal input from the power amplifier 20b to either the diplexer 50a or 50b, and outputs the reception signal input from the diplexer 50a or 50b to the modulation / demodulation processing unit 10.

  The connection circuit 15 includes switches 42a and 42b that are individually connected to the power amplifiers 20a and 20b and selectively connected to any of the paths for connecting to the antennas 60a and 60b. . Accordingly, the switching control unit 12 controls the switches 42a and 42b so that the plurality of power amplifiers are not connected to any of the paths for connecting to the antennas 60a and 60b, so that any of the circuit elements can be controlled. In contrast, it is possible to prevent a plurality of transmission signals from being supplied at the same time, thereby suppressing deterioration of transmission signal characteristics due to intermodulation distortion (for example, as shown in FIG. 4, one transmission signal includes 90a to 91a. The other transmission signal may pass the route indicated by 90b to 91b).

  Similarly to the first embodiment, the switching control unit 12 controls the connection relationship between each antenna and each power amplifier by the connection circuit 13 so that the communication quality detected by the quality detection unit 11 is improved. Degradation of communication characteristics due to a person's holding method, propagation path change, and the like can be suppressed.

[Example of software implementation]
The control blocks (particularly the modulation / demodulation processing unit 10, the quality detection unit 11, and the switching control unit 12) of the radio circuits 1 to 3 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like. Alternatively, it may be realized by software using a CPU (Central Processing Unit).

  In the latter case, the radio circuits 1 to 3 include a CPU that executes instructions of a program that is software that realizes each function, and a ROM (Read Only Memory) in which the program and various data are recorded so as to be readable by the computer (or CPU). ) Or a storage device (these are referred to as “recording media”), a RAM (Random Access Memory) for expanding the program, and the like. And the objective of this invention is achieved when a computer (or CPU) reads the said program from the said recording medium and runs it. As the recording medium, a “non-temporary tangible medium” such as a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. The program may be supplied to the computer via an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

[Summary]
The radio circuits (1 to 3) according to the aspect 1 of the present invention are radio circuits that simultaneously transmit a plurality of radio signals in different frequency bands, and include a plurality of antennas (60a and 60b) and a plurality of transmission signal amplifiers (Power amplifiers 20a and 20b), a connection circuit (14) that connects each antenna and each transmission signal amplifier in a one-to-one relationship, and a plurality of transmission signal amplifiers that simultaneously modulate a plurality of radio signals. The modulation processing unit (modulation / demodulation processing unit 10), the quality detection means (quality detection unit 11) for detecting the quality of wireless communication performed via each antenna, and the quality detected by the quality detection means are improved. And connection control means (switching control unit 12) for controlling the connection relationship between each antenna and each transmission signal amplifier by the connection circuit.

  According to the above configuration, by changing the combination of each antenna and each frequency band (transmission signal amplifier) of the transmission signal to a combination that improves the communication quality, the user's holding method, propagation path change, etc. It is possible to suppress the deterioration of communication characteristics due to.

  A radio circuit according to aspect 2 of the present invention includes a plurality of circuit elements forming a connection path between the antenna and the transmission signal amplifier in aspect 1, and the connection control means includes the plurality of circuit elements. For any of these, the connection relationship may be controlled so that transmission signals output from a plurality of the transmission signal amplifiers are not supplied simultaneously.

  According to the above configuration, by controlling so that a plurality of transmission signals do not pass through each of a plurality of circuit elements, it is possible to prevent deterioration of the characteristics of the transmission signal due to intermodulation distortion.

  In the wireless circuit according to aspect 3 of the present invention, in the aspect 2, the plurality of circuit elements are individually connected to each of the plurality of transmission signal amplifiers and connected to each of the plurality of antennas. A plurality of switches (40a, 40b, 41a, 41b, 42a, and 42b) selectively connected to any one of the paths, and the connection control means for connecting to each of the plurality of antennas The plurality of switches may be controlled so that the plurality of transmission signal amplifiers are not connected to any of the paths.

  According to said structure, a radio | wireless circuit can be controlled so that a some transmission signal may not pass simultaneously with respect to each of a some circuit element using the said switch. Therefore, the radio circuit can preferably prevent deterioration of the characteristics of the transmission signal due to intermodulation distortion.

  In the wireless circuit according to aspect 4 of the present invention, in the above aspects 1 to 3, the connection control means improves the quality of wireless communication in a predetermined priority frequency band detected by the quality detection means. In addition, the connection relationship between each antenna and each transmission signal amplifier by the connection circuit may be controlled.

  According to said structure, a radio | wireless circuit communicates by radio | wireless using the antenna and transmission signal amplifier which the communication characteristic of a specific frequency band improves. Therefore, the wireless circuit can perform wireless communication suitable for the use situation, for example, important communication is performed with good communication characteristics.

  A wireless terminal according to aspect 5 of the present invention includes the wireless circuit according to aspects 1 to 4 described above.

  According to said structure, there exists an effect equivalent to said aspect 1-4.

  The wireless circuit according to each aspect of the present invention may be realized by a computer. In this case, the wireless circuit is realized by the computer by causing the computer to operate as each unit included in the wireless circuit. A control program and a computer-readable recording medium on which the control program is recorded also fall within the scope of the present invention.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.

  The present invention can be used in the field of manufacturing wireless terminals.

1 to 3 radio circuits 10 modulation / demodulation processing unit (modulation processing unit)
11 Quality detection unit (quality detection means)
12 Switching control unit (connection control means)
13-15 Connection circuit 20a, 20b Power amplifier (transmission signal amplifier)
30a, 30b Duplexer (circuit element, duplexer)
31a, 31b Filter (circuit element)
40a, 40b, 41a, 41b, 42a, 42b Switch (circuit element)
50a, 50b Diplexer (circuit element, duplexer)
60a, 60b Antenna 80 Wireless terminal

Claims (5)

A wireless circuit for simultaneously transmitting a plurality of wireless signals in different frequency bands,
Multiple antennas,
A plurality of transmission signal amplifiers;
A connection circuit for connecting each antenna and each transmission signal amplifier in a one-to-one relationship;
A modulation processing unit connected to the plurality of transmission signal amplifiers for simultaneously modulating a plurality of radio signals;
Quality detection means for detecting the quality of wireless communication made via each antenna;
Connection control means for controlling the connection relationship between each antenna and each transmission signal amplifier by the connection circuit so that the quality detected by the quality detection means is improved ,
A wireless circuit that performs carrier aggregation using each of the antennas. The connection circuit includes a plurality of circuit elements constituting a connection path between the antenna and the transmission signal amplifier,
The connection control means controls the connection relation so that transmission signals output from the plurality of transmission signal amplifiers are not simultaneously supplied to any of the plurality of circuit elements. The radio circuit according to 1. The plurality of circuit elements are:
A plurality of switches that are individually connected to each of the plurality of transmission signal amplifiers and selectively connected to any of the paths for connecting to each of the plurality of antennas;
3. The connection control means controls the plurality of switches so that the plurality of transmission signal amplifiers are not connected to any of paths for connecting to the plurality of antennas. A radio circuit according to 1.   The connection control means determines the connection relationship between each antenna and each transmission signal amplifier by the connection circuit so that the quality of wireless communication in a predetermined priority frequency band detected by the quality detection means is improved. The radio circuit according to claim 1, wherein the radio circuit is controlled.   A wireless terminal comprising the wireless circuit according to claim 1.

Images