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WO2018191985A1 - Système de commande radiofréquence et procédé de commande - Google Patents

Système de commande radiofréquence et procédé de commande Download PDF

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Publication number
WO2018191985A1
WO2018191985A1 PCT/CN2017/081535 CN2017081535W WO2018191985A1 WO 2018191985 A1 WO2018191985 A1 WO 2018191985A1 CN 2017081535 W CN2017081535 W CN 2017081535W WO 2018191985 A1 WO2018191985 A1 WO 2018191985A1
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WO
WIPO (PCT)
Prior art keywords
radio frequency
signal
power value
attenuator
control system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/081535
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English (en)
Chinese (zh)
Inventor
胡汝佳
谢鹏
代元甲
苏俊杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SZ DJI Technology Co Ltd
Original Assignee
SZ DJI Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SZ DJI Technology Co Ltd filed Critical SZ DJI Technology Co Ltd
Priority to CN201780004596.4A priority Critical patent/CN108513692A/zh
Priority to PCT/CN2017/081535 priority patent/WO2018191985A1/fr
Publication of WO2018191985A1 publication Critical patent/WO2018191985A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/04—Circuits
    • H04B2001/0408—Circuits with power amplifiers
    • H04B2001/0416—Circuits with power amplifiers having gain or transmission power control

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a radio frequency power control system and method.
  • the above radio frequency system includes a transmitter and a receiver.
  • the transmitter is responsible for frequency-modulating the baseband signal to a high-frequency signal, and then transmitting it to the free space through the antenna;
  • the receiver receives the radio frequency signal from the free space, and down-converts and demodulates to the baseband signal, thereby realizing the transmission of the signal in free space. Therefore, the radio frequency system is the basis of the entire wireless communication system, and the reliability of the radio frequency control system is the basis for ensuring the normal operation of the wireless communication system.
  • the RF control system has functions such as power control and transmission/reception status monitoring.
  • the relay device is used to cover and relay the electromagnetic wave signals.
  • the above-mentioned relay device can ensure that the output power is constant when over-excited within a preset range.
  • the relay device may have an antenna connection mismatch or even an open circuit, causing the RF system output signal to be mostly reflected by the antenna port to damage some devices in the RF system.
  • an ALC (Automatic Level Control) automatic level controller is added to the RF system, and the ALC circuit converts the output RF signal into a DC component, and amplifies the DC component as a bias reference of the RF system input signal.
  • the above ALC circuit is affected by the modulation system and output power in the RF system, and the ALC circuit needs to be modified accordingly, so that the detection accuracy and dynamic use range of the RF system are limited.
  • the invention provides a radio frequency control system and a control method.
  • a radio frequency control system comprising a first detection circuit, a first pulse processing circuit and a controller;
  • the first detecting circuit is configured to convert the received radio frequency signal into a direct current signal and send the signal to the first pulse processing circuit;
  • the first pulse processing circuit is configured to perform analog-to-digital conversion of the DC signal to obtain a digital pulse signal and send the signal to the controller;
  • the controller is configured to collect the power of each received pulse signal to obtain an actual power value of the radio frequency signal, and generate a preset instruction to send to the radio frequency signal transmitting end according to the comparison result between the actual power value and the target output power value. To adjust the transmit power of subsequent RF signals.
  • a radio frequency control system comprising a controller and a first power meter
  • the first power meter is configured to acquire an actual power value of the received radio frequency signal and send the value to the controller;
  • the controller is configured to generate a preset command according to the comparison result between the actual power value and the target output power value, and send the preset instruction to the radio frequency signal transmitting end to adjust the transmit power of the subsequent radio frequency signal.
  • a method for controlling a radio frequency control system comprising:
  • the first detection circuit converts the received radio frequency signal into a DC signal and sends it to the first pulse processing circuit, and then uses the first pulse processing circuit to perform the DC signal.
  • the digital conversion obtains the digital pulse signal and sends it to the controller; finally, the controller counts the received power of each pulse signal to obtain the RF signal.
  • the actual power value of the number and then based on the comparison result of the actual power value and the target output power value, generates a preset command and sends it to the RF signal transmitting end to adjust the transmitting power of the subsequent RF signal. It can be seen that the embodiment of the invention can control the output power of the RF signals of different standards and improve the adaptation range of the control system.
  • FIG. 5 are schematic structural diagrams of an RF control system according to an embodiment of the present invention.
  • 6 to 7 are schematic structural diagrams of a radio frequency control system according to another embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of a method for controlling a radio frequency control system according to an embodiment of the present invention.
  • the radio frequency system multiplexes the antenna ANT in time, so that the radio frequency system has a transmission link (TX link) and a reception link (RX link).
  • TX link refers to a radio frequency signal transmission link formed by the radio frequency system and the antenna when the antenna transmits the radio frequency signal
  • RX link refers to the radio frequency signal receiving chain formed by the radio frequency system and the antenna when the antenna receives the radio frequency signal. road.
  • the transmitter of the radio frequency signal that is, the transmitter
  • the antenna can be compensated.
  • the transmitter outputs constant power, but the output power of the radio frequency signal needs to be compensated by the influence of the communication environment as an example for description.
  • the detection tube is used to convert the radio frequency signal into a direct current component, and then the direct current component is processed as a reference bias, which is suitable for detecting a sine wave.
  • the UAV adopts TDD (Time Division Duplexing) time division duplex mode to realize two-way communication
  • the detection tube needs to detect and output a time slot signal with a duty ratio, and at this time, the detected DC components are inconsistent, affecting detection accuracy and output. Power control accuracy.
  • the above-mentioned RF control system needs to perform hardware adjustment according to different types of RF signals, resulting in extremely limited use range.
  • the output power detection and the standing wave detection are implemented by the same circuit, which causes the two to influence each other, the dynamics of the detection are limited, and the consistency of the detection results is poor.
  • the radio frequency control system includes a first detection circuit 2, a first pulse processing circuit 3, and a controller 4.
  • the first detecting circuit 2 is configured to convert the received radio frequency signal into a direct current signal and send the signal to the first pulse processing circuit 2.
  • the first pulse processing circuit 2 is configured to perform analog-to-digital conversion on the DC signal to obtain a digital pulse signal and transmit the signal to the controller 4.
  • the controller 4 collects the power of each pulse signal to obtain the actual power value of the radio frequency signal, and then generates a preset command according to the comparison result between the actual power value and the target output power value, and sends the preset command to the radio frequency signal transmitting end to adjust the subsequent radio frequency. The transmit power of the signal.
  • the radio frequency control system further includes a circulator 6 and a first signal coupling circuit 1 disposed at an input end of the circulator 6.
  • the input end of the circulator 6 is connected to the TX link, and can receive the radio frequency signal transmitted by the radio frequency system.
  • the first signal coupling circuit 1 is disposed at the input of the circulator 6 for transmitting a radio frequency signal coupled to the input of the circulator 6 to the first detector circuit 2.
  • the first signal coupling circuit 1 only couples a certain proportion of the RF signal, for example, the above ratio may be 5%.
  • the above-mentioned ratio can be adjusted according to actual needs, which is not limited in the embodiment of the present invention.
  • the radio frequency control system further includes an attenuation circuit 5.
  • the attenuation circuit 5 is connected to the controller 4, receives a preset command from the controller 4, and compensates the output power of the radio frequency signal according to the preset command.
  • the first signal coupling circuit 1, the first detecting circuit 2, the first pulse processing circuit 3, the controller 4 and the attenuator 5 can adjust the output power of the radio frequency signal.
  • the analog signal is converted into a pulse signal to obtain a pulse signal, which can avoid the DC component corresponding to the same duty cycle RF signal in different systems in the related art, or the DC component corresponding to different duty ratios in the same system is consistent.
  • the power of each pulse signal is obtained to obtain the actual power value of the radio frequency signal for processing, which can improve the control precision and the adaptation range of the system.
  • the first detection circuit 2 can be implemented by using a diode or a Root Mean Square (RMS) detection chip.
  • RMS Root Mean Square
  • a person skilled in the art can also detect the radio frequency signal according to the function of the first detecting circuit 2 and select a corresponding detecting circuit. The above solution also falls within the protection scope of the present invention.
  • the first pulse processing circuit 3 includes at least a first analog to digital converter 31 and a first threshold unit 32.
  • the first analog to digital converter 31 is connected to the first detection circuit 2, and the first threshold unit 32 is connected to the controller 4.
  • the first analog-to-digital converter 31 samples the DC signal from the first detector circuit 2 according to a preset acquisition frequency, so that the DC signal can be analog-to-digital converted to obtain a plurality of pulse signals, and the plurality of pulse signals are sent to the first A threshold unit 32.
  • the first threshold unit 32 compares the amplitude of each pulse signal with a preset amplitude, and selects a pulse signal whose amplitude is greater than or equal to a preset amplitude from the plurality of pulse signals. Send to controller 4.
  • each of the plurality of pulse signals has different amplitudes, and the pulse signals of different amplitudes correspond to different energies, and the pulse signals of the same amplitude have the same energy.
  • various DC components are collected by reasonably setting a preset acquisition frequency to ensure the integrity of each DC signal feature. Then, by filtering out the pulse signals satisfying the amplitude requirements from the plurality of pulse signals, it is ensured that the number of pulse signals corresponding to the same duty cycle RF signals in different systems is the same, or the pulses corresponding to the different duty cycle RF signals in the same system. The number of signals is different. It can be seen that the embodiment of the present invention is applicable to a scenario in which the output power of the radio frequency signal under different standards is controlled, and the applicable range is expanded.
  • the first analog-to-digital converter 31 is implemented by using an ADC conversion chip.
  • the first threshold unit 32 can be implemented in hardware, such as a Smith trigger; the first threshold unit 32 can also be a threshold integrated into the ADC conversion chip. Additionally, the first threshold unit 32 can be integrated into the controller 4 or integrated into the controller 4 simultaneously with the ADC conversion chip.
  • the attenuation circuit 5 can be implemented using a voltage controlled attenuator.
  • the voltage controlled attenuator searches for a corresponding control voltage according to a preset instruction of the controller 4, and then superimposes on the current control voltage, outputs the superposed control voltage to the radio frequency signal transmitting end, or transmits the searched control voltage to the circulator 6.
  • the output power of the radio frequency signal is compensated by the circulator 6.
  • the attenuation circuit 5 may include a first attenuator and a second attenuator for the purpose of satisfying the application of accurately adjusting the transmit power of the radio frequency signal.
  • the first attenuator and the second attenuator are respectively connected to the controller 5, and the first attenuator and the second attenuator are connected.
  • the first attenuator is configured to compensate the output power of the radio frequency signal according to the first step length in response to the preset instruction of the controller 4.
  • the second attenuator is configured to compensate the output power of the radio frequency signal according to the second step size in response to the preset instruction of the controller 4.
  • the first attenuator can be implemented with a radio frequency attenuator 51
  • the second attenuator can be implemented with a baseband attenuator 52.
  • the first step length can be set to 0.5 dB
  • the baseband attenuator 52 compensates
  • the second step size can be set to 0.1 dB.
  • the radio frequency attenuator 51 first compensates.
  • S1 and S2 represent the first step length and the second step length, respectively, and N and M represent integers greater than 1.
  • the first step S1 and the second step S2 can be adjusted according to actual requirements, which is not limited in the embodiment of the present invention.
  • the attenuation circuit 5 may only include the first attenuator.
  • the first attenuator 51 can directly compensate 19 first-step lengths, and avoid the influence of the output power increasing too fast on other devices.
  • the first step length may be adjusted according to the specific use scenario, and the uncompensated portion may be reduced. ratio.
  • the attenuation circuit 5 may only include the second attenuator.
  • the second attenuator For the adjustment process of the second attenuator, reference may be made to the description when the first attenuator is included, and details are not described herein again.
  • the radio frequency control system further includes a second detection circuit 8, a second pulse processing circuit 9, and a second signal coupling circuit 10.
  • the second signal coupling circuit 10 is coupled to the output of the circulator 8
  • the second detector circuit 8 is coupled to the second signal coupling circuit 10
  • the second pulse processing circuit 9 is coupled in series with the second detector circuit 8 and the controller 4. between.
  • the second detecting circuit 8 converts the received radio frequency signal into a direct current signal and transmits it to the second pulse processing circuit 9.
  • the second pulse processing circuit 9 performs analog-to-digital conversion on the DC signal to obtain a digital pulse signal and transmits it to the controller 4.
  • the controller 4 counts the received power of each pulse signal to obtain a reflected power value of the radio frequency signal, and calculates a standing wave ratio according to the actual power value and the reflected power value to generate a prompt signal indicating whether the antenna and its subsequent circuits are faulty.
  • the reflected power value refers to a part of the power value corresponding to the radio frequency signal (ie, the reflected signal) that the antenna reflects back to the RX link.
  • the reflected power value can be detected from the circulator output.
  • the second signal coupling circuit 10 only couples a certain proportion of the reflected signal, for example, the above ratio may be 5%.
  • the above-mentioned ratio can be adjusted according to actual needs, which is not limited in the embodiment of the present invention.
  • the second signal coupling circuit 10, the second detecting circuit 8, the second pulse processing circuit 9, and the controller 4 in the above embodiment of the present invention can detect whether there is a fault in the antenna and its subsequent circuits.
  • the configuration and selection of the above components will be further described below.
  • the second detection circuit 8 can be implemented by using a diode or a Root Mean Square (RMS) detection chip.
  • RMS Root Mean Square
  • a person skilled in the art can also detect the radio frequency signal according to the function of the second detecting circuit 8 and select a corresponding detecting circuit, and the above solution also falls within the protection scope of the present invention.
  • the second detection circuit 8 and the first detection circuit 2 are implemented by the same circuit.
  • the second pulse processing circuit 9 includes at least a second analog to digital converter 91 and a second threshold unit 92.
  • the second analog to digital converter 91 is connected to the second detection circuit 8, and the second threshold unit 92 is connected to the controller 4.
  • the second analog-to-digital converter 91 samples the DC signal from the second detector circuit 8 according to a preset acquisition frequency, so that the DC signal can be analog-to-digital converted to obtain a plurality of pulse signals, and a plurality of pulse signals are sent to the first Two threshold unit 92.
  • the second threshold unit 92 compares the amplitude of each pulse signal with a preset amplitude, and selects a pulse signal whose amplitude is greater than or equal to a preset amplitude from the plurality of pulse signals. Send to controller 4.
  • Each of the plurality of pulse signals has different amplitudes, and the pulse signals of different amplitudes correspond to different energies, and the pulse signals of the same amplitude have the same energy.
  • the accuracy of the corresponding power calculation of the radio frequency signal can be improved by setting the second analog-to-digital converter 91 and the second threshold unit 92, and is suitable for calculating the corresponding power of the radio frequency signal in different standards.
  • the second analog-to-digital converter 91 is implemented by using an ADC conversion chip.
  • the second threshold unit 92 can be implemented in hardware, such as a Smith trigger; or can be set to a threshold and integrated into the ADC conversion chip. Additionally, the second threshold unit 92 can be integrated into the controller 4 or integrated into the controller 4 simultaneously with the ADC conversion chip.
  • the second pulse processing circuit 9 and the first pulse processing circuit 3 are implemented using the same circuit.
  • the controller 4 can determine the actual power of the radio frequency signal at the input of the circulator and the reflected power of the radio frequency signal at the output of the circulator according to the calculated standing wave ratio, and the power radiated by the antenna without loss of the circulator (the above actual power) The difference power from the reflected power). Determine whether the antenna is open or the antenna and subsequent circuits are faulty according to the power radiated from the antenna.
  • the above actual power value is stored in the controller during the output power detection process.
  • the actual power value may be equal to or different from the target output power value.
  • the controller sends a preset instruction to the second selection switch, that is, the output power of the transmitting end is satisfied. Standing wave detection is performed when required.
  • the radio frequency control system further includes a first selection switch 11 and a protection circuit 12.
  • the input end of the first selector switch 11 is connected to the output end of the circulator, the first output end of which is connected to the RX link, and the second output end of which is connected to the protection circuit 12.
  • the radio frequency signal received by the second detector circuit 8 is derived from the second signal coupling circuit 10 coupled between the second output of the first selector switch 11 and the protection circuit 12.
  • the first selection switch 11 can select the RX link or the protection circuit 12 in response to a preset instruction of the controller 4.
  • the first selection switch 11 can switch the radio frequency control system to the standing wave detection process and protect the components in the RX link from being damaged.
  • the protection circuit 12 can consume the energy of the radio frequency signal during the standing wave detection process, and protect the subsequent components such as the second detection circuit and the second pulse processing circuit.
  • the first selection switch 11 can be a single-pole double-gate switch, and can also be implemented by using a component to construct a switch circuit having a selection function, which is not limited in the embodiment of the present invention.
  • the radio frequency control system further includes a second selection switch 13.
  • the first input end of the second selection switch 13 is connected to the second signal coupling circuit 10, the second end of which is connected to the first signal coupling circuit 1, and the output end thereof is connected to the first detection circuit 2.
  • the second selector switch 13 is responsive to a predetermined command from the controller 4 to select to receive a radio frequency signal from the input of the circulator 6 or its output.
  • the first pulse processing circuit 3 and the second pulse processing circuit 9 are multiplexed, the first input end of the second selection switch 13 is connected to the output end of the first detection circuit 2, and the second input end thereof is connected. An output terminal of the second detector circuit 8 is connected, and an output terminal thereof is connected to the input terminal of the first pulse circuit 3.
  • a person skilled in the art can reasonably deform in the case of realizing the above functions, and the invention is not limited thereto.
  • the second selection switch 13 can be a single-pole double-gate switch, and can also be implemented by using a component to construct a switch circuit having a selection function, which is not limited in the embodiment of the present invention.
  • the first selection switch 11 and the second selection switch 13 in the embodiment of the present invention may be implemented by the same circuit.
  • the radio frequency control system includes a first power meter 14 and a controller 4.
  • the first signal coupling device 1 is coupled to the input end of the circulator 6 or the TX link, and the first power meter 14 is connected to the first signal coupling device 1 for acquiring the actual power value of the received RF signal and transmitting it to the 4 Controller.
  • the controller 4 determines the ratio of the standing wave ratio of the actual power value and the reflected power value, and then determines the ratio of the RF signal reflected by the antenna to the received RF signal, and determines whether the antenna transmits all the RF signals, thereby determining whether the antenna and its subsequent circuits are There is a fault.
  • the radio frequency control system further includes an attenuation circuit 5.
  • the attenuation circuit 5 is connected to the controller 4, receives a preset command from the controller 4, and compensates the output power of the radio frequency signal according to the preset command.
  • the first power meter 14, the controller 4 and the attenuator 5 can adjust the output power of the radio frequency signal. Since the first power meter 14 can accurately obtain the reflected power value of the radio frequency signal; then the controller 4 determines the standing wave ratio by calculating the actual power value and the reflected power value, thereby improving the judgment accuracy and the adaptation range of the system.
  • the configuration and selection of the above components will be further described below.
  • the attenuation circuit 5 can be implemented using a voltage controlled attenuator.
  • the voltage controlled attenuator searches for a corresponding control voltage according to a preset instruction of the controller 4, and then superimposes it on the control voltage in the current situation, outputs the superimposed control voltage to the radio frequency signal transmitting end, or transmits the searched control voltage to the control voltage.
  • the circulator 6 compensates for the output power of the radio frequency signal by the circulator 6.
  • the attenuation circuit 5 may include a first attenuator and a second attenuator for the purpose of satisfying the application of accurately adjusting the transmit power of the radio frequency signal.
  • the first attenuator and the second attenuator are respectively connected to the controller 5, and the first attenuator and the second attenuator are connected.
  • the first attenuator is configured to compensate the output power of the radio frequency signal according to the first step length in response to the preset instruction of the controller 4.
  • the second attenuator is configured to compensate the output power of the radio frequency signal according to the second step size in response to the preset instruction of the controller 4.
  • the first attenuator can be implemented by using the RF attenuator 51, and the second attenuator This can be achieved with a baseband attenuator 52.
  • the first step length can be set to 0.5 dB
  • the baseband attenuator 52 compensates, the second step size can be set to 0.1 dB.
  • S1 and S2 represent the first step length and the second step length, respectively, and N and M represent integers greater than 1.
  • the first step S1 and the second step S2 can be adjusted according to actual requirements, which is not limited in the embodiment of the present invention.
  • the attenuation circuit 5 may only include the first attenuator.
  • the first attenuator 51 can directly compensate 19 first-step lengths, and prevent the power of the transmitting end from increasing too fast to affect other devices.
  • the case where only one RF attenuator 51 is provided is exemplarily illustrated.
  • the first step length may be adjusted according to a specific use scenario, and the proportion of the uncompensated portion may be reduced. .
  • the attenuation circuit 5 may only include the second attenuator.
  • the second attenuator For the adjustment process of the second attenuator, reference may be made to the description when the first attenuator is included, and details are not described herein again.
  • the radio frequency control system further includes a second power meter. 15 and a second signal coupling circuit 10.
  • the second signal coupling circuit 10 is coupled to the output of the circulator 8, which is coupled to the second signal coupling circuit 10.
  • the second power meter 15 is configured to acquire a reflected power value of the received radio frequency signal and send it to the controller 4.
  • the controller 4 is configured to calculate a standing wave ratio according to the actual power value and the reflected power value to generate a prompt signal indicating whether the antenna and its subsequent circuits are faulty.
  • the controller 4 can determine the ratio of the RF signal reflected by the antenna to the received RF signal according to the calculated standing wave ratio, thereby determining whether the antenna transmits all of the RF signal. If the antenna is open, the antenna will reflect all the RF signals back to the RX link, possibly damaging the components in the RX link.
  • the radio frequency control system further includes: a first selection switch 11 and a protection circuit 12.
  • the input end of the first selector switch 11 is connected to the output of the circulator 6, the first output of which is connected to the RX link, and the second output of which is connected to the protection circuit 12.
  • the radio frequency signal received by the second power meter 15 is from the second signal coupling circuit 10 coupled between the second output of the first selector switch 11 and the protection circuit 12.
  • the first selection switch 11 can select the RX link or the protection circuit 12 in response to a preset instruction of the controller 4. That is, the first selection switch 11 can protect the components in the RX link from being damaged.
  • the protection circuit 12 can consume the energy of the radio frequency signal during the standing wave detection process, and protect the subsequent components of the second power meter 15 and the like.
  • the protection circuit 12 can be implemented by a resistor or by other circuits including a resistor.
  • the first selection switch 11 can be a single-pole double-gate switch, and can also be implemented by using a component to construct a switch circuit having a selection function, which is not limited in the embodiment of the present invention.
  • the radio frequency control system further includes a second selection switch 13.
  • the first input end of the second selection switch 13 is connected to the second signal coupling circuit 10, the second end of which is connected to the first signal coupling circuit 1, and the output end thereof is connected to the first power meter 14.
  • the second selector switch 13 is responsive to a predetermined command from the controller 4 to select to receive a radio frequency signal from the input of the circulator 6 or its output.
  • the second selection switch 13 can be a single-pole double-gate switch, and can also be implemented by using a component to construct a switch circuit having a selection function, which is not limited in the embodiment of the present invention.
  • the first selection switch 11 and the second selection switch 13 in the embodiment of the present invention may be implemented by the same circuit.
  • the embodiment of the invention provides a method for controlling the radio frequency control system. As shown in FIG. 8, the control method includes:
  • S2 Generate a preset command according to the comparison result between the actual power value and the target output power value, and send the preset command to the radio frequency signal transmitting end to adjust the transmit power of the subsequent radio frequency signal.
  • the controller 4 is provided with the control method as an example for description.
  • the controller obtains the actual power value of the radio frequency signal and directly receives the actual power value of the radio frequency signal.
  • the actual power value may be from the first power meter 14, or may directly calculate the actual power value of the radio frequency signal, for example, control.
  • the device 4 receives the pulse signals from the first pulse processing circuit 3 and/or the second pulse processing circuit 9, and then counts the power of each pulse signal to obtain the actual power value of the radio frequency signal.
  • the controller 4 compares the actual power value with the target output power value, and then generates a preset command according to the comparison result.
  • the attenuation circuit 5 includes the voltage control attenuator, the method includes:
  • the controller 4 compares the actual power value with the target output power value, and then generates a preset command according to the comparison result.
  • the attenuation circuit 5 includes only the radio frequency attenuator 51, the method includes:
  • the controller 4 compares the actual power value with the target output power value, and then generates a preset command according to the comparison result.
  • the attenuation circuit 5 includes only the radio frequency attenuator 51, the method includes:
  • N-1 is taken as the first pre-subtraction instruction
  • S1 represents the first step length; N is an integer greater than 1.
  • the controller 4 compares the actual power value with the target output power value, and then generates a preset command according to the comparison result.
  • the attenuation circuit 5 includes the RF attenuator 51 and the baseband attenuator 52, the method includes:
  • N-1 is taken as the first pre-increment instruction
  • S1 represents the first step length; N is an integer greater than 1.
  • the controller 4 compares the actual power value with the target output power value, and then generates a preset command according to the comparison result.
  • the attenuation circuit 5 includes the RF attenuator 51 and the baseband attenuator 52, the method includes:
  • the controller 4 compares the actual power value with the target output power value, and then generates a preset command according to the comparison result.
  • the attenuation circuit 5 includes the RF attenuator 51 and the baseband attenuator 52, the method includes:
  • N-1 is taken as the first pre-subtraction instruction
  • M is the second pre-cut instruction
  • S1 and S2 represent the first step length and the second step length, respectively; N and M are integers greater than 1, respectively.
  • the controller 4 compares the actual power value with the target output power value, and then generates a preset command according to the comparison result.
  • the attenuation circuit 5 includes the RF attenuator 51 and the baseband attenuator 52, the method includes:
  • N-1 is taken as the first pre-increment instruction
  • S1 and S2 represent the first step length and the second step length, respectively; N and M are integers greater than 1, respectively.
  • the relevant parts of the system embodiment can be referred to relevant.
  • the system and method embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie It can be located in one place or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the present disclosure. Those of ordinary skill in the art can understand and implement without any creative effort.

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Abstract

L'invention porte sur un système de commande radiofréquence, comprenant un premier circuit de détection (2), un premier circuit de traitement d'impulsions (3) et un dispositif de commande (4), le premier circuit de détection (2) étant utilisé pour convertir un signal radiofréquence reçu en un signal à courant continu et l'envoyer au premier circuit de traitement d'impulsions (3), le premier circuit de traitement d'impulsions (3) étant utilisé pour effectuer une conversion analogique-numérique du signal à courant continu afin d'obtenir un signal impulsionnel numérique et l'envoyer au dispositif de commande (4), le dispositif de commande (4) étant utilisé pour calculer la puissance du signal impulsionnel reçu afin d'obtenir la valeur de puissance réelle du signal radiofréquence, et générer, en fonction du résultat de comparaison entre la valeur de puissance réelle et une valeur de puissance de sortie cible, une instruction prédéfinie et l'envoyer à un terminal d'émission de signal radiofréquence, de manière à ajuster la puissance d'émission de signaux radiofréquence ultérieurs. Le système de commande radiofréquence peut commander la puissance de sortie de signaux radiofréquence de différents modes, améliorant la plage adaptative du système de commande.
PCT/CN2017/081535 2017-04-21 2017-04-21 Système de commande radiofréquence et procédé de commande Ceased WO2018191985A1 (fr)

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WO2021102730A1 (fr) * 2019-11-27 2021-06-03 深圳市大疆创新科技有限公司 Procédé de commande de plate-forme mobile, dispositif, et support d'enregistrement
CN113391573B (zh) * 2020-03-12 2023-10-27 中国移动通信集团河北有限公司 信号处理电路
CN111865442B (zh) * 2020-07-22 2022-06-28 成都九洲迪飞科技有限责任公司 一种收发组件的发射检波方法
CN112054767B (zh) * 2020-09-07 2024-04-16 珠海格力电器股份有限公司 信号处理方法、电路、装置、存储介质及处理器
CN112596111B (zh) * 2020-11-04 2024-02-13 普联技术有限公司 障碍物识别方法、装置、设备及可读存储介质
CN115765778A (zh) * 2022-11-11 2023-03-07 广东移远通信技术有限公司 一种功率控制方法、射频收发机

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