Search

CN-121984611-A - V-band ASK modulation wave receiver sensitivity test method and system

CN121984611ACN 121984611 ACN121984611 ACN 121984611ACN-121984611-A

Abstract

The invention belongs to the technical field of short-distance millimeter wave wireless communication, and particularly relates to a sensitivity test method and system for a V-band ASK modulation wave receiver. The method comprises the steps of enabling an output signal of a signal source to be connected to an LO input end of a mixer after frequency multiplication is carried out on the output signal through a frequency multiplier, enabling an output periodic clock signal of a code error instrument to be connected to an IF input end of the mixer after attenuation is carried out on the output periodic clock signal through an adjustable attenuator, observing whether an output local oscillation leakage signal of the mixer is consistent with an output baseband signal amplitude through a frequency spectrograph or not through adjusting an adjustable attenuator coefficient, enabling the output signal of the mixer to be connected to an antenna after amplification is carried out on the output signal of the mixer through a low noise amplifier, enabling a chip to be tested to receive the antenna signal, enabling the demodulated baseband signal to be connected to the code error instrument through adjusting the amplifier coefficient, and judging whether a test result of the code error instrument is passed or not. The invention is used for realizing the real-time error code statistics function of the transceiver for transmitting and receiving baseband signals, thereby comprehensively and accurately completing the test of the sensitivity performance of the receiver.

Inventors

  • ZHAO LIN
  • WANG XIANGWEI
  • YANG LINYUN
  • SHAO JIE
  • WAN SHUQIN
  • CHEN MINQI

Assignees

  • 中国电子科技集团公司第五十八研究所

Dates

Publication Date
20260505
Application Date
20260130

Claims (9)

  1. 1. A method for testing sensitivity of a V-band ASK modulated wave receiver, comprising: the output signal of the signal source is subjected to frequency multiplication by a frequency multiplier and then is connected to the LO input end of the frequency mixer; The method comprises the steps of carrying out attenuation on an output periodic clock signal of an error code instrument through an adjustable attenuator and then accessing the attenuated clock signal to an IF input end of a mixer, adjusting an adjustable attenuator coefficient, observing whether an output local oscillator leakage signal of the mixer is consistent with an output baseband signal amplitude through a frequency spectrograph, IF so, setting the output signal of the error code instrument as a PRBS code signal, and IF not, continuously adjusting the adjustable attenuator coefficient; The output signal of the mixer is amplified by the low noise amplifier and then is connected to the antenna, the amplifier coefficient is adjusted, the demodulated baseband signal is connected to the error code meter after the antenna signal is received by the chip to be tested, whether the test result of the error code meter is passed or not is judged, if so, the test is ended, and if not, the amplifier coefficient is continuously adjusted.
  2. 2. The method for testing sensitivity of a V-band ASK modulated wave receiver according to claim 1, wherein the frequency range of the output signal of the signal source is set to 8.3ghz to 12.5ghz, and the frequency multiplication factor N of the frequency multiplier is 6.
  3. 3. The method of claim 1, wherein the adjustable attenuator is adjusted to be 0dB attenuated and then connected to the IF input end of the mixer, and the adjusting the adjustable attenuator coefficient comprises adjusting the output of the adjustable attenuator to reduce the output signal by 1dB.
  4. 4. The method for testing the sensitivity of a V-band ASK modulated wave receiver as defined in claim 1, wherein said low noise amplifier is coupled to an antenna after being adjusted to a gain of 0dB, and said adjusting the amplifier factor comprises adjusting the output of said amplifier to amplify the output signal by 1dB.
  5. 5. The method for testing the sensitivity of a V-band ASK modulated wave receiver according to claim 1, wherein the step of judging whether the test result of the error code meter is passed comprises calculating an error rate in real time by comparing an output signal and an input signal of the error code meter, judging whether the error code occurs at the moment, if so, continuing to adjust the amplifier coefficient, and if not, recording the test result and ending the test.
  6. 6. A V-band ASK modulated wave receiver sensitivity test system for executing a V-band ASK modulated wave receiver sensitivity test method according to any one of claims 1 to 5, comprising: The signal source is used for generating a clock signal with the frequency of DC-15 GHz, and the maximum output signal amplitude of the clock signal is not lower than 10dBm; the frequency multiplier is used for multiplying the frequency of an input signal by an integer multiple, and the output bandwidth supported by the frequency multiplier is 50 GHz-75 GHz; The adjustable attenuator is used for attenuating the amplitude of an input signal, the attenuation range is 0-35 dB, and the bandwidth of the input signal is more than 10 Gbps; the output signal of the mixer is the sum and the difference of the frequencies of the LO local oscillation signal and the IF baseband signal; the output signal of the low-noise amplifier is connected to the transmitting end of the antenna; The antenna, the receiving end signal of the said antenna is connected to the receiver input end of the chip to be measured through PCB wiring; And the error code instrument is used for transmitting and receiving the periodic clock signal and the PRBS code signal in real time so as to calculate the error rate in real time.
  7. 7. The sensitivity test system of a V-band ASK modulated wave receiver according to claim 6, wherein the output signal amplitude of the error code meter is 0.1V-1.2V, the output gain of the low noise amplifier is supported by 0-20 dB, and the input of the low noise amplifier is supported by 50 GHz-75 GHz bandwidth.
  8. 8. The sensitivity test system of a V-band ASK modulated wave receiver according to claim 6, wherein the antenna is a PCB-based surface mount antenna or a PCB-based design on board antenna, and the working center frequency of the antenna is 50ghz to 75ghz.
  9. 9. The sensitivity test system of a V-band ASK modulated wave receiver according to claim 6, wherein said chip to be tested uses a wireless transceiver circuit with binary amplitude keying 2ASK modulation and a communication carrier of 50ghz to 75ghz.

Description

V-band ASK modulation wave receiver sensitivity test method and system Technical Field The invention belongs to the technical field of short-range millimeter wave wireless communication, and particularly relates to a sensitivity test method and a sensitivity test system for a V-band ASK modulation wave receiver, which are used for sensitivity performance test of a V-band short-range wireless transceiver circuit. Background The frequency range of the V-band is 40GHz to 75GHz, and the frequency band belongs to the millimeter wave category and has the basic characteristics of wide frequency band and short wavelength. The invention is mainly aimed at a wireless transceiver circuit which uses 2ASK modulation and has a communication carrier wave of about 50 GHz-75 GHz. The wireless transceiver has the advantages of high speed, large capacity, interference resistance, good safety performance and the like, can replace the traditional wired connector and connecting cable in wide military and civil electronic equipment, and solves the problems of transmission bandwidth, reliability, electromagnetic interference and the like. The minimum amplitude of the signal received by the sensitivity characterization signal receiver is an important performance index of a transceiver circuit, the most common and simplest test methods at present are two types, one is that the signal sent by a sending part of the transceiver circuit is directly used, the amplitude is attenuated by an attenuator and then directly sent to a receiver part for testing, the test method has the defects that the carrier frequency point of a modulated signal is fixed and cannot be actively regulated, the other method is that the modulated signal is directly generated by a radio frequency vector signal source and sent to the receiver for testing, the carrier frequency of the modulated signal can be regulated by the method, but error statistics cannot be carried out on a baseband signal demodulated by the receiver, and the carrier signal source of a V band has high price and the test cost is too high. Disclosure of Invention The invention aims to provide a sensitivity test method and a system for a V-band ASK modulation wave receiver, which can generate a V-band 2ASK modulation signal with adjustable amplitude and frequency and realize a real-time error code statistics function of a transceiver for transmitting and receiving baseband signals, thereby comprehensively and accurately completing the sensitivity performance test of the receiver. In order to solve the technical problems, the invention provides a sensitivity test method of a V-band ASK modulation wave receiver, which comprises the following steps: the output signal of the signal source is subjected to frequency multiplication by a frequency multiplier and then is connected to the LO input end of the frequency mixer; The method comprises the steps of carrying out attenuation on an output periodic clock signal of an error code instrument through an adjustable attenuator and then accessing the attenuated clock signal to an IF input end of a mixer, adjusting an adjustable attenuator coefficient, observing whether an output local oscillator leakage signal of the mixer is consistent with an output baseband signal amplitude through a frequency spectrograph, IF so, setting the output signal of the error code instrument as a PRBS code signal, and IF not, continuously adjusting the adjustable attenuator coefficient; The output signal of the mixer is amplified by the low noise amplifier and then is connected to the antenna, the amplifier coefficient is adjusted, the demodulated baseband signal is connected to the error code meter after the antenna signal is received by the chip to be tested, whether the test result of the error code meter is passed or not is judged, if so, the test is ended, and if not, the amplifier coefficient is continuously adjusted. Preferably, the frequency range of the output signal of the signal source is set to 8.3 GHz-12.5 GHz, and the frequency multiplication coefficient N of the frequency multiplier is 6. Preferably, the adjustable attenuator is connected to the IF input end of the mixer after being adjusted to 0dB attenuation, and the adjusting of the adjustable attenuator coefficient comprises adjusting the output of the adjustable attenuator to reduce the output signal by 1dB. Preferably, the low noise amplifier is connected to the antenna after being adjusted to 0dB gain, and the adjusting of the amplifier coefficient comprises adjusting the output of the amplifier to amplify the output signal by 1dB. Preferably, the judging of whether the test result of the error code instrument passes includes calculating the error code rate in real time by comparing the output signal and the input signal of the error code instrument, judging whether the error code occurs at the moment, if so, continuing to adjust the amplifier coefficient, and if not, recording the test result and ending the