Motion information measurement method based on mimo frequency modulation continuous wave radar coherent phase tracking
A FM continuous wave and motion information technology, applied in the field of wireless communication, it can solve the problems of low working frequency band, great influence of transceiver coupling, serious measurement deviation, etc., and achieve the effect of improving adaptability, high working frequency band and improving accuracy.
Active Publication Date: 2022-05-10
上海希卡立科技有限公司
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Problems solved by technology
However, the working frequency band of this prior art is low, and it is not sensitive enough to small movements; no phase compensation method is proposed for the additional changes in the phase measurement, and serious deviations may occur during the measurement; no time domain filtering is performed, which is greatly affected by the coupling of transceivers; Measure the angle of an object relative to the radar
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[0020] Such as figure 1 As shown, the MIMO frequency modulation continuous wave radar system involved in this embodiment includes: a phase-locked loop, a radio frequency module, an intermediate frequency amplification module, an ADC, and an MCU, wherein: the MCU generates different modulation waveforms by configuring the phase-locked loop to realize the corresponding modulation mode , the modulation waveform generated by the phase-locked loop is input to the voltage-controlled oscillator (VCO) to generate a transmission signal, and the transmission signal is transmitted to the detection target through the transmission antenna TX1, TX2...TXM and the scattering phenomenon occurs, generating a reflection modulated with the motion information of the detection target The signal is received by the receiving antennas RX1, RX2...RXN, and the received signal obtained by each receiving antenna is respectively combined with the transmitted signal to obtain N-way orthogonal signals through...
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A motion information measurement method based on MIMO frequency modulation continuous wave radar coherent phase tracking, by reconstructing the received signal of the MIMO frequency modulation continuous wave radar system into a complex domain beat frequency signal, and further obtaining the motion trajectory of the detection target through the coherent phase target tracking algorithm . The invention can realize submillimeter-level motion information measurement, and at the same time, the MIMO radar with M transmission and N reception is equivalent to a SIMO radar with 1 transmission and M×N reception, which greatly improves the spatial resolution of the radar and realizes the detection of different directions. Accurate measurement of the target's motion information.
Description
technical field [0001] The present invention relates to a technology in the field of wireless communication, specifically a method for accurately measuring relative motion based on millimeter-wave radar, which is not only applicable to MIMO-FMCW radar systems, but also can be used without using the virtual array method. Applicable to single-engine-single-receive-FMCW radar system and SIMO-FMCW radar system. Background technique [0002] Since the 20th century, frequency-modulated continuous wave (FMCW) radar has been widely used in road vehicle monitoring and recording systems, automotive anti-collision radars, traffic flow detectors, automatic driving, gesture interaction, medical and other civilian fields. Frequency modulated continuous wave radar has the advantages of simple structure, easy modulation, and low cost. The signal modulation of FMCW radar mainly includes three modes: triangle wave modulation, sawtooth wave modulation and sine wave modulation. Among them, si...
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IPC IPC(8): G01S13/72G01S7/41
CPCG01S13/72G01S7/411
Inventor 顾昌展刘劲涛张跃平毛军发
Owner 上海希卡立科技有限公司