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Motion information measurement method based on MIMO frequency-modulated continuous wave radar coherent phase tracking

A frequency modulation continuous wave and motion information technology, applied in the field of wireless communication, can solve the problems of serious measurement deviation, large influence of transceiver coupling, low working frequency band, etc., and achieve the goal of improving measurement accuracy, spatial resolution, and adaptability Effect

Active Publication Date: 2020-06-16
顾昌展
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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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  • Motion information measurement method based on MIMO frequency-modulated continuous wave radar coherent phase tracking
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  • Motion information measurement method based on MIMO frequency-modulated continuous wave radar coherent phase tracking

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Embodiment Construction

[0020] like 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 an...

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Abstract

The invention relates to a motion information measurement method based on MIMO frequency-modulated continuous wave radar coherent phase tracking. The method comprises the following steps: reconstructing a received signal of an MIMO frequency-modulated continuous wave radar system into a complex-domain beat frequency signal, and then carrying out operation based on a coherent phase target trackingalgorithm to obtain the motion trail of a detection target. According to the invention, while sub-millimeter motion information measurement is realized, the M-transmitting and N-receiving MIMO radar is equivalent to the one-transmitting and M * N-receiving SIMO radar, so that the spatial resolution of the radar is greatly improved, and accurate measurement of motion information of targets in different directions is realized.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/72G01S7/41
CPCG01S13/72G01S7/411
Inventor 顾昌展刘劲涛张跃平毛军发
Owner 顾昌展
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