Fully Coherent Continuous Wave Doppler Radar and Its Range and Velocity Measurement Method

A radar ranging and Doppler frequency technology, which is applied in the field of full coherent continuous wave Doppler radar and its ranging and speed measurement, can solve the problem of not having the ability of ranging, unable to measure speed, increasing the sampling rate of intermediate frequency and the amount of signal processing calculation And other issues
CN106405541BActive Publication Date: 2021-06-01SUZHOU TUSHI ELECTRONICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUZHOU TUSHI ELECTRONICS TECH CO LTD
Publication Date
2021-06-01

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Abstract

The invention discloses a fully coherent continuous wave Doppler radar and its distance measurement and speed measurement method. First, the difference frequency complex signal obtained by mixing the echo signal and the transmission signal is obtained, and according to the range frequency-Doppler frequency and the target distance ‑Modulation characteristics of velocity, using the two-dimensional joint detection method of distance dimension FFT + azimuth dimension MTD, using multiple coherent high repetition frequency modulation signals to independently obtain unambiguous radial velocity information, and then introduce the velocity into the Doppler The information is removed in the distance dimension and frequency domain information to eliminate the influence of distance-velocity coupling, so as to further obtain accurate distance information. The invention has the characteristics of coherent radar speed measurement and continuous wave radar distance measurement without distance blind zone, and meets the requirements of no distance blind zone, simultaneous distance measurement and speed measurement, real-time performance, miniaturization, and low power consumption.
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Description

technical field

[0001] The invention relates to the field of continuous wave measuring radar, in particular to a fully coherent continuous wave Doppler radar and a method for measuring distance and speed. Background technique

[0002] The traditional full-coherent radar that can measure distance and speed at the same time adopts the pulse Doppler system. The distance between the target is determined by measuring the time difference between the target reflection signal and the transmitted pulse by transmitting a coherent pulse train, and the Doppler of the echo signal is analyzed by FFT between pulses. The spectrum obtains the speed information of the target, so it has the two-dimensional measurement capability of distance and speed. However, there is a distance blind zone in this system, and in the case of high resolution requirements, the pulse system needs to take into account the requirements of both narrow pulse and large bandwidth, which increases the difficulty of sign...

Claims

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