Signal processing method and signal processing equipment of step frequency radar and computer readable storage medium

By adopting a sawtooth wave signal processing method with frequency stepping in step frequency radar, combined with FFT transformation and CFAR processing, the problem of difficulty in accurately obtaining the target distance and speed in the prior art is solved, and efficient detection of multiple dynamic and static targets is achieved.

CN119828126APending Publication Date: 2025-04-15SHANGHAI BAOLONG AUTOMOTIVE CORP
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Patent Information

Application Number
CN202411963740.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2025-04-15

AI Technical Summary

Technical Problem

When the existing step frequency radar processes moving targets, it is difficult to accurately obtain the distance and speed of the target, and the calculation amount is large, it is greatly affected by data stability, it is prone to errors in inter-frame data correlation, and has relatively large estimation errors.

Method used

The signal processing method of stepping frequency radar is adopted to transmit the sawtooth wave with frequency stepping, and the real distance and speed of the target are calculated at the receiving end through FFT transformation and CFAR processing of distance dimension and velocity dimension.

Benefits of technology

Effectively obtaining the distance and speed of the target, it is suitable for detection of multiple dynamic and static targets, reducing the computing volume and dependence on data stability, and improving the accuracy and reliability of the detection.

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Abstract

The invention relates to a step frequency radar signal processing method, a step frequency radar signal processing device and a computer readable storage medium. The signal processing method comprises the following steps: S1, sampling M points in the time width of each chirp signal, wherein the total number of sampling points is M * N; generating a two-dimensional array x (i, j); s2, carrying out distance dimension FFT (Fast Fourier Transform) on the two-dimensional array x (i, j); carrying out FFT (Fast Fourier Transform) of a speed dimension; s3, accumulating Mag values of the converted signals; s4, performing CFAR processing on the accumulated signal to obtain a peak target, wherein k targets are arranged; s5, calculating the phase difference of the signals at the position index k, and calculating the real Doppler of the target at the position index k; s6, calculating the real distance of the target at the position index k; and S7, calculating the real speed of the target at the position index k. The distance and the speed of the target can be effectively obtained.
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