Radar signal real-time detection method

Abstract

The invention relates to a radar signal real-time detection method. The method is characterized by comparing an average amplitude of N sampling points before a certain moment with the amplitude of thesampling point at the moment, and if the amplitudes of the plurality of sampling points after starting of the certain moment are continuously a certain value higher than the average amplitude in a previous certain period of time, considering that a signal rising edge exists at the moment; otherwise, if the amplitudes of the plurality of continuous sampling points after a certain moment is startedare a certain value lower than the previous average amplitude, considering that a falling edge exists at the moment; and when both the falling edge and the rising edge exist, intercepting a signal part existing in data immediately. Whether a signal exists is detected in a mode of judging the rising edge and the falling edge in a time domain, and an effect of detecting the signal in real time under a passive condition can be achieved by setting reasonable parameters and thresholds.

Description

Technical field [0001] The invention relates to the field of radar technology, in particular to a method for real-time detection of radar signals. Background technique [0002] Traditional radar detection first needs to perform pulse compression processing on the echo signal, and convolve the echo signal with the reference signal. In actual processing, we usually perform FFT (Fast Fourier Transformation) calculation on the collected echo signal and reference signal, multiply the two frequency domain signals, and then perform IFFT (Inverse Fast Fourier Transformation) calculation to obtain the pulse pressure result. After deduction, the signal s after pulse pressure can be obtained 0 (t) is: [0003] [0004] It can be seen that the pulse pressure signal has a peak in the time domain, and the echo signal can be detected by setting the reference unit and the protection unit to detect whether the peak exists. However, this CFAR detection requires post-processing of the received sign...

AI Technical Summary

Problems solved by technology

However, this kind of CFAR detection requires post-processing of the received signal. All the signals must be received first, and then FFT processing is performed. The value of any point of the signal after the pulse pressure is not only related to the current sampling point, but also related to the subsequent The sampling points are related, so the effect of real-time detection cannot be achieved

The second is that the reference signal needs to be known in advance and cannot be used under passive conditions

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