In the broadband LFM signal digital pulse compression, the de-slope digital pulse compression method can effectively reduce the sampling rate, but it is limited by the delay difference between the target echo signal and the reference signal, and can only perform local pulse compression processing. At the same time, the delay difference between the target echo signal and the reference signal and the change of the target Doppler frequency have a certain impact on the de-slope digital pulse compression result. Through theoretical analysis and comprehensive simulation, this paper quantitatively analyzes the impact of the change of the delay difference between the target echo signal and the reference signal and the Doppler frequency in the de-slope digital pulse compression on the performance of digital pulse compression, and provides a reference for the reasonable selection of signal bandwidth, sampling rate and delay of the target echo signal in engineering applications. Keywords linear frequency modulation; de-slope processing; pulse compression; sampling rate; Doppler frequency In order to obtain high range resolution, radars generally transmit broadband or ultra-wideband signals, which brings great difficulties to data acquisition. Due to the limitations of the A/D device level and DSP operation speed, the sampling rate is often not too high. Therefore, the sampling rate should be reduced as much as possible under the premise of meeting the pulse compression performance indicators. This article discusses the use of de-slope digital pulse compression processing methods to reduce the sampling rate and reduce the amount of data, thereby increasing processing speed.
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