An Approach to Doppler Compensation of NLFM Pulse Compression
Bing Yue · Informatization Research · 2009
NLFM signal has advantage of LPI and its pulse compression has the advantage of low SNR loss.But its performance of PSL is sensitive to Doppler,so the detection of a small target beside a strong one will suffer from it.Based on analysis of the common processing procedure of the PD radar and by exchanging the order of PC and FFT,the coefficient of PC is calibrated in every Doppler bank,which significantly reduces the sensitivity of PSL to Doppler.According to simulation results,this approach can effectively improve the PSL of NLFM pulse compression with changing of the Doppler frequency,and can decrease the loss of SNR of pulse compression.The computation of this approach is small and it can be realized in real time.