| Citation: | Baoliang ZHOU. Distributed Coherent Radar LFM Wideband Stretch Parameter Estimation Method[J]. Journal of Electronics & Information Technology, 2020, 42(7): 1566-1572. doi: 10.11999/JEIT190398
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Wideband distributed coherent radar technology can effectively improve the target measurement accuracy and recognition performance, and has important research value. For the existing radar equipment generally does not have the ability to stretch the positive and negative frequency modulation rate wideband LFM signal simultaneously, that is the problem that the delay phase value of wideband signal transmit coherent can not be obtained by wideband stretch method in receive coherent synthesis phase. This article uses the delay difference between the unit radar and the target, equivalents the unit radar transmitting wideband LFM signal to the target signal, performs cross-correlation processing on the received signal to obtain the value of transmit coherent parameter. Through modeling and simulation receiving coherent and transmitting coherent synthesis processing are realized, and the two input single output coherent detection test of the aircraft target is carried out, and the ideal test results are obtained. The method has the advantages of high estimation accuracy, small calculation amount and good real-time performance, can be applied to distributed coherent radar engineering implementation.
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