RESEARCH ON PERFORMANCE INFLUENCE OF DIRECT-PATH SIGNAL FOR DVB-S BASED PASSIVE RADAR  

作　　者：Jin Wei Lü Xiaode Xiang Maosheng 

机构地区：[1]National Key Laboratory of Science and Technology on Microwave Imaging,Institute of Electronics,Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Journal of Electronics(China)》2013年第2期111-117,共7页电子科学学刊（英文版）

摘　　要：Passive radar detects moving targets by Cross Ambiguity Function (CAF), which is based on the cross correlation process of the direct-path signal in reference channel and echo signal in receive channel. Thus, the performance of direct-path signal is important to system performance for this type of radar. While the Signal to Noise Ratio (SNR) of direct-path signal is low, it will deteriorate the detection performance. In this paper, how SNR of direct-path signal induces degradation on the SNR of CAF, and how the integration gain affects by integration time are analyzed, both with theoretical analysis and numerical simulation, which are valuable for the R&D of passive radar.Passive radar detects moving targets by Cross Ambiguity Function （CAF）, which is based on the cross correlation process of the direct-path signal in reference channel and echo signal in receive channel. Thus, the performance of direct-path signal is important to system performance for this type of radar. While the Signal to Noise Ratio （SNR） of direct-path signal is low, it will deteriorate the detection performance. In this paper, how SNR of direct-path signal induces degradation on the SNR of CAF, and how the integration gain affects by integration time are analyzed, both with theoretical analysis and numerical simulation, which are valuable for the R＆D of passive radar.

关 键 词：Passive radar Cross Ambiguity Function (CAF) Signal to Noise Ratio (SNR) loss Range walk Doppler walk 

分 类 号：TN958.97[电子电信—信号与信息处理]