Doppler ambiguity analysis and suppression for LTE-based passive bistatic radars  

作　　者：Luo ZUO Jun WANG Gang CHEN 

机构地区：[1]National Laboratory of Radar Signal Processing,Xidian University,Xi’an 710071,China

出　　处：《Frontiers of Information Technology & Electronic Engineering》2021年第8期1140-1152,共13页信息与电子工程前沿（英文版）

基　　金：Project supported by the National Key Laboratory Fund(No.6142411183302)。

摘　　要：In this study,we provide a detailed analysis of the frequency division duplex long term evolution downlink(FDD LTE DL)signal for passive bistatic radars that use the signal as an illuminator of opportunity.In particular,we analyze the crossambiguity function and illustrate its undesired deterministic peaks in the Doppler dimension due to the specific structure of the FDD LTE DL signal.A new adaptive mismatched filtering method is proposed for pre-processing the original reference signal to suppress these undesired deterministic peaks in the range-Doppler processing.The effectiveness of our proposed method is demonstrated via simulations following robustness analysis,showing that all undesired peaks are suppressed below-40 dB,with only 1.7 dB reduction in the main peak.

关 键 词：Passive bistatic radar(PBR) Long term evolution(LTE) Doppler ambiguity Range-Doppler processing 

分 类 号：TN929.5[电子电信—通信与信息系统] TN95[电子电信—信息与通信工程]