基于QAM-OFDM的雷达通信共享信号脉压PSLR分析  

Analysis on PSLR of pulse compression with radar communication shared signal based on QAM-OFDM

作　　者：杨勇军 梅进杰[1] 胡登鹏[1] YANG Yongjun;MEI Jinjie;HU Dengpeng(Air Force EarlyWarning Academy,Wuhan 430019,China)

机构地区：[1]空军预警学院,武汉430019

出　　处：《空军预警学院学报》2019年第1期25-28,32,共5页Journal of Air Force Early Warning Academy

基　　金：国家自然科学基金资助项目(61271451)

摘　　要：基于正交幅度调制-正交频分复用(QAM-OFDM)的雷达通信共享信号携带随机通信信息,导致其脉压旁瓣起伏随机性较大,进而造成其峰值旁瓣比(PSLR)随机性较大,影响雷达目标检测的虚警概率.对此,分析了PSLR随机性较大的原因,研究了通过长时间相参积累抑制PSLR随机性的可行性.理论分析和仿真结果表明,QAM-OFDM共享信号脉压的PSLR具有随机性,并且受调制阶数的影响较大;通过长时间相参积累使得QAM-OFDM共享信号脉压结果趋于均值,能有效抑制PSLR的随机性.The radar communication shared signal based on quadrature amplitude modulation(QAM)and orthogonal frequency division multiplexing(OFDM)carries random communication information,which leads to a more random pulse compression side lobe fluctuation,thus resulting in a more random peak side lobe ratio(PSLR),and affecting the false alarm probability of radar target detection.In this regard,the paper analyzes the reason for the large randomness of PSLR,and studies the feasibility of inhibiting PSLR randomness through long-term coherent integration.Theoretical analysis and simulation results show that the PSLR of pulse compression with QAM-OFDM shared signal has randomness and is greatly affected by the modulation order,and that the long-term coherent integration makes the pulse compression of QAM-OFDM shared signal result tend to mean,which can effectively suppress the randomness of PSLR.

关 键 词：正交幅度调制 正交频分复用 雷达通信共享信号 峰值旁瓣比 

分 类 号：TN957[电子电信—信号与信息处理]