线性调频和巴克码组合调制雷达信号性能分析

由于单一调制的低截获雷达信号很容易被敌方截获接收机截获，从信号波形出发，本文提出来一种脉内线性调频、脉间7位巴克码（LFM-Barker）组合调制的低截获雷达信号波形。通过理论推导与数值仿真，分析了该组合调制雷达信号的时频域信号形式，时频域匹配处理特性，模糊函数，时移频移联合参数估计以及低截获特性。结果表明，LFM-Barker组合调制雷达信号具有好的时频特性，高的距离与速度分辨率，提高了雷达信号的低截获性能。

Performance analysis of hybrid radar signal modulation of linear frequency and barker phase coded modulation

For the problem that the simple modulated radar signal can be easily intercepted by electronic reconnaissance equipment in modern electronic war,a hybrid radar signal composed of LFM and 7 bit Barker phase coded signal is proposed. By the theoretical deduction and computer simulation, the signal form and characteristic in the time and frequency domain are discussed. The ambiguity function ,time and frequency joint parameter estimation and low probability of intercept features are also studyed. The results show that the hybrid radar signal has good characteristics in time and frequency domain ,high distance and velocity resolution and the improved intercept factor.