线性调频和巴克码组合调制雷达信号性能分析

Performance Analysis of Hybrid Radar Signal Modulation of Linear Frequency and Barker Phase Coded Modulation

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,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。

Fothe problem thathe simple modulated radasignal can be easily intercepted by electronirecon- naissance equipmenin modem electroniwar. hybrid radasignal composed of LFM and 7 biBarkephase co- ded signal iproposed. By the theoretical deduction and computesimulation, the signal form and characteristiin the time and frequency domain are discussed. The ambiguity function, time and frequency joinparameteestima- tion and low probability of intercepfeatureare also studyed. The resultshow thathe hybrid radasignal hagood characteristicin time and frequency domain ,high distance and velocity resolution and the improved intercepfac- tor.