多载频相位编码雷达信号分析

Analysis on Multi-carrier-frequency Phase-coded Radar Signal

由于多载频信号在高分辨率,低截获等方面的优势以及适应未来雷达多功能的要求,近年来备受关注。针对多载频相位编码信号,以模糊函数为工具,对其与单载频相位编码信号进行了比较,证明其具有更佳的雷达探测性能。针对直接匹配滤波运算量较大的问题,提出先对子载频相位编码序列匹配滤波,再通过子带合成完成二级脉压的信号处理方式。仿真分析证明,该方式可获得与直接匹配滤波相近的效果。

The multi-carrier-frequency signal （ MCPC） has attracted much more attentions recently since its advan-tageous in high resolution and low probability of interception and suitable for meeting multifunction requirement for future radar. By taking ambiguity function as a tool, a comparison between multi-carrier-frequency and single-carri-er-frequency phase-coded signals shows that the multi-carrier-frequency phase-coded signal has a better performance in radar detection. To deal with the problem of larger operand of directly matched filtering, a signal processing method of firstly performing matched filtering for sub-carrier-frequency phase-coded sequence, and then implemen-ting two-stage pulse compression via subcarrier-frequency band synthesizing is presented. The simulation analysis shows that using this method can get effect similar to that of using direct matched filtering.