DSSS系统LFM干扰抑制技术研究

摘要

Considering the fact that the traditional Fourier transform has good suppression ability for the stationary jamming signal but not for the nonstationary LFM jamming signal,the paper introduces FRFT with the purpose of solving this problem.By using an algo%针对传统的傅里叶变换只能对平稳干扰信号具有较好的抑制能力而对非平稳的LFM干扰信号不能有效抑制,该文引入了分数阶傅里叶变换（FRFT）,在分数阶傅里叶域给出了一种LFM信号最佳旋转角度确定的算法,并利用该算法对LFM在分数阶傅里叶域进行干扰抑制。仿真结果表明,该算法能够准确确定LFM信号在分数阶傅里叶域的最佳旋转角度,从而有效抑制LFM干扰。