调频线性度对线性调频信号性能影响分析

Effects of FM linearity on the performance of LFM signals

针对去调频和脉冲压缩两种不同的处理方式,深入研究了线性调频信号调频线性度对信号性能的影响,得到LFM信号带宽越大,误差频率越低,对线性度要求越高的结论,且在相同边带抑制的条件下,去调频处理比脉冲压缩处理对LFM信号线性度的要求大约提高了一倍。仿真结果验证了理论分析的正确性。

The effects of FM linearity on LFM signals are studied based on deramp and pulse-compression processing. It is shown that higher FM linearity is needed with the increase of the sinai bandwith and decrease of the frequency of phase error. With the same paired sidebands, twice FM linearity is needed by using deramp processing method compared with pulse-compression processing method. The simulation result proves the conclusions.