线性调频信号检测中时频谱交叉项的抑制

Cross-Term Control of Time-frequency Analysis in LFM Signal Detection

在多分量线性调频信号检测时,由于时频谱存在的交叉项影响到检测精度,进行时频谱的平滑可以减少交叉项,使用时频谱重排的方法在减少交叉项的同时又可以增加谱的聚集性。计算机仿真实验结果验证了这两种方法可以有效地抑制交叉项干扰,提高了检测精度。

is a broadly applied nonstationary signal. The problem caused by cross-terms prevents detectiol; precision in the multi-component LFM signal. The introduction of smoothing functions cgn reduce the effect of cross-terms and the reassigned method can increase the concentration of results. In this paper, the reassigned smoothed pseudo Wigner-Ville distribution is to LFM signal detection. Computer simulation results show its effectivity.