LFM Interference Suppression in DSSS Systems using Wavelet Packages Transform

摘要

The Linear Frequency Modulation (LFM) signal is analized in wavelet domain, and a Wavelet packet Transform based Time Frequency Cell Nulling (WPT-TFCN) algorithm for LFM interference suppression is proposed. Because the algorithm makes full use of the time frequency localization feature of the WPT, the signal distortion is minimized when the interference is Nulled. Simulation results show that the proposed algorithm is superior to the WPT based sub-band nulling algorithm.