Wavelet packet transform based cme algorithm on interference excision in communication system

This paper proposed a novel approach of the wavelet packet transform based CME on interference suppression technology in Direct-Sequence Spread Spectrum system (DSSS). The algorithm is executed in three steps: First, we analyze the input signal by wavelet packet transform to appear the interference in the transform domain. Second, the CME algorithms complete the interference detection and delete interference bins. After the signal synchronization, we output the signal reconstruction to the receiver demodulation at last. The novelty of this algorithm is the combination of the wavelet transforms with CME in order to increase the accuracy and effect of interference suppression. The performance of this algorithm has been evaluated in different situations with variety RBW of narrowband interference. The simulation results indicate that the proposed algorithm with CME has good detection performance and that operates even when the interference bandwidth is relatively large. Performance is also compared to the intercept receivers that use other excision techniques.