A direct sequence spread wavelet modulation method

Since wavelet transform has good time frequency property and orthogonality property, wavelet transform be used by communication as modulation waveforms. Based on the characterization of the wavelet modulation (WM) communication system and direct sequence spread spectrum communication (DS), this paper propose a novel wavelet modulation method, which is called direct sequence wavelet modulation (DS-WM). Making use of the joint estimation strategy, the performances of DS-WM are analyzed in three channel models. The experiment results show that the DS-WM has better performance than WM and the joint estimation strategy improves the bit error rate (BER) performance of DS-WM system.