M-ary nonsinusoidal spread spectrum modulation method base on orthogonal coded sequences

Based on orthogonal coded sequence sets，an Mary nonsinusoidal orthogonal spread spectrum modulation method in time domain is proposed for enhancing the bit error rate performance and increasing the antiinterference performance.By the means of theoretical deduction and analysis，the bit error rate performance on the additive White Gaussian noise(AWGN) channel and the spectrum efficiency is analyzed.The results show that the proposed method can enhance the bit error rate performance and increase the antiinterference performance efficiently.