New Optimized Selection Algorithm of Chaotic Spread-spectrum Sequences

Chaotic sequence with its good correlation performance being sensitive to initial condition and hard to decrypt is used as spread-spectrum code in Direct Sequence Code Division Multiple Access(DS/CDMA) system.In order to improve the security of DS/CDMA system and decrease the multiple access interference,the traditional optimized selection algorithm of chaotic sequence is improved.By studying the chaotic cross-correlation optimization,a new cross-correlation optimized selection algorithm of chaotic spread-spectrum sequence is proposed,and the performance of the optimized sequence is simulated and compared.Experimental results show that the algorithm has better correlation performance,larger capacity and lower multiple access interference.