Performance enhancement of DS/SS system using chaotic spreading sequence
使用混沌扩频序列增强DS/SS系统性能

In this paper,a chaotic sequence generator based on Logistic map and interleaver was proposed and used to generate spreading sequence.The generated chaotic sequence is balanced itself and has excellent correlation property and sidelobe property.When the sequence is applied to Direct Sequence/Spread Spectrum(DS/SS) system,Multiple Access Interference(MAI) can be mitigated by using the spreading sequences.The system capability and performance can be enhanced,and the information can be effectively encrypted.The Bit-Error Rate(BER) performance of spreading sequence from the proposed chaotic sequence generator was compared with that of the conventional m-sequence and Gold sequence.Results show that the new sequence has a noticeable improvement in BER performance in low Signal-toNoise Ratio(SNR).