并行组合扩频通信扩频序列的优选

Optimized Selection of Spread Spectrum Sequence for Parallel Combinatory Spread Spectrum Communication

并行组合扩频通信相对传统扩频通信具有更高效,更安全的优势。但是由于并行通道间存在互干扰,降低了系统的传输可靠性。为了提高并行组合扩频通信系统的性能,需要从备选的扩频序列中优选出合适的扩频序列来组成扩频序列集用于信息映射。通过分析并行组合扩频通信的通信原理,从减小接收端各支路互相关干扰的角度提出了一种扩频序列的优选方法。仿真结果表明,采用该方法能够有效地降低系统的误码率,提高系统的可靠性。

Compared with traditional spread spectrum communication system, parallel combinatory spread spectrum communication system is of more superiorities in efficiency and security. However, the interference between the parallel channels could reduce the transmission reliability of the system. In order to improve the performance of parallel combinatory spread spectrum communication system, suitable spread spectrum sequences for data-sequence mapping should be selected from the alternative spread spectrum sequences. Based on analyzing the principle of parallel combinatory spread spectrum communication and for reducing the cross correlation of the receiving terminal, a method for optimizing the selection of the spread spectrum sequences is proposed. The simulation results show this method could effectively reduce the bit error rate of the system and thus improve the reliability of the system.