并行组合扩频超宽带系统调制方法及性能分析

Modulation mode and performance analysis of uwb communication system based on parallel combinatory spread spectrum

摘要:

为提高超宽带系统的抗干扰性能,在分析并行组合扩频通信和超宽带通信系统技术特征的基础上,结合这两种通信方式的技术优势,提出一种基于并行组合扩频的超宽带（PCSS-UWB）通信系统方案,并将高性能的MBOK调制方式应用到该系统. 文章定性分析了基于PCSS-UWB通信系统性能与频带利用率关系,得出系统性能与并行组合扩频技术每次所能传输信息数据比特数有关的结论. 仿真结果表明,当误码率为10-4时MBOK调制方式较传统的PPM调制方式的信噪比有约9 dB的提高.

Abstract:

To improve the anti-interference performance of UWB communication system, a new UWB communication system based on parallel combinatory spread spectrum is proposed after analyzing the characteristics of UWB and PCSS. The application of M-ary bi-orthogonal keying (MBOK) modulation in the new system is also discussed. In this paper, qualitative analysis is made to analyze the relationship between the system performance and band efficiency, and conclusion is got that the performance of PCSS-UWB communication system is related with the number of the transmission data in PCSS technology. Simulation shows that E_b/N_o is improved 9 dB in the system with MBOK modulation than that in the system with PPM modulation when BER is 10-4.