不同调制的并扩超宽带通信系统的性能研究

以采用TH MPAM调制和TH MPPM调制的并扩超宽带通信系统为研究对象,对两种调制的并扩超宽带通信系统的性能进行综合研究与对比分析。在并扩超宽带通信系统结构的基础之上,对两种调制的并扩超宽带信号的解调误符号性能、并扩信号的解并扩性能和系统总比特误码性能分别进行了研究和仿真分析。由仿真结果可知,由于TH MPAM信号解调时多值符号差错概率的不平衡特性和并扩信号的非等概特性相匹配,可保证系统获得良好的解并扩性能,所以系统的比特误码性能优于采用TH MPPM调制的系统比特误码性能。

Performance studies of different modulation of UWB communication system based on parallel combinatory spread spectrum

This paper studied on the UWB communication system based on parallel combinatory spread spectrum PCSS UWB of TH MPAM modulation and TH MPPM modulation, and gave the studies and contrast analysis. On the foundation of the structure of PCSS UWB communication system, the symbol error rate of demodulation, performance of de-spread and bit error rateBER of the system were analyzed and simulated. And the results show that the BER performance of the system of TH MPAM mode is better than that of TH MPPM, because of the matching of the imbalance of multivalued symbols demodulation and non-equal probability of the parallel combinatory spread spectrum signals, which could ensure the performance of de-spread.