UWB系统的一种改进型伪混沌跳时多址接入技术

对于伪混沌跳时多址接入系统,混沌映射关系和多址接入调制方式对系统的性能均有影响.当参数设置一致时,双帐篷(double-tent)映射是贝努里(Bernoulli)映射进行伪混沌跳时多址接入时数据传输速率的两倍;当速率一致时,前者的系统误码率更低.本文对双帐篷映射伪混沌跳时的跳时调制多址接入方式进行改进,采用二进制相移键控(BPSK)调制,得到的多址接入系统误码性能更好.这种改进型多址接入系统与贝努里映射的伪混沌跳时多址接入系统相比,不仅改善了系统误比特率,还提高了数据传输速率.

An improved pseudo-chaotic time hopping scheme for UWB multiple access

Both the chaotic mapping scheme and multiple access modulation have great effect on the performance of pseudo-chaotic time hopping system. The double-tent ma Phas twice data rate of Bernoulli shift ma Pwith the same parameter setting, while it has a better bit error rate (BER) performance than the Bernoulli shift ma Pwithin the same data rate. In this paper, we improve the double-tent ma Ppseudo-chaotic time hopping in using BPSK modulation, instead of time-hopping (TH) modulation, and this manipulation provides a better BER performance. We provide the analysis of the improvement of the BER performance and validate it by simulation. Compared to the system of Bernoulli shift ma Pwith TH modulation, the improved system provides a better BER performance and increases the data rate.