跳时超宽带无线电的性能分析

Performance analysis of time-hopping ultrawideband impulse radio

超宽带脉冲无线电是无线通信领域的一种全新技术,有着广阔的应用前景。它是一种基带无载波短脉冲,不同于使用正弦载波的传统通信系统。本文用满足FCC频谱规划的脉冲——高斯脉冲的五阶导数推导了TH-BPSK方式下的跳时超宽带扩频系统的误码与多址性能,并研究了多径对其性能的影响,比较了TH-BPSK与TH-PPM系统性能,分析结果表明TH-BPSK的性能(未考虑多径)明显优于TH-PPM,但是TH-PPM抗多径性能优于TH-BPSK。

Ultra Wideband impulse radio （UWB--1R）, a promising and novel radio technology, has a broad application prospect in wireless communication. In contrast with the conventional communication system using the ＇sine wave＇, UWB-1R is a baseband carrierless short pulse. Using the fifth-order derivative of the Gaussian pulse that satisfies the FCC spetral mask, we developed an error and multiple access performance for TH-BPSK UWB system and analyzed multipath effect on UWB system. Finally we compared TH-BPSK and TH-PPM. Theoretical analysis shows TH-BPSK performs better than TH-PPM when the multipath is ignored, but TH-PPM substantially outperforms TH-BPSK in multipath fading channels.