Hermite脉冲超宽带系统在多径信道的性能分析

研究了一种基于Hermite脉冲的超宽带系统在多径信道下的性能。考虑到定时抖动对Rake相关接收的影响,通过Hermite脉冲的相关函数可以计算Rake捕获的信号能量,进而得到接收机的输出信干比。在假设符号间干扰为高斯噪声下,得出系统在多径信道下的理论误比特性能。结果表明,符号间干扰能量对Rake接收机合并路径数目的变化并不敏感;增加合并路径数目可以提高系统的误比特性能;大的定时抖动范围会造成系统性能下降。

Performance Analysis of Hermite Pluses Based Ultra Wideband System in the Multipath Channel

This paper analyses the performance of a Hermite pluses based Ultra Wideband system in multipath channels.Base on correlation function of Hermite pluses,the captured energy of Rake is derived considering the impact of timing jitter on the Rake receiver.The output signal to interference and noise ratio is deduced.Theoretical bit error ratio (BER) performance is represented under Gaussian approximation.Both theoretical analysis and simulation show that the energy of intersymbol interference is insensitive to the number of Rake fingers;the larger number of Rake fingers leads to a better BER performance;and the larger timing jitter range brings on the increased probability of error.