室内UWB能量收集MLSE均衡算法的BER性能分析

给出了高速率室内UWB系统基于积分窗口能量收集算法的理论分析框架.首先得到等效信号接收模型,再使用MLSE均衡消除ISI.从等效接收信号模型可以看出,ISI干扰呈非对称的特点,其主要原因在于积分窗口的长度是信道扩展延迟的一部分,这样ISI之前的干扰比特个数大于之后的比特干扰个数.使用Viterbi算法进行MLSE,仿真结果表明,MLSE均衡基本可以消除ISI影响,达到接近无ISI的性能.

BER Performance Analysis of Energy Collection Algorithm with MLSE Equalization For Indoor UWB

The theory analysis framework of energy collection algorithm based integral window of high data rate indoor UWB system is derived. First, equivalent signal receiving model is given, then MLSE equalization algorithm is adopted to eliminate the effects of ISI. From equivalent signal receiving model, ISI appears non-symmetry character whose main reason lies in that the length of integral window is a part of the channel spread delay, and the number of interferences bits in front of the expected data bit is great than the number of interferences bits behind the expected data bit. Simulation results indicate that by performing MLSE equalization using Viterbi algorithm the effects of ISI can be eliminated basically and the performance is close to the case without ISI.