超宽带Rake接收机的性能分析

超宽带信号经多径信道传播会产生严重的时间弥散，采用Rake接收是提高超宽带接收机性能的重要手段。文中首先介绍了加性高斯白噪声信道模型和IEEE802．15．3a标准信道模型。通过比较分析几种典型调制的超宽带冲激无线电信号的最佳接收机，推广到Rake接收机的性能分析。重点分析并仿真了不同信道、不同调制方式、不同判决方式、不同合并方式、不同速率的情况下Rake接收机的性能。

Performance analysis of UWB Rake receiver

In multipath channel,ultra-wide band signals suffer from severe time dispersion.Rake reception is an important way to boost the performance of ultra-wide band receivers.This paper introduces AWGN channel model and IEEE802.15.3a channel model firstly.On the basis of AWGN channel,it researches the optimum receiver with several different typical modulating Impulse Radio Ultra-Wide Band(IR-UWB) signals comparatively.The outcome can be extended to the Rake receiver.This paper discusses intensively the performance of Rake receivers,under different circumstances,such as different channels and different decision modes,varied modulation,altered manner of incorporation as well as diverse bit speed.