UWB多径信道调制方式的误码率分析

为了研究Ultra-Wideband(UWB)系统中可分辨多径分量和不可分辨多径分量携带信号的误码率问题，利用Radio Activated Key Entry(RAKE)接收机的分集技术，在信号发射端分别采用 Binary Phase Shift Keying (BPSK)和Pulse Position Modulation(PPM)调制方式，从这2种调制方式的解析式入手，推导出BPSK与PPM在可分辨和不可分辨多径分量下误码率表达式，并针对在相同叉指数和信噪比下，分别对这2种多径分量信号在不同调制方式下的误码率进行仿真分析.仿真结果表明，在相同调制方式下，可分辨多径的抗误码率性能要优于不可分辨多径的情况.而且，采用BPSK调制无论是可分辨多径还是不可分辨多径，在抗误码率性能上，均优于PPM调制方式.

UWB Multipath Channel Modulation Mode Analysis of the Bit Error Rate

In order to study the problem that Ultra-Wideband (UWB)system can distinguish the multipath components and indiscernibility more carrying signals, Rake receiver diversity technology is used. In the signal transmitter, Binary Phase Shift Keying (BPSK) and Pulse Position Modulation (PPM) modulation method are used respectively. From the analytic expression of these two kinds of modulation mode，elicit BPSK and PPM in the resolvable multipath and indiscernibility multipath error rate expression are induced. For the same fork index and signal-to-noise ratio，two kinds of multipath component signals under different modulation mode of simulation analysis are conducted. The simulation results show that，under the same modulation mode，distinguish the multipath error rate resistance is superior to the indiscernibility multipath situation. No matter in distinguish multipath or indiscernibility multipath, BPSK modulation is superior to PPM modulation method on resistance error rate.