AWGN信道下TH-PPM UWB通信系统性能分析与仿真

Performance Analysis and Simulation of a TH-PPM UWB Communication System in AWGN Channel

首先介绍了TH-PPM UWB信号,然后从理论上对加性高斯白噪声(AWGN)信道下系统的性能进行了分析,包括误码率分析和系统容量分析,最后对系统的误码率和接入用户数进行了仿真比较。结果表明,重复码长度、脉冲重复时间和用户数目的选取对系统的误码率都有较大的影响,同时,系统容量与输出信噪比和数据传输速率有关并趋于定值。

The TH -PPM signal is introduced first, then the system performance in AWGN channel is analyzed theoretically, including the bit -error rate（BER） and the system capacity. Finally, the numerical resuits of BER and the access number of users are presented and compared. The studies indicate that the choice of the length of the repetition code, the pulse repetition time and the number of users has great influence on system BER. At the same time, the system capacity has relations with the output SNR and the data transmitting rates, and will lead to a constant.