基于Pulsed-OFDM的UWB系统的设计与优化

Design and Optimization of UWB System Based on Pulsed OFDM

对802.15.3a工作组为UWB WLAN提出的多频带OFDM-UWB系统在MATLAB环境下用IEEE信道发布的UWB信道模型进行了仿真,提出了一种改进的多频带Pulsed-OFDM系统(POFDM UWB)。对系统进行了分析比较;并通过采用合并技术减少了误码率,提高了系统的性能;采用跳时技术解决了系统多用户接入和系统参数的选取。仿真结果表明,该系统在误码率小于10-5、误分组率小于8%的情况下可以工作在9.6 m的距离。

A complete simulation of the traditional OFDM-UWB system was run over the channel models described in the UWB channel model sub-committee of 802. 15. 3a. Then the Pulsed- OFDM systems are proposed, the systems are further studied and compared. Also, the merging technology is used to reduce the code error rate and to improve the system performances; and time hopping technology is adopted to resolve the problem of the multFuser access and the system parameter selection. The simulation results indicate that the system can work in the distance of 9.6 m in the case of the code error rate of less than 10^-5and the PER of less than 8%.