UWB的调制与多址技术

Ultra-Wide Bandwidth Modulation and Multiple Access Technology

超宽带无线电是通信领域的一种全新技术 ,有着广阔的应用前景。它是一种基带无载波短脉冲 ,不同于使用正弦载波的传统通信系统。在综合分析大量文献基础上 ,总结了目前UWB的几种调制方式与多址技术 ,并比较了TH -BPSK与TH -PPM系统性能 ,最后给出了两种情况的模拟结果 ,一种情况是在单用户BER =1E - 3时 ,用户数与ΔP的关系 ,另一种情况是在用户速率保持不变时 ,系统的BER与用户数的关系。

Ultra wideband impulse radio (UWB-IR), a promising and novel radio technology, has a broad application prospect in wireless communication. In contrast with the conventional communication system using the‘sine wave', UWB is a baseband carrierless short pulse. Based on the analysis of a great deal of technical reports on UWB radio, we not only present several kinds of modulation and multiple-access technology but also compare TH-BPSK and TH-PPM in terms of their multiple access performance and BER performance in AWGN. Finally we present the simulation results. The first case is the relationship between user number and under the condition that the single user BER is 1E-3. The second case is the relationship between BER and user number under the condition that user data rate is constant.