一种用于超宽带通信系统的新型TH/DS-CDMA方案及其性能分析

M. Shayesteh, M. Nasiri-Kenari
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引用次数: 5

摘要

提出了一种基于跳时(TH)和直接序列(DS)扩频技术的超宽带(UWB)系统多址接入技术。在这种方法中,每个比特的持续时间被分成N/sub /帧,每个帧由N/sub /芯片组成。超正交编码器和PN序列的输出指定帧数,其中数据使用第二个PN序列以DS扩频形式传输。在接收端进行维特比解码前,我们考虑了带阈值的硬判决和软判决。我们评估了该方法的性能,并将其与传统的DS-CDMA系统进行了比较。结果表明,在与传统的DS-CDMA系统具有相同带宽的情况下,该方法具有最佳的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A new TH/DS-CDMA scheme for UWB communication systems and its performance analysis
We propose a new multiple access technique for ultra wide-band (UWB) systems based on time-hopping (TH) and direct sequence (DS) spread spectrum techniques. In this method, the duration of each bit is divided into N/sub s/ frames each one consisting of N/sub h/ chips. The outputs of a super-orthogonal encoder and a PN sequence specify the frame number, in which the data is transmitted in DS spread-spectrum form using the second PN sequence. We consider hard decision with threshold and soft decision before Viterbi decoding at the receiver. We evaluate the performance of the proposed method and compare it with the conventional DS-CDMA system. The results show that the proposed method has the best performance while it has the same bandwidth as the conventional DS-CDMA system.
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