多径信道上DS-CDMA系统扩展序列子集的选择

2005 5th International Conference on Information Communications & Signal Processing Pub Date : 2005-12-06 DOI:10.1109/ICICS.2005.1689304

S. Xie, Z. Gu, S. Rahardja, J. C. Wong, Y. Xin

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引用次数: 1

摘要

直接序列码分多址(DS-CDMA)系统的性能在很大程度上取决于所使用的扩频序列的相关特性。给定一组序列，因此选择一个适当的子集以获得最佳性能是很重要的。针对多径衰落信道下的同步和异步DS-CDMA系统，在多径强度分布(MIP)已知的情况下，分别给出了两种新的序列子集选择准则。仿真结果表明，基于所提选择准则的序列子集比基于均方相关选择准则的序列子集具有更好的误码率性能

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Selection of Spreading Sequence Subsets for DS-CDMA Systems over Multipath Channels

The performance of a direct-sequence code division multiple access (DS-CDMA) system is largely dependent on the correlation properties of the spreading sequences in use. Given a set of sequences, it is thus important to select an appropriate subset for optimal performance. In this paper, two new selection criteria of sequence subsets are given for synchronous and asynchronous DS-CDMA systems over multipath fading channels respectively when the multipath intensity profiles (MIP) are known. Simulation results show that subsets of sequences based on the proposed selection criteria can provide better bit-error rate (BER) performance than those based on the existing mean-square correlation selection criteria

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2005 5th International Conference on Information Communications & Signal Processing

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