Generation of perfect orthogonal complementary codes for their applications in interference-free CDMA systems
Generation of perfect orthogonal complementary codes for their applications in interference-free CDMA systems
复制标题
DOI：
10.1109/pimrc.2004.1370967
复制
发表时间：
2004-12
期刊：
影响因子：
--
通讯作者：
Hsiao-Hwa Chen;Hsin-Wei Chiu
中科院分区：
文献类型：
--
作者：
Hsiao-Hwa Chen;Hsin-Wei Chiu
介绍了一种生成适合于无干扰码分多址应用的最佳互补(PC)码超集的代数方法。本文提出的码设计方法考虑了实际应用中的主要损害因素，例如多址干扰、多径效应、异步上行链路传输和连续符号中的随机符号。通过本文的分析，得出了两个重要结论。首先，除非使用适当的互补码集，例如本文提出的PC码集，否则永远不可能实现无干扰的码分多址。其次，为了实现无干扰的码分多址操作，必须使PC码的群组大小等于它们的集合大小。这样产生的码集可以应用于实现新的码分多址结构，从而提供仅受噪声限制的性能。
This paper introduces an algebraic approach to generate the super-set of perfect complementary (PC) codes suitable for interference-free CDMA applications. The code design methodology proposed herein takes into account major impairing factors in real applications, such as MAI, multipath effect, asynchronous uplink transmissions and random signs in consecutive symbols. Two important conclusions are drawn by the analysis given in this paper. First, implementation of an interference-free CDMA will never be possible unless using proper complementary code sets, such as the PC code sets proposed in this paper. Second, to enable interference-free CDMA operation, the flock size of the PC codes must be made equal to their set size. The so generated CDMA code sets can be applied to implement a new CDMA architecture offers a. performance limited only by noise.