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IEICE TRANSACTIONS on Communications

Constructing Quasi-Optimum GMW and M-Sequence Subfamilies with Minimized System Bit Error Rate

Xiao Hua CHEN, Tao LANG, Juhani OKSMAN

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Summary :

Either GMW sequence or m-sequence possesses a 2-valued auto-correlation function which helps to improve the performance of a RAKE receiver. However, their cross-correlation functions are less well controlled. Before they can be applied to a CDMA system, it is necessary to construct their sub-families (taking advantage of their large family size) which offer satisfactory cross-correlation functions. This paper studies several algorithms for constructing those quasi-optimum sub-families in terms of minimized bit error rate under co-channel interference. The study shows that the performance of resultant sub-families is sensitive to sub-family sizes and algorithms. A new criterion based on combined (even and odd) maximum cross-correlation for code selection is introduced, and highest-peak-deleting and most-peak-deleting algorithms are suggested for constructing quasi-optimum sub-families of GMW and m-sequences.

Publication
IEICE TRANSACTIONS on Communications Vol.E79-B No.7 pp.963-973
Publication Date
1996/07/25
Publicized
Online ISSN
DOI
Type of Manuscript
PAPER
Category
Communication Theory

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