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Superiority of Phase-Shift-Free M-Phase Spreading Sequences of Markov Chains

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2 Author(s)
Fujisaki, H. ; Graduate Sch. of Natural Sci. & Technol., Kanazawa Univ. ; Sugimori, H.

We consider the optimum spreading sequences of Markov chains in terms of the mean value of the limit of variance of the real part of the normalized MAI (multiple-access interference) for asynchronous SSMA (spread spectrum multiple access) communication systems. We first define a novel class of spreading sequences, namely the phase-shift-free M(ges3)-phase spreading sequences. Then we theoretically and experimentally show that the optimum phase-shift-free M-phase spreading sequences of Markov chains are superior to the optimum binary spreading sequences of Markov chains in terms of the bit error probabilities based on the CLT (central limit theorem) for periods N>5

Published in:

Spread Spectrum Techniques and Applications, 2006 IEEE Ninth International Symposium on

Date of Conference:

28-31 Aug. 2006