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Characteristics of M-Ary/Spread Spectrum Multiple Access Communication Systems Using Co-Channel Interference Cancellation Techniques

Shin'ichi TACHIKAWA

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Summary :

This paper proposes M-ary/SSMA using co-channel interference cancellation techniques and presents comparisons with conventional DS/SSMA and other systems. First, ideal models of DS/SSMA and M-ary/SSMA using co-channel interference cancellation techniques are analyzed. In the cancellation circuit of DS/SSMA, when an error bit of other user's data arises, the received signal is degraded by "voltage addition" of the error sequence. While, in M-ary/SSMA, it is degraded by only "power addition" of the error code. Therefore, though the circuits are complicated, bit error rate of the proposed system can be improved considerably. Further, improvement of spectral efficiency in these systems are shown for several bit error rate and chip waveforms.

Publication
IEICE TRANSACTIONS on Communications Vol.E76-B No.8 pp.941-946
Publication Date
1993/08/25
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Issue on Spread Spectrum Techniques and Applications)
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