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Multiple-access interference reduction for QS-CDMA systems with a novel class of polyphase sequences

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4 Author(s)
Seong Ill Park ; Telecommun. R&D Center Inf. & Commun. Bus., Kyunggi, South Korea ; So Ryoung Park ; Iickho Song ; Suehiro, N.

In this paper, a new class of polyphase sequences for CDMA systems and its generation method are suggested, and the correlation properties of the sequence are investigated. The performance of the sequence in quasi-synchronous CDMA (QS-CDMA) systems is investigated under a frequency-selective, time-nonselective, slow Nakagami fading channel with additive white Gaussian noise (AWGN). It is shown that the performance of the QS-CDMA systems using the suggested sequence is independent of the number of users and is much better than that using the PN sequence

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Information Theory, IEEE Transactions on  (Volume:46 ,  Issue: 4 )