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A Two-Stage Approach with CMA and ILS to Blind Multiuser Detection
Go NAKANISHI Koji SHIBATA Takakazu SAKAI Atsushi NAKAGAKI
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/10/01
Print ISSN: 0916-8508
Type of Manuscript: Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Spread Spectrum Technologies and Applications
digital mobile communication, DS-CDMA, blind multiuser detection, LCCM and ILS algorithms,
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Multiple access interference (MAI) due to many simultaneous users is the main factor that limits the performance of DS-CDMA system. Multiuser detection is a method to avoid performance degradation due to MAI. We propose a blind multiuser detection method based on the algorithm consisting of two-stage decoding process, i.e., linearly constrained constant modulus (LCCM) and iterative least squares (ILS). The computer simulations confirmed that the algorithm is near-far resistant and that the proposed method is effective in the application to the slow fading channels.