Groupwise Successive Interference Cancellation Receiver with Gradient Descent Search for Multi-Rate DS-CDMA System

Seung Hee HAN  Jae Hong LEE  

IEICE TRANSACTIONS on Communications   Vol.E87-B    No.4    pp.1019-1024
Publication Date: 2004/04/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technology
multi-rate,  DS-CDMA,  GSIC,  gradient descent search,  multi-user detection,  

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In this letter, we propose a groupwise successive interference cancellation (GSIC) receiver with gradient descent search for multi-rate DS-CDMA system. Proposed receiver incorporates iterative gradient descent search algorithm into conventional GSIC receiver for multi-rate DS-CDMA system. It is shown that the receiver achieves significant performance improvement over the matched filter (MF) receiver, GSIC receiver, multi-stage parallel interference cacnellation (PIC) receiver, multi-stage partial PIC receiver, and GSIC receiver with PIC in a Rayleigh fading channel.