Performance of SUD and MUD Interference Cancellation Receivers in Single-Cell and Multi-Cell CDMA Systems

Jonas KARLSSON  Hideki IMAI  

Publication
IEICE TRANSACTIONS on Communications   Vol.E86-B   No.10   pp.2996-3003
Publication Date: 2003/10/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
Keyword: 
interference cancellation,  cellular systems,  CDMA,  

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Summary: 
Interference Cancellation (IC) receivers can be used in CDMA cellular systems to improve the capacity. The IC receivers can be divided into two main categories, Single-User Detectors (SUD) and Multi-User Detectors (MUD). They have different characteristics in terms of intra-cell and inter-cell interference cancellation ratios. In this paper we first introduce the Normalized Griffiths' algorithm, a SUD receiver, and compare its basic performance with the well-known Serial IC. Next we examine the multi-cell performance of SUD and MUD receivers by using multi-cell link-level simulations. The results show that even though MUD receiver has clearly better single-cell performance, the SUD receiver will gain in performance in the multi-cell cases. In the three-sector multi-cell case, their performance even becomes very similar. These results are obtained using ideal conditions to be able to study the receivers' basic properties related to intra-cell and inter-cell interference.