Joint Interference Suppression and Frequency Offset Compensation Techniques for a Reverse Link MC-CDMA System


IEICE TRANSACTIONS on Communications   Vol.E89-B   No.1   pp.118-131
Publication Date: 2006/01/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.1.118
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
reverse link,  MC-CDMA,  frequency offset,  MAI,  

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This paper addresses several relevant issues in detection process of a reverse link multicarrier code division multiple access system with frequency offset. Due to the presence of frequency offsets, power of a group of subcarriers is spread to all the available subcarriers. In order to collect all the scattered signal power, we propose a two stages receiver. First stage of the proposed receiver performs maximum ratio combining. Following from the first stage, multiple access interference is suppressed in the second stage. We propose various multiple access interference suppression techniques, having different complexity and performance. Simulation results demonstrate the advantage of the proposed receiver. We also investigate the performance of 2 major subcarrier assignment schemes, namely continuous subcarrier assignment scheme and interleaved subcarrier assignment scheme, in both ideal independent fading channel and practical correlated fading channel.