Joint Frequency Offset Estimation and Multiuser Detection Using Genetic Algorithm in MC-CDMA

Hoang-Yang LU  Wen-Hsien FANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E88-B   No.11   pp.4386-4389
Publication Date: 2005/11/01
Online ISSN: 
DOI: 10.1093/ietcom/e88-b.11.4386
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
genetic algorithm,  multiuser detection,  normalized frequency offset,  multicarrier code division multiple access,  

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Summary: 
In order to simultaneously combat both of the inter-carrier interferences (ICIs) and multiple access interferences (MAIs) to achieve reliable performance in multi-carrier code division multiple access (MC-CDMA) systems, this letter proposes a maximum likelihood based scheme for joint frequency offset estimation and multiuser symbol detection. To reduce the computational complexity called for by the joint decision statistic without extra mechanisms, the genetic algorithm (GA) is employed to solve the nonlinear optimization involved. Due to the robustness of the GA, the joint decision statistic can be efficiently solved, and, as shown by furnished simulation results, the proposed approach can offer satisfactory performance in various scenarios.