Cooperative Coding Using Cyclic Delay Diversity for OFDM Systems

Dongwoo LEE  Young Seok JUNG  Jae Hong LEE  

IEICE TRANSACTIONS on Communications   Vol.E93-B   No.9   pp.2354-2362
Publication Date: 2010/09/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.2354
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
cooperative diversity,  orthogonal frequency division multiplexing (OFDM),  cyclic delay diversity (CDD),  

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This paper proposes cooperative coding using cyclic delay diversity (CDD) for OFDM systems. The cooperative diversity is combined with channel coding while CDD is applied to the cooperative transmission of the multiple relays to improve the beneficial effects of the cooperating relays. Analyses of frame error probability (FEP) and the average channel power of the proposed scheme are shown. Simulation results show the frame error rate (FER) of the proposed scheme. The proposed scheme provides not only a simple code design and low system complexity compared to conventional space-time processing, but better FER and diversity gain compared to direct transmission and conventional cooperative coding without CDD.