Combined ML and DFE decoding for coded double STBC-OFDM system

Authors:
Chanho Yoon;Hoojin Lee;Joonhyuk Kang
Affiliations:
Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea and ETRI, Daejeon, Republic of Korea;Department of Information and Communications Engineering, Hansung University, Seoul, Republic of Korea;Department of Electrical Engineering, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
Venue:
IEEE Communications Letters
Year:
2010

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Abstract

An efficient combined maximum likelihood (ML) and decision feedback equalization (DFE) decoding method is proposed for a coded double space-time block code orthogonal frequency division multiplexing (DSTBC-OFDM) system. For the missing bit log likelihood ratios (LLRs) in the DFE part, our proposed detector effectively exploits Gaussian approximated LLRs with reference to the colored noise covariance matrix. Simulation results demonstrate that the proposed method can achieve comparable performance to the coded full ML detectors with deterministic and lower complexity.