Combined ML and DFE Decoding for Coded Double STBC-OFDM System

Author

Yoon, Chanho ; Lee, Hoojin ; Kang, Joonhyuk

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol. (KAIST), Daejeon, South Korea

Volume

14

Issue

12

fYear

2010

fDate

12/1/2010 12:00:00 AM

Firstpage

1164

Lastpage

1166

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.

Keywords

Gaussian processes; OFDM modulation; block codes; covariance matrices; decision feedback equalisers; maximum likelihood decoding; maximum likelihood detection; modulation coding; space-time codes; DSTBC-OFDM system; Gaussian approximated LLR; ML detectors; coded-double STBC-OFDM system; colored noise covariance matrix; combined ML-DFE decoding; decision feedback equalization decoding method; log likelihood ratios; maximum likelihood decoding method; space-time block code orthogonal frequency division multiplexing system; Decision feedback equalizers; Detectors; Interference; Maximum likelihood decoding; Noise; OFDM; LLR demapping; STBC-OFDM; double STBC; spatial multiplexing/diversity;

fLanguage

English

Journal_Title

Communications Letters, IEEE

Publisher

ieee

ISSN

1089-7798

Type

jour

DOI

10.1109/LCOMM.2010.100810.101349

Filename

5601968