Turbo MIMO equalization and decoding in fast fading mobile coded OFDM

Author

Liu, Daniel N. ; Fitz, Michael P.

Author_Institution

Ming Hsieh Dept. of Electr. Eng., Univ. of Southern California, Los Angeles, CA

fYear

2008

fDate

23-26 Sept. 2008

Firstpage

977

Lastpage

982

Abstract

Data detection of coded multiple-input multipleoutput (MIMO) orthogonal frequency division multiplexing (OFDM) in fast time-varying channels are considered. Maintaining high performance with manageable complexity relies on iterative soft-in soft-out equalization and decoding. This paper derives the optimum front-end demodulation structure by extending Ungerboeck equalizer formulation to a MIMO intercarrier interference (ICI) channel. Utilizing the fact that ICI energy is clustered in adjacent subcarriers, frequency domain equalization is made localized. This paper further proposes a computational efficient linear minimum mean square error (LMMSE) based equalization method: recursive sliding-window (SW) SIC-LMMSE equalizer. Simulation results are reported for the iterative receivers with application to the mobile worldwide interoperability for microwave access (WiMAX).

Keywords

MIMO communication; OFDM modulation; WiMax; decoding; equalisers; fading; intercarrier interference; least mean squares methods; mobile radio; time-varying channels; turbo codes; ICI; data detection; decoding; extending Ungerboeck equalizer formulation; fading mobile coded OFDM; frequency domain equalization; intercarrier interference channel; iterative soft-in soft-out equalization; linear minimum mean square error; mobile worldwide interoperability for microwave access; multiple-input multiple-output; optimum front-end demodulation structure; orthogonal frequency division multiplexing; recursive sliding-window equalizer; time-varying channels; turbo MIMO equalization; Computational efficiency; Demodulation; Equalizers; Fading; Frequency domain analysis; Interference; Iterative decoding; MIMO; OFDM; Time-varying channels;

fLanguage

English

Publisher

ieee

Conference_Titel

Communication, Control, and Computing, 2008 46th Annual Allerton Conference on

Conference_Location

Urbana-Champaign, IL

Print_ISBN

978-1-4244-2925-7

Electronic_ISBN

978-1-4244-2926-4

Type

conf

DOI

10.1109/ALLERTON.2008.4797664

Filename

4797664