EM-based turbo receiver design for low-density parity-check-coded MIMO-OFDM systems with carrier-frequency offset

Author

Salari, S. ; Ahmadian, M. ; Ardebilipour, M. ; Cances, J.-P. ; Meghdadi, V.

Author_Institution

Fac. of Electr. Eng., K.N. Toosi Univ. of Technol., Tehran

Volume

2

Issue

1

fYear

2008

fDate

1/1/2008 12:00:00 AM

Firstpage

107

Lastpage

112

Abstract

The design of expectation-maximisation (EM)-based turbo receivers for low-density parity-check-coded multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing (OFDM) systems with the presence of carrier-frequency offset (CFO) is studied. First, starting from the maximum-likelihood principle, a novel EM-based CFO estimator for MIMO-OFDM systems is devised. This estimator iteratively provides the CFO estimate with the aid of pilot symbols. It is also capable of accommodating any space-time-coded-OFDM transmission. Then this CFO estimator is incorporated into the initialisation step of the turbo receiver. Simulation results show the effectiveness of the receiver design in combating CFO over unknown frequency-selective fading channels.

Keywords

MIMO communication; OFDM modulation; expectation-maximisation algorithm; fading channels; frequency estimation; modulation coding; parity check codes; radio receivers; space-time codes; turbo codes; EM-based turbo receiver design; carrier-frequency offset estimation; expectation-maximisation algorithm; frequency-selective fading channel; low-density parity-check-coded MIMO-OFDM system; maximum-likelihood principle; multiple-input multiple-output system; orthogonal frequency-division multiplexing; pilot symbol; space-time code;

fLanguage

English

Journal_Title

Communications, IET

Publisher

iet

ISSN

1751-8628

Type

jour

DOI

10.1049/iet-com:20060561

Filename

4446631