Low Complexity Adaptive Turbo Space-Frequency Equalization for Single-Carrier Multiple-Input Multiple-Output Systems

Author

Wu, Ye ; Zhu, Xu ; Nandi, Asoke K.

Author_Institution

Group for Signal Process., Univ. of Liverpool, Liverpool

Volume

7

Issue

6

fYear

2008

fDate

6/1/2008 12:00:00 AM

Firstpage

2050

Lastpage

2056

Abstract

By combining single-carrier (SC) frequency domain equalization (FDE) and Turbo equalization, we propose a minimum mean square error (MMSE) based block-wise low complexity Turbo space-frequency equalization (TSFE) structure, which offers a tremendous complexity reduction over the symbol-wise TSFE and Turbo time-domain equalization (TTDE) structures. With a moderate code rate, the proposed SC TSFE significantly outperforms its Turbo OFDM (TOFDM) counterpart, at a comparable complexity. Besides, TSFE based on the least-mean-square structured channel estimation (LMS-SCE) provides a performance close to the case with perfect channel state information (CSI), at a high convergence rate.

Keywords

MIMO communication; channel estimation; frequency-domain analysis; least mean squares methods; turbo codes; adaptive turbo space-frequency equalization; channel state information; complexity reduction; least-mean-square structured channel estimation; minimum mean square error; single-carrier frequency domain equalization; single-carrier multiple-input multiple-output systems; turbo OFDM; turbo time-domain equalization; Adaptive equalizers; Channel estimation; Decision feedback equalizers; Dispersion; Fading; Frequency domain analysis; MIMO; Maximum likelihood estimation; OFDM; Time domain analysis;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2008.070095

Filename

4543056