A Low-Complexity Upgrade of the Linear Detector for MIMO Channels via Partial Decision Feedback

Author

Waters, Deric W. ; Barry, John R.

Author_Institution

Texas Instrum., Dallas, TX

Volume

6

Issue

5

fYear

2007

fDate

5/1/2007 12:00:00 AM

Firstpage

1587

Lastpage

1590

Abstract

The BLAST-ordered decision-feedback (BODF) detector is a nonlinear detection strategy for multiple-input multiple-output (MIMO) channels that can significantly outperform a linear detector. However, for some applications even the BODF detector is too complex. We propose the partial decision-feedback (PDF) detector, a stripped-down version of the BODF detector that only feeds back one decision. The PDF detector performs close to the BODF detector, with complexity comparable to the linear detector. For example, over a 3-input 3-output Rayleigh-fading channel with 64-QAM inputs, the PDF detector is 21% less complex than the BODF detector, yet requires only 0.3 dB more average signal energy to reach a bit-error rate of 10^-3

Keywords

MIMO communication; Rayleigh channels; error statistics; quadrature amplitude modulation; signal detection; BLAST-ordered decision-feedback; MIMO channels; QAM; Rayleigh-fading channel; bit-error rate; linear detector; low-complexity upgrade; multiple-input multiple-output channels; nonlinear detection strategy; partial decision feedback; Bit error rate; Detectors; Feedback; Feeds; Interference cancellation; MIMO; Noise cancellation; Noise reduction; Nonlinear filters; Rayleigh channels;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2007.360354

Filename

4202158