Design of repeat-accumulate codes for iterative detection and decoding

Author

Ten Brink, Stephan ; Kramer, Gerhard

Author_Institution

Bell Labs., Crawford Hill, NJ, USA

Volume

51

Issue

11

fYear

2003

fDate

11/1/2003 12:00:00 AM

Firstpage

2764

Lastpage

2772

Abstract

Extrinsic information transfer (EXIT) charts are used to design systematic and nonsystematic repeat-accumulate (RA) codes for iterative detection and decoding. The convergence problems of nonsystematic RA codes are solved by introducing a biregular, or doped, layer of check nodes. As examples, such nonsystematic codes are designed for multi-input/multi-output (MIMO) fading channels and are shown to operate close to capacity.

Keywords

AWGN channels; MIMO systems; channel capacity; convergence of numerical methods; error detection codes; iterative decoding; signal detection; AWGN channels; EXIT charts; LDPC codes; MIMO fading channels; additive white Gaussian noise channels; biregular check nodes; convergence problems; doped check nodes; extrinsic information transfer charts; iterative decoding; iterative detection; multi-input/multi-output fading channels; nonsystematic RA codes; nonsystematic codes; nonsystematic repeat-accumulate codes; repeat-accumulate code design; repeat-accumulate codes; AWGN; Binary phase shift keying; Concatenated codes; Design methodology; Detectors; Fading; Iterative decoding; MIMO; Parity check codes; Turbo codes;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/TSP.2003.818250

Filename

1237404