Title :
Design of repeat-accumulate codes for iterative detection and decoding
Author :
Ten Brink, Stephan ; Kramer, Gerhard
Author_Institution :
Bell Labs., Crawford Hill, NJ, USA
fDate :
11/1/2003 12:00:00 AM
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;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2003.818250
