Title :
New low-complexity turbo-like codes
Author :
Massey, P.C. ; Costello, D.J., Jr.
Author_Institution :
Dept. of Electr. Eng., Notre Dame Univ., IN, USA
Abstract :
We discuss the design of new low-complexity turbo-like codes based on a multiple parallel concatenation of 4-state and 2-state constituent codes. The new code designs take advantage of the big-numerator/little-denominator principle along with specially designed interleavers to outperform previously designed turbo codes over the entire range of signal-to-noise ratios. Puncturing at the encoder is used to produce low-complexity codes with excellent performance at code rates of 1/2 and 1/3. The multiple parallel concatenation and puncturing results in turbo-like encoders which are either partially systematic or completely nonsystematic. Comparisons with the proposed 8-state turbo coding standard and with other low-complexity alternative code designs are included.
Keywords :
computational complexity; concatenated codes; interleaved codes; noise; turbo codes; 2-state constituent codes; 4-state constituent codes; 8-state turbo coding standard; SNR; big-numerator/littledenominator; code rates; interleavers; low-complexity turbo-like codes; multiple parallel concatenation; signal-to-noise ratio; turbo codes; Bit error rate; Code standards; Concatenated codes; Convergence; Convolutional codes; Iterative algorithms; Iterative decoding; Polynomials; Signal to noise ratio; Turbo codes;
Conference_Titel :
Information Theory Workshop, 2001. Proceedings. 2001 IEEE
Conference_Location :
Cairns, Queensland, Australia
Print_ISBN :
0-7803-7119-4
DOI :
10.1109/ITW.2001.955139