Title :
Rate-1/2 component codes for nonbinary turbo codes
Author :
Reid, Andrew C. ; Gulliver, T. Aaron ; Taylor, Desmond P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Canterbury, Christchurch, New Zealand
Abstract :
The iterative decoding structure and component maximum a posteriori decoders used for decoding binary concatenated codes can be extended to the nonbinary domain. This paper considers turbo codes over nonbinary rings, specifically ternary, quaternary, penternary, hexernary, and octernary codes. The best rate-1/2 component codes are determined using a practical search algorithm. The performance of the resulting rate-1/3 turbo codes on an additive white Gaussian noise channel using q-ary phase-shift keying modulation is given.
Keywords :
AWGN channels; binary codes; concatenated codes; iterative decoding; maximum likelihood decoding; modulation coding; phase shift keying; search problems; turbo codes; Q-ary phase-shift keying modulation; additive white Gaussian noise channel; binary concatenated codes; iterative decoding structure; maximum aposteriori decoder; rate-1/2 component code; ring code; search algorithm; turbo codes; AWGN; Additive white noise; Concatenated codes; Convolutional codes; Iterative decoding; Modular construction; Modulation coding; Phase modulation; Phase shift keying; Turbo codes; Nonbinary turbo codes; ring codes;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2005.855019
