DocumentCode :
1806738
Title :
Geometrically uniform trellis codes for the Rayleigh-fading channel
Author :
Van Nobelen, Robert ; Taylor, Desmond P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Canterbury Univ., Christchurch, New Zealand
Volume :
3
fYear :
1995
fDate :
14-16 Nov 1995
Firstpage :
1820
Abstract :
We have applied the theory of geometrically uniform (GU) codes to search for good PSK trellis codes for the Rayleigh flat fading channel. It is now well established that the code parameter to be optimised for the Rayleigh fading channel is the diversity (Hamming distance) of the code. We have derived an upper bound on the diversity of multiple symbol per branch trellis codes in terms of the number of states and the spectral efficiency of the code. Many of the GU codes discovered meet this bound with equality and improve upon the PSK trellis codes presented in the current literature. GU trellis codes have the advantage of a reduced code search and a reduced decoding complexity
Keywords :
Rayleigh channels; decoding; diversity reception; fading; geometric codes; phase shift keying; trellis codes; Hamming distance; PSK trellis codes; Rayleigh-fading channel; code diversity; code parameter; geometrically uniform trellis codes; multiple symbol per branch; reduced code search; reduced decoding complexity; spectral efficiency; theory; upper bound; AWGN; Convolutional codes; Equations; Fading; Hamming distance; Interleaved codes; Maximum likelihood decoding; Phase shift keying; Rayleigh channels; Upper bound;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference, 1995. GLOBECOM '95., IEEE
Print_ISBN :
0-7803-2509-5
Type :
conf
DOI :
10.1109/GLOCOM.1995.502721
Filename :
502721
Link To Document :
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