Title :
Code optimization with serially concatenated trellis coded modulation on a fading channel
Author_Institution :
Graduate Center, UniK-Univ., Kjeller, Norway
fDate :
30 May-1 June 2005
Abstract :
Using irregular, bit geometrically uniform, and recursive rate 1 inner encoders with 8-PSK Gray mapping, the iterative decoding convergence threshold signal-to-noise ratio (SNR) is minimized for an independently fading Rayleigh channel with perfect channel state information. Further low SNR optimization is obtained by searching for code combinations with maximum slope of the active burst distance, using outer codes with maximum free distance. The convergence threshold and bit error rate estimates are shown for the best found code combinations.
Keywords :
Rayleigh channels; concatenated codes; convergence of numerical methods; error statistics; iterative decoding; minimisation; parameter estimation; phase shift keying; trellis coded modulation; BER estimation; Gray mapping; PSK; Rayleigh channel; active burst distance; bit error rate estimation; code optimization; convergence threshold SNR minimization; convergence threshold signal-to-noise ratio minimization; fading channel; iterative decoding; maximum free distance; perfect channel state information; serially concatenated trellis coded modulation; Bit error rate; Channel state information; Concatenated codes; Convergence; Fading; Iterative decoding; Modulation coding; Rayleigh channels; Signal mapping; Signal to noise ratio;
Conference_Titel :
Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st
Print_ISBN :
0-7803-8887-9
DOI :
10.1109/VETECS.2005.1543373
