Title :
On the slope of the active distances for trellis coded modulation
Author :
Baumgartner, B. ; Hof, A. ; Bossert, M.
Author_Institution :
Dept. of Telecommun. & Appl. Inf. Theor., Ulm Univ., Germany
Abstract :
The slope is the asymptotic growth rate of the active distances which are of particular interest for the design of trellis coded modulation schemes and concatenated codes. The higher the slope (growth rate) of the active burst distance, the better the error correcting capability of the code. In this paper we introduce the slope as a new parameter for trellis coded modulation and present a matrix based method for its computation. The example of a trellis code based on asymmetric 4ASK will be used to illustrate the computation and the optimization of the slope. Simulation results confirm the improved error correcting capability for trellis codes with high slope.
Keywords :
AWGN channels; amplitude shift keying; error correction codes; finite state machines; matrix algebra; optimisation; trellis coded modulation; ASK; AWGN channel; active burst distance; additive white Gaussian noise channels; amplitude shift keying; concatenated codes; error correcting code; matrix method; trellis coded modulation scheme; AWGN; Additive white noise; Computational modeling; Concatenated codes; Convolutional codes; Error correction; Error correction codes; Information theory; Modulation coding; Noise measurement;
Conference_Titel :
Communications, 2004 International Zurich Seminar on
Print_ISBN :
0-7803-8329-X
DOI :
10.1109/IZS.2004.1287388
