Title :
Optimization of Linear Dispersion Codes for Wireless Relay Networks
Author :
Nguyen, Ha X. ; Nguyen, Ha H. ; LE-NGOC, THO
Author_Institution :
Dept. of Electr. Eng., Univ. of Saskatchewan, Saskatoon, SK
fDate :
5/1/2009 12:00:00 AM
Abstract :
A design method is introduced for linear dispersion (LD) space-time codes in wireless relay networks under Rayleigh fading channels. The codes are designed with a stochastic quasi-gradient algorithm to minimize the upper bound of the average pairwise error probability. Simulation results show that the optimized codes achieve a coding gain of about 2 dB over codes that are randomly generated based on the isotropic distribution.
Keywords :
error statistics; optimisation; space-time codes; coding gain; distributed space-time coding; isotropic distribution; linear dispersion codes; pair-wise error probability; stochastic optimization; wireless relay networks; Algorithm design and analysis; Design methodology; Design optimization; Fading; Pairwise error probability; Relays; Space time codes; Stochastic processes; Telecommunication network reliability; Upper bound; Coding gain; distributed space-time coding; pairwise error probability (PEP); relay networks; stochastic optimization;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2009.2015988
