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Optimization of Linear Dispersion Codes for Wireless Relay Networks

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3 Author(s)
Ha X. Nguyen ; Dept. of Electr. Eng., Univ. of Saskatchewan, Saskatoon, SK ; Ha H. Nguyen ; Tho Le-Ngoc

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.

Published in:

IEEE Signal Processing Letters  (Volume:16 ,  Issue: 5 )