Title :
Efficient space-time block codes designed by a genetic algorithm
Author :
Torrieri, Don ; Valenti, Matthew C.
Abstract :
Space-time block codes with orthogonal structures typically provide full-diversity reception and simple receiver processing. However, rate-1 orthogonal codes for complex constellations have not been found for more than two transmit antennas. By using a genetic algorithm, rate-1 space-time block codes that accommodate very simple receiver processing at the cost of reduced diversity are designed. Simulation results show that when the spectral efficiency is specified and an efficient outer code is used, the evolved codes provide better performance over the Rayleigh fading channel than minimum-decoding-complexity quasi-orthogonal space-time block codes at typical operating signal-to-noise ratios. When the fading is more severe than Rayleigh fading, evolved codes outperform orthogonal space-time block codes.
Keywords :
Rayleigh channels; block codes; diversity reception; genetic algorithms; orthogonal codes; space-time codes; transmitting antennas; Rayleigh fading channel; diversity reception; genetic algorithm; minimum-decoding-complexity codes; quasiorthogonal codes; receiver processing; signal-to-noise ratio; space-time block codes; transmit antennas; Algorithm design and analysis; Block codes; Fading; Genetic algorithms; Laboratories; Maximum likelihood decoding; Rayleigh channels; Receiving antennas; Signal to noise ratio; Transmitting antennas;
Conference_Titel :
Military Communications Conference, 2008. MILCOM 2008. IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4244-2676-8
Electronic_ISBN :
978-1-4244-2677-5
DOI :
10.1109/MILCOM.2008.4753219
