Ef cient Space-Time Block Codes Designed by a Genetic Algorithm
نویسندگان
چکیده
Space-time block codes with orthogonal structures typically provide full-diversity reception and simple receiver processing. However, full-rate orthogonal codes for complex constellations have not been found for more than two transmit antennas. By using a genetic algorithm, rate1 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 ef ciency is speci ed and an ef cient outer code is used, the evolved codes provide better performance over the Rayleigh fading channel than either orthogonal spacetime block codes or minimum-decoding-complexity quasiorthogonal space-time block codes at typical operating signal-to-noise ratios.
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