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A comparative analysis of transmit diversity and beam- forming for linear and circular antenna arrays in a wireless commu- nications system is presented. The objective is to examine the efiect of random perturbations, angular power distributions on transmit di- versity and beamforming system. The perturbations are modeled as additive random errors, following complex Gaussian multivariate dis- tribution, to the antenna array steering vectors. Using outage prob- ability, probability of error, and dynamic range of transmitter power as performance measures, we have shown signiflcant efiects of array perturbations on the two systems under spatially correlated Rayleigh fading channel. We also examine the efiect of angular power distribu- tions (uniform, truncated Gaussian, and truncated Laplacian), which corresponds to difierent propagation scenario, on the performance of the two systems. Results show that the central angle-of-arrival can

EFFECT OF STEERING ERROR VECTOR AND ANGULAR POWER DISTRIBUTIONS ON BEAMFORMING AND TRANSMIT DIVERSITY SYSTEMS IN CORRELATED FADING CHANNEL