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In this paper, we investigate the design of multiple panel arrays (MPAs) in line of sight (LoS) multiple-input-multiple-output (MIMO) communication systems. We utilize the spherical-wave model for the LoS channel component. The fundamental relations among key design parameters in MPAs LoS MIMO system are studied to obtain the maximum spatial multiplexing gain according to the effective degrees of freedom and channel capacity. We further analyze the performance of MPAs system when the array size and transmission distance are not matched and propose an algorithm to optimize the location of antennas. Numerical results indicate that the proposed algorithm can reduce the computational load compared with the exhaustive approach for the similar system performance. Moreover, the optimized panel antenna array is robust to the geometrical change, misplacement, and signal-to-noise-ratio.

Analysis of Panel Antenna Arrays in Los MIMO System