Abstract
The performance of high-resolution Direction-of-Arrival (DOA) estimation system is degraded in the presence of mutual coupling among the elements of an antenna array. In array signal processing field, several techniques were introduced to deal with the mutual coupling effects. This paper studies and investigates the influence of the mutual coupling on the performance of DOA estimation based on the high-resolution Multiple Signal Classification (MUSIC) algorithm in uniform linear array configuration that is commonly used in 5G millimeter-wave massive Multiple Input Multiple Output (MIMO) systems. In addition, statistical analysis of the performance of the DOA using MUSIC algorithm in the presence of mutual coupling is discussed. Extensive computer simulation is carried out to assess the performance of the algorithm under mutual coupling effects, and the results are compared with standard MUSIC method without compensation of mutual coupling. Simulation results demonstrate that the adopted method of compensation achieves good performance of DOA estimation in the scenarios with mutual coupling effect.
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