In our previous study, the single-carrier frequency domain adaptive antenna array (SC-FDAAA) was proposed for single-carrier transmission. The performance of FDAAA was studied using the assumption of independent channel gains among different antenna elements in the antenna array. However, the orthogonality among antennas may not be a practical assumption. In this paper, we will study the case where correlation among antennas is considered. The correlation between antennas is determined by the radiation pattern and separation distance between different antenna elements. We will focus on the effect of antenna separation distance in this paper.
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