Smart antenna systems, especially those based on multibeam technology, could use angular diversity to mitigate the effects of fading on the received signal at the base station. This paper evaluates angular diversity, by expanding on a theoretical model to determine the correlation coefficient and power of signals from a four-beam antenna system. The performance of such a system with a four-branch and a two-branch maximal-ratio combining is explored under the condition of unequal branch signal strengths.
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