In wireless cellular systems cochannel interference is the limiting factor in determining the capacity. Fixed wireless systems such as MMDS and LMDS are no exception to this rule. In this paper, we analyzed the signal-tointerference ratio in a highly-overlapped cellular architecture. Through macro diversity, such a cellular architecture can provide significant diversiq gains but it is vulnerable to excess cochannel interference. Analyzing the cochannel interference at the worst case point in the center of a cell shows that polarization interleaving can increase signal-to-interference ratio by several decibels.
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