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Space division multiple access (SDMA) is a promising candidate for improving channel capacity in future wireless communication systems. Considering that discrimination performance of the user in the spatial domain depends on the array arrangement, and as a result the optimum element arrangement for SDMA should be defined, beamforming play a very important role providing fundamental theory of design procedure. However the pattern of antenna array is determined by array geometry. Two-dimensional (2-D) spatial filters that can be implemented by microstrip technology are capable of filtering the received signal in the angular domain as well as the frequency domain. This paper focuses on various geometries of eight and nine elements antenna arrays using circularly patch elements as well as hexagonal array with seven elements. The network throughput is further analyzed to determine if using a fully adaptive pattern (LMS algorithm generated pattern) results in a higher throughput with or without presence of mutual coupling effects. 282 Gozasht, Dadashzadeh, and Nikmehr
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Gozasht et al. (2007) studied this question.
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