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In this paper, we investigate and analyze the performance of amplify and forward (AF) gateways employing zero-forcing (ZF) beamforming techniques in a space division multiple access (SDMA) scenario. A random number of users are isolated from their destination(s) and the only means to communicate with their destination(s) is through the AF gateway equipped with multiple antennas and employing ZF beamforming technique. All forward and backward channels experience small as well as large-scaledoi:10.1109/tvt.2016.2619697 fatcat:rbdsgyfpcven5g7qrznlnvfkqm