Abstract: A communications system providing SDMA communication channels in a non-SDMA (non-spatial division multiple access) system and used in a specific area to establish wireless communications with mobile stations in the area comprises a smart antenna to establish wireless communications with the mobile stations, a base station controller managing transmissions and receiving information between every mobile station and an outgoing communications network, a plurality of base transceiver stations electrically connected with the base station controller, each of them establishing the wireless communications between the mobile stations and the base station controller, and a spatial spectrum management system connected between the smart antenna and the base transceiver stations.