Enhancement of Radio Link of Cellular Cell Using Multiple Antennas

The mobile radio channel puts various limitations on the performance of wireless or mobile communications systems. In wireless communications, the transmission path between the transmitter and receiver can vary from simple line-of-sight to one that is severely obstructed by buildings, mountains, and foliage so high data rate services are highly required. In this research, Distributed antenna system (DAS) is combined with the diversity characteristics in order to enhance the mobile radio channel also to get a high data rate. Distributed antenna systems (DAS) are traditionally deployed for the coverage purpose by replacing the single antenna of the traditionally cellular system with multiple antennas geographically separated within the cell and connected back to the main base station. Diversity is a powerful communication receiver technique that provides wireless link improvement at a relatively low cost. The downlink scenarios for DAS with single antenna selection (SAS) and multiple antenna selections (MAS) have been reviewed also the diversity technique which is applied through the MIMO system is analyzed.