MIMO System Using Transmit Diversity and Relay Selection Algorithm

Abstract

MIMO for wireless communication is an antenna based technology where multiple antennas at each end are used to minimize the bit errors, optimize speed and data integrity also it meant for improvement of the efficiency and reliability of a system. Conventional technology which use single antenna at both source and destination results in problems such as fading, cut-off, intermittent reception. To extend coverage area, data rate, quality of service etc. several systems have been come up with goal of low complexity and having high gain. This paper describes and evaluates various types of transmit diversity techniques namely MRC, STTC and STBC and relay selection algorithms wherein evaluation is done by using Amplify and Forward and Decode and Forward protocols. The proposed approach uses Alamouti (STBC) on transmitter side followed by AF and then DF by relay to achieve highest gain, and to improve the spectral efficiency.