The INVESTIGATION ON ALAMOUTI CODING TECHNIQUE ON BER PERFORMANCE TECHNIQUES

Abstract

The paper presents the analysis of Space-Time Block Codes (STBC) used in Multiple-Input Multiple Output (MIMO) systems to assure transmit diversity. The receive diversity is resolved with a Maximum Ratio Combining technique. For a fixed number of transmit antennas, the performances of different STBC codes are analyzed in terms of Bit Error Rate (BER) and diversity gain for a quasi-static Rayleigh flat fading channel. Multiple antenna (MIMO) systems with significantly reduced complexity and (STBC) space time block coding, for communication over fading channels (Rayleigh channel is used in this paper) using multiple transmit antennas have been used. We have tested the performance of Alamouti coding technique for the Rayleigh channel. The signals on the transmitter (Tx) antennas at one end and the receiver (Rx) antennas at the other end are “combined” in such a way that the BER (quality) or the data rate (bits/sec) of the communication are improved. The simulation results are used to compare and analyze the performance.