PERFORMANCE ANALYSIS OF CLIPPED STBC CODED MIMO OFDM SYSTEM

A combination of Multiple-Input Multiple-Output Spatial Division Multiplexing technology and Orthogonal Frequency Division Multiplexing technique, namely MIMO-OFDM systems, been well-known as a potential technology to provide high speed data transmission and spectrum efficiency to attain throughput of 1 Gbit/sec and beyond improves link reliability for modern wireless communications. The rising development of Internet related contents and demand of multimedia services leads to increasing curiosity to high speed communications. It has been shown that by using MIMO system, it is possible to increase that capacity considerably. To use advantage of MIMO diversity to overcome the fading then we need to send the same signals through the different MIMO antennas and at the receiver end the different antennas will receive the same signals travelled through diverse paths. Efficient implementation of MIMO OFDM system is based on the FFT algorithm and MIMO encoding like Alamouti Space Time Block coding (STBC). In this paper, MIMO-OFDM based on Almouti Space Time Block Codes is described and the BER performance of this system is observed for various antenna configurations .