Performance Evaluation of Adaptive MIMO- System for High Data Rate using Orthogonal Space Time Block Codes

The advances in wireless technology lead to the simultaneous growth in data speed with high accuracy in the field of communication. It is well known that, meeting the increased requirements of data rate in 4G technology is a complex task. So in order to meet these requirements a Multiple-Input-Multiple-Output (MIMO) system has been developed. Also MIMO-OSTBC system helps in improving accuracy and providing high data rates using spatial diversity and Spatial Multiplexing techniques respectively. This paper discusses different results obtained after simulation of various transmitting and receiving antennas using MIMO-OSTBC technology. Simulation results conclude that for a two transmitting and two receiving antenna system, the Frame Error Rate (FER) for MIMO-OSTBC system is observed to be 0.1773 at SNR of 6dB, and for two transmitting and four receiving antenna system the FER is 0.03605 at same SNR and for three transmitting and two receiving antenna system the FER is 0.01808 at SNR of 6 dB. It is observed that the Frame Error Rate (FER) for a MIMO system with three transmitting and two receiving antennas is minimum and based on the observed results it is concluded that by implementing both transmit and receive diversity, high data rates can be achieved with reduced FER.