Performance Evolution of Improved QOSTBC in Wireless Communication System

摘要

In this paper, a block code technique is proposed to increase the data rate and to reduce the symbol error rate for the wireless communication. The designed space time block code (STBC) is compared with golden code 2x2, silver code 2x2. STBC is used to realize the diversity gain and provide the remarkable performance in wireless communication systems using MIMO. STBC is based on improved Quasi orthogonal space time block codes (QOSTBC). Quasi orthogonal space time block codes provide higher symbol transmission rates at the expense of losing the diversity gain which provide partial diversity. The symbol error rate is to be analyzed by increasing the number of receiver antennas in power of 2 taking transmitter antenna as '2'. Other part of this work evaluate the performance of improved QOSTBC at 1, 1/2, 3/4 code rate. The proposed code reduce SER 60%.The proposed code has been designed and simulated using Matlab 7.10