Improving Wireless MIMO System Performance with Channel Estimation Based Block Coding
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In modern wireless communication systems, a combination of multiple-input multiple-output (MIMO) system with the space time block coding (STBC) can be used in conjunction with receiver and transmitter diversity to achieve high data rate and & better spectral efficiency in order to increase the communication system’s performance. In this paper, block-type and comb-type channel estimation algorithms based block coding for STBC MIMO systems over recian fading channels are used to minimize the error rate and ISI at the receiver end. The channel estimation using pilot carriers is carried out with conventional Least Square (LS) and Minimum Mean Square (MMSE) estimation algorithms. The performance of STBC MIMO system is evaluated on the basis of Symbol Error Rate (SER) level. The comparison of SER between estimated channel and without estimated channel is also observed.
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