The performance of diversity techniques with Linear Maximum-Likelihood Decoder complexity

MIMO communication systems with orthogonal frequency division multiplexing (OFDM) modulation have a great potential to play an important part in the design of the next generation broadband wireless communication system. In this paper, we proposed to novel the performance of Bit Error Rate (BER) by using 128-QAM modulation technique with insertion Linear Maximum-Likelihood Decoding Technique in STFBC MIMO-OFDM by using two transmit antennas and two receive antennas. As the result shown, the improvement of BER performance of diversity system with Linear Maximum-Likelihood Decoder schemes yields good performance with low-complexity compare to an ordinary system technique, Maximum Likelihood (ML).