Performance Improvement of MIMO-OFDM Block Codes by Achieving a Suboptimum Permutation Distance

This paper propose a method in order to achieve a suboptimum permutation distance for every multi-input multi-output orthogonal frequency-division multiplexing (MIMO-OFDM) block code in the absence of perfect channel state information at the transmitter. As a matter of fact, our method is based on artificial delay power profiles (ADPPs) to obtain this permutation distance. Furthermore, we show that the performance of every MIMO-OFDM block code can be improved by applying our proposed suboptimum permutation distance in comparison with fixed, random and maximum permutation distance. Also, simulation results show that the performance of recent MIMO-OFDM block codes can be improved more than 3 dB by considering the proposed permutation.