Genetic-fuzzy algorithm based suboptimum partial transmit sequences scheme for peak-to-average power ratio reduction in MIMO-OFDM systems

Abstract

Increased peak-to-average power ratio (PAPR) of its transmit sequence represents the main problem of the orthogonal frequency division multiplexing (OFDM) technology, as large signal peaks lead to power inefficiency of the amplifiers. In this study, a new combination based on the use of two intelligent techniques: fuzzy logic as well as genetic algorithm (GA) with the proposition of a popular reduction technique, partial transmit sequences (PTS) is presented here to decrease the probability of high PAPR appearance in multiple input-multiple output OFDM (MIMO-OFDM) system over Rayleigh fading channel. The PTS scheme is utilized in a space time block coding (STBC) model where the nominated signal for transmission has lowest PAPR. Without increasing computation, numerical results verify the competition of the presented algorithm as compared to some published studies.