Abstract

In this paper it is proposed that a particle swarm optimization PSO based partial transmit sequence PTS technique is used so that least Peak-to-Average Power Ratio PAPR is achieved in Multiple Input Multiple Output- Orthogonal Frequency Division Multiplexin gsystems MIMO-OFDM Our approach is to apply PSO based PTS on each antenna of the system helping to find the optimal phase factors which is a straightforward method to achieve minimum PAPR in this system PSO based PTS algorithm when applied to MIMO-OFDM systems with a wide range of phase factors results in high performance after simulation The results PAPR achieved for 16X16 MIMO-OFDM systems without PTS using 16-QAM is 15 8dB whereas with PTS the PAPR achieved is 7 1 dB therefore overall reductions PAPR with and without PTS is 8 7 dB Similarly PAPR achieved for 16X16 MIMO-OFDM systems without PTS-PSO using 16-QAM is 15 8 dB whereas with PTS-PSO the PAPR achieved is 3 6 dB therefore overall reductions PAPR with and without PTS is 12 2 dB The final reduction in PAPR resulted as 8 7 dB and 12 2 dB respectively