A Low-Complexity Hybrid Subblock Segmentation PTS Scheme for PAPR Reduction in MIMO-OFDM System

摘要

Multiple input and multiple output orthogonal frequency division multiplexing (MIMO-OFDM) is used to improve the performance and capacity of wireless communication system. OFDM is an efficient and promising modulation technique for wireless transmission due to its high spectral efficiency and robustness to frequency selective fading channels. However, it has high peak to average ratio (PAPR) which is a main disadvantage. Partial transmit sequence (PTS) is one of the most widely used technique that gives a better performance in PAPR reduction for MIMO-OFDM system. However the computational complexity of traditional PTS method is tremendous. In this paper, A Low-Complexity Hybrid Subblock Segmentation PTS Scheme for PAPR Reduction in MIMO-OFDM System is proposed. For analytic purposes, we derive computational complexity expressions for the proposed segmentation method and analyze the computational complexity of the proposed segmentation method compared with that of the random segmentation method which has the best Peak to Average Power Ratio (PAPR) reduction performance. The simulation results show that the PAPR reduction performance is degraded only slightly compared with random segmentation method.