PEAK-TO-AVERAGE POWER RATIO (PAPR) REDUCTION IN MULTIPLE-INPUT MULTIPLE OUTPUT (MIMO) WITH ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEMS: A REVIEW

Abstract

Multiple-input multiple-output technology together with orthogonal frequency division multiplexing (MIMO-OFDM) is one of the most appealing techniques for mobile radio communications. It is an effective technique to combat multi-channel fading and to improve bandwidth efficiency. Simultaneously, it also increases the system's ability to provide reliable transmission. However, the main disadvantage of OFDM is the high peak-to-average-power ratio (PAPR), which, if not mitigated, will negatively impact practical applications. Algorithms to mitigate PAPR generally increase the complexity and an increase in the Bit Error Rate. Coding, phase rotation, and clipping are among the many techniques employed to reduce the PAPR. In this review, we will mainly investigate the advantages and disadvantages of MIMO-OFDM system and PAPR reduction performance with different PAPR reduction methods in MIMO-OFDM system. The main objective of this review is to enable researchers entering this field become familiar with the problem as well as the techniques to mitigate this problem. We classify MIMO-OFDM PAPR methods into three categories: Signal Distortion, Signal Scrambling, and Coding. This review discusses each category and its impact on the transmitter and receiver and summarizes the discussion in a table. We also briefly describe some of the methods used to reduce PAPR in MIMO-OFDM.