Performance Investigation of PAPR Mitigation in MIMO-OFDM System Using Unconstrained Global Optimization Base Partial Transmit Sequence

Abstract

AbstractIn today’s digital world, the demand for multimedia data services over wireless links has grown up rapidly. The demand for high-speed data communication access leads to the development of existing technology named Multi-Input Multi-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM). This technology is used in LTE, 4G technology, etc. It suffers from a high peak-to-average power ratio (PAPR) problem. Many methods were applied to solve this problem. PTS technique is one of the efficient techniques used for the reduction of PAPR. PTS complexity depends on the number of sub-blocks and the allowed phase vectors. This paper utilizes an EM-based strategy to get the ideal stage factor for the PTS method to decrease computational intricacy and improve PAPR reduction. We planned the stage factor search of the PTS system as a worldwide enhancement issue with bound imperatives. We, at that point, connected the EM-based strategy to look for the ideal stage factor. Results have been validated through substantial simulation tests. The proposed technique PAPR performance with different parameters is also verified through extensive computer simulations. The proposed technique offers significant PAPR reduction compared to conventional PAPR reduction methods.KeywordsMultiple-input multiple-output (MIMO)Orthogonal frequency division multiplexing (OFDM)Peak-to-average power ratio (PAPR)Unconstrained global optimization (UGO) and partial transmit sequences (PTSs)