Generalized Inverse Aided PAPR-Aware Linear Precoder Design for MIMO-OFDM System

• Published in: IEEE communications letters Vol. 18; no. 8; pp. 1363 - 1366
• Main Authors: Cha, Hyunsu, Chae, Hyukjin, Kim, Kiyeon, Jang, Jinyoung, Yang, Janghoon, Kim, Dong Ku
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.2014; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Applied sciences; Coding, codes; Exact sciences and technology; Information, signal and communications theory; MIMO; Multiplexing; Peak to average power ratio; Power demand; Radiocommunications; Signal and communications theory; Signal to noise ratio; Telecommunications; Telecommunications and information theory; Transmitters. Receivers; Transmitting antennas; Vectors; PAR; OFDM; PAPR; SU-MIMO; convex optimization; MIMO; precoding; MIMO system; Coding circuit; Peak to average power ratio; Transmitter; Convex programming; Simulation; Coding; Orthogonal frequency division multiplexing; Pretreatment; Cost lowering; Antenna; Singular value decomposition; Signal to noise ratio
• ISSN: 1089-7798; 1558-2558
• DOI: 10.1109/LCOMM.2014.2328177

We propose a linear precoding scheme for a single user multiple-input-multiple-output orthogonal frequency division multiplexing (OFDM) system to minimize peak to average power ratio (PAPR) by using redundant spatial resources at the transmitter through a singular-value-decomposition-based generalized inverse. The proposed precoder based on the generalized inverse is composed of two parts. One is for minimizing PAPR, and the other is for obtaining the multiplexing gain. Moreover, the proposed precoder contains a scalar parameter α that quantifies the received signal-to-noise power ratio (SNR) loss at the cost of PAPR reduction. Even in cases of small SNR loss, the proposed scheme dramatically reduces PAPR. Furthermore, simulation results show that we can obtain a PAPR close to 1 by using dozens of transmission antennas with small SNR loss.