Low-complexity selected mapping scheme using cyclic-shifted inverse fast Fourier transform for peak-to-average power ratio reduction in orthogonal frequency division multiplexing systems

• Published in: IET communications Vol. 7; no. 8; pp. 774 - 782
• Main Authors: Kim, Kee-Hoon, Jeon, Hyun-Bae, No, Jong-Seon, Shin, Dong-Joon
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 01.05.2013; John Wiley & Sons, Inc
• Subjects: Complexity; Computation; cyclic shifting; digital arithmetic; fast Fourier transforms; Fourier transforms; IFFT; interference suppression; Inverse; inverse fast Fourier transform; inverse transforms; Joints; Mapping; numerical analysis; OFDM modulation; OFDM system; Orthogonal Frequency Division Multiplexing; PAPR reduction; peak‐to‐average power ratio reduction; Reduction; selected mapping scheme; sequences; signal generators; signal sequence generation; SLM scheme; fast Fourier transforms; interference suppression; orthogonal frequency division multiplexing; signal generators; signal sequence generation; selected mapping scheme; IFFT; sequences; inverse transforms; PAPR reduction; SLM scheme; inverse fast Fourier transform; digital arithmetic; peak-to-average power ratio reduction; numerical analysis; OFDM modulation; cyclic shifting; OFDM system
• ISSN: 1751-8628; 1751-8636; 1751-8636
• DOI: 10.1049/iet-com.2012.0761

In this study, a new peak-to-average power ratio (PAPR) reduction scheme for orthogonal frequency division multiplexing (OFDM) is proposed based on the selected mapping (SLM) scheme. The proposed SLM scheme generates alternative OFDM signal sequences by cyclically shifting the connections in each subblock at an intermediate stage of inverse fast Fourier transform (IFFT). Compared with the conventional SLM scheme, the proposed SLM scheme achieves similar PAPR reduction performance with much lower computational complexity and no bit error rate degradation. The performance of the proposed SLM scheme is analysed mathematically and verified through numerical analysis. Also, it is shown that the proposed SLM scheme has the lowest computational complexity among the existing low-complexity SLM schemes exploiting the signals at an intermediate stage of IFFT.