A Low Complexity Selected Mapping Scheme by Use of Time Domain Sequence Superposition Technique for PAPR Reduction in OFDM System

Author

Yang, L. ; Soo, K.K. ; Siu, Y.M. ; Li, S.Q.

Author_Institution

Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu

Volume

54

Issue

4

fYear

2008

Firstpage

821

Lastpage

824

Abstract

By using the time domain sequence superposition (TDSS) technique, in this paper, we propose a low complexity selected mapping (LC-SLM) scheme for the peak-to-average power ratio (PAPR) reduction of the orthogonal frequency division multiplexing (OFDM) system. Unlike the conventional selected mapping (SLM) scheme which needs several inverse fast Fourier transform (IFFT) operations for an OFDM signal, the proposed scheme requires to implement two IFFT operations only. Thus, it can remarkably reduce the computational complexity. Simulation results show that the proposed scheme can achieve similar PAPR performance as the conventional SLM scheme.

Keywords

OFDM modulation; computational complexity; fast Fourier transforms; time-domain analysis; OFDM system; inverse fast Fourier transform; low complexity selected mapping scheme; orthogonal frequency division multiplexing; time domain sequence superposition technique; Computational complexity; Computational modeling; Data communication; Fast Fourier transforms; Frequency division multiplexing; OFDM; Partial transmit sequences; Peak to average power ratio; Sampling methods; Signal mapping; Computational complexity; orthogonal frequency division multiplexing (OFDM); peak-to-average power ratio (PAPR); selected mapping (SLM);

fLanguage

English

Journal_Title

Broadcasting, IEEE Transactions on

Publisher

ieee

ISSN

0018-9316

Type

jour

DOI

10.1109/TBC.2008.2007451

Filename

4675814