Title :
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
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);
Journal_Title :
Broadcasting, IEEE Transactions on
DOI :
10.1109/TBC.2008.2007451
