Title :
A new SLM OFDM scheme with low complexity for PAPR reduction
Author :
Dae-Woon Lim ; Jong-Seon No ; Chi-Woo Lim ; Habong Chung
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea
Abstract :
The authors introduce a new selected mapping (SLM) orthogonal frequency division multiplexing (OFDM) scheme with low computational complexity. The proposed SLM scheme transforms an input symbol sequence into a set of OFDM signals by multiplying the phase sequences to the signal after a certain intermediate stage of inverse fast Fourier transform (IFFT). Then, the OFDM signal with the lowest peak-to-average power ratio (PAPR) is selected for transmission. The new SLM OFDM scheme reduces the computational complexity, while it shows almost the same performance of PAPR reduction as that of the conventional SLM OFDM scheme.
Keywords :
OFDM modulation; computational complexity; fast Fourier transforms; mobile radio; sequences; IFFT; PAPR reduction; SLM OFDM scheme; computational complexity; inverse fast Fourier transform; peak-to-average power ratio; selected mapping orthogonal frequency division multiplexing; symbol-phase sequences; Bit error rate; Communication standards; Computational complexity; Fast Fourier transforms; Frequency division multiplexing; Land mobile radio; Nonlinear distortion; OFDM; Partial transmit sequences; Peak to average power ratio; Orthogonal frequency division multiplexing (OFDM); peak-to-average power ratio (PAPR); selected mapping (SLM);
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2004.840915
