Title :
SLM with non-unit magnitude phase factors for PAPR reduction in OFDM
Author :
Yang, L. ; Li, S.Q. ; Soo, K.K. ; Siu, Y.M.
Author_Institution :
Nat. Key Lab. of Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
Selected mapping (SLM) scheme with non-unit magnitude phase factor is developed for the peak-to-average power ratio (PAPR) reduction of the orthogonal frequency division multiplexing (OFDM) system. A new low-complexity version of SLM is introduced, which employs the shifting time-domain signal combination technique to generate new candidates. Unlike the conventional SLM scheme, which needs several inverse fast Fourier transform (IFFT) operations for an OFDM signal, the proposed scheme requires to implement one IFFT operation only. Thus, it can significantly decrease the computational complexity. The simulation results show that the proposed scheme can obtain slightly poorer PAPR reduction performance than the conventional SLM scheme with the same number of candidates.
Keywords :
OFDM modulation; computational complexity; fast Fourier transforms; time-domain analysis; IFFT operation; OFDM system; PAPR reduction; computational complexity; inverse fast Fourier transform; nonunit magnitude phase factor; orthogonal frequency division multiplexing; peak-to-average power ratio; selected mapping scheme; time-domain signal combination technique; Bit error rate; Computational complexity; Fast Fourier transforms; Laboratories; OFDM; Partial transmit sequences; Peak to average power ratio; Signal generators; Signal mapping; Time domain analysis;
Conference_Titel :
Communications, Circuits and Systems, 2009. ICCCAS 2009. International Conference on
Conference_Location :
Milpitas, CA
Print_ISBN :
978-1-4244-4886-9
Electronic_ISBN :
978-1-4244-4888-3
DOI :
10.1109/ICCCAS.2009.5250554
