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

fYear

2009

fDate

23-25 July 2009

Firstpage

53

Lastpage

55

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ICCCAS.2009.5250554

Filename

5250554