A Low Complexity SLM-Based Radix FFT Method for PAPR Reduction in OFDM Systems

Author

Ghassemi, Abolfazl ; Gulliver, T. Aaron

fYear

2007

fDate

22-24 Aug. 2007

Firstpage

304

Lastpage

307

Abstract

A low complexity selective mapping (SLM) technique for reducing the peak-to-average power ratio (PAPR) of an orthogonal frequency division multiplexing (OFDM) signal is introduced. The intermediate signals within an N-point IFFT are used to generate the phase sequences. We use decimation in frequency (DIF) and propose a low computational complexity technique based on multiplying the phase sequences at different IFFT stages. This new technique greatly reduces the multiplicative complexity while providing similar PAPR reduction to ordinary SLM (O-SLM). The additive complexity is also reduced.

Keywords

OFDM modulation; computational complexity; fast Fourier transforms; signal processing; OFDM reduction; OFDM system; decimation in frequency; intermediate signal; inverse fast Fourier transform; low complexity selective mapping; low computational complexity; multiplicative complexity; orthogonal frequency division multiplexing signal; peak-to-average power ratio reduction; phase sequence generation; radix FFT method; Communication standards; Computational complexity; Frequency division multiplexing; OFDM; Peak to average power ratio; Quadrature amplitude modulation; Quadrature phase shift keying; Signal generators; Signal mapping; Wireless communication; Orthogonal frequency-division multiplexing; Selective Mapping; decimation in frequency (DIF); peak-to-average power ratio (PAPR);

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Computers and Signal Processing, 2007. PacRim 2007. IEEE Pacific Rim Conference on

Conference_Location

Victoria, BC

Print_ISBN

978-1-4244-1189-4

Electronic_ISBN

1-4244-1190-4

Type

conf

DOI

10.1109/PACRIM.2007.4313235

Filename

4313235