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Journal of Computer Networks and Communications
Volume 2011 (2011), Article ID 195740, 9 pages
http://dx.doi.org/10.1155/2011/195740
Research Article

A Novel SLM Scheme for PAPR Reduction in OFDM Systems

Key Laboratory of Wireless Sensor Network and Communication, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, No. 778 Chang-Ning Road, Shanghai 200050, China

Received 2 December 2010; Revised 21 February 2011; Accepted 31 March 2011

Academic Editor: W. Hamouda

Copyright © 2011 Tian-Ming Ma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Orthogonal frequency-division multiplexing (OFDM) is an attractive transmission technique for high-bit-rate communication systems. One major drawback of OFDM is the high peak-to-average power ratio (PAPR) of the transmitter's output signal. A novel selected mapping (SLM) scheme is proposed, which employs matrix transformation, cyclically shifting, and linear combining algorithm to generate new candidates. The novel scheme requires only one IFFT and gets more candidate transmission signals throughout the entire process. The complexity analysis and simulation results show that this algorithm can dramatically reduce computational complexity comparing with the conventional SLM scheme as in Hill et al., 2000; Yang et al., 2009; Wang and Ouyang, 2005; Li et al., 2010; and Heo et al., 2007 under the similar PAPR reduction performance.