Title :
A new selected mapping scheme without additional IFFT operations in OFDM systems
Author :
Cho, Soobum ; Park, Sang Kyu
Author_Institution :
Dept. of Electron. & Comput. Eng., Hanyang Univ., Seoul, South Korea
fDate :
11/1/2011 12:00:00 AM
Abstract :
Selected mapping (SLM) is an efficient peak-toaverage power ratio (PAPR) reduction scheme without signal distortion in orthogonal frequency division multiplexing (OFDM) systems. Therefore, it can be applied to mobile consumer electronics that are sensitive to high PAPR because of the limitation of the linear area of a power amplifier. However, enormous inverse fast Fourier transforms (IFFTs) are needed for the sufficient PAPR reduction performance, which cause the mobile devices with SLM scheme to become quite complex and reduce battery power consumption. In this paper, we propose a new SLM scheme that replaces the additional IFFT operations with a conversion of the other candidate OFDM signal. Simulation results show that the proposed scheme significantly reduces the computational complexity, while it obtains the better PAPR reduction performance than the dummy sequence insertion (DSI)-partial transmit sequence (PTS) scheme1.
Keywords :
OFDM modulation; communication complexity; consumer electronics; low-power electronics; mobile computing; power amplifiers; IFFT; OFDM signal; PAPR reduction performance; SLM scheme; battery power consumption reduction; computational complexity reduction; inverse fast Fourier transform; mobile consumer electronics; mobile devices; orthogonal frequency division multiplexing; peak-to-average power ratio; power amplifier; selected mapping scheme; Computational complexity; Consumer electronics; Frequency modulation; Partial transmit sequences; Peak to average power ratio; DSI-PTS.; IFFT; OFDM; PAPR; SLM;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2011.6131119