Title :
A crest factor reduction scheme based on recursive optimum frequency domain matrix
Author :
Varahram, Pooria ; Ali, Borhanuddin
Author_Institution :
Dept. of Commun. Eng., Univ. Putra Malaysia, Serdang, Malaysia
Abstract :
One of the main imperfections in orthogonal frequency division multiplexing (OFDM) techniques is a peak-to-average power ratio (PAPR) or crest factor (CF). High crest factor signal forces a power amplifier in communication systems to back-off which leads to power efficiency degradation. Several techniques have been proposed in literature to mitigate the high peaks in OFDM signal; however most of them suffer from complexity and PAPR performance. In conventional SLM (C-SLM), increasing the number of inverse fast Fourier transform (IFFT) leads to excessive hardware resources requirement and increases system cost. In this paper a novel crest factor scheme based on recursive optimum frequency domain matrix is proposed which requires only two IFFT which results in significant reduction in the computational complexity. Simulation results show both the complexity and crest factor are reduced significantly compared to the conventional methods.
Keywords :
OFDM modulation; computational complexity; fast Fourier transforms; matrix algebra; power amplifiers; CF; IFFT; OFDM techniques; PAPR; communication systems; computational complexity; crest factor reduction scheme; crest factor signal; hardware resources; inverse fast Fourier transform; orthogonal frequency division multiplexing; peak-to-average power ratio; power amplifier; recursive optimum frequency domain matrix; Bit error rate; Computational complexity; Educational institutions; Frequency-domain analysis; Peak to average power ratio; crest factor; orthogonal frequency division multiplexing; peak-to-average power ratio; power amplifier;
Journal_Title :
Consumer Electronics, IEEE Transactions on
DOI :
10.1109/TCE.2014.6851991