Title :
A precoding scheme for DFT-based OFDM to suppress sidelobes
Author :
Xu, Renhui ; Chen, Ming
Author_Institution :
Inst. of Commun. Eng., PLA Univ. of Sci. & Technol., Nanjing, China
fDate :
10/1/2009 12:00:00 AM
Abstract :
In spectrum pooling scenario, the spectral leakage of DFT-based OFDM signal can be divided into in-band-out-of-subband (IBOSB) radiation and out-of-band (OOB) radiation. A precoding scheme is proposed to suppress the IBOSB sidelobes. The precoding design is based on the generalized eigenvalue problem. Simulation results demonstrate that the proposed scheme can suppress the sidelobes significantly in contrast to the uncoded schemes. At the same time, the bit-error-rate (BER) performance of the precoded system over multipath fading channel is improved due to the frequency diversity.
Keywords :
OFDM modulation; discrete Fourier transforms; diversity reception; eigenvalues and eigenfunctions; fading channels; multipath channels; precoding; signal processing; DFT; OFDM; frequency diversity; generalized eigenvalue problem; in-band-out-of-subband radiation; multipath fading channel; out-of-band radiation; precoding scheme; sidelobe suppression; spectral leakage; spectrum pooling; Bit error rate; Discrete Fourier transforms; Eigenvalues and eigenfunctions; Fading; Frequency diversity; Interference; Mobile communication; OFDM; Signal analysis; Transmitters; OFDM, DFT, precoding, power spectrum.;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2009.091339
