Analysis on the Compensation for the Demodulated Phase Errors Caused by Sampling Frequency Offset in OFDM Systems

Yu Jie Xiong; Xiao Fei  Zang; Yi  Zang

doi:10.4028/www.scientific.net/AMM.380-384.4103

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 380-384Analysis on the Compensation for the Demodulated...

Analysis on the Compensation for the Demodulated Phase Errors Caused by Sampling Frequency Offset in OFDM Systems

Abstract:

Due to the excellent spectral efficiency and inherent resistance to multipath fading effect, OFDM has been widely adopted in Digital video broadcasting-terrestrial (DVB-T). However, as a multi-carrier transmission technique, there is sampling frequency offset (SFO) in the OFDM systems, which will seriously degrade performance of demodulation by resulting in interference between adjacent sub-carriers (ICI) and demodulated phase deviation. In this paper, to achieve correction of phase errors and solve the problem that OFDM signals cannot be correctly demodulated for complex constellation when SFO exists, we propose an adaptive sampling frequency tracking and demodulated phase error compensation scheme based on synchronization symbol information of OFDM signals. Numerical results supported by simulations are provided to show that the proposed scheme in an ADSL environment indicate great performance improvement of demodulation.

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Periodical:

Applied Mechanics and Materials (Volumes 380-384)

Pages:

4103-4107

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.380-384.4103

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Online since:

August 2013

Authors:

Yu Jie Xiong, Xiao Fei Zang, Yi Zang

Keywords:

Adaptive Sampling Frequency Tracking, Orthogonal Frequency Division Multiplexing (OFDM), SFO

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