Compensation for the demodulated phase errors caused by sampling frequency offset in OFDM systems

DOI

10.2991/iccsee.2013.98How to use a DOI?

Keywords

OFDM, sampling frequency Offset, phase deviation

Abstract

OFDM has been successfully adopted in Digital video broadcasting-terrestrial (DVB-T) due to its excellent spectral efficiency and inherent resistance to multipath effect. However, OFDM is a multi-carrier transmission technique and sampling frequency offset (SFO) always exists in OFDM systems. It must be noticed that SFO would result in interference between adjacent sub-carriers (ICI) as well as demodulated phase deviation and seriously degrade performance of demodulation. Therefore, in this paper we propose an adaptive sampling frequency tracking and demodulated phase error compensation scheme based on synchronization symbol information of OFDM signals. We achieved correction of phase errors and solved the problem that OFDM signals cannot be correctly demodulated for complex constellation when SFO exists. In-field test results of the proposed scheme in an ADSL environment indicate great performance improvement of demodulation. type .

Copyright

© 2013, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yujie Xiong
AU  - Xiaofei Zhang
AU  - Yi Zhang
PY  - 2013/03
DA  - 2013/03
TI  - Compensation for the demodulated phase errors caused by sampling frequency offset in OFDM systems
BT  - Proceedings of the 2nd International Conference on Computer Science and Electronics Engineering (ICCSEE 2013)
PB  - Atlantis Press
SP  - 382
EP  - 385
SN  - 1951-6851
UR  - https://doi.org/10.2991/iccsee.2013.98
DO  - 10.2991/iccsee.2013.98
ID  - Xiong2013/03
ER  -