Time Synchronization for OFDM Systems with Narrowband Interference

Authors:
Yuan Tian;Xia Lei;Yue Xiao;Shaoqian Li
Affiliations:
National Key Lab of Communications, University of Electronic Science and Technology of China, Chengdu, China 610054;National Key Lab of Communications, University of Electronic Science and Technology of China, Chengdu, China 610054;National Key Lab of Communications, University of Electronic Science and Technology of China, Chengdu, China 610054;National Key Lab of Communications, University of Electronic Science and Technology of China, Chengdu, China 610054
Venue:
RSKT '09 Proceedings of the 4th International Conference on Rough Sets and Knowledge Technology
Year:
2009

Citing 3
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Abstract

In this paper, a novel time synchronization method is proposed for orthogonal frequency division multiplexing (OFDM) system with narrowband interference (NBI). Most of the conventional algorithms estimate time offset in the time domain, thus their performance may be affected by disturbances, such as NBI. The main idea of the proposed method is based on performing time synchronization in the frequency domain using constant amplitude zero autocorrelation (CAZAC) sequences, so as to filter the NBI on the part of the frequency domain. In this case, the proposed method can get sharp synchronization peaks even at low signal-to-interference ratios (SIRs). Simulation results demonstrate better performance using this method than the conventional algorithms in the context of NBI.