Summary
the 2014 International Symposium on Nonlinear Theory and its Applications
2014
Session Number:A1L-D
Session:
Number:A1L-D2
An Improved Doppler Frequency Offset Estimation Algorithm in the Indoor OFDM Communication System
Di He,
pp.64-67
Publication Date:2014/9/14
Online ISSN:2188-5079
Summary:
OFDM(orthogonal frequency division multiplexing) is a multi-carrier digital modulation technique. It’s likely to be used in next generation wireless communication and indoor visible light communication (VLC) system. When OFDM is used in these communication systems, Doppler frequency shift will become an important technical barrier because OFDM is sensitive to frequency offset. Especially in the indoor environment, Doppler frequency shift can destroy the orthogonal characteristic between sub-carriers in OFDM system. In this paper, we analyze the performance of OFDM system in the movement environment and propose a new Doppler spread estimation algorithm to improve the BER performance. Theoretical analyses and computer simulations present the advantages of the proposed approach especially under the indoor environment