Volume 8 Number 12 (Dec. 2013)
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JCP 2013 Vol.8(12): 3191-3195 ISSN: 1796-203X
doi: 10.4304/jcp.8.12.3191-3195

An Improved Doppler Frequency Offset Estimation Algorithm of OFDM System under High-speed Movement Environment

Yunlv Hong, Di He
Department of Electronic Engineering, Shanghai Jiao Tong University, Shanghai, China
Abstract—Orthogonal frequency division multiplexing (OFDM) is a multi-carrier digital modulation technique. It’s likely to be used in next generation high-speed railway communication system. When OFDM is used in the communication of high-speed railway user s, Doppler frequency shift will become an important technical barrier, because OFDM is sensitive to frequency offset. Especially in high-speed movement environment, Doppler frequency shift can destroy the orthogonal characteristic between subcarriers in OFDM system. In this paper, we analyze the performance of OFDM system in high-speed movement environment and propose a new Doppler spread estimation algorithm to improve the bit error rate (BER) performance. Theoretical analysis and computer simulations present the advantages of the proposed approach, especially under high-speed railway environment.

Index Terms—High-speed movement environment, OFDM, Doppler frequency shift, Frequency offset estimation

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Cite: Yunlv Hong, Di He, "An Improved Doppler Frequency Offset Estimation Algorithm of OFDM System under High-speed Movement Environment," Journal of Computers vol. 8, no. 11, pp. 3191-3195, 2013.

General Information

ISSN: 1796-203X
Frequency: Monthly
Editor-in-Chief: Prof. Liansheng Tan
Executive Editor: Ms. Nina Lee
Abstracting/ Indexing: DBLP, EBSCO,  ProQuest, INSPEC, ULRICH's Periodicals Directory, WorldCat, CNKI,etc
E-mail: jcp@iap.org
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