Radio Environment Map-Aided Doppler Shift Estimation in LTE Railway

Due to the high mobility of high-speed trains (HSTs), Doppler shift estimation has been a big challenge for HSTs. In this paper, the authors consider an orthogonal frequency-division multiplexing (OFDM) system based on the long-term evolution (LTE) railway standard and design the novel Doppler shift estimation algorithm. By exploiting features of HSTs, i.e., regular and repetitive routes and timetables, resulting in a predictable Doppler shift curve, a radio environment map (REM) including the Doppler shift information can be constructed via field tests. Based on REM, a maximum a posteriori estimator (MAPE) is proposed to provide an accurate estimation of Doppler shift. It uses the estimation from REM (REME) as a priori knowledge and exploits the cyclic prefix (CP) structure of OFDM to provide a maximum a posteriori estimation. The Cramer–Rao lower bounds (CRLBs) are derived. The performance of MAPE is evaluated via simulations and compared to that of REME, the classical CP-based estimator, and other existing methods. It is shown that MAPE significantly outperforms the existing methods in terms of both estimation mean square error (MSE) and bit error rate.

• Record URL:
  https://doi.org/10.1109/TVT.2016.2599558
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00189545
• Supplemental Notes:
  • Copyright © 2017, IEEE.
• Authors:
  • Hou, Zhanwei
  • Zhou, Yiqing
  • Tian, Lin
  • Shi, Jinglin
  • Li, Yonghui
  • Vucetic, Branka
• Publication Date: 2017-5

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References;
• Pagination: pp 4462-4467
• Serial:
  • IEEE Transactions on Vehicular Technology
  • Volume: 66
  • Issue Number: 5
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)
  • ISSN: 0018-9545
  • Serial URL: http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=25

Subject/Index Terms

• TRT Terms: Doppler shift; Estimation theory; High speed rail; Measurement of electromagnetic phenomena; Wireless communication systems
• Subject Areas: Data and Information Technology; Railroads;

Filing Info

• Accession Number: 01638501
• Record Type: Publication
• Files: TRIS
• Created Date: May 18 2017 1:50PM