PERFORMANCE IMPROVEMENT OF OFDM BY PILOT-AIDED SPARCECHANNEL ESTIMATION

• Project/Area Number: 22560380
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Communication/Network engineering
• Research Institution: Hiroshima University
• Principal Investigator: OHNO Shuichi 広島大学, 工学研究院, 准教授 (70273919)
• Project Period (FY): 2010 – 2012
• Project Status: Completed (Fiscal Year 2012)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: OFDM / 通信路推定 / スパース性 / パイロット信号 / スパース通信路 / 推定誤差 / 通信路容量

Research Abstract

For OFDM systems, number, location, and power distribution of pilot symbols are designed based on mean squared channel estimation error. The proposed method is applicable to OFDM-based cognitive radio with any null subcarriers. The sub-optimal location of pilot symbols is given by using cross entropy optimization that is a non-linear optimization technique. Pilot power distribution is determined by solving a convex optimization. Numerical simulations show that the proposed method outperformsthe conventional method.

Research Products

• [Journal Article] Pilot symbol assisted channel estimation for OFDM-based cognitive radio systems (2013)
  • Author(s): E. Manasseh, S. Ohno, and M. Nakamoto
  • Journal Title: EURASIP Journal on Advances in Signal Processing 2013 Pages: 51-51
• [Journal Article] Pilot symbol assisted channel estimation for OFDM-based cognitive radio systems (2013)
  • Author(s): E. Manasseh, S. Ohno, and M. Nakamoto
  • Journal Title: EURASIP Journal on Advances in Signal Processing Volume: - Issue: 1
  • DOI: 10.1186/1687-6180-2013-51
  • Peer Reviewed
• [Presentation] Low complexity automatic modulation classification technique for multiple modulation schemes (2013)
  • Author(s): Y. Jin and S. Ohno
  • Organizer: Technical report of IEICE
  • Place of Presentation: Kure
• [Presentation] Low coniplexity equalization for single carrier transmissions over doubly-selective channels using linear approximation (2012)
  • Author(s): S.Ohno, E.Manasseh, M.Nakamoto
  • Organizer: IEEE International Conference on Acoustics, Speech and Signal Processing
  • Place of Presentation: 京都市
  • Year and Date: 2012-03-29
• [Presentation] Low complexity equalization for single carrier transmissions over doubly-selective channels using linear approximation (2012)
  • Author(s): S. Ohno, E. Manasseh, and M. Nakamoto
  • Organizer: Proc. of IEEE International Conference on Acoustics, Speech and Signal Processing
  • Place of Presentation: Kyoto, Japan
• [Presentation] Pilot design for non-contiguous spectrum usage in OFDM-based cognitive radio networks (2012)
  • Author(s): E.Manasseh, S.Ohno, and M.Nakamoto
  • Organizer: Proc. of 2012 European Signal Processing Conference
  • Place of Presentation: Bucharest, Romania
• [Presentation] Low-complexity approximate LMMSE channel estimation for OFDM systems (2012)
  • Author(s): S. Ohno, S. Munesada, and E. Manasseh
  • Organizer: The 2012 Asia-Pacific Signal and Information Processing Association Annual Summit and Conference
  • Place of Presentation: Hollywood, USA
• [Presentation] Pilot design for non-contiguous spectrum usage in OFDM-based cognitive radio networks (2012)
  • Author(s): E.Manasseh, S.Ohno, and M.Nakamoto
  • Organizer: 2012 European Signal Processing Conference
  • Place of Presentation: Bucharest, Romania
• [Remarks]
  • URL: http://www.cse.hiroshima-u.ac.jp