A Channel Estimation Technique Based on Pilot Tones for OFDM Systems with a Symbol Timing Offset 


Vol. 32,  No. 10, pp. 992-1003, Oct.  2007


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  Abstract

In this paper, a channel estimation technique based on pilot tones, which does not degrade channel estimation performance even with the existence of symbol timing offset (STO) in OFDM systems, is proposed. The proposed technique performs channel estimation by interpolating channels with respect to amplitude and phase with a minimum computational complexity, differently from the conventional interpolation techniques. The proposed technique requires neither the estimation of fine STO in advance nor trigonometric operation for phase interpolation, signifying a significant reduction in computational complexity. Since the performance of the proposed technique does not depend on the STO present in OFDM systems It can be directly applied to the following areas in OFDM-based communication systems: elimination of fine STO estimation step in the synchronization procedure, elimination of STO estimation step in multiuser uplink, and channel estimation in multi-hop relay system. It is verified by computer simulation that the proposed technique can improve the performance of channel estimation significantly in the presence of STOs, compared with previous channel estimation techniques based on pilot tones.

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  Cite this article

[IEEE Style]

C. H. Park, J. K. Kim, H. Lee, Y. S. Cho, "A Channel Estimation Technique Based on Pilot Tones for OFDM Systems with a Symbol Timing Offset," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 10, pp. 992-1003, 2007. DOI: .

[ACM Style]

Chang Hwan Park, Jae Kwon Kim, Heesoo Lee, and Yong Soo Cho. 2007. A Channel Estimation Technique Based on Pilot Tones for OFDM Systems with a Symbol Timing Offset. The Journal of Korean Institute of Communications and Information Sciences, 32, 10, (2007), 992-1003. DOI: .

[KICS Style]

Chang Hwan Park, Jae Kwon Kim, Heesoo Lee, Yong Soo Cho, "A Channel Estimation Technique Based on Pilot Tones for OFDM Systems with a Symbol Timing Offset," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 10, pp. 992-1003, 10. 2007.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880