An enhanced DFT-based channel estimation using virtual interpolation with guard bands prediction for OFDM

Jeong Wook Seo, Jung Wook Wee, Won Gi Jeon, Jong Ho Paik, Dong Ku Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Citations (Scopus)

Abstract

In this paper, we investigate the conventional windowed DFT-based channel estimation for OFDM systems with guard bands. The conventional method suffers from the edge effect and the pilot position mismatch. In order to solve the problems, we propose an enhanced DFT-based channel estimation using virtual interpolation with guard bands prediction, where linear minimum mean square error (LMMSE) smoothing/prediction and circular frequency shifting are employed. This technique can efficiently mitigate the edge effect caused by the DFT of the truncated channel impulse response and compensate the pilot position mismatch that pilot symbols are not allocated at the first and the last subcarriers in a useful band. Simulation results show that the proposed method has about 5 dB SNR gain at BER=10-3 compared to the conventional method and is as good as the frequency-domain LMMSE method.

Original languageEnglish
Title of host publication2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
DOIs
Publication statusPublished - 2006 Dec 1
Event2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC - Helsinki, Finland
Duration: 2006 Sep 112006 Sep 14

Other

Other2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC
CountryFinland
CityHelsinki
Period06/9/1106/9/14

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Seo, J. W., Wee, J. W., Jeon, W. G., Paik, J. H., & Kim, D. K. (2006). An enhanced DFT-based channel estimation using virtual interpolation with guard bands prediction for OFDM. In 2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC [4022641] https://doi.org/10.1109/PIMRC.2006.254263