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A Unified Time-domain Channel Estimator for OFDM based Ubiquitous Broadband Access  

Seo, Jeong-Wook (Yonsei University)
Kwak, Jae-Min (Mokpo National Maritime University)
Kim, Dong-Ku (Yonsei University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.47, no.1, 2010 , pp. 19-24 More about this Journal
Abstract
This paper proposes a unified time-domain channel estimator (UTD-CE) for ubiquitous wireless broadband access based on orthogonal frequency division multiplexing (OFDM) systems. As a part of a software radio platform for ubiquitous services, the proposed UTD-CE can be exploited with the simply changeable parameters, pilot symbols and pilot subcarriers allocation, which are usually different according to the system specifications such as IEEE802.11x WiFI, IEEE802.16x WiMAX, DMB, Media FLO, DVB-H, etc. Given the pilot information, the channel frequency responses (CFRs) of data subcarriers will be analogously estimated by Wiener filtering and discrete Fourier transform (DFT)-based interpolation in the UTD-CE. Simulation results indicate that the proposed method significantly outperforms the conventional time-domain channel estimator when the pilot information is changed.
Keywords
OFDM;
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  • Reference
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