S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Journal Papers (저널논문_전기·정보공학부)
Channel Estimation for OFDM-Based WLANs in the Presence of Wiener Phase Noise and Residual Frequency Offset
- Kim, Yong-Hwa; Lee, Jong-Ho; Kim, Seong-Cheol
- Issue Date
- IEICE Trans. Commun., vol.E89-B, no.5, pp.1709-1712, May 2006
- orthogonal frequency-division multiplexing (OFDM); channel estimation; phaes noise (PHN); residual frequency offset (RFO); wireless local area networks (WLANs)
- In orthogonal frequency-division multiplexing (OFDM)-based wireless local area networks (WLANs), phase noise (PHN) and residual frequency offset (RFO) can cause the common phase error (CPE) and the inter-carrier interferences (ICI), which seriously degrade the performance of systems. In this letter, we propose a combined pilot symbol assisted and decision-directed channel estimation scheme based on the least squares (LS) and the maximum-likelihood (ML) algorithms. Simulation results present that the proposed scheme significantly improves the performance of OFDM-based WLANs.
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