SHERP

Joint Common Phase Error and Channel Estimation for OFDM-Based WLANs in the Presence of Wiener Phase Noise and Residual Frequency Offset

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Authors
Kim, Seong-Cheol; Lee, Jong-Ho; Kim, Yong-Hwa
Issue Date
2006-06-15
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
IEEE International Conference on Communications, vol. 7, pp. 3040-3045, 2006
Keywords
Orthogonal frequency-division multiplexingquadrature amplitude modulation (QAM)channel estimationphase noise (PHN)wireless local area networks
Abstract
In orthogonal frequency-division multiplexing
(OFDM)-based wireless local area networks (WLANs), the phase
noise (PHN) and a 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 paper, we propose a combined pilot symbol assisted and
decision-directed scheme based on the least-squares (LS) and
maximum-likelihood (ML) algorithms. In the proposed scheme,
the CPE estimator is derived using the pilot symbols embedded
in each OFDM symbol. Then, data symbols and channel response
including the CPE are estimated using the CPE estimator.
Simulation results present that the proposed scheme significantly
improves the performance of OFDM-based WLANs.
Language
English
URI
http://hdl.handle.net/10371/7759
DOI
https://doi.org/10.1109/ICC.2006.255271
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Others_전기·정보공학부
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