Pilot-Assisted Time-Varying Channel Estimation for OFDM Systems

@article{Tang2007PilotAssistedTC,
  title={Pilot-Assisted Time-Varying Channel Estimation for OFDM Systems},
  author={Zijian Tang and Rocco Claudio Cannizzaro and Geert Leus and Paolo Banelli},
  journal={IEEE Transactions on Signal Processing},
  year={2007},
  volume={55},
  pages={2226-2238}
}
In this paper, we deal with channel estimation for orthogonal frequency-division multiplexing (OFDM) systems. The channels are assumed to be time-varying (TV) and approximated by a basis expansion model (BEM). Due to the time-variation, the resulting channel matrix in the frequency domain is no longer diagonal, but approximately banded. Based on this observation, we propose novel channel estimators to combat both the noise and the out-of-band interference. In addition, the effect of a receiver… 
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Pilot-Assisted Time-Varying Ofdm Channel Estimation
TLDR
This paper proposes novel channel estimators to combat both the noise and the out-of-band interference in orthogonal frequency-division multiplexing (OFDM) systems.
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In this paper, we deal with channel estimation for orthogonal frequency-division multiplexing (OFDM) systems. The channels are assumed to be time-varying (TV) and approximated by a basis expansion…
Pilot-Assisted Time-Varying Channel Estimation for OFDM Systems with Phase Noise
In this paper, a novel channel estimation technique is presented to fight against the impairment caused by the rapidly time-varying channel and random phase noise, which is very common in the…
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In this paper, we will focus on channel estimation (CE) in orthogonal frequency-division multiplexing (OFDM) systems. The time-varying (TV) channelsare modeled by a basis expansion model (BEM). Due…
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This paper uses a best linear unbiased estimator (BLUE) to estimate the channel with the aid of frequency-multiplexed pilots and proposes simple pilot structures that guarantee channel identifiability.
Low Pilot Ratio Channel Estimation for OFDM Systems
TLDR
Aoubly-selective channel estimator for orthogonal frequency division multiplexing (OFDM) systems with the advantages of low pilot ratio and robustness against inter-carrier interference is proposed.
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TLDR
This paper proposes a channel estimation scheme over time-varying and sparse dispersive channel with circular grouped pilot pattern, which occupies much less subcarriers and outperforms the existing methods applied to sparse dispersion channel with higher spectral efficiency.
BEM-Based Reconstruction of Time-Varying Sparse Channel in OFDM Systems
TLDR
The numerical simulations illustrate that the proposed two-step estimation scheme for significant channel taps outperforms direct estimation methods for all the channel taps and also this method can reduce the required pilots and thus reduce the computational load and improve the spectral efficiency.
Parameter Based Channel Estimation for OFDM Systems Over Time-Varying Channels
TLDR
This paper investigates the parameter-based (PB) channel estimation for orthogonal frequency division multiplexing over time-varying channels and proposes a differential scheme, utilizing the repetitive structure of the training signal, to estimate these parameters.
Time-varying channel estimation for OFDM with extended observation window
TLDR
A method to extend the observation window of BEM based algorithms to the range of multiple OFDM blocks is established and adapted to pilot-assisted OFDM systems, and the time-varying channel can be estimated more accurately, with comparable complexity as those of traditional algorithms.
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