A Novel Time-Varying Sparse Channel Estimation Based on Block-Type Pilot and SAMP

2017 ◽  
Author(s):  
Rui Xu ◽  
Weina Yuan ◽  
Jianling Wang
Keyword(s):  
Channel Estimation ◽  
Block Type ◽  
Time Varying ◽  
Sparse Channel Estimation ◽  
Sparse Channel

scholarly journals Multi Stage Kalman Filter (MSKF) Based Time-Varying Sparse Channel Estimation with Fast Convergence

2021 ◽  
Author(s):  
Parthapratim De
Keyword(s):  
Kalman Filter ◽  
Channel Estimation ◽  
Fast Convergence ◽  
Time Varying ◽  
Sparse Channel Estimation ◽  
Multi Stage ◽  
Ieee Journal ◽  
Sparse Channel

<div>Multi Stage Kalman Filter (MSKF) Based Time-Varying Sparse Channel Estimation with Fast Convergence</div>Submitted to IEEE Journal

scholarly journals Multi Stage Kalman Filter (MSKF) Based Time-Varying Sparse Channel Estimation with Fast Convergence

2021 ◽  
Author(s):  
Parthapratim De
Keyword(s):  
Kalman Filter ◽  
Channel Estimation ◽  
Fast Convergence ◽  
Time Varying ◽  
Sparse Channel Estimation ◽  
Multi Stage ◽  
Ieee Journal ◽  
Sparse Channel

<div>Multi Stage Kalman Filter (MSKF) Based Time-Varying Sparse Channel Estimation with Fast Convergence</div>Submitted to IEEE Journal

scholarly journals Bayesian Learning-Based Clustered-Sparse Channel Estimation for Time-Varying Underwater Acoustic OFDM Communication

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4889
Author(s):  
Shuaijun Wang ◽  
Mingliu Liu ◽  
Deshi Li
Keyword(s):  
Channel Estimation ◽  
Bayesian Learning ◽  
Distribution Model ◽  
Estimation Accuracy ◽  
Delay Spread ◽  
Time Varying ◽  
Ofdm Systems ◽  
Underwater Acoustic ◽  
Sparse Channel Estimation ◽  
Sparse Channel

Orthogonal frequency division multiplexing (OFDM) has been widely adopted in underwater acoustic (UWA) communication due to its good anti-multipath performance and high spectral efficiency. For UWA-OFDM systems, channel state information (CSI) is essential for channel equalization and adaptive transmission, which can significantly affect the reliability and throughput. However, the time-varying UWA channel is difficult to estimate because of excessive delay spread and complex noise distribution. To this end, a novel Bayesian learning-based channel estimation architecture is proposed for UWA-OFDM systems. A clustered-sparse channel distribution model and a noise-resistant channel measurement model are constructed, and the model hyperparameters are iteratively optimized to obtain accurate Bayesian channel estimation. Accordingly, to obtain the clustered-sparse distribution, a partition-based clustered-sparse Bayesian learning (PB-CSBL) algorithm was designed. In order to lessen the effect of strong colored noise, a noise-corrected clustered-sparse channel estimation (NC-CSCE) algorithm was proposed to improve the estimation accuracy. Numerical simulations and lake trials are conducted to verify the effectiveness of the algorithms. Results show that the proposed algorithms achieve higher channel estimation accuracy and lower bit error rate (BER).

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