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<strong>A New Adaptive OMP-MAP Algorithm-based Iterative Sparse Channel Estimation for OFDM Underwater Communication</strong>

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Title Statement <strong>A New Adaptive OMP-MAP Algorithm-based Iterative Sparse Channel Estimation for OFDM Underwater Communication</strong>
 
Added Entry - Uncontrolled Name Kumar, Anand ; National Institute of Technology Jamshedpur
Kumar, Prashant ; National Institute of Technology Jamshedpur
Science and Engineering Research Board (SERB), Department of Science and Technology, vide file no. SRG/2020/002486
 
Uncontrolled Index Term Underwater acoustic communication; Orthogonal frequency division multiplexing; Channel estimation; Sparsity;Adaptive orthogonal matching pursuit; MAP estimation
 
Summary, etc. A sparse channel estimation approach based on doubly spread underwater acoustic (UWA) channels is widely used todetect coherent acoustic orthogonal frequency division multiplexing (OFDM) signals. A new time-domain channelestimation (CE) technique for OFDM based UWA communication with Rician fading is used to exploit the channel sparsity.First, to improve the estimation accuracy in high noise conditions, we have exploited the channel sparsity to generate aclosed-form equation for the termination condition. Then, in low-level noise instances, the additional criterion to balanceestimation accuracy and computing costs has been established. By incorporating these two requirements within theorthogonal-matching-pursuit (OMP) structure, an adaptive-OMP (AOMP) algorithm has been proposed. The AOMP andmaximum a posteriori probability (MAP) techniques are combined to provide a computationally efficient, and a newAOMP-MAP scheme for estimating the sparse complex channel path gain has been proposed. Further, The minimumvariance unbiased estimator is used to improve the proposed CE technique. Exploiting the experimental channel data,computer simulations reveal that the proposed CE technique obtains the outstanding outcomes.
 
Publication, Distribution, Etc. Indian Journal of Pure & Applied Physics (IJPAP)
2023-01-12 11:57:29
 
Electronic Location and Access application/pdf
http://op.niscair.res.in/index.php/IJPAP/article/view/66048
 
Data Source Entry Indian Journal of Pure & Applied Physics (IJPAP); ##issue.vol## 61, ##issue.no## 01 (2023): Indian Journal of Pure & Applied Physics
 
Language Note en
 
Nonspecific Relationship Entry http://op.niscair.res.in/index.php/IJPAP/article/download/66048/465617770
http://op.niscair.res.in/index.php/IJPAP/article/download/66048/465617772
http://op.niscair.res.in/index.php/IJPAP/article/download/66048/465617773
 
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