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Wireless channel estimation and beamforming by using block sparse adaptive filtering

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Abstract

Channel estimation normally provides information about indoor and outdoor fading channel statistics. The adaptive channel estimation models play an important role to generate the required channel state information (CSI) using the estimated channel coefficient vector. The CSI can be utilized to generate an angle vector that controls the steering mechanism of a beamformer. The beamformer provides better directive gain for linear antenna array and helps to improve the signal to noise ratio of the wireless receiver. The proposed estimation model process the transmitted quadrature amplitude modulation (QAM) data samples in the frequency domain. The adaptive design incorporates norm-based sparsity through block recursive least square (BRLS) algorithm to develop a computationally efficient model. The proposed sparse-FBRLS (Fast BRLS) model has simultaneously addressed the problems of channel estimation and beamforming in case of indoor and outdoor communication. The performance of the model is tested by different performance measures under practical mobility conditions.

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Acknowledgements

We express our sincere thanks to VSSUT Burla and IIIT Bhubaneswar for providing necessary research facilities to complete our research work.

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Correspondence to Harish Kumar Sahoo.

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Mohanty, B., Sahoo, H.K. & Patnaik, B. Wireless channel estimation and beamforming by using block sparse adaptive filtering. SIViP 15, 769–777 (2021). https://doi.org/10.1007/s11760-020-01795-0

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