Sparse Array Design for Optimum Beamforming Using Deep Learning
IEEE Transactions on Aerospace and Electronic Systems(2024)SCI 2区SCI 1区
Widener Univ | Villanova Univ
Abstract
The paper considers sparse array design for receive beamforming achieving maximum signal-to-interference plus noise ratio (MaxSINR). We develop a design approach based on supervised neural network where class labels are generated using an efficient sparse beamformer spectral analysis (SBSA) approach. SBSA uses explicit information of the unknown narrowband interference environment for training the network and bears close performance to training using exhaustive search by enumerations which is computationally prohibitive for large arrays. The employed Deep Neural Network (DNN) effectively approximates the unknown mapping from the input received data spatial correlations to the output of sparse configuration with effective interference mitigation capability. The problem is posed as a classification problem where the sparse array configuration achieving MaxSINR is one-hot encoded, and indicated by the output layer of DNN. We evaluate the performance of the DNN in terms of the sparse array classification accuracy as well as in terms of the ability of the classified sparse array to mitigate interference and maximize signal power. It is shown that the DNN effectively learns the optimal sparse configuration which has desirable SINR characteristics, hence paving the way for efficient real-time implementation.
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Key words
Sensor arrays,Interference,Sensors,Array signal processing,Signal to noise ratio,Training,Signal processing algorithms,Deep neural network (DNN),maximum signal-to-interference plus noise ratio (MaxSINR),sparse arrays
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