Approximation Theory
Orthogonal matching pursuit is a greedy algorithm used for sparse approximation that iteratively selects the most correlated elements from a given set of basis functions to reconstruct a signal. It aims to find a sparse representation of a signal by selecting the best basis vectors in a way that orthogonalizes the residual error at each step, which improves the quality of the approximation. This method effectively balances computational efficiency and approximation accuracy, making it a popular choice for signal processing and data compression tasks.
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