Fig. 15
An illustration of two line graphs, a and b, comparing O U T P U T S N R in decibels across l 1, I T E R dash l 1, and O R A C L E methods.

(Color online) Performance of ℓ1-risk-minimization-based pointwise shrinkage estimator (Piece-Regular signal in Gaussian noise): (a) Output SNR versus iterations (input SNR 5 dB); and (b) Output SNR versus input SNR, averaged over 100 independent noise realizations. The number of iterations in Algorithm 1 is fixed at Niter = 20.

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