A Preconditioning Technique for First-Order Primal-Dual Splitting Method in Convex Optimization

Figure 2

(a) The relation between SNR and iteration number with the nonnegative constraint, where in (a1), in (a2), and in (a3). (b) The relation between SNR and iteration number with the bounded constraint, where in (b1), in (b2), and in (b3).

(a)

(b)