压缩感知经典论文中文译文.pdf

• • Ψ f (x) y = f, ϕ , k = 1, . . . , m. k k ϕk y f y y f ∈ Rn m f n m n m n f f ∗ ∗ ∗ ∗ A ϕ , ϕ , ϕ , ..., ϕm m × n 1 2 3 ϕ∗ ϕ m n y = Af ∈ Rm f ∈ Rn f ∈ Rn Ψ = [Ψ , Ψ , . . . , Ψ ] 1 1 1 () = ψ () =1 x xi = f, Ψi (t)f f (t) S (x ) s i f := Ψx x x S s s s i S S Ψ f − f = s 2 x − x s 2 x x x