Table 1 Dual variables and their corresponding constraints

μ _k

λ _k ≥ 0

U _k

$\left[\begin{array}{l}{\mathbf{X}}_k+{\lambda }_k\mathbf{I}{\mathbf{X}}_k{\tilde{\mathbf{h}}}_k\\ {\tilde{\mathbf{h}}}_k^H{\mathbf{X}}_k^H{\tilde{\mathbf{h}}}_k^H{\mathbf{X}}_k{\tilde{\mathbf{h}}}_k-{\sigma }_k^2-{\lambda }_k{\epsilon }_k^2\end{array}\right]\succcurlyeq \mathbf{0}$

Z _k

G _k ≽0