kron(matrix variable, matrix variable) is non-convex, and is not allowed by CVX.
CVXUsers’ Guide Built-in functions Linear
For example, kron(X,Y) is valid only if either X or Y is constant
And norm can only accept affine argument.
Please re-read
kron(matrix variable, matrix variable) is non-convex, and is not allowed by CVX.
CVXUsers’ Guide Built-in functions Linear
For example, kron(X,Y) is valid only if either X or Y is constant
And norm can only accept affine argument.
Please re-read