How do I rewrite the problem,so CVX can be used to solve it? Nonconvex Oct 30, 2024 F 志 肖 Oct 30, 2024 #1 The problem is norm(u-A*w,2),where u is a column vector, A is a matrix, and w is a column vector. All of these are complex vectors. The constraint is that each element of w has a modulus of 1. Thank you for your answer. M Mark L. Stone Oct 30, 2024 #2 Modulus equal to 1 is a non-convex constraint.