Then, we use multiple quadratic transformations and the Lagrange multiplier method to transform the non-convex subproblem of optimizing precoding vectors into a convex problem, while the task ...

Then, the RIS phase design subproblem is relaxed by the arithmetic-harmonic mean inequality to circumvent the complex matrix inversion, and converted into a fractional programming problem that can be ...

This is the first volume of the two-volume book on linear algebra, in the University of Tokyo (UTokyo) Engineering Course. The objective of this volume is to present, from the engineering viewpoint, ...