Leopoldo Marini

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The return-link of a multi-beam satellite system can be regarded as a multiple-input multiple-output (MIMO) system, with users generating interference to each others. If the number of frequencies in the system (or number of colors) gets low (e.g. down to 1, for full frequency reuse), the level of inter-user interference gets higher, but the bandwidth(More)
We address the solution of convex constrained nonlinear systems by new linesearch Quasi-Newton methods. These methods are based on a proper use of the projection map onto the constraint set and on a derivativefree and nonmonotone linesearch strategy. The convergence properties of the proposed methods are presented along with a worst-case iteration(More)
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