Title :
Stability Optimization of the Coupled Oscillator Array Steady State Solution
Author :
Georgiadis, Apostolos ; Slavakis, Konstantinos
Author_Institution :
Centre Tecnol. de Telecomunicacions de Catalunya (CTTC), Barcelona, Spain
Abstract :
A beam-forming algorithm for coupled oscillator arrays is presented. The algorithm includes null or maximum level constraints in the array factor, the array steady state solution, and additionally maximizes the decay rate of the derived solution. In order to include the decay rate constraint in the optimization formulation an alternate minimization of two eigenvalue minimization problems that can be efficiently solved, is proposed. The algorithm is demonstrated in a 9 element linear array beam-forming example.
Keywords :
eigenvalues and eigenfunctions; linear antenna arrays; minimisation; oscillators; stability; array factor; beam-forming algorithm; coupled oscillator array steady state solution; decay rate constraint; eigenvalue minimization problems; linear array beam-forming; optimization formulation; stability optimization; Constraint optimization; Eigenvalues and eigenfunctions; Equations; Frequency; Optical coupling; Oscillators; Phased arrays; Stability; Steady-state; Voltage control; Beam forming; Lyapunov stability; convex optimization; coupled oscillator arrays;
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2009.2037715