Optimum window design by semi-infinite quadratic programming

This letter presents a new extended active set strategy for optimum finite impulse response (FIR) window design by semi-infinite quadratic programming , The windows mag be asymmetric corresponding to frequency responses with g eneral nonlinear phase, The optimality criterion is to minimize the sidelob e energy (L-2-norm) subject to a peak sidelobe magnitude-constraint (L-infi nity-constraint), Additional linear constraints are used to form the mainlo be (unity DC gain). Numerical examples involving group delay specifications are used to illustrate the usefulness of the algorithm.