1. [1] M. Kawamata and T. Higuchi, “A unified approach to the optimal synthesis of fixed-point state-space digital filters,” IEEE Trans. Acoust. Speech Signal Process., vol.ASSP-33, no.4, pp.911-920, Aug. 1985.
2. [2] S. Yamaki, M. Abe, and M. Kawamata, “A closed form solution to L2-sensitivity minimization of second-order state-space digital filters,” IEICE Trans. Fundamentals, vol.E91-A, no.5, pp.1268-1273, May 2008.
3. [3] S. Yamaki, M. Abe, and M. Kawamata, “A closed form solution to L2-sensitivity minimization of second-order state-space digital filters subject to L2-scaling constraints,” IEICE Trans. Fundamentals, vol.E91-A, no.7, pp.1697-1705, July 2008.
4. [4] B.C. Moore, “Principal component analysis in linear systems: Controllability, observability, and model reduction,” IEEE Trans. Autom. Control, vol.AC-26, no.1, pp.17-32, Feb. 1981.
5. [5] L. Pernebo and L.M. Silverman, “Model reduction via balanced state space representations,” IEEE Trans. Autom. Control, vol.AC-27, no.2, pp.382-387, Feb. 1982.