spectral factorization

spectral factorization

[′spek·trəl ‚fak·tə·rə′zā·shən] (mathematics) A process sometimes used in the study of control systems, in which a given rational function of the complex variable s is factored into the product of two functions, FR (s) and FL (s), each of which has all of its poles and zeros in the right and left half of the complex plane, respectively.