On power-complementary FIR filters

Abstract

Conditions are derived, under which two linear-phase FIR filter transfer functions H(z)and G(z) have the power-complementary property, i.e., |H(e^{j omega})|^{2} + |G(e^{jomega})|^{2} = 1. It is shown that, the constraint of linear phase on the transfer functions strongly restricts the class of frequency responses that can be realized by a power-complementary pair.

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