Continuous-time adaptive filter structure

Adaptive filters have been traditionally developed in a digital environment which involves large number of computations to get the coefficients that make the desired approximation. Most of the time, this calculations required a great capacity machines and that is not practical for some applications like channel equalization in cellular systems. This paper proposes a continuous-time adaptive filter which is based on representing the impulse response of adaptive filter as a linear combination of a set of orthogonal exponentials. An important practical advantage of it is that if a satisfactory representation can be obtained by exponentials and simple filter structures can be synthesized.