An Affine Projection Algorithm for the Identification of Impulse Responses with Symmetric/Antisymmetric Characteristics

This paper aims to present an affine projection algorithm (APA) tailored for the identification of system impulse responses with intrinsic symmetric/antisymmetric characteristics. Such an algorithm uses a combination, based on the Kronecker product decomposition, of two (short length) adaptive filters to efficiently estimate a long length system impulse response. As a result of that, the proposed algorithm outperforms the conventional APA in terms of convergence speed and tracking ca-pabilities. Simulation results are shown and discussed, confirming the improved performance achieved by the proposed algorithm in several operating conditions.