Low-Complexity Implementation of the Affine Projection Algorithm

In this letter, a new low-complexity implementation of the affine projection (AP) adaptive filtering algorithm is proposed and investigated by simulation. The proposed algorithm uses a novel low complexity recursive filtering technique and filter update that is incorporated in dichotomous coordinate descent (DCD) iterations. If the projection order is significantly smaller than the filter length L, the complexity of the proposed DCD-AP algorithm is as small as about L multiplications per sample.