A novel multirate adaptive FIR filtering algorithm and structure

A new class of FIR ltering algorithms and VLSI architectures based on the multirate approach were recently proposed. They not only reduce the computational complexity in FIR ltering, but also retain attractive implementationrelated properties such as regularity and multiply-and-accumulate (MAC) structure. In addition, the multirate feature can be applied to low-power/high-speed VLSI implementation. These properties make the multirate FIR ltering very attractive in many DSP and communication applications. In this paper, we propose a novel adaptive lter based on this new class of multirate FIR ltering structures. The proposed adaptive lter inherits the advantages of the multirate structures such as low computational complexity and low-power/high-speed applications. Moreover, the multirate feature helps to improve the convergence property of the adaptive lters.