A simple design of M-channel FIR wavelet-like filter bank

Abstract

In this paper, we propose a simple method for designing M-channel FIR wavelet-like filter banks. Unlike the conventional design of wavelet filter banks, our approach is based on near-perfect-reconstruction (NPR) filter banks, justifying the name "wavelet-like." The major contribution of this paper lies in the technique to impose regularity constraints individually into each filter of the NPR filter bank, yielding more free parameters to design wavelet-like filter banks. Moreover, our method involves no optimization procedure by imposing regularity constraints. The designed 1-regular wavelet-like filter bank possesses good properties as the original NPR filter bank. The 2-regular wavelet-like filter bank can also be obtained preserving the NPR property. Examples are given to numerically illustrate the proposed technique.

Side-lobe interference suppression for DFT filter banks based on improved GSC

“…The research of filter banks is mostly focused on multirate signal processing, such as wavelet filter banks [1][2][3], and cosine modulated filter banks [4][5][6], which are mostly used in data compression. But this technology has difficulty in applying to broadband digital receiver used in electronic warfare, because this kind of filter banks are not designed for signal detection and parameter estimation, as one of the most important job for electronic warfare receiver.…”