Implementation of Polyphase Channelizers for Multirate Signal Analysis

Polyphase discrete-Fourier transform (DFT) filter banks are used in a wide variety of applications involving the channelization and analysis of multi-component signals. Of particular interest are oversampled architectures that enable high-fidelity demodulation and signal processing of channelized signals. In this paper, we examine architectures of polyphase DFT filter banks that are suitable for field programmable gate array (FPGA) implementation and discuss implementation issues that arise in high speed, realtime applications.