Design and Implementation of Polyphase Fast Fourier Transform Channelizer
Ali J. Ghandour, Ahmad Mansour, Hussein AlAsadi, Walid J. Ghandour · 2020
Modern wideband receivers must be able to slice and dice a large band of the spectrum in real time, while available receivers are increasingly faced with the challenges of providing flexible operations on large number of channels simultaneously. We present in this paper a comprehensive review of major channelizer algorithms available in the literature that are compatible with Software Defined Radio platforms. We employ analytical models to evaluate and compare various channelizer algorithms. Moreover, we implement and simulate the Polyphase Fast Fourier Transform (PFFT) channelizer using MATLAB software. We show using the reported results that PFFT computation complexity is about four times lower than any other channelizer. We also contribute the first hardware implementation of PFFT using Vivado High Level Synthesis. In addition, we provide a clear and practical manipulation of the PFFT structure to enable real-time streaming support taking into account system optimization in terms of hardware resources and latency.