reference design
Modeling and synthesizing large ratio rate adapters
Design source examples
Decimating or interpolating by ratios of less than two can lead to large ratios of required interpolation and decimation that would be inefficient if implemented as cascaded filters. This document examines an algorithmic solution for minimal hardware and efficient implementation of such large ratio rate adapters.
What you get
The zipped folder contains a design source code example with a simple testbench and an Application Note detailing the design of a 37/50 rate adaptor that can be applied to any large ratio rate conversion.
downconverter.cpp - The core implementation in C++
downconverter.h - A header file for the implementation
linear.cpp - A C++ implementation of linear interpolation with no filtering
script.tcl - A script for Catapult® HLS
tb_downconverter.cpp - A testbench for the implementation (for C++ testing and reuse with the RTL)
Application Note - Modeling and Synthesizing Large Ratio Rate Adapters