文档介绍：Application Note 097
Designing Filters Using the NI LabVIEW Digital
Filter Design Toolkit
Introduction
The importance of digital filters is well established. Digital filters, and more generally digital signal processing (DSP)
algorithms, are classified as discrete-time systems. They monly implemented on a general puter,
on a dedicated DSP chip, or in a Field Programmable Gate Array (FPGA) chip. Because of their well-known
advantages, digital filters are often replacing classical analog filters. In this application note, we introduce a new digital
filter design and analysis tool with which developers can work within a graphical development environment to
interactively design, analyze, and implement digital filters. Highlights of the software include the ability to work with
live signals to facilitate real-world filter testing and the ability to automatically generate LabVIEW and ANSI C code
for targeting a DSP, an FPGA, or other embedded systems.
Digital Filter Design Process
Digital filters are used in a wide variety of signal processing applications, such as spectrum analysis, digital image
processing, and pattern recognition. Digital filters eliminate a number of problems associated with their classical
analog counterparts and thus are preferably used in place of analog filters. Digital filters belong to the class of
discrete-time LTI (l