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NI LabVIEW 2009 Digital Filter Design Toolkit LV2009DFDT数字滤波器设计工具包32位版
数字滤波器工具包Digital Filter Design Toolkit，在LabVIEW安装时是不包含的，需要再单独下载安装。DFDT工具包在DFDT2017及以前的版本中，只有X86系统下的32位版本，从DFDT2018以后才有X64系统下的64位版本。如果需要使用64位的版本，请将LabVIEW环境升级到2018以后。
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NI LabVIEW 2009 Digital Filter Design Toolkit LV2009DFDT数字滤波器设计工具包32位版
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LabVIEW 2009 Digital Filter Design Toolkit Readme
June 2009
This file contains information to introduce you to the LabVIEW Digital Filter Design Toolkit. This file also provides you with help resources you can use while working with the toolkit. The file contains the following information that you need to understand.
Overview
New Features
System Requirements
Installation Instructions
Uninstallation Instructions
Accessing the Help
Finding Examples
Known Issues
Bug Fixes
Overview
The LabVIEW 2009 Digital Filter Design Toolkit is the upgrade version of the LabVIEW 8.6 Digital Filter Design Toolkit. The Digital Filter Design Toolkit provides a collection of digital filter design tools to supplement the LabVIEW Full Development System. The Digital Filter Design Toolkit helps you design digital filters without requiring you to have advanced knowledge of digital signal processing or digital filtering techniques. With the Digital Filter Design Toolkit, you can design, analyze, and simulate floating-point and fixed-point digital filters.
Without prior knowledge about programming in LabVIEW, you can use the Digital Filter Design Express VIs to interact graphically with filter specifications to design appropriate digital filters.
The Digital Filter Design Toolkit provides VIs that you can use to design a digital finite impulse response (FIR) or infinite impulse response (IIR) filter, analyze the characteristics of the digital filter, change the implementation structure of the digital filter, and process data with the digital filter. In addition to the floating-point support, the Digital Filter Design Toolkit provides a set of VIs that you can use to create a fixed-point digital filter model, analyze the characteristics of the fixed-point digital filter, simulate the performance of the fixed-point digital filter, and generate fixed-point C code, integer LabVIEW code, or LabVIEW field-programmable gate array (FPGA) code for a specific fixed-point target.
The Digital Filter Design Toolkit includes VIs for floating-point multirate digital filter design. You can use the VIs to design a floating-point single-stage or multistage multirate filter, analyze the characteristics of the floating-point multirate filter, and process data with the floating-point multirate filter. In addition to the floating-point filter design, the toolkit also provides a set of VIs that you can use to create a fixed-point multirate filter, analyze the characteristics of the fixed-point multirate filter, simulate the behavior of the fixed-point multirate filter, and generate LabVIEW FPGA code from the fixed-point multirate filter for NI-RIO targets.
In addition to the graphical tools for digital filter design, the toolkit also provides Digital Filter Design MathScript RT Module functions that LabVIEW MathScript supports. These functions enable you to design filters in a text-based environment. You must install the LabVIEW MathScript RT Module to use the Digital Filter Design MathScript RT Module functions.
New Features
The LabVIEW 2009 Digital Filter Design Toolkit supports the fixed-point data type.
The LabVIEW FPGA code you generate with the LabVIEW 2009 Digital Filter Design Toolkit supports only the fixed-point data type.
You can generate LabVIEW FPGA code for any installed FPGA target by using the Start IP Generator dialog box. You can use this dialog box to configure filter implementation settings interactively.
You can implement fixed-point single-rate FIR filters by using the multiply-accumulate method or the distributed arithmetic method, which you can specify in the Start IP Generator dialog box.
You can implement multi-channel fixed-point cascaded integrator comb (CIC) filters.
You can save a multistage multirate filter into a file. You also can retrieve a multistage multirate filter from a file.
You can save a multistage multirate filter into a text file in XML format. You also can retrieve a multirate filter or multistage multirate filter from an XML file.
The DFD Get Filter Structure VI now is on the Utilities palette.
The LabVIEW 2009 Digital Filter Design Toolkit renames all Digital Filter Design MathScript RT Module functions. These changes do not affect your existing applications.
System Requirements
The computer you are using must meet the minimum system requirements to run the Digital Filter Design Toolkit:
Note: If you want to use the LabVIEW 2009 Digital Filter Design Toolkit to generate LabVIEW FPGA code for a fixed-point digital filter, you must install the LabVIEW 2009 FPGA Module and NI-RIO software on the host computer. Ensure that you install the FPGA Module and NI-RIO software before you install the Digital Filter Design Toolkit. If you already installed the Digital Filter Design Toolkit, uninstall the Digital Filter Design Toolkit before installing the FPGA Module and NI-RIO software.
Installation Instructions
You can install all of your LabVIEW products—including the Digital Filter Design Toolkit—using the LabVIEW 2009 Platform DVDs. You can find installation instructions for the Digital Filter Design Toolkit along with activation instructions in the following locations:
LabVIEW Release Notes, which are available in your LabVIEW software kit.
LabVIEW 2009 Platform DVDs Readme, which is available on the top-level of LabVIEW Platform DVD 1.
To request additional LabVIEW 2009 Platform DVDs, refer to the National Instruments Web site.
Uninstallation Instructions
Complete the following steps to uninstall the Digital Filter Design Toolkit.
Open the Add or Remove Programs dialog box from the Control Panel.
Select National Instruments Software and click the Change button.
Under NI Products, select NI LabVIEW 2009 Digital Filter Design Toolkit and click the Remove button.
Accessing the Help
Refer to the LabVIEW Help, accessible by selecting Help»Search the LabVIEW Help from the pull-down menu in LabVIEW, for information about using the Digital Filter Design Toolkit. On the Contents tab of the LabVIEW Help, choose Toolkits»Digital Filter Design Toolkit. This book contains:
Concepts—An overview of how to use the Digital Filter Design Toolkit.
How-To—A step-by-step tutorial on designing floating-point and fixed-point filters using the Digital Filter Design Toolkit.
VIs—Detailed information about the Digital Filter Design VIs.
MathScript RT Module Functions—Detailed information about the Digital Filter Design MathScript RT Module classes of functions and commands that LabVIEW MathScript supports.
Finding Examples
LabVIEW examples for the Digital Filter Design Toolkit are located in the labviewexamplesDigital Filter Design folder. You can modify an example VI to fit an application, or you can copy and paste from one or more examples into a VI that you create.
You also can find example VIs using the NI Example Finder. Select Help»Find Examples to launch the NI Example Finder. You also can click the arrow on the Open button on the LabVIEW dialog box and select Examples from the shortcut menu to launch the NI Example Finder.
Use the Browse or Search page of the NI Example Finder to find an example VI. In the Browse page, the Digital Filter Design Toolkit examples are located in the Toolkits and Modules»Digital Filter Design folder.
Known Issues
You can access the software and documentation known issues list online. Refer to the National Instruments Web site for an up-to-date list of known issues in the Digital Filter Design Toolkit.
Bug Fixes
The following items are the IDs and titles of a subset of issues fixed in the Digital Filter Design Toolkit. If you have a bug ID, you can search this list to validate that the issue has been fixed. This is not an exhaustive list of issues fixed in the current version of the Digital Filter Design Toolkit.
| Bug ID | Fixed Issue |
| 135615 | DFDT generates wrong LabVIEW FPGA code for moving average filters, when both the conversion rate and the number of channel are 1. |
| 136195 | DFDT generates wrong LabVIEW FPGA code for CIC filters in some cases. |
| 140908 | The implementation of nearest in CIC simulation is wrong. |
Copyright
© 2009 National Instruments Corporation. All rights reserved.
Under the copyright laws, this publication may not be reproduced or transmitted in any form, electronic or mechanical, including photocopying, recording, storing in an information retrieval system, or translating, in whole or in part, without the prior written consent of National Instruments Corporation.
National Instruments respects the intellectual property of others, and we ask our users to do the same. NI software is protected by copyright and other intellectual property laws. Where NI software may be used to reproduce software or other materials belonging to others, you may use NI software only to reproduce materials that you may reproduce in accordance with the terms of any applicable license or other legal restriction.
Trademarks
National Instruments, NI, ni.com, and LabVIEW are trademarks of National Instruments Corporation. Refer to the Terms of Use section on ni.com/legal for more information about National Instruments trademarks.
Other product and company names mentioned herein are trademarks or trade names of their respective companies.
Patents
For patents covering the National Instruments products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National Instruments Patent Notice at ni.com/patents.
