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  • LabVIEW Digital Communications display tagshide tags

    This module is included inLens: Analog / Digital Communications with National Instruments LabVIEW
    By: Sam ShearmanAs a part of collections: "SubVI Specifications for "Communication Systems Projects with LabVIEW"", "Communication Systems Projects with LabVIEW"

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    ""Communication Systems Projects with LabVIEW" features ten projects that draw upon a library of over 40 subVIs constructed as part of the project activities. Each module in this manual completely […]"

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bpm_ReceiverFilter.vi

Module by: Ed Doering. E-mail the authorEdited By: Erik Luther, Sam Shearman

Summary: Build a LabVIEW subVI to remove out-of-band signals at the front end of a receiver.

Table 1
LabVIEWtop.png This module refers to LabVIEW, a software development environment that features a graphical programming language. Please see the LabVIEW QuickStart Guide module for tutorials and documentation that will help you:
• Apply LabVIEW to Audio Signal Processing
• Get started with LabVIEW
• Obtain a fully-functional evaluation edition of LabVIEW

Note:

Visit LabVIEW Setup to learn how to adjust your own LabVIEW environment to match the settings used by the LabVIEW screencast video(s) in this module. Click the "Fullscreen" button at the lower right corner of the video player if the video does not fit properly within your browser window.

LabVIEW SubVI: bpm_ReceiverFilter.vi

  • Description: Remove out-of-band signals at the front end of a receiver using a bandpass filter tuned to the carrier frequency and with a bandwidth that matches the bandwidth of the transmitted signal.
  • Category: Bandpass modulation ("bpm" prefix)

Inputs (Controls)

  1. signal in -- waveform
  2. center frequency [Hz] (1000) -- DBL
  3. bandwidth [Hz] (100) -- DBL
  4. order (10) -- I32

Parentheses ( ) indicate default value; square brackets [ ] designate units.

Outputs (Indicators)

  1. signal out -- waveform

Required Behavior

  • signal in is filtered by an elliptic bandpass filter to produce signal out
  • The elliptic filter characteristics (center frequency, bandwidth, and order) may be adjusted.

LabVIEW Coding Tips

View the screencast video in Create a SubVI in LabVIEW to learn the mechanics of subVIs.

Refer to the Figure 1 screencast video for LabVIEW coding tips and techniques specific to this subVI.

Figure 1: [video] LabVIEW coding tips and techniques for bpm_ReceiverFilter.vi
Figure 1 (subVI_bpm_ReceiverFilter-vi.htm)

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Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

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What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

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