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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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pam_ManchesterPulse.vi

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

Summary: Build a LabVIEW subVI to create a prototype Manchester pulse shape.

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: pam_ManchesterPulse.vi

  • Description: Create a prototype Manchester pulse shape. The Manchester pulse is a polar NRZ (non return to zero) that is 1 during the first half of the bit interval and -1 during the second half of the bit interval.
  • Category: Pulse amplitude modulation ("pam" prefix)

Inputs (Controls)

  1. Tb, bit interval [s] (1) -- DBL
  2. fs, sampling frequency [Hz] (10) -- DBL

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

Outputs (Indicators)

  1. pulse shape -- 1-D array of DBL

Required Behavior

  • pulse shape contains Tb times fs sample points.
  • The first half of the output array contains +1, while the second half of the output array contains -1.

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 pam_ManchesterPulse.vi
Figure 1 (subVI_pam_ManchesterPulse-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.

Who can create a lens?

Any individual member, a community, or a respected organization.

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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