Skip to content Skip to navigation

Connexions

You are here: Home » Content » util_MeasureBER.vi

Navigation

Lenses

What is a lens?

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.

This content is ...

In these lenses

  • 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"

    Comments:

    ""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 […]"

    "Starting point collection that gathers all modules from this course"

    Click the "LabVIEW Digital Communications" link to see all content selected in this lens.

    Click the tag icon tag icon to display tags associated with this content.

Recently Viewed

This feature requires Javascript to be enabled.

Tags

(What is a tag?)

These tags come from the endorsement, affiliation, and other lenses that include this content.
 

util_MeasureBER.vi

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

Summary: Build a LabVIEW subVI to measure the bit error rate (BER) between two bitstreams.

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: util_MeasureBER.vi

  • Description: Measure the bit error rate (BER) between two bitstreams. This subVI is commonly used to compare a transmitted bitstream to a received bitstream after passing through a noisy channel.
  • Category: General-purpose utility ("util" prefix)

Inputs (Controls)

  1. bitstream A -- 1-D Boolean array
  2. bitstream B -- 1-D Boolean array

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

Outputs (Indicators)

  1. error bitstream -- 1-D Boolean array
  2. BER, bit error rate -- DBL
  3. error count -- I32
  4. array size mismatch -- Boolean

Required Behavior

  • A bit error is defined as any discrepancy between bitstream A and bitstream B at each array index. The output error count indicates the total number of bit errors.
  • The error bitstream output indicates T (true) at each index value where a bit error occurred. Absence of bit errors is indicated by F (false).
  • The bit error rate (BER) is calculated as the total number of bit errors divided by the bitstream length. The bit error rate is reported as NaN ("Not a Number") if the two inbound bitstreams do not have the same length.
  • The output array size mismatch will be active (T) when the two bitstreams do not have the same length.

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 util_MeasureBER.vi
Figure 1 (subVI_util_MeasureBER-vi.htm)

Content actions

Download module as:

PDF | EPUB (?)

What is an EPUB file?

EPUB is an electronic book format that can be read on a variety of mobile devices.

Downloading to a reading device

For detailed instructions on how to download this content's EPUB to your specific device, click the "(?)" link.

| More downloads ...

Add module to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

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.

| External bookmarks