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Generation of a cyclic prefix in OFDM schemes

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‎01-29-2014 05:21 PM
Last Edited by: PeanutButterOven ‎01-27-2017 03:40 AM

Products and Environment

This section reflects the products and operating system used to create the example.

To download NI software, including the products shown below, visit ni.com/downloads.

    Software

  • LabVIEW

Code and Documents

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Overview

Generation of a cyclic prefix for an OFDM baseband signal.

 

Description

Cyclic prefixes are used as a guard interval when we have channel imperfections causing the signal to be delayed. In order to create this prefix, we need to take out the last part of the signal and added at the beginning of the OFDM. The amount of information added is dependent of the user or receiver. Normally, the receivers discard these prefixes, however is a great tool to maintain the protect the signal.

 

Requirements

LabVIEW 2012 (or compatible)

 

Steps to Implement or Execute Code
1. Open the "Cyclic Prefix Generation for a OFDM scheme LV2012 - NI Verified.vi"
2. Select the amount of signal that you would like to add as the prefix. Please note that is a percentage.
3. Verify the OFDM baseband is the desired one.
4. Run the code.

 

Additional Information or References

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Applications/Systems/Test
National Instruments | AWR Group

Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.

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