# PAPR in OFDM with gnuradio?

**URL:** <https://www.ruby-forum.com/t/papr-in-ofdm-with-gnuradio/241015>\
**Category:** GNU Radio\
**Created:** [May 9, 2014, 9:08am UTC](https://www.ruby-forum.com/t/papr-in-ofdm-with-gnuradio/241015 "2014-05-09T09:08:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Detlef\_R](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/58f4c7/32.png) [@Detlef\_R](https://www.ruby-forum.com/u/Detlef_R)\
**Post date:** [May 9, 2014, 9:08am UTC](https://www.ruby-forum.com/t/papr-in-ofdm-with-gnuradio/241015/1 "2014-05-09T09:08:25Z")

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hi

how calculate PAPR in OFDM with flow graph?

thanks

BZS

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**Author:** ![casper\_the\_ghost](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/58956e/32.png) [@casper\_the\_ghost](https://www.ruby-forum.com/u/casper_the_ghost)\
**Post date:** [May 9, 2014, 9:22am UTC](https://www.ruby-forum.com/t/papr-in-ofdm-with-gnuradio/241015/2 "2014-05-09T09:22:32Z")

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Hi BZS,

luckily, that’s rather intuitive 🙂 :  
Using the complex to mag squared block you can get the sample “energy”.  
Using the max operation you can find the maximum in your vector  
(==ofdm symbol), using integrate (with a decimation of vector length)  
you get the the total power. The rest is just division.

Greetings,  
Marcus

On 09.05.2014 08:30, 猪猪猪猪猪猪头 wrote:

> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Discuss-gnuradio  
> mailing list [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)  
> [Discuss-gnuradio Info Page](https://lists.gnu.org/mailman/listinfo/discuss-gnuradio)

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