# PTAR in OFDM

**URL:** <https://www.ruby-forum.com/t/ptar-in-ofdm/231464>\
**Category:** GNU Radio\
**Created:** [August 9, 2014, 4:43pm UTC](https://www.ruby-forum.com/t/ptar-in-ofdm/231464 "2014-08-09T16:43:34Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [August 9, 2014, 4:43pm UTC](https://www.ruby-forum.com/t/ptar-in-ofdm/231464/1 "2014-08-09T16:43:34Z")

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hi,  
if i want to measure the PATR(peak-to average radio)in OFDM system,  
is there any existed block about this?  
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:** [August 9, 2014, 4:52pm UTC](https://www.ruby-forum.com/t/ptar-in-ofdm/231464/2 "2014-08-09T16:52:31Z")

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Hi BZS,

haven’t heard from you in a while!  
I think you’re referring to a measure usually called PAPR  
(Peak-to-Average power ratio)  
and I’ve answer this question that you’ve asked on the 9th of May back  
then already:  
[http://lists.gnu.org/archive/html/discuss-gnuradio/2014-05/msg00159.html](http://lists.gnu.org/archive/html/discuss-gnuradio/2014-05/msg00159.html)  
So if that answer wasn’t quite satisfactory, please explain your  
question in a little more detail.

All the best,  
Marcus