# OFDM Receiver example In Gnuradio

**URL:** <https://www.ruby-forum.com/t/ofdm-receiver-example-in-gnuradio/260113>\
**Category:** GNU Radio\
**Created:** [August 10, 2020, 2:38pm UTC](https://www.ruby-forum.com/t/ofdm-receiver-example-in-gnuradio/260113 "2020-08-10T14:38:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Mousi](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/c4cdca/32.png) [@Mousi](https://www.ruby-forum.com/u/Mousi)\
**Post date:** [August 10, 2020, 2:38pm UTC](https://www.ruby-forum.com/t/ofdm-receiver-example-in-gnuradio/260113/1 "2020-08-10T14:38:24Z")

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Hallo,  
I have a question related to the ofdm receiver example in gnuradio.  
I put a delay block before Schmidl\_Cox synchronizer and I changed it. After 7 samples delay the system beginns to produce errors and for the delay of 9 samples the system is dropped.  
Did we miss the trigger signal because of the delay or there is another reason.  
I am doing this in the baseband and without the RF transmission.  
I want to check the system if there are a degradation effects, like delay ,frequency offset.  
I have uploaded a foto of it.  
Thanks !  
[20200802\_165407|690x143](https://www.ruby-forum.com/uploads/short-url/jyq6rSBFSP25BdihhbuyxqZVbiv.jpeg)