> It seems that they just has a difference on the magnitude.
>
> P.S. It is a OOK signal on receiver.
>
> The wave on oscillograph can be found on the following link:
>
>formatting link
>
> Thanks in advance!
I don't see 'the same frequency'. I see a square wave signal with a period of 200 µS and noise at approx. 50x the signal fundamental.
What sort of time and/or phase error can you live with? Its possible that a simple low pass filter followed by level detection will do the trick.