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[Discuss-gnuradio] High frequency OFDM
From: |
Joachim Roop |
Subject: |
[Discuss-gnuradio] High frequency OFDM |
Date: |
Mon, 28 Jun 2010 13:37:04 +0200 |
Hi,
I successfully implemented OFDM with two USRPs with LFRX/LFTX at 1-50MHz,
connect by cable. Now I tried switching over to higher frequencies via
TVRX/WBX. While I receive a perfectly valid looking spectrum with a good SNR,
it does not seem to decode at >200MHz.
If I increase the sub-carrier spacing of the transmission and thus the
bandwidth, it works again. But why do I have to do that if the signal and SNR
look okay?
What destroys a OFMD signal at high frequencies? Is it phase noise? Is the
USRPs frequency resolution different at higher frequencies?
Any literature/papers on this topic would also be helpful - I am kind of stuck
here.
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- [Discuss-gnuradio] High frequency OFDM,
Joachim Roop <=