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From: | Martin Braun |
Subject: | Re: [Discuss-gnuradio] Full Duplex operation, time synchronization and self interference cancellation |
Date: | Mon, 12 Sep 2016 12:40:56 -0600 |
Pranav,
What you're doing is definitely feasible, but your question is pretty broad. Do you think you gave a good understanding of how the ofdm stuff works internally?
Maybe you'll get more helpful responses if you ask more specific questions.
Cheers,
Martin
Good morning,
Can anyone help me with this? I don't want to use the packet structure as shown in the OFDM example. But I want to use the carrier_allocator and other blocks, and later also perform synchronization of the OFDM signal received.
Thanks and regards,
Pranav PadalkarFraunhofer-Institut für Eingebettete Systeme und Kommunikationstechnik ESK
From: Discuss-gnuradio <discuss-gnuradio-bounces+pranav.padalkar=esk. address@hidden > on behalf of Pranav Padalkar <address@hiddenfraunhofer.de >
Sent: Thursday, September 8, 2016 1:42 PM
To: address@hidden
Subject: [Discuss-gnuradio] Full Duplex operation, time synchronization and self interference cancellationHello all,
I am trying to design a full duplex operation on my USRP3. I have to use OFDM and a defined TDMA scheme for different OFDM symbols. I also have to use a preamble, but it has to be sent once every TDMA frame. I have designed a block which takes care of my TDMA and preamble implementation. Basically, I cannot use packet structure (as given in the OFDM examples). On the transmitter side I am using OFDM carrier allocator, IFFT and OFDM cyclic prefixer(CP).
Since, it has to be full duplex system, on the receiver side I want to perform the synchronization of my received signal with the transmitted signal, and then after removing CP and performing FFT, I have to subtract my received signal from the transmitted signal. I tried to understand the corr_est and corr_sync blocks by going through their examples. But I am not able to understand how can I get the value of offset (after synchronization), so that using that offset value I can shift my TX signal and subtract the RX signal.
I request if some one can point me in the right direction.
Thanks and Regards,
Pranav PadalkarFraunhofer-Institut für Eingebettete Systeme und Kommunikationstechnik ESK
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