[USRP-users] [RFNoC] Listen Before Talking (LBT)

Felipe Augusto Pereira de Figueiredo zz4fap at gmail.com
Tue Oct 3 04:42:10 EDT 2017

Dear All,

I'm thinking of implementing LBT with RFNoC, however, after an initial
study of the RFNoC framework I realized it would be hard to implement
what I had in mind:

Initially, I would start with a very basic approach:
1) Calculate the power received just after the DDC for every received packet
2) If the power is greater than a defined threshold I would disable
the DUC from reading new IQ samples from the dmaFIFO. Disabling DUC
would require a new output signal (DDC) and input signal (DUC).

However, I think the approach with input/output signals would not be
the best one but I don't really have better ideas as I'm quite new to

Now comes the reason why I'm writing this email, I'd like to know if
there is a better approach for this LBT implementation with RFNoC.

Any hint will be very helpful!

Thanks and Kind Regards,

Felipe Augusto

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