Uplink & downlink at the same channel frequency


Since the LimeSDR is a full duplex radio, has anyone here attempted self-interference cancellation on the FPGA to transmit and receive at the same channel frequency?

I haven’t, but am very much interested in making the FPGA modifications for items like this and other accelerated processing.

@rohkes, I just compiled v1.4 gateware. It looks like only 17% of the Cyclone IV LE’s are being used at the moment, so there should be plenty of room to add on-board real-time signal processing.

@Kryan92 this paper (https://arxiv.org/pdf/1607.01912.pdf) seems to indicate the need of active analog cancellation as well as digital. I don’t think this would be possible with the current version of the limesdr but if there were programmable analog elements then the limesdr would probably be a very good platform for further research into this. Although, I don’t know of any way in which we could make configurable analog elements for something like this.