Hi,
I have just received my USRP 2950R and immediately loaded the 'Simple NI-USRP Streaming'-project. After compilation of the Streaming XCVR (FPGA).vi I then launched the Full Duplex Streaming (Host).vi and played around a bit with the settings on the left side.
The program basically just creates a sine tone, sends it to the FPGA through a DMA FIFO and to the TX-antenna, picks it up again at the RX-antenna and sends the received signal back to the host via another DMA FIFO.
However, the maximum sample rate that I could achieve without serious glitching and buffer under/overflows on the FPGA was about 2 MS/s. Isn't that a bit poor? I thought a real time 40 MHz (or more) full duplex-system was realizable with this hardware. Also, there is no own code running on the FPGA just yet, so I imagine after custom signal processing on the FPGA it will even be far less than 2 MS/s.
Does anyone have any information on what data rates are achievable if receiver and transmitter are running simultaneously on one USRP 2950R? Is the sample project too bloated/slow? Am I better off writing an entirely new FPGA.vi?
Thank you very much
