Re: [Discuss-gnuradio] USRP hardware purchase

[Eric Blossom]

On Wed, Aug 15, 2007 at 06:56:17PM -0700, Dan Halperin wrote:
> 
> On top of that, an (extremely, I think) optimistic lower bound for
> latency in a GNU radio system is over 1 millisecond from the RX antenna
> through the FPGA over the USB to the computer to your software back over
> the USB and out the TX antenna. This makes it _reallllllly_ hard to get
> the 10 _microsecond_ turnaround required for an 802.11b ACK, and carrier
> sense is meaningless with such a latency.

I think 100us is possible if you're mindful of the buffer sizing.

I concur that 10us is not going to happen on the host ;)

Eric