Re: [Discuss-gnuradio] FFT beamforming

[Matt Ettus]

On 04/13/2010 08:14 AM, Marcus D. Leech wrote:
> I have a potential application for an FFT beamformer.  5 or 7 antennas,
> 5 or 7 USRP2.
>
> The actual application is fairly narrowband--less than 250KHz wide.
>
> If I lock all the USRP2 to a common source (GPSDO probably) is that
> likely to be good enough
>    for an FFT beamformer?  The computational burden will be quite modest
> of course, since the
>    bandwidth will be 250KHz or less, but what of the required phase
> coherence?
>
> Anyone had any related experience?


You'll need to give a 1 PPS reference in addition to the 10 MHz source. 
 Phase coherence will depend on the daughterboard you use.

Matt