FFT beamforming

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?

Cheers


Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org

On 04/13/2010 08:14 AM, Marcus D. Leech wrote:

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

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