Thats the path I'm on, Eric. I've done simulations in Simulink and tested the concept in FPGA with two differente views:
1 - 100% analytical (no manipulation of any phisical caracteristics of the IF signal) 2 - Changing the phase of LO (NCO) according to some cost function. It seems to work...(its not real-time, but works) Angilberto. --- Eric Blossom <[EMAIL PROTECTED]> wrote: > On Tue, Dec 20, 2005 at 03:30:56PM -0500, Marcus > Leech wrote: > > > Paul Shuch was working on a phased-array panel > antenna for > > SETI work. I don't know how many elements, but > it was > > steered using varactors. For some environments, > this would > > be really nice--no need to build mechanicals to > swing a dish > > around. > > > > On the down side, a phased-array patch antenna is > potentially a lossy > > thing, so useless for weak-signal work like EME > and radio astronomy. > > Unless you have an LNA at every element in the > array. Which maps into > > $$$. > > For narrow-band arrays (bandwidth < 1% of center > freq), we think we > can steer the array with DSP in the FPGA and/or > host. This would > allow us to build 4 antenna arrays with a single > USRP. > > Good introductory textbook: "Adaptive Array > Systems", Allen & Ghavami, > ISBN 0-470-86189-4 > > Eric > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
