I want to do a direction finding application in the 462 Mhz spectrum (FRS, GMRS), and need a coherent set of receivers to process the signals. Preferably from 3 or four antennas. The bandwidth is only 200 Khz for the whole band.
My questions are: Can I use 4 receivers with a USRP?
What receiver solution can I use that will maintain the phase relationship between the antennas? Is anyone working on such a thing. I unfortunately, am a software guy who knows little about RF design. I gather the current TVRX won't work because of the individual local oscillators.