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Sorry if my terminology is not clear - hopefully someone here can set me straight!

I'm searching for SDR software/hardware that can accept two (or more) separate antenna inputs simultaneously, each clocked with the same source (so the two or more antenna inputs are detected coherently), render each to I/Q, and then process/demodulate the two or more I/Q streams so that the signals can be correlated. Not sure where to start looking, so thought I'd start here as Softrock was my first SDR long ago.

Goal in any event is to receive the same section of spectrum using two different (but nearby) antennas, and favor signals that appear in frequency/phase at both antennas.

Thanks,

Dave

It's a different hardware platform, but there is active work on a 2 antenna
setup.



Check out the thread and the Hermes-Lite 2 hardware.

73, KD7HGL
Josh

On Sun, Jan 10, 2021, 9:35 PM David Feldman via groups.io <wb0gaz=
[email protected]> wrote:

Sorry if my terminology is not clear - hopefully someone here can set me
straight!

I'm searching for SDR software/hardware that can accept two (or more)
separate antenna inputs simultaneously, each clocked with the same source
(so the two or more antenna inputs are detected coherently), render each to
I/Q, and then process/demodulate the two or more I/Q streams so that the
signals can be correlated. Not sure where to start looking, so thought I'd
start here as Softrock was my first SDR long ago.

Goal in any event is to receive the same section of spectrum using two
different (but nearby) antennas, and favor signals that appear in
frequency/phase at both antennas.

Thanks,

Dave

Hi Dave,
Again, different platform, receive only is the SDRPLAY DUO it has 2 separate receivers. And the software SDRUNO that can do this type of correlation.

and
You can see SDRUNO here.

Hope this helps
-Guy

This is not a SoftRock style, but a direct sampling receiver. It offers two channels and it is likely the cheapest option around. I believe LinRad samples both channels and it offers diversity reception and automatic phasing.

Goal in any event is to receive the same section of spectrum using two different (but nearby) antennas, and favor signals that appear in frequency/phase at both antennas.

Dave

You do not say what frequencies you are wanting.

The cheap RTL dongles are incorporated in several receivers. ,are%20running%20from%20a%20single%20clock%20source%20(coherent).

Scroll down there are links to seveeal.

73 Alan G4ZFQ

Thanks, Alan - I *knew* something was missing from my post!!!

My work is in the low ham bands - primarily 470 kHz to 7.3 MHz working range.

The links offered in this thread are very much appreciated!

Dave

You might look at the KerberosSDR it has the equivalent of 4 SDR sticks
running coherently linked to a single USB port that will connect to
raspberry pi or other linux computer. The designers have videos posted
using it to do radio location.

On Sun, Jan 10, 2021, 10:35 PM David Feldman via groups.io <wb0gaz=
[email protected]> wrote:

Sorry if my terminology is not clear - hopefully someone here can set me
straight!

I'm searching for SDR software/hardware that can accept two (or more)
separate antenna inputs simultaneously, each clocked with the same source
(so the two or more antenna inputs are detected coherently), render each to
I/Q, and then process/demodulate the two or more I/Q streams so that the
signals can be correlated. Not sure where to start looking, so thought I'd
start here as Softrock was my first SDR long ago.

Goal in any event is to receive the same section of spectrum using two
different (but nearby) antennas, and favor signals that appear in
frequency/phase at both antennas.

Thanks,

Dave