Phaser: Help Needed For MIMO Setup

There's a couple of options for how you could modify Phaser:

1.  Install SMP connectors on the existing footprints.  Then cable out to your own 2D antenna (i.e. 2x4 array, "T" array, or circular array).  Then you can scan in both azimuth and elevation.

2.  You can use the 2nd transmit port, but not simultaneously.  So this is something for creating virtual arrays -- which increase the angular resolution at the expense of scan time.  In our example code, you can see how these GPIOs are set.  But it would not give you a 2 D array, which I think is what you are wanting.  

3.  You could add a full transmit array by attaching the ADAR1000 eval board to Phasers TX OUT port.  That would give you 4 channels of transmit beamforming.  But again, not a 2D scanning array.  

These are just ideas that are possible.  But the actual implementation and testing would need to be worked on by you, we do not have example code of these.  I hope that helps.  

2nd Options sounds like what I want to do, However I want to do that with time division multiplexing (TDM). I want to know how can I use phaser to achieve this.

Hey Jon, to turn on "end of PLL ramp status" on ADF4159 MUXOUT I made these changes,

There would be no way to distinguish between which Tx1/2 aligned with which rx buffer.  Instead, I would just do this command immedciately after every rx data capture:

my_phaser._gpios.gpio_tx_sw = 0            # 0 = TX_OUT_2     1 = TX_OUT_1

Jon.Kraft said:

There would be no way to distinguish between which Tx1/2 aligned with which rx buffer.

Is this a hardware or a software limitation?

Anyways, Could you please confirm this?

KetanP said:

I am expecting that this will toggle the TX_Switch every 128 chirps.