IWR6843ISK-ODS: Chirp based phase shifter in TDM mode

HI, Grigor:

You will need to apply different phase to different chirp in the frame. This phase vector should be psuedo-random, and you can program through the red box below.  You can define many chirps, and set numLoop to be 1.   

Best,

Zigang

Hi Zigang!

Thank you!

I try to activate phase shifter but it was failed with message (look at picture below):

"API IS ISSUED FOR A NON AWR1243 DEVICE"

I use IWR6843ISK-ODS + DCA1000. Coud you say what am I doing wrong ?

Is it because of inappropriate radar model or inappropriate parameters?

Best,

Grigor Mardiyan

1. As example, if I have the following parameters in SensorConfig:

It is TDM-MIMO mode with Tx0 and TX1 chirp alternating each other. I want to set phases for every chirp for every transmitter in a frame.

Could you please say how this table should look like for this case? Because in this case I get the same error "API IS ISSUED FOR A NON AWR1243 DEVICE".

Best,

Grigor Mardiyan

Also when I press "Manage Phase Shifter" I get a message.

Is it ok?

Below I try to configure 4 chirps only for Tx0 (without Tx1) with "No of Chirp Loops" = 1.

But even in this case I get the same message when I try to activate phase shifter.

Could you please say what is wrong here ?

HI, there:

Let me spend some time to investigate this problem.  At the same time, you can try to use multiple profile configuration to program different phase. Then program each chirp using a different profile ID.

Best,

Zigang

Thank you! I will wait!

Sounds good.  I will get back to you in the middle of next week.

Best,

Zigang

Thank you!

In accordance with your recommendation I made different profile ID to different chirps, but unfortunately got the same error:
"API IS ISSUED FOR A NON AWR1243 DEVICE"

Just in case, I use TI6843ISK-ODS REV C.

Best regards,

Grigor Mardiyan

Hi, there:

I meant to use regular chirpCfg API, and then program different profile for different chirp. 

Best,

Zigang

Dear Zigang,

Thank you so much, this approach works!

I will be grateful if you also explain the error, which I mentioned above.

Because it is impossible to create more than 16 profile IDs or even 4 in ChirpManager, while I need 256 chirps per frame.

Best regards,

Grigor Mardiyan

HI, there:

Can you use LUA script?

Here is what I received from the firmware team

For static setting of per-chirp phase shifters you need to use the below. 

                ar1.SetMiscConfig (to enable any per-chirp phase shifter feature)             

                ar1.SetPerChirpPhaseShifterConfig (to configure static setting of per-chirp phase shifters)

Let me know if it is helpful.  

Best,

Zigang

Thank you, Zigang!

I figured out. Now it works well!

Best regards,

Zigang