IWR1443: Dynamic Chirp Burst using mmWaveStudio

Jafar,

Could you please elaborate on what is different for each 128 Bursts of Chirp1,2... 30?

Thanks and regards,

CHETHAN KUMAR Y.B.

Thank you for your reply dear Chetan.

Let me elaborate on what exactly I am seeking for. This is actually another scenario but kinda similar to the one I asked in my first question.

Lets say I have three chrips, C1, C2 and C3. They all have the same start frequency (let's say 76 GHz) but they're different in which TX they use. C1 has only TX0 on, C2 has only TX1 on and C3 has TX2 on.

Let's define a sequence as S1 = C1 C2 C3. These three chirps together.

Now I want to repeat this sequence for 128 times. After that I want to change the start frequency of those three chirps (increase it 400MHz to 76.4GHz) form a new sequence of C4 C5 C6 and repeat the aforementioned scenario (sending the sequence of 128 times.) Note that:

C4 = C1 with 0.4GHz frequency shift

C5 = C2 with 0.4GHz frequency shift

C6 = C3 with 0.4GHz frequency shift

And repeat this procedure 10 times overall (10 frequency starts).

Is this doable? mmWaveStudio specifies that start frequency can be different for each chirp so I guess it should be doable.

What parameters do I need to modify to achieve such configuration?

And if this is not doable, let's say I want to send my chirps as described in the picture I provided in my first post. Each of 30 chirps may only have different start frequency (0.5GHz tops compared to the previous chirp) and different enabled TX. The sequencing is not really important but I do want 128 (or less like 64 or 32) of the same chirp to be sent after one another.

Thank you in advance.

HI, Jafar:

You can check this document for some information.  

https://www.ti.com/lit/an/swra553a/swra553a.pdf

See whether it is helpful.

Best,

Zigang

Thank you dear zigang. It was indeed helpful. I understood that I need to use the advanced frame configuration. However, I'm still a bit confused about it.

I would appreciate if you could confirm that my following statement is correct:

Let's simply things. Let's say I have 4 chirps, each sharing a same profile with each other but they have different TXs enabled and small differences in start frequency. I want to have something like this:

Are setting below correct to achieve such chirp sequences? Have I set the NumLoops correctly?

-----------------------------------------------------------------------------------------------------------------------

I also have another question regarding creating new chirps in mmWave Studio. 

Is the parameter Start Freq Var with respect to its Profile Id? Or is it with respect to the previous chirp in chirp memory? In other words, let's say I want 3 chirps as following:

C1: starts at 76 GHz 

C2: starts at 76.4 GHz, everything else same as C1

C3: starts at 76.8 GHz, everything else same as C1

Is this possible by using only one Profile ID and just by using the Start Freq Var?

Thank you in advance,

Jafar.

Thank you for your reply.

So the chirp start frequency variation is with respect to the values in corresponding profile, and not the value in the previous index chirp.

8 start frequencies is fine too, given that I can at least change the BPM of each chirps for each individual chirp; then I can get 8*3 = 24 different chirps. Is this possible?

Also thank you for referring to the documentations. They are really helpful.

Kindest regards,

Jafar.