AWR2243: AWR2243 Chirp/Frame Configuration

Hello Gabriel,

Thanks for reaching out.

Let me clarify things for you here.

Gabriel Virbila said:

What is the difference between the CHIRP_START_INDX/CHIRP_STOP_INDX for the PROFILE and FRAME config settings?

Chirp Start and stop index in frame config lists out all the chirps used in a frame whereas, Chirp start and stop index in Chirp config defines the chirps used for a particular profile. 

Say for example, you want 10 chirps in a frame with type/profile A and 10 chirps with type B. In this case, following will be your chirp and frame config : 

Chirp Config -- 

Profile A: Chirp Start Index = 0, chirp End Index = 9

Profile B: Chirp Start Index = 10, chirp End Index = 19

Frame Config -- 

Chirp Start Index = 0, Chirp End Index = 19

Gabriel Virbila said:

The NUM_LOOPS in the FRAME_CONF specifies the number of times that the START/END  INDX are repeated and the NUM_FRAMES specifies the number of times the loop count with start/stop indices are repeated?

Coming to your second question,

Num_Loops defines the number of cycles for Chirp_Start Index and Chirp End Index in the frame config. If we continue on the previous example : 

- Keeping num_loops as 1 : One Frame structure = A,B

- Keeping Num_Loops as 2 : One Frame structure = A, B, A, B

The above only defines the structure for one frame, to increase the number of similar frames, one has to program the NUM_FRAMES parameter.

So say if you want 2 frames with chirp types A and B (10 chirps in each category), with num_loops as 2, Frame structure = 1st frame [A,B,A,B] , 2nd Frame [A,B,A,B]

Hope this clarifies things for you.

Regards,

Ishita