MMWCAS-RF-EVM: amplitude difference of the chirp is too large

Hi Chen,

Thanks for reaching out to us over E2E.

Let me reassign your to an expert.

Regards,
Anirban

Hi Chen,

            Can you please confirm that above data is from the TI CAS RF EVM and CAS DSP EVM? If so the this is a known issue that the first chirp data has to be ignored as is corrupted.

Regards

Abhed

yes,the data is from MMWCAS-RF-EVM and MMWCAS-DSP-EVM.The horizontal axis is the number of chirps, and the vertical axis is the number of samples. However, this issue occurs not only on the first chirp, but also on frames other than the first one

Chen,

         the first chirp of every frame has to be discarded. Do you see this in other chirps too?

Regards

yes,can you help me to resolve this problem?

hi Abhed ,You may not understand my question.My problem is that chirp is normal when my configuration is chirpperloop=12,numloop=128. However, when I configure chirpperloop = 32 or numloop=255, the chirp amplitude is different for each frame. My problem is that chirp is normal when my configuration is chirpperloop=12,numloop=128. However, when I configure chirpperloop = 32 or numloop=255, the chirp amplitude is different for each frame.

Hi Chen,

              Did you try reducing the number of chirps or loops? Also please confirm when you say chirp amplitude is difference for each frame, then is it just the first chirp or every chirp? If it is first chipr then my previous statement stands ture irrespectively.

I have tried to reduce chirp and loop, chirp is normal only when chirpnum =12,loopnum=128, in other configurations there are a lot of chirp in a frame with different amplitude, this is not the first chirp. I need to transmit a large number of chirp in one frame, numchirp=12,numloop=128 configuration does not meet my needs.