Regarding Labview software version and block used in image

[jay524]

Hi GerdW,

First of all really thakyou for helping me.I want you to ask few question could you please tell me what are the block used after FFT block , and if my input chirp signal descripation are as fallows carrier freq= 1G , IQ=500K, Sampling freq = 10M, Chirp B.W= 10M then what should i keep low pass filter cutoff freq and samplinf freq , also there are lots of window function which should i use, and please tell me the block which is below the dechirp signal and where i can find it in labview.

Thanks for helping me once again. 

[GerdW]

Hi Jay,

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@jay524 wrote:

1. what are the block used after FFT block
2. if my input chirp signal descripation are as fallows carrier freq= 1G , IQ=500K, Sampling freq = 10M, Chirp B.W= 10M then what should i keep low pass filter cutoff freq and samplinf freq
3. also there are lots of window function which should i use
4. the block which is below the dechirp signal and where i can find it in labview.

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1. It's an Abs() function...
2. I don't know. What did you learn at your university about signal theory? Ask your co-students or the teacher!
3. I don't know. What did you learn about signal theory? What does your teacher recommend?
4. I don't know. I never used NXG and your image is very blurry...

[jay524]

I am facing problem regarding one block in Labview NXG can you please tell me which block is below de-chirp signal , i mean the block before  where amplitude response is written in image.

[GerdW]

Hi Jay,

you still don't provide a better image, the current one is quite blurry!

I guess this might be same scaling function, like converting to a dB scale for the amplitude response display. You need a logarithm function and a multiply to calculate dB values…