The biggest peak will be at 110, which is closest to 105.1 Hz, but it's a "crude" estimate, so you can't expect it to be precise.
I know that with this resolution i can not expect precise and Sharp peak but in this scenario(with this sample rate and Number of sample) if i want to find Energy that distributed to near frequency(I have some "signal" at 80 Hz, some at 90 Hz, some at 100 Hz, some at 110 Hz, some at 120 Hz) which estimation is good whether taking Quadratic mean or just average that can give me magnitude near to 0,7071. That is the problem i am facing.
wrote: Suppose you sample 20,000 points at 1 kHz, for a resolution of 0.05 Hz. Your FFT would be a single "sharp" peak, with magnitude of 0.7071 (which you might realize is sqrt(2)/2, the correct answer)
In this case my acquisition become slow and i read data or update graph after every 20 Sec (Because 1k sample rate and 20k Sample to read). I am doing computation on fly so i want acquisition to be fast and once measurement taken, I shift to next frequency.