According to Sampling theorem, in order to reconstruct a signal we need to sample it at the rate => twice the highest frequency component of that signal. (provided signal is band limited).
Let's say, we have a signal with f= 2MHz (highest freq component), so we will be sampling it at 4MHz or more as Sampling theorem say's.. and we will have N Samples in signal.
Now, what if I want to know the exact value of a sample (information) between two samples..??
How can we find the value at every possible instantaneous.. in a signal..when we know we only have N samples after sampling..??
I know we can increasing sampling rate to have more sample. But is there any other way to do it..?
This question was asked to me in an interview at NCRA-TIFR, Pune, India.