And because the spectrum of the discrete time signal, this very same spectrum will periodically repeat if we prolonged the frequency better over and above $f_s$ these kinds of which the spectrum revealed is usually precisely the same spectrum in every single frequency band from $nf_s$ to $(n+1)f_s$ for any https://pginsector15gurugram.blogspot.com/2025/07/book-modern-pg-for-boys-in-gurgaon.html