Suppose that $f(t): \mathbb{R} \to \mathbb{C}$ is a $T$-periodic signal, with highest frequency $f_h$. Now suppose that our sampling rate frequency is lower than $f_h$, and is not any multiples of $1/T$. Furthermore, we use discrete Fourier transform, meaning that we will only be taking $N$ samples, which are of finite quantity.
What will be the formula for alias of DFT in such a case?