Facing issues in understanding signal representation in this form x(n,k) and not able to get relation between n & k in simple terms.

Any links or guidance will help in understanding mathematics used in DSP like linear equations, How to visualize signals in terms of x(n,k) and what exactly is impulse response.

  • 1
    $\begingroup$ Please provide more details. $n,k$ could refer to many things in many cases. What material did you face when you encountered these? Is that from a certain book? internet tutorial? Each of these may define $k,n$, and $x$ differently. $\endgroup$ – havakok Jan 14 at 11:54
  • $\begingroup$ Encountered this when studying convolution and correlation concepts $\endgroup$ – anshkun Jan 14 at 22:05