Hello Folks,
I have a generator that generates channel impulse response (CIR) between
two points (tx and rx) in a 3D closed space, like a room.

From CIR, I get power delay profile (PDP)by squaring its absolute value.

Here are some questions that I am having difficulty to understand:

Let fs be sampling frequency.

(1) I found in a textbook: PDP = (abs(CIR).^2)./dt; where dt is 1/fs.
Why multiply with dt?

(2) To compare two PDPs, it seems that I need to normalize both of the
PDPs. Correct? Now, since PDP comes out of a CIR, do I normalize CIR as
well as PDP or only one of them (which one?) will do?

Thank you for reading and taking time to reply :)