Question

Orthogonal vectors are

(a) Perpendicular to each other

(b) Their dot product must be zero

(c) One signal cannot interfere with the other

(d) All of the mentioned

I have been asked this question by my college professor while I was bunking the class.

I'm obligated to ask this question of Waveform Coding in chapter Channel Coding of Digital Communications

Answer 1

The correct option is (d) All of the mentioned

Best explanation: Orthogonal signals are perpendicular to each other, the inner or dot product between those two signals must equal zero, one vector has zero projection over the other because they do not share same signal space.