Question

Diffracted propagation undergoes attenuation at the rate of the third power of distance.

(a) True

(b) False

I got this question during an interview for a job.

My question is from Next Generation Wireless Network in chapter Next Generation Wireless Network of Cognitive Radio

Answer 1

The correct choice is (a) True

To explain: Cognitive radio shifts communication from direct propagation to diffracted propagation. Diffracted propagation undergoes attenuation at the rate of the fourth power of distance. It hinders the ability of the radio to sense, calculate interference, and evaluate the outcome of communication.