Question

Average received signal power decreases __________ with distance.

(a) Exponentially

(b) Logarithmically

(c) Two times

(d) Four times

This question was addressed to me in a job interview.

Enquiry is from Practical Link Budget Design Using Path Loss Models in section Mobile Radio Propagation: Large – Scale Path Loss of Wireless/Mobile

Answer 1

Correct answer is (b) Logarithmically

The best I can explain: Both theoretical and measurement based propagation models indicate that average received signal power decreases logarithmically with distance. It is valid for both outdoor and indoor channels.