Question

____ spread spectrum is ____ when ___ is programmed.

(a) Frequency hopped, adaptive, hop

(b) Frequency hopped, not adaptive, hop

(c) Direct sequence, not adaptive, sequence

(d) Direct sequence, adaptive, hop

This question was addressed to me in a job interview.

The query is from Adaptive Radio in division Cognitive Radio Basics of Cognitive Radio

Answer 1

The correct answer is:

(a) Frequency hopped, adaptive, hop

In the context of Adaptive Radio in Cognitive Radio Basics, frequency-hopping spread spectrum is adaptive when the frequency hops are dynamically programmed based on changing conditions or feedback from the environment. The term "adaptive" refers to the system's ability to adjust the hopping pattern to optimize performance based on real-time network or environmental conditions. Thus, frequency hopping can be adaptive if the hopping is managed or modified during operation.