Question

Which of the following is not present in the source segment of a mobile unit?

(a) Narrowband ADCs

(b) Source encoder

(c) Source decoder

(d) Interface to the PSTN

This question was addressed to me in an online interview.

I'm obligated to ask this question of Software Component Characteristics topic in section Smart Antenna & Software Component Characteristics of Cognitive Radio

Answer 1

Right option is (d) Interface to the PSTN

Explanation: Source segment of mobile unit differs from basestation. The mobile unit source segment comprises of source encoder, source decoder, narrowband ADCs, and narrowband DACs. The bases tation consists of interface to the public switched telephone network for access to remote source coding.