1) Find center frequencies of following channel numbers:

$\quad$ a. Channel number 601

$\quad$ b. Channel number 1023

$\quad$ c. Channel number 799

$\quad$ d. Channel number 990

2) Categorize all types of networks according to the area that each covers.

3) Discuss major changes that took place in communication systems from 1G-5G.

4) Why is conventional cellular system also called as a 832 channel system ?

5) Find two wireless technologies that use TDD.

6) A particular technology has 30 KHz as one channel’s bandwidth. It is an FDD system. A user requests for a voice call. How much bandwidth is being utilized during the call ?

7) Name two systems which use unlicensed band for communication.

8) How does licensed and unlicensed band communication differ ?

Case Studies

1) Find out the systems at present in which partly wired links and partly wireless communications are existing ?

2) Find out all the existing communication systems used in everyday life. Out of these , list wired and wireless systems. Find their associated standards, modulation schemes, Bit rate, Frequency band used for communication, Special features etc.