EMS 9

Question 1

List applications of RF communication systems.

Answer 1

A communication system in which information is transmitted through the air as electromagnetic waves in the radio frequency range.
* Common applications are : Mobile phones, Radio, TV broadcasting.

Question 2

Explain wireless data transmission.

Answer 2

Wireless data transmission can be divided into public network data transmission and private network data transmission.
– Public : 2G , 3G , 4G , 5G
– Private : Wi-Fi, Bluetooth, Apple AirDrop

Question 3

Explain mobile communication.

Answer 3

A wireless communication system that consists of cells, cell sites, base stations, mobile telephone switching offices, and mobile units and provide communication services over a geographic area called a coverage zone.

Question 4

Explain the application of Wi-Fi.

Answer 4

Wi-Fi is a family of wireless network protocols based on IEEE 802.11 family of standards.

Question 5

Explain the application of Bluetooth.

Answer 5

Short range wireless technology used for exchanging data between fixed and mobile devices.
Bluetooth uses 2.4 GHz (2400 MHz – 2483.5 MHz)
Can connect up to 8 devices
Bluetooth utilises Frequency Hopping Spread Spectrum
(FHSS). Alternates between 79 channels.