WIRELESS COMMUNICATION

What is Mobile communication?

• a) Allows to communicate from different locations without the use of physical medium

• 
  b) Allows to communicate from different locations with the use of physical medium

• 
  c) Allows to communicate from same locations without the use of physical medium
  

• 
  d) Allows to communicate from same locations with the use of physical medium

Which of the following is a type of wireless communication?

• LAN

• WAN

• PAN

• All of the above

_______ is a transmission method used in MIMO wireless communications to transmit

• MU-MIMO

• STTD

• SM

• Collaborative Uplink MIMO

Space diversity s also known as ________

• Frequency diversity

• Antenna diversity

• Polarization diversity

• Time diversity

MIMO is a smart antenna technology.

• True

• False

Which of the following is a CDMA standard of second generation network?

• ETACS

• EDGE

• IS-95

• IS-136

Which two channels are responsible for initiating mobile calls?

• a) FCC and RVC

• 
  b) FVC and FCC

• 
  c) FVC and RVC

• 
  d) FCC and RCC

Which of the following is not a TDMA standard of 2.5G network?

• a) GPRS

• 
  b) GSM

• 
  c) HSCSD

• 
  d) EDGE

Which of the following leads to the 3G evolution of GSM, IS-136 and PDC systems?

• GPRS

• HSCSD

• W-CDMA

• EDGE

Which modulation scheme is used by bluetooth ?

• GFSK

• DQPSK

• BPSK

• MSK

Answer explanation

Bluetooth uses GFSK (Gaussian Frequency Shift Keying). When GFSK is used for Bluetooth modulation, the frequency of the carrier is shifted to carry the modulation. By doing this the Bluetooth modulation achieves a bandwidth of 1 MHz with stringent filter requirements to prevent interference on other channels.