OVERVIEW AND BASIS OF WIRELESS CHANNELS AND COMMUNICATION

Which of the following multiple access techniques are used by first-generation cellular systems?

• FDMA/FDD and TDMA/FDD

• TDMA/FDD and CDMA/FDD

• FDMA/FDD and CDMA/FDD

• FDMA/FDD only

Which of the following multiple access techniques are used by second generation cellular systems?

• FDMA/FDD and TDMA/FDD

• TDMA/FDD and CDMA/FDD

• FDMA/FDD and CDMA/FDD

• FDMA/FDD only

Which one is not a TDMA standard of second generation networks?

• GSM

• IS-136

• AMPS

• PDC

How many users or voice channels are supported for each 200 KHz channel in GSM?

• Eight

• Three

• Sixty four

• Twelve

What is the name of the web browsing format language supported by 2.5G technology?

• Wireless Application Protocol

• Hypertext Markup Language

• Extensible Markup Language

• Hypertext Transfer Protocol

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

• HSCSD

• GPRS

• EDGE

• GSM

What changes GPRS need to acquire while upgrading itself from GSM?

• A whole new base station

• New transceiver at base station

• New channel cards

• New packet overlay including routers and gateways

Which new modulation technique is used by EDGE?

• BPSK

• 8- PSK

• DQPSK

• AFSK

EDGE is sometimes also referred as ____________

• HSCSD

• 3GPP

• EGPRS

• EGSCSD

The mechanism behind electromagnetic wave propagation cannot be attributed to ___________

• Reflection

• Diffraction

• Scattering

• Sectoring