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Wireless Mobile Communications
Wireless Mobile Communications Interview
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Q.1
Which of the following multiple access techniques are used by second generation cellular systems?
a) FDMA/FDD and TDMA/FDD
b) TDMA/FDD and CDMA/FDD
c) FDMA/FDD and CDMA/FDD
d) FDMA/FDD only
Q.2
Which one is not a TDMA standard of second generation networks?
a) GSM
b) IS-136
c) AMPS
d) PDC
Q.3
Which of the following is a CDMA standard of second generation network?
a) IS-95
b) IS-136
c) ETACS
d) EDGE
Q.4
PopularCDMA standard IS-is also known as ______________
a) CdmaOne
b) CdmaTwo
c) IS-136
d) IS-95B
Q.5
How many users or voice channels are supported for eachKHz channel in GSM?
a) Eight
b) Three
c) Sixty four
d) Twelve
Q.6
How many voice channels are supported for eachKHz radio channel in IS-136?
a) Eight
b) Thirty
c) Three
d) Sixteen
Q.7
How many users are supported in IS-for each 1.MHz?
a) Eight
b) Sixty four
c) Sixteen
d) Twenty five
Q.8
Which modulation technique is used by GSM?
a) GMSK
b) BPSK
c) QPSK
d) GFSK
Q.9
IS-uses which modulation technique?
a) GMSK
b) BPSK
c) QAM
d) AFSK
Q.10
IS-uses which modulation technique?
a) π/4 DQPSK
b) BPSK
c) GMSK
d) AFSK
Q.11
Which is one of the disadvantages ofstandards?
a) Short Messaging Service (SMS)
b) Digital modulation
c) Limited capacity
d) Limited Internet Browsing
Q.12
GSM (Global System for Mobile) was earlier also known as _____________
a) Group System Mobile
b) Global Special Meaning
c) Group Special Mobile
d) Global Special Mobile
Q.13
CDMA standard, IS-was proposed by which company?
a) Nippon Telephone and Telegraph (NTT)
b) Qualcomm
c) Bellcore and Motorola
d) AT&T Bell Laboratories
Q.14
Which one of the followingstandard is used in Japan?
a) IS-136
b) GSM
c) PDC
d) AMPS
Q.15
TheGSM technology uses a carrier separation of _____________
a) 1.25 MHz
b) 200 KHz
c) 30 KHz
d) 300 KHz
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