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WorksheetsOVERVIEW AND BASIS OF WIRELESS CHANNELS AND COMMUNICATION
Total questions: 35
Worksheet time: 18mins
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
Propagation model that characterize rapid fluctuation is called _________
Hata model
Fading model
Large scale propagation model
Okumura model
Free space propagation model is to predict ______
Received signal strength
Transmitted power
Gain of transmitter
Gain of receiver
Relation between wavelength and carrier frequency is _________
λ=c/f
λ=c*f
λ=f/c
λ=1/f
Which of the following antenna radiates power with unit gain uniformly in all directions?
Directional antenna
Dipole antenna
Isotropic antenna
Loop antenna
EIRP is abbreviated as __________
Effective isotropic radiated power
Effective isotropic radio power
Effective and immediate radiated power
Effective and immediate ratio of power
Which of the following is not a characteristic of 3G network?
Communication over VoIP
Unparalleled network capacity
Multi-megabit Internet access
LTE based network
Which of the following is not an application of third generation network?
Global Positioning System (GPS)
Video conferencing
Mobile TV
Downloading rate upto 1 Gbps
What is the dimension of object as compared to wavelength of propagating wave when reflection occurs?
Large
Small
Same
Very small
During a physics experiment, Dia is studying the behavior of light as it passes from air into a perfect dielectric material. She observes the phenomenon of reflection. What is the case of reflection, in course of second medium being a perfect dielectric?
Loss of energy during absorption
Total energy reflected back to first medium
No loss of energy in absorption
Total energy transmitted into second medium
The angle at which no reflection occurs in the medium of origin is called _________
Azimuth angle
Elevation angle
Brewster angle
Inclination angle
Polarized wave can be mathematically represented as sum of ________
Four orthogonal components
Two spatially adjacent components
Two spatially orthogonal components
Six orthogonal components
What is the nominal range of Bluetooth?
100 m
10 m
1 m
10 Km
Bluetooth operates in which band?
Ka Band
L Band
Ku Band
2.4 GHz ISM Band
What is the range of time slot in Bluetooth?
120 milliseconds
625 microseconds
577 microseconds
5.7 seconds
Which of the following standard committee specifies Bluetooth and other Personal Area Networks (PAN)?
IEEE 802.11b
IEEE 802.15
IEEE 802.11g
IEEE 802.16
What type of handovers is supported by LTE?
Hard handover only
Soft handover only
Hard and soft handover
Hard, soft and softest handover
What is the minimum amount of RF spectrum needed for an FDD LTE radio channel?
1.4 MHz
2.8 MHz
5 MHz
20 MHz
What is the average uploading speed of 4G LTE network?
1-3 Gbps
2-5 Gbps
1-3 Mbps
2-5 Mbps
Which of the following distribution is used for describing statistical time varying nature of received envelope of multipath component?
Log normal distribution
Levy distribution
Rayleigh distribution
Gaussian distribution
Ricean distribution degenerates to ________ distribution when the dominant component fades away.
Log normal
Gamma
Rayleigh
Gaussian
Doppler shift is directly proportional to __________
Velocity
Height of antenna
Power of receiving antenna
Power of transmitter
What is a measure of the maximum frequency difference for which signals are strongly correlated in amplitude?
Coherence bandwidth
Narrow bandwidth
Incoherent bandwidth
Wide bandwidth
Diffraction allows radio signals to propagate around ________
Continuous surface
Smooth surface
Curved surface of Earth
Does not allow propagation
Which principle explains the phenomenon of diffraction?
Principle of Simultaneity
Pascal's Principle
Archimedes' Principle
Huygen's principle
A link budget is accounting of all __________
Gain and losses from the transmitter
Power transmitted by transmitter
Power received by receiver
Power transmitted and received
