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WorksheetsCommunication Systems, 18P4PH11, Unit - V
Total questions: 25
Worksheet time: 50mins
The process of transferring a mobile station from one base station to another is............
A) MSC
B) Roamer
C) Forward channel
D) Hand off
The 2G cellular network uses..........
A) TDMA/FDD
B) CDMA/FDD
C) Digital modulation formats
D) All of the above
3G W - CDMA is also known as...........
A) DECT
B) ETACS
C) UMTS
D) DCS-1800
Radio capacity may be increased in cellular concept by........
A) Increase in radio spectrum
B) Both A and C
C) Increasing the number of base stations & reusing the channels
D) None of the above
Spectrum Efficiency of a cellular network is ..........
A) The traffic carried by whole network
B) The traffic carried per cell divided by the bandwidth of the system and the area of a cell
C) Expressed in Erlang /MHz /km2
D) Both B and C
Power density is basically termed as ............ power per unit area.
A) Refracted
B) Radiated
C) Reflected
D) Diffracted
What is the possible range of height for the occurrence of sporadic E-region with respect to normal E-region?
A) 90 Km - 130 Km
B) 90 Km - 120 Km
C) 80 Km - 120 Km
D) 80 Km - 130 Km
Which waveform plays a crucial role in determining the radiation pattern of the dipole/wire antennas?
A) Voltage
B) Current
C) Frequency
D) Phase
Slow frequency hopping refers to ........
A) More than one frequency hop during each symbol
B) Hopping rate greater than or equal to information symbol rate
C) One or more symbols transmitted in time interval between frequency hops
D) All of the above
DECT stands for .........
A) Digital European Cellular Telex
B) Digital European Cellular Telephone
C) Digital European Cordless Telephone
D) Digitized Emergency Cellular Telephone
The Traffic intensity is expressed in ........
A) λ / sec
B) dB / sec
C) Erlangs / MHz / km2
D) Erlangs
In Frequency Division Multiple Access (FDMA), each band is reserved for a specific is ........
A) Signal
B) Station
C) Bandwidth
D) Data
FDMA, TDMA and CDMA are ........
A) Channelization Protocols
B) Automatic Repeat Protocol
C) Bit Oriented Protocol
D) None of these
The Total of frequency up to an upper class limit or boundary is known as .......
A) Cummulative Frequency
B) Average frequency
C) Distribution Frequency
D) Polygon Frequency
Number of times each value appears is called .........
A) Standard Deviation
B) Range
C) Mode
D) Frequency
The Cable television is an example of ..........
A) FDMA
B) TDMA
C) CDMA
D) SDMA
Advanced Mobile Phone Service (AMPS) has a frequency reuse factor of ......
A) 9
B) 8
C) 7
D) 6
In 1900 MHz band, a mobile station needs more .......
A) Power
B) Frequency
C) Signals
D) Frames
Which mode is used for installing networks in wireless communication device characteristics?
A) Fixed and Wired
B) Mobile and Wired
C) Mobile and Wireless
D) Fixed and Wired
The Wireless communication is started in .......
A) 1885
B) 1895
C) 1995
D) 1999
.......... is the maximum number of channels that can be provided in a fixed frequency band.
A) Spectral Capacity
B) Channel Capacity
C) Radio Capacity
D) Carrier Capacity
In a CDMA system, link performance for each user ........... as the number of users .........
A) Decrease, Increase
B) Decrease, Decrease
C) Increase, Decrease
D) Increase, Increase
What is Mobile Identification Number (MIN) ?
A) Subscriber’s Telephone Number
B) Paging Message
C) Traffic Request Number
D) Mobile Internet
GSM is an example of .........
A) FDMA Cellular Systems
B) SDMA Cellular Systems
C) CDMA Cellular Systems
D) TDMA Cellular Systems
A Packet radio refers to .....
A) Single user on multiple channels as per demand
B) Multiple users on multiple channels at different time slots
C) Multiple users on single channel
D) Multiple users with coding techniques
