Top 150+ Solved Mobile Communication MCQ Questions Answer
Q. The received power of a wideband signal fluctuates significantly when a receiver is moved about a local area. State whether True or False.
a. True
b. false
c. Both A and B
d. Cant Say
Q. Why is the phase of individual multipath components are not received in RF Pulse system?
a. Due to use of duplexer
b. Due to use of ADC
c. Due to use of flip flops
d. Due to use of envelope detector
Q. Anyone who uses atelephone or data modem on the telephone circuit is a part of globle communication network called as__________________ and the pair of wires connecting a subscriber to the closest telephone office is called as ____________________.
a. Personal Mobile Telephone Network,Twisted Pair
b. World Wide Web, Subscriber Line
c. Internet, Drop Line
d. Public Telephone Network, Local Loop
Q. Free space propagation model is to predict ______,Which of the following do not undergo free space propagation?
a. Received signal strength,Wired telephone systems
b. Transmitted power, Satellite communication system
c. Gain of transmitter,Microwave line of sight radio links
d. Gain of receiver, Wireless line of sight radio links
Q. The free space model predicts that received signal decays as a function of _____
a. Gain of transmitter antenna
b. T-R separation
c. Power of transmitter antenna
d. Effective aperture of the antenna
Q. Which hand-off stage deals with the relinquishment of unnecessary frequency channels by keeping the availability for other mobile users?
a. Initialization
b. Resource Reservation
c. Call Execution
d. Call Completion
Q. Free space propagation model is to predict ______ and Propagation model that characterize rapid fluctuation is called ________
a. Transmitted power,Hata model
b. Received signal strength, Fading model
c. Gain of transmitter, Large scale propagation model
d. Gain of receiver,Okumura model
Q. Differentiate GSM and DECT.
a. Both B and C
b. GSM -Range is up to 70km. DECT-Range is limited to about 300m.
c. GSM- Global systems for mobile communications DECT- Digital enhanced cordless elecommunications
d. None of the above
Q. ______ leads to time dispersion and frequency selective fading. What is characteristic of flat fading?
a. Doppler spread, Mobile radio channel has constant gain
b. Multipath delay spread, Non linear phase response
c. Time dispersive parameters, Linear phase response
d. Frequency delay spread,Bandwidth is greater than the bandwidth of transmitted signal
Q. What is the order of typical values of rms delay spread in outdoor mobile radio channels?
a. Microseconds
b. Nanoseconds
c. Seconds
d. Minutes
Q. Power delay profile and magnitude frequency response of a mobile radio channel are related through _______
a. Laplace Transform
b. Fourier Transform
c. S Transform
d. Wavelet Transform
Q. _____ and coherence bandwidth are inversely proportional to one another.Coherence bandwidth is a statistical measure of range of frequencies over which channel is considered _______
a. Rms delay spread, Flat
b. Mean excess delay,Frequency selective
c. Excess delay spread,Time variant
d. Doppler spread, Time dispersive
Q. Verify True or False A.Frequency domain channel sounding technique do not require hard wired synchronization between transmitter and receiver. B.There is no relationship between time domain and frequency domain techniques.
a. Both Statements True
b. Both Statements False
c. Only A true
d. Only B true
Q. Which of the following is not an advantage of spread spectrum channel sounding system?
a. Real time
b. Rejection of passband noise
c. Coverage range improvement
d. Less transmitter power required
Q. Verify True or False A. Impulse response is a narrowband characterization. B.Impulse response does not play any role in characterization of the channel.
a. Both Statements True
b. Both Statements False
c. Only A true
d. Only B true