Q.1
Which of the following problem occur due to adjacent channel interference?
  • a) Cross talk
  • b) Missed calls
  • c) Blocked calls
  • d) Near-far effect
Q.2
Which of the following technology distributes the coverage of the cell and extends the cell boundary to hard-to-reach places?
  • a) Sectoring
  • b) Cell splitting
  • c) Micro cell zone concept
  • d) Scattering
Q.3
Which of the following do not undergo free space propagation?
  • a) Wired telephone systems
  • b) Wireless line of sight radio links
  • c) Microwave line of sight radio links
  • d) Satellite communication system
Q.4
What is the dimension of object as compared to wavelength of propagating wave when reflection occurs?
  • a) Small
  • b) Same
  • c) Very small
  • d) Large
Q.5
Which of the following explains the concept of diffraction loss?
  • a) Archimedes’ Principle
  • b) Fresnel zone
  • c) Principle of Simultaneity
  • d) Pascal’s Principle
Q.6
Which of the following is not a practical path loss estimation technique?
  • a) Determination of percentage of coverage area
  • b) Hata model
  • c) Log distance path loss model
  • d) Log normal shadowing
Q.7
Which of the most widely used model for signal prediction in urban areas?
  • a) Okumura model
  • b) Attenuation factor model
  • c) Ericsson Multiple Breakpoint Model
  • d) Log distance path loss model
Q.8
Which of the following is not an effect caused by multipath in radio channel?
  • a) Random frequency modulation
  • b) Time dispersion
  • c) Rapid changes in signal strength
  • d) Power of base station
Q.9
What is the main disadvantage of RF pulse system?
  • a) Simplicity
  • b) Interference and noise
  • c) Not real time
  • d) Complexity
Q.10
Which of the following is not a multipath channel parameter that can be determined from power delay profile?
  • a) RMS delay spread
  • b) Doppler spread
  • c) Mean excess delay
  • d) Excess delay spread
Q.11
Which of the following is not a channel parameter?
  • a) Coherence time
  • b) Rms delay spread
  • c) Doppler spread
  • d) Bandwidth
Q.12
Which of the following is an important statistics of a Rayleigh fading useful for designing error control codes and diversity schemes?
  • a) Doppler frequency
  • b) Level crossing rate (LCR)
  • c) Power density
  • d) Mobile speed
Q.13
Which of the following is not a principle shape factor?
  • a) Azimuthal direction of maximum fading
  • b) Angle of arrival
  • c) Angular spread
  • d) Angular constriction
Q.14
Which of the following is not a technique for FM demodulation?
  • a) Phase locked discriminator
  • b) Slope detection
  • c) Zero crossing detection
  • d) Product detector
Q.15
Which of the following is the ratio of the throughput data rate per Hertz?
  • a) Spectral density
  • b) Bandwidth efficiency
  • c) Power density
  • d) Power efficiency
Q.16
Which of the following is not a linear modulation technique?
  • a) π/4 QPSK
  • b) OQPSK
  • c) BPSK
  • d) FSK
Q.17
Which of the following is not a property of MSK?
  • a) Self synchronizing capability
  • b) Variable envelope
  • c) Spectral efficiency
  • d) Good BER performance
Q.18
What is the set of possible carrier frequencies in FH-SS?
  • a) Hop
  • b) Hopset
  • c) Symbols
  • d) Chips
Q.19
Which of the following is specified by a specific number of bit errors occurring in a given transmission?
  • a) Equally likely event
  • b) Exhaustive events
  • c) Bit error rate
  • d) Outage event
Q.20
Which of the following is not used to improve received signal quality over small scale times and distance?
  • a) Diversity
  • b) Channel coding
  • c) Equalization
  • d) Modulation
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