Q.1
Which among the following is an advantage of using Fast Fourier Transform (FFT) for spectrum sensing?
  • a) Analysis of computation complexity in the FFT window
  • b) Analysis of phase in the FFT window
  • c) Analysis of period enclosed in the FFT window
  • d) Analysis of frequencies enclosed in the FFT window
Q.2
Which among the following is not a limitation of employing FFT?
  • a) Wideband ADC is required
  • b) Restriction on bandwidth
  • c) Increased energy demand
  • d) High delay
Q.3
Which among the following parameters do not exhibit better performance in the spectrum analyzer when compared to the FFT technique?
  • a) Complexity
  • b) Bandwidth
  • c) Short signal detection
  • d) Power
Q.4
Which among the following is accomplished by sampling sub-Nyquist in wideband FFT spectrum sensing?
  • a) Reduction of complexity
  • b) Improved signal detection
  • c) Reduced power consumption
  • d) Shorter time delay
Q.5
Which among the following layers have a similar impact due to interference caused by primary user transmission?
  • a) Physical layer and MAC layer
  • b) MAC layer and network layer
  • c) Network layer and Transport layer
  • d) Transport layer and Physical layer
Q.6
Which among the following is the impact of primary user interference in the physical layer?
  • a) High bit error rate
  • b) High delay
  • c) High collision
  • d) High energy demand
Q.7
Which among the layers fail to route a packet due to primary user interference?
  • a) Physical layer
  • b) Data link layer
  • c) Network layer
  • d) Transport layer
Q.8
Which among the following is the impact of having poor spur free dynamic range?
  • a) Difficulty in short signal detection
  • b) Overloading
  • c) Additive noise
  • d) High complexity
Q.9
Which among the following results in low sensitivity?
  • a) Poor collision mitigation mechanism
  • b) Poor signal processing
  • c) Poor noise figure
  • d) Poor linear noise amplifier performance
Q.10
Under good propagation conditions, increasing the transmission energy is a poor technique to increase spectrum efficiency.
  • a) True
  • b) False
Q.11
Which among the following statements holds true about the give graph?
  • a) The energy required per bit increases exponentially with exponential increase in bits per Hertz
  • b) The energy required per bit increases linearly with exponential increase in bits per Hertz
  • c) The energy required per bit increases linearly with linear increase in bits per Hertz
  • d) The energy required per bit increases exponentially with linear increase in bits per Hertz
Q.12
Which among the following may be implemented to reduce the amount of assumption about interference?
  • a) Installing multiple sensors to observe the same transmission
  • b) Developing multiple channel models
  • c) Developing multiple signal propagation models
  • d) Installing multiple resource managers
0 h : 0 m : 1 s