QUIZ WC -iNTRODUCTION WIRELESS CHANNEL

Under which category of wireless channel impairments does the large scale path loss fall?

• Multipath fading
• Doppler spread
• Co-channel interference
• Line-of-sight blockage

Which of the following factors affect large scale path loss?

• Transmitting power and receiver sensitivity
• Carrier frequency and bandwidth
• Antenna type and height
• Modulation scheme and coding rate

In which direction does the received signal power decrease with distance for the free space path loss model?

• Proportional to the distance
• Inversely proportional to the distance
• Remains constant with distance
• Increases with distance

What is the formula for calculating the path loss for the free space path loss model in decibels (dB)?

• L(dB) = 20 log10(f) + 20 log10(d) - 147.6
• L(dB) = 32.4 + 20 log10(f) + 20 log10(d)
• L(dB) = 10 log10(f) + 10 log10(d) + 92.4
• L(dB) = 20 log10(f) - 20 log10(d) - 147.6

Which type of antenna is suitable for mitigating the effects of large scale path loss in a wireless communication system?

• Omni-directional antenna
• Yagi antenna
• Parabolic dish antenna
• Helical antenna

In the log-distance path loss model, what is the value of the path loss exponent n for free space propagation?

• ZERO
• 1
• 2.7
• 4

Which of the following is a common technique used to mitigate the effects of large scale path loss in a wireless communication system?

• Multiple-input multiple-output (MIMO)
• Orthogonal frequency-division multiplexing (OFDM)
• Time-division multiplexing (TDM)
• Code-division multiple access (CDMA)

What is the difference between large scale path loss and small scale fading in wireless communication systems?

• Large scale path loss is caused by distance while small scale fading is caused by multi-path propagation
• Large scale path loss is caused by multi-path propagation while small scale fading is caused by distance
• Large scale path loss affects the entire wireless communication system while small scale fading affects only certain parts of the system
• Large scale path loss is caused by interference while small scale fading is caused by noise