QUIZ WC-PATHLOSS MODEL1

Which of the following models assumes a uniform radiation pattern for the antennas and a loss that increases with the square of the distance?

• Free Space model
• Two-Ray model
• Rayleigh model
• Nakagami model

Which of the following models assumes that a direct wave and a ground reflected wave are the only significant propagation paths?

• Free Space model
• Two-Ray model
• Rayleigh model
• Nakagami model

Which of the following models assumes that the transmitted signal propagates through free space without any attenuation?

• Free Space model
• Two-Ray model
• Rayleigh model
• Nakagami model

Which of the following is true about the Free Space model?

• It considers the ground reflections
• It assumes a non-uniform radiation pattern for the antennas
• It assumes that the signal undergoes no attenuation
• It considers diffraction and scattering

Which of the following is true about the Two-Ray model?

• It is only applicable for outdoor environments
• It assumes a uniform radiation pattern for the antennas
• It assumes that the signal undergoes no attenuation
• It considers diffraction and scattering

Which of the following is true about path loss models?

• They describe the attenuation of a signal as it propagates through a medium
• They assume that the antenna gains are constant over time
• They assume that the signal undergoes no attenuation
• They describe the modulation scheme used by the signal

A transmitter with a power output of 10 mW transmits a signal through free space over a distance of 100 meters. What is the received power assuming a perfect receiver? (Use Free Space model)

• 10 pW
• 1 nW
• 1 pW
• 10 nW

A transmitter with a power output of 20 mW transmits a signal through an outdoor environment over a distance of 200 meters. What is the received power assuming a perfect receiver? (Use Two-Ray model)

• 10 μW
• 20 μW
• 5 μW
• 40 μW

A transmitter with a power output of 1 W transmits a signal through an urban environment over a distance of 1 km. What is the received power assuming a perfect receiver? (Use Free Space model)

• 1 μW
• 10 μW
• 100 μW
• 1 mW

Which of the following is true about the path loss models discussed?

• The Two-Ray model is always more accurate than the Free Space model
• The Free Space model assumes that the antenna gains are constant over time
• The Two-Ray model assumes that the transmitted signal undergoes no attenuation
• The Free Space model is more accurate for outdoor environments with clear line of sight