Wireless Communications Quiz

If the transmitter power (Pt) is 20 dBm, the transmitter antenna gain (Gt) is 10 dBi, the free-space path loss (FSPL) is 100 dB, and the receiver antenna gain (Gr) is 10 dBi, what is the received power (Pr)?

What happens if an object obstructs more than 40% of the first Fresnel zone?

What is a Fresnel zone?

• A circular area around the transmitter antenna

• An elliptical region of space between the transmitter and receiver

• The area immediately around the receiver antenna

• A type of antenna used for long-distance communication

In a link budget calculation, what does the term "receiver sensitivity" mean?

• The maximum distance the receiver can be from the transmitter

• The minimum signal strength required for the receiver to successfully demodulate the signal

• The amount of power the receiver consumes

• The bandwidth the receiver can handle

Which factor is used to provide a buffer for unexpected losses in a wireless link?

• Antenna gain

• Fade margin

• Transmitter power

• Receiver sensitivity

In a wireless link budget, if the total losses are greater than the gains, what can be inferred about the communication link?

• The link will work perfectly

• The link will experience significant signal degradation or may not work at all

• The transmitter power needs to be reduced

• The receiver sensitivity is too high

Which scenario is likely to provide the best line-of-sight communication?

• A clear path where 60% of the first Fresnel zone is obstructed

• A path with multiple obstructions within the first Fresnel zone

• A clear path with no obstructions within the first Fresnel zone

• A path where 40% of the first Fresnel zone is obstructed

Which of the following components is NOT typically included in a link budget calculation?

• Transmitter power

• Cable losses

• Internet speed

• Receiver sensitivity

How many Fresnel zones are typically considered in line-of-sight communication?

• 1

• 2

• 3

• 4

What is the primary purpose of including antenna gain in a link budget calculation?

• To reduce the overall power consumption

• To improve the signal-to-noise ratio

• To increase the effective radiated power in a specific direction

• To determine the bandwidth requirements