Question

1) a) What is the maximum Doppler for a vehicle speed of 140 km/hr at 900 MHz?

b) What is the minimum (most negative) Doppler for this case?

c) For this range of Doppler, what is the corresponding speed at 1800 MHz?

2) What is the probability that a Rayleigh faded signal is at least 15 dB lower than its mean power?

3) a) If a vehicle is moving at 140 km/hr and using a 900 MHz carrier, how long is the time difference (Δt) for the signal to have zero correlation?

b) What is the corresponding distance traveled if the vehicle is moving in the direction that minimizes (most negative value) the Doppler?

Answer 1

Solution to all the sub questions are given above. formulas are used the values are substituted. All are in SI units. K]km/hr is converted into m/s for quick understanding.

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