A channel is characterized by the scattering function

Signals are assumed to be uncorrelated when the spaced-time

spaced frequency correlation function drops to of its maximum value.

a. Determine delay and Doppler spreads, and also coherence

time and coherence bandwidth of the channel.

b. Determine the minimum value of the frequency separation

_f between two sinusoidal tones propagating through the channel so that

they fade independently of each other. Does this channel undergo flat- or

frequency-selective fading if the signal has a transmission bandwidth of 200

kHz, 2 MHz? What is

A channel is characterized by the scattering function

Signals are assumed to be uncorrelated when the spaced-time

spaced frequency correlation function drops to of its maximum value.

a. Determine delay and Doppler spreads, and also coherence

time and coherence bandwidth of the channel.

b. Determine the minimum value of the frequency separation

_f between two sinusoidal tones propagating through the channel so that

they fade independently of each other. Does this channel undergo flat- or

frequency-selective fading if the signal has a transmission bandwidth of 200

kHz, 2 MHz? What is the maximum signal bandwidth for which a flat-fading

assumption is valid?

c. Determine the minimum value of the time difference

between two sinusoidal tones cos 2_ft and cos 2_f t + _t propagating

through the channel so that they fade independently of each other. If the

channel impulse response is sampled every T seconds, for what value of T will

the samples be independent?

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