Question

When symbol time is much smaller than the delay spread, the resulting wireless channel is known as

Answer 1

Answer:

MULTI PATH PROPAGATION

Explanation:

When the symbol time gets smaller than the time delay there is no communication takes place as this phenomenon or this effect is known as a Doppler's effect.

If we really want to give a name to this communication we call it multipath propagation as the signal is not fixed and doesn't know the path to lead. Here the relative movements shift the frequency of a signal and made it unclear at the receiver end. It is easy to explain or understand through sound waves as it shows where the signal is leading with respect to time

Answer 2

When symbol time is much smaller than the delay spread, the resulting wireless channel is known as flat fading channel.

Explanation:

• When the signal travel across the channel is larger than the given bandwidth of the system, the signal overpowers the bandwidth and it will not able to be travel in the channel in a special condition and calling it as the flat fading channel.

• Fading is a technical term related to the wireless communication. In simple words, fading can be defined as the reduction in the strength of the signal.

• It is a random process and depends upon the radio frequency which is responsible for the wireless communication between electronic devices.

• It may occur due to the change in weather or due to an obstacle in the path of the radio wave propagation.

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