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What are the differences between the flat fading and the frequency selective fading?
➨In flat fading, range of frequencies in a frequency spectrum are equally faded unlike in frequency selective fading where in one part of frequency spectrum is faded more than the other part of frequency spectrum.
What is flat fading frequency?
1. A type of small scale fading where all frequency signal components experience the same magnitude of fading; corresponds to the case where the signal bandwidth is smaller than the channel coherence bandwidth.
What frequency is selective fading?
Frequency selective fading occurs when the symbol length is shorter than the delay spread, or equivalently when signal bandwidth is larger than the channel bandwidth.
What is the difference between flat fading and frequency selective fading?
Following points summarize difference between flat fading and frequency selective fading. ➨In flat fading, BW of signal is less than the BW of channel where as in frequency selective fading, BW of signal is greater than BW of channel.
What are the characteristics of flat fading channels?
• The figure-1 depicts time domain and frequency domain flat fading channel characteristics. • As gain of the signal varies over time, flat fading channels are known as amplitude varying channels. They are also called as narroband channels as signal BW is narrow compare to channel BW.
What does fading mean in a wireless system?
Wireless system consists of transmitter, receiver and channel. The channel between transmitter and receiver can be time varying or fixed. Fading refers to variation in received signal strength with respect to time due to channel seen by the transmitted signal over the path of travel.
What’s the difference between a faded signal and a channel?
They are also called as narroband channels as signal BW is narrow compare to channel BW. • In this faded signal, channel response of signal has constant gain/linear phase over bandwidth (BW) which is less than that of signal BW.