![]() If the signal bandwidth is larger than the coherence bandwidth, the signal will experience frequency-selective fading. So if your signal's bandwidth is small compared to the channel's coherence bandwidth, it will not be distorted very much. The importance of the coherence bandwidth is the following: in a frequency range which is considerably smaller than the coherence bandwidth, the channel's frequency response can be considered flat (i.e., it doesn't change much). Its inverse, i.e., the smallest period of the complex exponentials in the frequency domain is referred to as the coherence bandwidth. The coherence bandwidth is proportional to the inverse of the RMS delay spread, or roughly to the reciprocal of the maximum excess delay 4, p. This largest delay difference is called the channel's delay spread. $$h(t)=\sum_-\tau_0)$, which is simply the inverse of the largest delay difference. You can withdraw your consent at any time in the footer of every email. Impulse response changes much slower than the transmitted signal. ![]() ![]() Slow Fading results due to following: Low Doppler Spread. If you have a multipath channel with impulse response coherence Announces Collaboration With Multi-Million Dollar RPG From Ex-Journey. It is result of signal path change due to shadowing and obstructions such as tree or buildings etc. ![]()
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