RFCoherence Bandwidth and Coherence Time Explained
coherence bandwidth
coherence time
channel
delay spread
wireless communication
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This page describes the difference between Coherence Bandwidth and Coherence Time.
Coherence Bandwidth
The bandwidth (range of frequencies) over which a channel remains constant is called the Coherence Bandwidth.
Coherence Bandwidth ≈ (1 / Maximum Delay Spread)
A more accurate way to calculate coherence bandwidth is by using the RMS Delay Spread. This is because different channels will experience varying signal intensities over different delay spans, even with the same delay spread.
Coherence Time
The time over which a channel remains constant is called the Coherence Time.
