Coherence

Deciding for the correct way to calculate coherence time

Deciding for the correct way to calculate coherence time
  1. What is the formula for coherence time?
  2. What is a coherence time?
  3. What way coherence time is related with maximum Doppler shift?

What is the formula for coherence time?

Two useful quantities that are related to temporal coherence are the coherence time τc and coherence length lc = cτc. The coherence time is related to the spectral bandwidth of the light source Δf as τc ≈ 1/Δf.

What is a coherence time?

Coherence time is the time duration over which the channel impulse response is considered to be not varying. Such channel variation is much more significant in wireless communications systems, due to Doppler effects.

What way coherence time is related with maximum Doppler shift?

The Doppler spread and coherence time are inversely proportional to one another. That is, Coherence time is actually a statistical measure of the time duration over which the channel impulse response is essentially invariant, and quantifies the similarity of the channel response at different times.

Piano Synthesizing piano
Synthesizing piano
Can you synthesize a piano?What is synthesis piano?How does a synthesized piano create sound?Is piano Same as synthesizer? Can you synthesize a pian...
Doppler Doppler radar phase shift sign convention
Doppler radar phase shift sign convention
What is Doppler phase shift?Can Doppler shift be negative?How is Doppler shift measured?What is Doppler FFT? What is Doppler phase shift?With the "D...
Window Applying Kaiser Window to sinc interpolation
Applying Kaiser Window to sinc interpolation
In what way is Kaiser window superior to other window functions?How does sinc interpolation work?What is Kaiser window used for?What is the main lobe...