FormulaDen.com

Physics Chemistry Math Chemical Engineering Civil Electrical Electronics Electronics and Instrumentation Materials Science Mechanical Production Engineering Financial Health

Coherence Time Formula

Fx Copy

LaTeX Copy

Coherence time refers to the duration over which the channel conditions remain relatively unchanged. Check FAQs

T c = \frac{0.423}{F m}

T_c - Coherence Time?F_m - Maximum Doppler Shift?

Coherence Time Example

With values

With units

Only example

Here is how the Coherence Time equation looks like with Values.

Here is how the Coherence Time equation looks like with Units.

Here is how the Coherence Time equation looks like.

0.0077 = \frac{0.423}{0.0551}

0.0077s = \frac{0.423}{0.0551kHz}

0.0077 = \frac{0.423}{0.0551}

Tip: Use pencil ( Pencil

) icon above to edit Input Values and Units.

Calculate

Recalculate

Solution

Copy

Reset

You are here -

Home » Category

Engineering » Category

Electronics » Category

Wireless Communication » fx Coherence Time

Coherence Time Solution

Follow our step by step solution on how to calculate Coherence Time?

FIRST Step Consider the formula

T c = \frac{0.423}{F m}

Next Step Substitute values of Variables

∴

T c = \frac{0.423}{0.0551kHz}

Next Step Convert Units

∴

T c = \frac{0.423}{55.1Hz}

Next Step Prepare to Evaluate

∴

T c = \frac{0.423}{55.1}

Next Step Evaluate

∴

T c = 0.00767695099818512s

LAST Step Rounding Answer

∴

T c = 0.0077s

Coherence Time Formula Elements

Variables

Coherence Time

Coherence time refers to the duration over which the channel conditions remain relatively unchanged.

Symbol: T_c

Measurement: TimeUnit: s

Note: Value can be positive or negative.

Formulas to find Coherence Time

Maximum Doppler Shift

Maximum Doppler Shift or Max Doppler spread or, max Doppler frequency is refers to the maximum change in frequency a wireless signal due to the relative motion between the transmitter and receiver.

Symbol: F_m

Measurement: FrequencyUnit: kHz

Note: Value should be greater than 0.

Formulas to find Maximum Doppler Shift

Other formulas in Frequency Reuse Concept category

Go Forward Frame

F.F = 𝝉 + R.F + 44 \cdot T s

Go Reverse Frame

R.F = F.F - (𝝉 + 44 \cdot T s)

Go Time Slots

𝝉 = F.F - (R.F + 44 \cdot T s)

Go Channel Reuse Ratio

Q = \sqrt{3 \cdot K}

How to Evaluate Coherence Time?

Coherence Time evaluator uses Coherence Time = 0.423/Maximum Doppler Shift to evaluate the Coherence Time, The Coherence Time is the time duration over which the channel impulse response is essentially invariant. Such channel variation is much more significant in wireless communications systems, due to Doppler effects. Coherence Time is denoted by T_c symbol.

How to evaluate Coherence Time using this online evaluator? To use this online evaluator for Coherence Time, enter Maximum Doppler Shift (F_m) and hit the calculate button.

FAQs on Coherence Time

What is the formula to find Coherence Time?

The formula of Coherence Time is expressed as Coherence Time = 0.423/Maximum Doppler Shift. Here is an example- 0.007677 = 0.423/55.1.

How to calculate Coherence Time?

With Maximum Doppler Shift (F_m) we can find Coherence Time using the formula - Coherence Time = 0.423/Maximum Doppler Shift.

Can the Coherence Time be negative?

Yes, the Coherence Time, measured in Time can be negative.

Which unit is used to measure Coherence Time?

Coherence Time is usually measured using the Second[s] for Time. Millisecond[s], Microsecond[s], Nanosecond[s] are the few other units in which Coherence Time can be measured.

Let Others Know

✖

Facebook

Twitter

Copied!

: Value
: Unit