Simple Model
In a simple model, a signal transmitted at time will be received as
where is the channel impulse response (CIR) at time . A signal transmitted at time will be received as
Now, if is relatively small, the channel may be considered constant within the interval to .
Coherence time will therefore be given by
Read more about this topic: Coherence Time (communications Systems)
Famous quotes containing the words simple and/or model:
“The Americans never use the word peasant, because they have no idea of the class which that term denotes; the ignorance of more remote ages, the simplicity of rural life, and the rusticity of the villager have not been preserved among them; and they are alike unacquainted with the virtues, the vices, the coarse habits, and the simple graces of an early stage of civilization.”
—Alexis de Tocqueville (18051859)
“The best way to teach a child restraint and generosity is to be a model of those qualities yourself. If your child sees that you want a particular item but refrain from buying it, either because it isnt practical or because you cant afford it, he will begin to understand restraint. Likewise, if you donate books or clothing to charity, take him with you to distribute the items to teach him about generosity.”
—Lawrence Balter (20th century)