Mathematical Description
In a narrowband flat-fading channel with multiple transmit and receive antennas (MIMO), the system is modeled as
where and are the receive and transmit vectors, respectively, and and are the channel matrix and the noise vector, respectively. The noise is often modeled as circular symmetric complex normal with
where the mean value is zero and the noise covariance matrix is known.
Read more about this topic: Channel State Information
Famous quotes containing the words mathematical and/or description:
“As we speak of poetical beauty, so ought we to speak of mathematical beauty and medical beauty. But we do not do so; and that reason is that we know well what is the object of mathematics, and that it consists in proofs, and what is the object of medicine, and that it consists in healing. But we do not know in what grace consists, which is the object of poetry.”
—Blaise Pascal (1623–1662)
“It is possible—indeed possible even according to the old conception of logic—to give in advance a description of all ‘true’ logical propositions. Hence there can never be surprises in logic.”
—Ludwig Wittgenstein (1889–1951)