TY - GEN
T1 - The capacity of the frequency/time-selective fading channel
AU - Tulino, Antonia
AU - Caire, Giuseppe
AU - Shamai, Shlomo
AU - Verdú, Sergio
PY - 2010
Y1 - 2010
N2 - We find the capacity of discrete-time channels subject to both frequency-selective and time-selective fading, where the channel output is observed in additive Gaussian noise. A coherent model is assumed where the fading coefficients are known at the receiver. Capacity depends on the first-order distributions of the fading processes in frequency and in time, which are assumed to be independent of each other, and a simple formula is given when one of the processes is iid and the other one is sufficiently mixing. When the frequency-selective fading coefficients are known also to the transmitter, we show that the optimum normalized power spectral density is the waterfilling power allocation for a reduced signal-to-noise ratio, where the gap to the actual signal-to-noise ratio depends on the fading distributions.
AB - We find the capacity of discrete-time channels subject to both frequency-selective and time-selective fading, where the channel output is observed in additive Gaussian noise. A coherent model is assumed where the fading coefficients are known at the receiver. Capacity depends on the first-order distributions of the fading processes in frequency and in time, which are assumed to be independent of each other, and a simple formula is given when one of the processes is iid and the other one is sufficiently mixing. When the frequency-selective fading coefficients are known also to the transmitter, we show that the optimum normalized power spectral density is the waterfilling power allocation for a reduced signal-to-noise ratio, where the gap to the actual signal-to-noise ratio depends on the fading distributions.
KW - Additive Gaussian noise
KW - Channel capacity
KW - Coherent communications
KW - Frequency-flat fading
KW - Frequency-selective fading
KW - OFDM
KW - Random matrices
KW - Waterfilling
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U2 - 10.1109/ITWKSPS.2010.5503142
DO - 10.1109/ITWKSPS.2010.5503142
M3 - Conference contribution
AN - SCOPUS:77954824017
SN - 9781424463725
T3 - IEEE Information Theory Workshop 2010, ITW 2010
BT - IEEE Information Theory Workshop 2010, ITW 2010
T2 - IEEE Information Theory Workshop 2010, ITW 2010
Y2 - 6 January 2010 through 8 January 2010
ER -