This paper addresses fundamental limitations of feedback using information theoretic
conservation laws and flux arguments. The paper has two parts. In the first part, we derive a …

We characterize the capacity region to within 2 bits/s/Hz and the symmetric capacity to within
1 bit/s/Hz for the two-user Gaussian interference channel (IC) with feedback. We develop …

The feedback capacity of additive stationary Gaussian noise channels is characterized as
the solution to a variational problem in the noise power spectral density. When specialized …

We establish that the feedback capacity of the trapdoor channel is the logarithm of the
golden ratio and provide a simple communication scheme that achieves capacity. As part of …

Schalkwijk and Kailath (1966) developed a class of block codes for Gaussian channels with
ideal feedback for which the probability of decoding error decreases as a second-order …

Next generation cyber-physical systems challenge the standard assumption of classical
control theory that communication can be performed instantaneously, reliably, and with …

A coding theorem is proved for a class of stationary channels with feedback in which the
output Y n= f (X nm n, Z nm n) is the function of the current and past m symbols from the …

For a stationary additive Gaussian-noise channel with a rational noise power spectrum of a
finite-order L, we derive two new results for the feedback capacity under an average channel …

The use of open-loop coding can be easily extended to a closed-loop concatenated code if
the transmitter has access to feedback. This can be done by introducing a feedback …

The Ising channel, which was introduced in 1990, is a channel with memory that models
intersymbol interference. In this paper, we consider the Ising channel with feedback and find …