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It is known that lattice coding can achieve the capacity of the additive white Gaussian noise (AWGN) channel. This paper addresses the performance of lattice codes in the ergodic fading channel. Using nested lattice codes and ambiguity decoding, we show that the rates achieved by lattice coding and decoding are within a constant gap of the capacity of the ergodic channel at moderate and high signal-to-noise-ratio...
We consider a generalization of Costa's “writing on dirty paper” channel. In this generalization, the interference is multiplied by a fading coefficient, which changes in an i.i.d. manner between time instances, according to a general distribution. The value of this fading coefficient is unknown at the transmitter, representing a realistic scenario of imperfect channel state information at the transmitter...
This paper studies a symmetric K user Gaussian interference channel with K transmitters and K receivers. A "very strong" interference regime is derived for this channel setup. A "very strong" interference regime is one where the capacity region of the interference channel is the same as the capacity region of the channel with no interference. In this regime, the interference can...
A simple lemma is derived that allows to transform a general single-user (non-Gaussian, non-additive) continuous-alphabet channel as well as a general multiple-access channel into a modulo-additive noise channel. While in general the transformation is information lossy, it allows to leverage linear coding techniques and capacity results derived for networks comprised of additive Gaussian nodes to...
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