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Agrell, E. (2015) *Conditions for a Monotonic Channel Capacity*.

** BibTeX **

@article{

Agrell2015,

author={Agrell, Erik},

title={Conditions for a Monotonic Channel Capacity},

journal={Ieee Transactions on Communications},

issn={0090-6778},

volume={63},

issue={3},

pages={738-748},

abstract={Motivated by results in optical communications, where the performance can degrade dramatically if the transmit power is sufficiently increased, the channel capacity is characterized for various kinds of memoryless vector channels. It is proved that for all static point-to-point channels, the channel capacity under an equal-power constraint is a nondecreasing function of power. As a consequence, maximizing the mutual information over all input distributions with a certain power is for such channels equivalent to maximizing it over the larger set of input distributions with upperbounded power. The channel coding theorem is formally proved for an equal-power constraint. For interference channels such as optical wavelength-division multiplexing systems, the primary channel capacity is always nondecreasing with power if all interferers transmit with identical distributions as the primary user. Also, if all input distributions in an interference channel are optimized jointly, then the achievable sum-rate capacity is again nondecreasing. The results generalize to the channel capacity as a function of a wide class of costs, not only power.},

year={2015},

keywords={Achievable rate, capacity-cost function, channel capacity, mutual information, nonlinear distortion, optical communications; Shannon limit},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 215521

A1 Agrell, Erik

T1 Conditions for a Monotonic Channel Capacity

YR 2015

JF Ieee Transactions on Communications

SN 0090-6778

VO 63

IS 3

SP 738

OP 748

AB Motivated by results in optical communications, where the performance can degrade dramatically if the transmit power is sufficiently increased, the channel capacity is characterized for various kinds of memoryless vector channels. It is proved that for all static point-to-point channels, the channel capacity under an equal-power constraint is a nondecreasing function of power. As a consequence, maximizing the mutual information over all input distributions with a certain power is for such channels equivalent to maximizing it over the larger set of input distributions with upperbounded power. The channel coding theorem is formally proved for an equal-power constraint. For interference channels such as optical wavelength-division multiplexing systems, the primary channel capacity is always nondecreasing with power if all interferers transmit with identical distributions as the primary user. Also, if all input distributions in an interference channel are optimized jointly, then the achievable sum-rate capacity is again nondecreasing. The results generalize to the channel capacity as a function of a wide class of costs, not only power.

LA eng

DO 10.1109/tcomm.2014.2381247

LK http://dx.doi.org/10.1109/tcomm.2014.2381247

LK http://publications.lib.chalmers.se/records/fulltext/215521/local_215521.pdf

OL 30