NDLI: Capacities of time-varying multiple-access channels with side information

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Capacities of time-varying multiple-access channels with side information

Content Provider	IEEE Xplore Digital Library
Author	Das, A. Narayan, P.
Copyright Year	2001
Description	Author affiliation: Lucent Technol. Bell Labs, Holmdel, NJ, USA (Das, A.)
Abstract	Summary form only given. We address the capacity problem for a class of time-varying multiple-access channels (TVMAC), when the underlying channel state evolves in time according to a probability law which is known to the transmitters and the receiver. Additionally, the transmitters and the receiver have access to varying degrees of channel state information (CSI) concerning the condition of the channel. Discrete-time channels with finite input, output and state alphabets are considered first. The special case of a memoryless TVMAC, with the channel state process being a time-invariant, indecomposable, aperiodic Markov chain, shows a surprising anomaly in that imperfect transmitter CSI can cause the capacity under some distributions for the initial state to be strictly larger than that under a stationary distribution for the initial state. We also consider a time-varying multiple-access fading channel with additive Gaussian noise, when various amounts of CSI are provided to the transmitters and perfect CSI is available to the receiver, and the fades are assumed to be stationary and ergodic. Implications for transmitter power control are discussed.
Sponsorship	IEEE Inf. Theory Soc
File Size	52027
File Format	PDF
ISBN	0780371194
DOI	10.1109/ITW.2001.955152
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-09-02
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transmitters USA Councils Educational institutions Capacity planning Fading Additive noise Gaussian noise Power control
Content Type	Text
Resource Type	Article

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