Journal ArticleDOI
The discrete memoryless multiple access channel with partially cooperating encoders (Corresp.)
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It turns out that the optimal conference is very simple: by proving a converse and giving an achievability proof, the capacity region of the multiple access channel with partially cooperating encoders is established.Abstract:
We introduce the communication situation in which the encoders of a multiple access channel are partially cooperating. These encoders are connected by communication links with finite capacities, which permit both encoders to communicate with each other. First we give a general definition of such a communication process (conference). Then, by proving a converse and giving an achievability proof, we establish the capacity region of the multiple access channel with partially cooperating encoders. It turns out that the optimal conference is very simple.read more
Citations
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Journal ArticleDOI
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
TL;DR: Using distributed antennas, this work develops and analyzes low-complexity cooperative diversity protocols that combat fading induced by multipath propagation in wireless networks and develops performance characterizations in terms of outage events and associated outage probabilities, which measure robustness of the transmissions to fading.
Journal ArticleDOI
User cooperation diversity. Part I. System description
TL;DR: Results show that, even though the interuser channel is noisy, cooperation leads not only to an increase in capacity for both users but also to a more robust system, where users' achievable rates are less susceptible to channel variations.
Journal ArticleDOI
Coded cooperation in wireless communications: space-time transmission and iterative decoding
TL;DR: This paper presents two extensions to the coded cooperation framework, which increase the diversity of coded cooperation in the fast-fading scenario via ideas borrowed from space-time codes and investigates the application of turbo codes to this framework.
Dissertation
Cooperative diversity in wireless networks: algorithms and architectures
TL;DR: This dissertation develops energy-efficient algorithms that employ certain kinds of cooperation among terminals, and illustrates how one might incorporate these algorithms into various network architectures, including current cellular and ad-hoc networks.
Journal ArticleDOI
On Capacity Under Receive and Spatial Spectrum-Sharing Constraints
TL;DR: This paper investigates the behavior of capacity when constraints are placed on the channel output signal (as well as generalizations thereof), finding that in certain network scenarios, including multiple-access and relay situations, both the structure of the problem and the conclusions change.
References
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Journal ArticleDOI
Source coding with side information and a converse for degraded broadcast channels
Rudolf Ahlswede,János Körner +1 more
TL;DR: In Section H of the paper, a characterization of the capacity region for degraded broadcast channels (DBC's) is given, which was conjectured by Bergmans and is somewhat sharper than the one obtained by Gallager.
Journal ArticleDOI
A coding theorem for multiple access channels with correlated sources
David Slepian,Jack Keil Wolfd +1 more
TL;DR: This paper shows that e, which depends only on the channel, is convex and gives formulas to determine it exactly and is the natural generalization of channel capacity to this situation.
Journal ArticleDOI
The Capacity Region of a Channel with Two Senders and Two Receivers
TL;DR: In this paper, a characterization of the capacity region of a two-way channel is given for the communication situation, in which both senders send independent messages simultaneously to both receivers and all senders and receivers are at different terminals.