Proceedings ArticleDOI
Information capacity and power control in single-cell multiuser communications
Raymond Knopp,Pierre A. Humblet +1 more
- Vol. 1, pp 331-335
TLDR
By examining the bit error-rate with antipodal signalling, it is shown that an increase in capacity over a perfectly-power controlled (Gaussian) channel can be achieved, especially if the number of users is large, and the inherent diversity in multiuser communications over fading channels is shown.Abstract:
We consider a power control scheme for maximizing the information capacity of the uplink in single-cell multiuser communications with frequency-flat fading, under the assumption that the users attenuations are measured perfectly. Its main characteristics are that only one user transmits over the entire bandwidth at any particular time instant and that the users are allocated more power when their channels are good, and less when they are bad. Moreover, these features are independent of the statistics of the fading. Numerical results are presented for the case of single-path Rayleigh fading. We show that an increase in capacity over a perfectly-power controlled (Gaussian) channel can be achieved, especially if the number of users is large. By examining the bit error-rate with antipodal signalling, we show the inherent diversity in multiuser communications over fading channels.read more
Citations
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Journal ArticleDOI
Delay-optimal opportunistic scheduling and approximations: the log rule
TL;DR: In order to meet performance and robustness objectives, a new class of policies are proposed, called the Log rule, that are radial sum-rate monotone (RSM) and provably throughput-optimal and it can be shown that an RSM policy minimizes the asymptotic probability of sum-queue overflow.
Proceedings ArticleDOI
Energy Efficient Opportunistic Network Coding for Wireless Networks
Tao Cui,Lijun Chen,Tracey Ho +2 more
TL;DR: This work gives an oblivious backpressure algorithm which does not optimize overhearing of transmissions, and a practical protocol called COPR based on the oblivious back pressure algorithm which largely reduces network power consumption over existing algorithms.
Journal ArticleDOI
Acquiring Partial CSI for Spatially Selective Transmission by Instantaneous Channel Norm Feedback
TL;DR: It is shown that the Euclidean norm of the instantaneous channel, when combined with long-term channel statistics provides sufficient information for the transmitter to efficiently utilize multiuser diversity in time, frequency, and space.
Proceedings ArticleDOI
An SDN-Based Network Architecture for Extremely Dense Wireless Networks
Hassan Ali-Ahmad,Claudio Cicconetti,Antonio de la Oliva,Vincenzo Mancuso,Malla Reddy Sama,Pierrick Seite,Sivasothy Shanmugalingam +6 more
TL;DR: A novel network architecture accounting for MAC control and Mobility Management has been proposed, being the subject of this paper.
Proceedings ArticleDOI
The effect of feedback quantization on the throughput of a multiuser diversity scheme
TL;DR: It is concluded that using only a few quantization levels can yield a throughput that is only slightly less than the throughput obtained by using unquantized feedback.
References
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Elements of information theory
Thomas M. Cover,Joy A. Thomas +1 more
TL;DR: The author examines the role of entropy, inequality, and randomness in the design of codes and the construction of codes in the rapidly changing environment.
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Information Theory and Reliable Communication
TL;DR: This chapter discusses Coding for Discrete Sources, Techniques for Coding and Decoding, and Source Coding with a Fidelity Criterion.
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Information theoretic considerations for cellular mobile radio
TL;DR: Some information-theoretic considerations used to determine upper bounds on the information rates that can be reliably transmitted over a two-ray propagation path mobile radio channel model, operating in a time division multiplex access (TDMA) regime, under given decoding delay constraints are presented.
Journal ArticleDOI
Shannon-theoretic approach to a Gaussian cellular multiple-access channel
TL;DR: Shannon-theoretic limits for a very simple cellular multiple-access system, and a scheme which does not require joint decoding of all the users, and is, in many cases, close to optimal.
Journal ArticleDOI
Estimate of channel capacity in Rayleigh fading environment
TL;DR: In this article, the authors derived the channel capacity in a Rayleigh fading environment and showed that channel capacity is always lower than that in a Gaussian-noise environment and that diversity schemes can improve channel capacity.