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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Proceedings ArticleDOI
Some research issues in cognitive radio networks
Gaurav Bansal,M. Jahangir Hossain,P. Kaligineedi,Hugues Mercier,C. Nicola,Umesh Phuyal,Mohammad Mamunur Rashid,K.C. Wavegedara,Ziaul Hasan,Majid Khabbazian,Vijay K. Bhargava +10 more
TL;DR: An overview of some research issues for CR networks is presented with focus on i) information- theoretic aspects, ii) spectrum sensing, iii) link adaptation, iv) advanced transceiver design, and v) admission control.
Journal ArticleDOI
Power allocation and admission control in multiuser relay networks via convex programming: centralized and distributed schemes
TL;DR: In this article, the authors considered the power allocation problem for multiuser wireless networks under the assumption of amplify-and-forward cooperative diversity and proposed centralized and distributed power allocation strategies with and without minimum rate requirements.
Proceedings ArticleDOI
Distributed antenna system: Performance analysis in multi-user scenario
TL;DR: It is demonstrated that thanks to the decrease of the maximum minimum access distance, a tremendous transmission power gain can be achieved by DASs and has great potentials to outperform the CAS in terms of multi-user capacity when channel-aware scheduling is adopted.
Proceedings ArticleDOI
Multi-User MISO Broadcast Channel with User-Cooperating Decoder
Hyukjoon Kwon,John M. Cioffi +1 more
TL;DR: The cooperation channel gain and the mobile power used in a cooperation channel is analyzed to maintain a constant rate gap against the zero-forcing beamforming scheme with full CSI at the base station.
Proceedings ArticleDOI
Downlink scheduling using compressed sensing
TL;DR: A distributed self-selection procedure is combined with the technique of compressed sensing to identify a set of users who are getting simultaneous access to the downlink broadcast channel.
References
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Book
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.
Book
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.