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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Book ChapterDOI
Linear and Dirty‐Paper Techniques for the Multiuser MIMO Downlink
TL;DR: This chapter reviews techniques based on linear techniques and non-linear precoding for multi-user MIMO downlink communications and discusses some important open problems.
Proceedings ArticleDOI
Multiple antenna multiple user channels: optimisation in low SNR
Holger Boche,Eduard A. Jorswieck +1 more
TL;DR: It can be shown that for SNR values below some threshold only one user is active, and the low SNR behaviour is analysed and necessary and sufficient conditions for this threshold value are given.
Proceedings ArticleDOI
Transmission of correlated sources over a fading multiple access channel
R Rajesh,Vinod Sharma +1 more
TL;DR: This paper provides sufficient conditions for transmission with given distortions to a Gaussian MAC (GMAC), and transmission schemes for discrete and Gaussian sources over a fading GMAC are considered.
Journal ArticleDOI
Greedy User Selection Using a Lattice Reduction Updating Method for Multiuser MIMO Systems
TL;DR: A low-complexity greedy user selection scheme with an iterative lattice reduction (LR) updating algorithm when an LR-based MIMO detector is used that can provide a comparable performance with the combinatorial approaches with much lower complexity.
Proceedings ArticleDOI
A Case for Joint Network Coding and Power Control in Wireless Linear Networks
TL;DR: A joint network coding and adaptive power control scheme which regulates the transmission power to reduce the overall energy usage and to increase the bandwidth efficiency is proposed.
References
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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
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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.