Journal ArticleDOI
A framework for uplink power control in cellular radio systems
Reads0
Chats0
TLDR
It is shown that systems in which transmitter powers are subject to maximum power limitations share these common properties, which permit a general proof of the synchronous and totally asynchronous convergence of the iteration p(t+1)=I(p(t)) to a unique fixed point at which total transmitted power is minimized.Abstract:
In cellular wireless communication systems, transmitted power is regulated to provide each user an acceptable connection by limiting the interference caused by other users. Several models have been considered including: (1) fixed base station assignment where the assignment of users to base stations is fixed, (2) minimum power assignment where a user is iteratively assigned to the base station at which its signal to interference ratio is highest, and (3) diversity reception where a user's signal is combined from several or perhaps all base stations. For the above models, the uplink power control problem can be reduced to finding a vector p of users' transmitter powers satisfying p/spl ges/I(p) where the jth constraint p/sub j//spl ges/I/sub j/(p) describes the interference that user j must overcome to achieve an acceptable connection. This work unifies results found for these systems by identifying common properties of the interference constraints. It is also shown that systems in which transmitter powers are subject to maximum power limitations share these common properties. These properties permit a general proof of the synchronous and totally asynchronous convergence of the iteration p(t+1)=I(p(t)) to a unique fixed point at which total transmitted power is minimized. >read more
Citations
More filters
Journal ArticleDOI
Artificial Noise Assisted Secure Transmission for Distributed Antenna Systems
TL;DR: Simulation results validate the effectiveness of the proposed iterative algorithm and show that the scheme not only reduces the system overhead greatly but also maintains a good secrecy performance.
Journal ArticleDOI
Uplink user capacity in a CDMA macrocell with a hotspot microcell: exact and approximate analyses
TL;DR: This paper studies the number of voice users supported on the uplink of a single-macrocell/single-microcell code-division multiple-access system and points to differences in capacity performance based on the tier-selection method, as well as on the traffic density within the hotspot region.
Proceedings ArticleDOI
A distributed joint scheduling and power control algorithm for multicasting in wireless ad hoc networks
TL;DR: A joint scheduling and power control algorithm is introduced, which eliminates the strong interferers thus allowing the other transmitters to solve the power control problem.
Journal ArticleDOI
Optimality of Treating Interference as Noise: A Combinatorial Perspective
Xinping Yi,Giuseppe Caire +1 more
TL;DR: In this paper, the problem of determining the generalized degrees of freedom (GDoF) region achievable by treating interference as Gaussian noise (TIN) derived by Geng et al. from a combinatorial optimization perspective was reformulated for single-antenna Gaussian interference channels, and a low-complexity GDoF-based distributed link scheduling and power control mechanism was proposed.
Joint Scheduling and Wireless Network Coding
TL;DR: A new framework for network coding in ad hoc wireless networks is established and a method of constructing time-varying linear network codes that satisfy the wireless network properties is presented.
References
More filters
Journal ArticleDOI
On the capacity of a cellular CDMA system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
TL;DR: In this paper, the interference-suppression feature of CDMA (code division multiple access) can result in a many-fold increase in capacity over analog and even over competing digital techniques.
Proceedings Article
On the capacity of a cellular CDMA system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Andrew J. Viterbi,L.A. Weaver,Charles E. Iii Del Mar Wheatley +5 more
TL;DR: It is concluded that properly augmented and power-controlled multiple-cell CDMA (code division multiple access) promises a quantum increase in current cellular capacity.
Journal ArticleDOI
A simple distributed autonomous power control algorithm and its convergence
Gerard J. Foschini,Z. Miljanic +1 more
TL;DR: For wireless cellular communication systems, one seeks a simple effective means of power control of signals associated with randomly dispersed users that are reusing a single channel in different cells, and the authors demonstrate exponentially fast convergence to these settings whenever power settings exist for which all users meet the rho requirement.
Parallel and distributed computation
TL;DR: This book focuses on numerical algorithms suited for parallelization for solving systems of equations and optimization problems, with emphasis on relaxation methods of the Jacobi and Gauss-Seidel type.
Journal ArticleDOI
Performance of optimum transmitter power control in cellular radio systems
TL;DR: In order to derive upper performance bounds for transmitter power control schemes, algorithms that are optimum in the sense that the interference probability is minimized are suggested.
Related Papers (5)
A simple distributed autonomous power control algorithm and its convergence
Gerard J. Foschini,Z. Miljanic +1 more