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Optimal power control in interference-limited fading wireless channels with outage-probability specifications.
| Content Provider | CiteSeerX |
|---|---|
| Author | Sunil, K. Boyd, Stephen |
| Abstract | Abstract—We propose a new method of power control for interference-limited wireless networks with Rayleigh fading of both the desired and interference signals. Our method explictly takes into account the statistical variation of both the received signal and interference power and optimally allocates power subject to constraints on the probability of fading induced outage for each transmitter/receiver pair. We establish several results for this type of problem. We establish tight bounds that relate the outage probability caused by channel fading to the signal-to-interference margin calculated when the statistical variation of the signal and intereference powers is ignored. This allows us to show that well-known methods for allocating power, based on Perron–Frobenius eigenvalue theory, can be used to determine power allocations that are provably close to achieving optimal (i.e., minimal) outage probability. We show that the problems of minimizing transmitter power subject to constraints on outage probability and minimizing outage probability subject to power constraints can be posed as a geometric program (GP). A GP is a special type of optimization problem that can be transformed to a nonlinear convex optimization problem by a change of variables and therefore solved globally and efficiently by recently developed interior-point methods. We also give a fast iterative method for finding the optimal power allocation to minimize outage probability. Index Terms—Fading channels, personal communication networks, power control, radio communication. I. |
| File Format | |
| Access Restriction | Open |
| Subject Keyword | Outage Probability Outage-probability Specification Interference-limited Fading Wireless Channel Optimal Power Control Power Control Statistical Variation Power Constraint Induced Outage Geometric Program Power Allocation Interference Power Signal-to-interference Margin Fast Iterative Method Interference-limited Wireless Network New Method Perron Frobenius Eigenvalue Theory Power Subject Interference Signal Index Term Rayleigh Fading Radio Communication Nonlinear Convex Optimization Problem Tight Bound Optimal Power Allocation Optimization Problem Several Result Interior-point Method Outage Probability Subject Personal Communication Network Channel Fading Special Type Transmitter Power Subject Well-known Method Intereference Power |
| Content Type | Text |
