Title :
Stochastic Power Allocation with Outage-Expectation Constraints in Lognormal Fading Wireless Channels
Author_Institution :
Stanford Univ., Stanford
Abstract :
This paper concerns stochastic power allocation in lognormal fading wireless channels. We consider an outage-based quality of service (QoS) specification which requires that, for each channel, the outage expectation (i.e., the average probability/time that a transmitter/receiver pair experiences any outage due to fading) is kept below a given level. The problem of finding an optimal power allocation to achieve this QoS goal over lognormal fading wireless channels (with statistically independent fadings) can be posed as a specific type of stochastic posynomial programming with lognormally distributed random coefficients. We show that this expectation-based stochastic posynomial program (with lognormal variations) can be reformulated as a conventional (i.e., deterministic) posynomial program, which can be furthered solved by the very efficient interior-point method.
Keywords :
fading channels; log normal distribution; quality of service; stochastic processes; interior-point method; lognormal fading wireless channels; lognormally distributed random coefficients; outage-based quality of service; outage-expectation constraints; stochastic posynomial programming; stochastic power allocation; Fading; Information systems; Laboratories; Probability; Quality of service; Random variables; Shadow mapping; Stochastic processes; Stochastic systems; Transmitters;
Conference_Titel :
Electrical and Computer Engineering, 2007. CCECE 2007. Canadian Conference on
Conference_Location :
Vancouver, BC
Print_ISBN :
1-4244-1020-7
Electronic_ISBN :
0840-7789
DOI :
10.1109/CCECE.2007.385