Efficient power control over fading channels

Adrian Kotelba, Aarne Mämmelä

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    3 Citations (Scopus)


    This paper introduces a novel concept of efficient power control in nonergodic fading channels. We use the risk-reward approach to quantitatively describe the performance of power control schemes. A power control scheme is said to be efficient if it minimizes the risk for a given level of reward. The reward and risk are measured, respectively, as the expected value of the link spectral efficiency in excess of some predefined target value and the below-target semideviation of the link spectral efficiency distribution. Furthermore, we introduce a novel fundamental limit on the performance of adaptive power control schemes. The new fundamental limit, which we call the efficient frontier, is the set of all efficient power control schemes. We analytically derive the adaptive power control rule that achieves the fundamental limit. We show that no power control scheme can be constructed with the performance above the efficient frontier. The numerical results suggest that various state-of-the-art power control schemes are suboptimal, i.e., their risk-reward performance is below the efficient frontier.
    Original languageEnglish
    Title of host publication2008 IEEE Global Telecommunications Conference
    Subtitle of host publicationIEEE GLOBECOM 2008
    PublisherIEEE Institute of Electrical and Electronic Engineers
    Number of pages6
    ISBN (Print)978-1-4244-2324-8
    Publication statusPublished - 2008
    MoE publication typeA4 Article in a conference publication
    EventIEEE Global Telecommunications Conference, IEEE GLOBECOM 2008 - New Orleans, United States
    Duration: 30 Nov 20083 Dec 2008


    ConferenceIEEE Global Telecommunications Conference, IEEE GLOBECOM 2008
    Abbreviated titleIEEE GLOBECOM 2008
    Country/TerritoryUnited States
    CityNew Orleans


    • power control
    • fading
    • programmable control
    • adaptive control
    • finance
    • calculus
    • vectors
    • channel capacity
    • random variables
    • probability distribution


    Dive into the research topics of 'Efficient power control over fading channels'. Together they form a unique fingerprint.

    Cite this