• Admin
    UC Research Repository
    View Item 
       
    • UC Home
    • Library
    • UC Research Repository
    • College of Engineering
    • Engineering: Journal Articles
    • View Item
       
    • UC Home
    • Library
    • UC Research Repository
    • College of Engineering
    • Engineering: Journal Articles
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of the RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    Statistics

    View Usage Statistics

    Relationship of Average Transmitted and Received Energies in Adaptive Transmission

    Thumbnail
    View/Open
    12623812_Taylor.pdf (790.0Kb)
    Author
    Mammela, A.
    Kotelba, A.
    Hoyhtya, M.
    Taylor, D.P.
    Date
    2010
    Permanent Link
    http://hdl.handle.net/10092/5317

    This paper studies the analytical relationship between the average transmitted and received energies under several adaptive transmitter power control methods, including water filling, truncated power inversion, and downlink beamforming. The study is applicable to many fading channel scenarios, including frequency-nonselective, frequency-selective, and multiple-input-multiple-output (MIMO) channels. Both the average transmitted and received energies are commonly used in performance comparisons, and the selection depends on what one wants to investigate. The transmitted energy is known to be the basic system resource. In the case of adaptive transmission, the average transmitted energy should, in general, be used instead of the average received energy. The use of transmitted energy leads to the normalization problem of the channel. The ratio of received energy to transmitted energy is the energy gain of the channel. All physical systems follow an energy-conservation law, which implies that the energy gain of the channel is less than or equal to 1. The major approaches for normalization include the setting of either the average energy gain or the peak energy gain to unity. In the normalization, the average energy gain is defined for a signal whose energy is uniformly distributed across the frequency and spatial dimensions. The peak energy gain of many mathematical fading models is not bounded, and those models cannot be normalized by the peak energy gain. We show that the proper normalization of the mathematical model and the selection of the correct performance measure are of critical importance in comparative performance analysis of adaptive transmission systems.

    Subjects
    Energy-conservation law
     
    multiantenna systems
     
    multipath fading
     
    multiple-input–multiple-output (MIMO) systems
     
    transmitter power control
     
    Field of Research::09 - Engineering::0906 - Electrical and Electronic Engineering
     
    Field of Research::10 - Technology::1005 - Communications Technologies
     
    Field of Research::08 - Information and Computing Sciences::0802 - Computation Theory and Mathematics
    Collections
    • Engineering: Journal Articles [1125]
    Rights
    https://hdl.handle.net/10092/17651

    UC Research Repository
    University Library
    University of Canterbury
    Private Bag 4800
    Christchurch 8140

    Phone
    364 2987 ext 8718

    Email
    ucresearchrepository@canterbury.ac.nz

    Follow us
    FacebookTwitterYoutube

    © University of Canterbury Library
    Send Feedback | Contact Us