Interference management in frequency, time, and space domains for cognitive radios

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

    4 Citations (Scopus)


    In order to minimize interference with primary users (PU), cognitive radios should operate multidimensionally over time, frequency, and space. This paper addresses the problem with power control and predictive frequency selection. Both the methods are coupled with spectrum sensing. The proposed frequency selection method minimizes the amount of channel switches, which increases the capacity of the system and decreases the number of collisions with PUs. It is shown that the allowed transmission power of an SU scales linearly with increasing primary transmission power. The results illustrate the effect of the antenna height to the maximum power; a high-antenna PU transmitter allows more powerful SUs. Moreover, simulations indicate that the power control method reduces greatly the amount of interference imposed towards PUs.
    Original languageEnglish
    Title of host publication2009 Wireless Telecommunications Symposium
    PublisherIEEE Institute of Electrical and Electronic Engineers
    ISBN (Electronic)978-1-4244-2589-1
    ISBN (Print)978-1-4244-2588-4
    Publication statusPublished - 2009
    MoE publication typeA4 Article in a conference publication
    EventWireless Telecommunications Symposium, WTS 2009 - Prague, Czech Republic
    Duration: 22 Apr 200924 Apr 2009


    ConferenceWireless Telecommunications Symposium, WTS 2009
    Abbreviated titleWTS 2009
    Country/TerritoryCzech Republic


    • radiofrequency interference
    • power control
    • radio transmitters
    • cognitive radio
    • wireless channels


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