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Author Wenxun Qiu ♦ Baile Xie ♦ Hlaing Minn ♦ Chia-Chin Chong
Source IEEE Xplore Digital Library
Content type Text
Publisher Institute of Electrical and Electronics Engineers, Inc. (IEEE)
File Format PDF
Copyright Year ©2002
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Data processing & computer science ♦ Natural sciences & mathematics ♦ Physics ♦ Electricity & electronics
Subject Keyword Interference ♦ Time frequency analysis ♦ Optimization ♦ Resource management ♦ Approximation methods ♦ OFDM ♦ Strontium ♦ time-varying channel ♦ Underlay cognitive radio ♦ conditional average capacity ♦ interference control
Abstract Interference control is crucial in cognitive radio networks and the existing related works focus on quasi-static channels. The expansion of wireless services and applications in everyday life has necessitated support of higher mobility, as evident from the emerging wireless standards. This results in time-varying fading channels within a transmission frame for which the interference power control schemes and power allocation strategies have not been developed yet. This paper proposes several interference control and power allocation strategies with different criteria for underlay cognitive radios in time-varying frequency-selective fading channels and extend the transmission schemes to multiple secondary systems. The transmission schemes are evaluated in terms of interference statistics at the primary receiver and the ergodic capacity of the secondary user link. Simulation results over the wide Doppler range show how the proposed schemes with different criteria shape the interference at the primary receiver and the capacity of the secondary user. The results also illustrate better interference control capability of the proposed approaches over the existing scheme.
Description Author affiliation :: Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA
Author affiliation :: DOCOMO USA Lab. Inc., Palo Alto, CA, USA
ISSN 15361276
Education Level UG and PG
Learning Resource Type Article
Publisher Date 2012-01-01
Publisher Place U.S.A.
Rights Holder Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Volume Number 11
Issue Number 1
Size (in Bytes) 452.19 kB
Page Count 12
Starting Page 142
Ending Page 153


Source: IEEE Xplore Digital Library