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    Outage analysis of selective cooperation in underlay cognitive networks with fixed gain relays and primary interference modeling

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    Type
    Conference Paper
    Authors
    Hussain, Syed Imtiaz
    Alouini, Mohamed-Slim cc
    Qaraqe, Khalid A.
    Hasna, Mazen Omar
    KAUST Department
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    Communication Theory Lab
    Date
    2012-09
    Permanent link to this record
    http://hdl.handle.net/10754/564602
    
    Metadata
    Show full item record
    Abstract
    Selective cooperation is a well investigated technique in non-cognitive networks for efficient spectrum utilization and performance improvement. However, it is still a nascent topic for underlay cognitive networks. Recently, it was investigated for underlay networks where the secondary nodes were able to adapt their transmit power to always satisfy the interference threshold to the primary users. This is a valid assumption for cellular networks but many non-cellular devices have fixed transmit powers. In this situation, selective cooperation poses a more challenging problem and performs entirely differently. In this paper, we extend our previous work of selective cooperation based on either hop's signal to noise ratio (SNR) with fixed gain and fixed transmit power relays in an underlay cognitive network. This work lacked in considering the primary interference over the cognitive network and presented a rather idealistic analysis. This paper deals with a more realistic system model and includes the effects of primary interference on the secondary transmission. We first derive end-to-end signal to interference and noise ratio (SINR) expression and the related statistics for a dual-hop relay link using asymptotic and approximate approaches. We then derive the statistics of the selected relay link based on maximum end-to-end SINR among the relays satisfying the interference threshold to the primary user. Using this statistics, we derive closed form asymptotic and approximate expressions for the outage probability of the system. Analytical results are verified through simulations. It is concluded that selective cooperation in underlay cognitive networks performs better only in low to medium SNR regions. © 2012 IEEE.
    Citation
    Hussain, S. I., Alouini, M.-S., Qaraqe, K., & Hasna, M. (2012). Outage analysis of selective cooperation in underlay cognitive networks with fixed gain relays and primary interference modeling. 2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC). doi:10.1109/pimrc.2012.6362529
    Publisher
    Institute of Electrical and Electronics Engineers (IEEE)
    Journal
    2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC)
    Conference/Event name
    2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC 2012
    ISBN
    9781467325691
    DOI
    10.1109/PIMRC.2012.6362529
    ae974a485f413a2113503eed53cd6c53
    10.1109/PIMRC.2012.6362529
    Scopus Count
    Collections
    Conference Papers; Electrical and Computer Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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