9th International Conference on Cognitive Radio Oriented Wireless Networks

Research Article

A Hybrid Cognitive Transceiver Architecture: Sensing-Throughput Tradeoff

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  • @INPROCEEDINGS{10.4108/icst.crowncom.2014.255366,
        author={Shree Krishna Sharma and Symeon Chatzinotas and Bjorn Ottersten},
        title={A Hybrid Cognitive Transceiver Architecture: Sensing-Throughput Tradeoff},
        proceedings={9th International Conference on Cognitive Radio Oriented Wireless Networks},
        keywords={hybrid transceiver cognitive radio sensing-throughput tradeoff spectrum sensing underlay},
  • Shree Krishna Sharma
    Symeon Chatzinotas
    Bjorn Ottersten
    Year: 2014
    A Hybrid Cognitive Transceiver Architecture: Sensing-Throughput Tradeoff
    DOI: 10.4108/icst.crowncom.2014.255366
Shree Krishna Sharma1,*, Symeon Chatzinotas1, Bjorn Ottersten1
  • 1: SnT, University of Luxembourg
*Contact email: shree.sharma@uni.lu


Spectrum Sensing (SS) and underlay have been considered as two important techniques for enabling the spectral coexistence of the licensed and unlicensed wireless communication systems. The SS only approach ignores the interference tolerance capability of the Primary Users (PUs) while assuming the bursty PU traffic whereas the possibility of having secondary transmission with full power is neglected in an underlay based approach. To address this, it's crucial to investigate suitable hybrid spectrum awareness and transmission strategies which can overcome the aforementioned drawbacks and achieve higher secondary throughput while protecting the PUs. In this context, we propose a hybrid cognitive transceiver which combines the SS approach with the power control based underlay approach. Furthermore, we evaluate the performance of the proposed hybrid approach considering both periodic sensing and simultaneous sensing/transmission schemes. Moreover, sensing-throughput tradeoff for the proposed hybrid approach is investigated and the performance is compared with the conventional SS only approaches in terms of the achievable throughput. It is shown that the proposed scheme can achieve a significant improvement in the secondary throughput over the conventional approaches while respecting the interference constraints of the PUs.