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Outage Analysis of Spectrum Sharing Over M-Block Fading With Sensing Information
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS. King Abdullah University of Science and Technology, Thuwal, Saudi Arabia.
2017 (English)In: IEEE Transactions on Vehicular Technology, ISSN 0018-9545, E-ISSN 1939-9359, Vol. 66, no 4, 3071-3087 p.Article in journal (Refereed) Published
Abstract [en]

Future wireless technologies, such as fifth-generation (5G), are expected to support real-time applications with high data throughput, e.g., holographic meetings. From a bandwidth perspective, cognitive radio (CR) is a promising technology to enhance the system's throughput via sharing the licensed spectrum. From a delay perspective, it is well known that increasing the number of decoding blocks will improve system robustness against errors while increasing delay. Therefore, optimally allocating the resources to determine the tradeoff of tuning the length of the decoding blocks while sharing the spectrum is a critical challenge for future wireless systems. In this paper, we minimize the targeted outage probability over the block-fading channels while utilizing the spectrum-sharing concept. The secondary user's outage region and the corresponding optimal power are derived, over two-block and M-block fading channels. We propose two suboptimal power strategies and derive the associated asymptotic lower and upper bounds on the outage probability with tractable expressions. These bounds allow us to derive the exact diversity order of the secondary user's outage probability. To further enhance the system's performance, we also investigate the impact of including the sensing information on the outage problem. The outage problem is then solved via proposing an alternating optimization algorithm, which utilizes the verified strict quasi-convex structure of the problem. Selected numerical results are presented to characterize the system's behavior and show the improvements of several sharing concepts.

Place, publisher, year, edition, pages
IEEE Press, 2017. Vol. 66, no 4, 3071-3087 p.
Keyword [en]
Alternating algorithm, block-fading (BF) channel, outage probability, resource allocation, spectrum sensing, spectrum sharing
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-207700DOI: 10.1109/TVT.2016.2590828ISI: 000399749500015Scopus ID: 2-s2.0-85018304827OAI: oai:DiVA.org:kth-207700DiVA: diva2:1103622
Note

QC 20170530

Available from: 2017-05-30 Created: 2017-05-30 Last updated: 2017-08-02Bibliographically approved

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Citation style
  • apa
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