Multi-user diversity with optimal power allocation in spectrum sharing under average interference power constraint
المؤلف | Foukalas, Fotis |
المؤلف | Khattab, Tamer |
تاريخ الإتاحة | 2022-11-01T09:01:31Z |
تاريخ النشر | 2014 |
اسم المنشور | IEEE Vehicular Technology Conference |
المصدر | Scopus |
المصدر | 2-s2.0-84936852382 |
الملخص | In this paper, we investigate the performance of multi-user diversity (MUD) with optimal power allocation (OPA) in spectrum sharing (SS) under average interference power (AIP) constraint. In particular, OPA through average transmit power constraint in conjunction with the AIP constraint is assumed to maximize the ergodic secondary capacity. The solution of this problem requires the calculation of two Lagrange multipliers instead of one as obtained for the peak interference power (PIP) constraint and calculated using the well known water-filling algorithm. To this end, an algorithm based on bisection method is devised in order to calculate both Lagrange multipliers iteratively. Moreover, Rayleigh and Nakagami-m fading channels with one and multiple primary users are considered to derive the required end-to-end SNR analysis. Numerical results are depicted to corroborate our performance analysis and compare it with the PIP case highlighting hence, the impact of the AIP constraint compared to the PIP constraint application. 2014 IEEE. |
اللغة | en |
الناشر | Institute of Electrical and Electronics Engineers Inc. |
الموضوع | Bisection method Cognitive radio Fading channels Multi-user diversity Optimal power allocation Spectrum sharing |
النوع | Conference Paper |
رقم العدد | January |
رقم المجلد | 2015-January |
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