Abstract
In this paper, we propose a mathematical model of aggregate co-channel interference over Rayleigh fading in cognitive networks. Unlike the statistical models in the literature that aim at finding the bound or approximation of the interference, the proposed model gives an accurate expression of probability density function (PDF), cumulative distribution function (CDF) and mean and variance of the interference, which takes into account a number of factors, such as spectrum sensing scheme, and spatial distribution of the secondary users (SUs). In particular, we focus on a more general spatial structure where there are two roles of primary users (PUs) and the interfering SUs distributed in the two-dimensional space. The framework developed in this paper is easy to be applied in power control, error evaluation and other applications.
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Foundation item: the National Natural Science Foundation of China (Nos. 61071152 and 61271316), the National Basic Research Program (973) of China (Nos. 2010CB731406 and 2013CB329605) and the National “Twelfth Five-Year” Plan for Science & Technology Support (No. 2012BAH38B04)
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Li, J., Li, Sh. A novel interference modeling scheme in cognitive networks. J. Shanghai Jiaotong Univ. (Sci.) 20, 540–547 (2015). https://doi.org/10.1007/s12204-015-1661-4
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DOI: https://doi.org/10.1007/s12204-015-1661-4