%0 Journal Article
%A ZHOU Yi-ming
%A ZHOU Zheng
%T The Algorithm about Secondary Users Selection and SNR Estimation in Cooperative Spectrum Sensing
%D 2013
%R 10.13190/j.jbupt.2013.06.023
%J Journal of Beijing University of Posts and Telecommunications
%P 108-112
%V 36
%N 6
%X <p>An algorithm was proposed, which can choose secondary users and estimate signal to noise ratio (SNR) in order to improve the accuracy of cooperative spectrum sensing. The algorithm constructs a correlation matrix by means of the related characteristics of the signals of secondary users. According to the properties of matrix elements, some parameters of channels, e.g. ratio of channels gain, SNR and variance of noise were estimated. The realization of the algorithm was only based on the sampled signals of secondary users without any prior knowledge of primary users. The number of secondary users must be greater than three in cooperative spectrum sensing network. Simulations testify the effects of the algorithm about SNR and the ratio of channel gain.</p>
%U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2013.06.023