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The performance of cooperative spectrum sensing (CSS) with double threshold and censoring of cognitive radios (CRs) has been evaluated using maximal ratio combining (MRC) in the presence of Rayleigh faded sensing (S) and reporting (R) channels. Each CR senses the primary user through sensing channel and evaluates the energy of the received signal at its sensing channel input and performs double threshold based spectrum sensing. The qualified CRs are censored and only the selected CRs report their decisions to fusion centre. Censoring of CRs is done on the basis of the quality of R-channel. Typically two types of censoring such as rank-based and threshold-based censoring are considered to select the best CR based on the quality of the R-channels. The censoring of CRs not only improves the detection performance but also reduces the transmission overhead. The performance of CSS …