Abstract
According to the problem that the detection performance of the whole cooperative spectrum detection system is reduced due to the low Signal to noise ratio(SNR) of some perceived nodes in complex electromagnetic environment, an improved method of multi-node cooperative spectrum blind detection based on correlation coefficient is proposed. This method uses the characteristics of the received signal correlation function, combines the square rate combination to construct a new test statistic and deduces the threshold formula. This method effectively improves the problem of degraded cooperative spectrum detection performance due to the different SNR of each sensor node, improves the spectrum detection probability, and the computer simulation results verify the effectiveness of the method.
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