Cooperative spectrum sensing method of low complexity
A cooperative spectrum and low-complexity technology, applied in the field of low-complexity cooperative spectrum sensing, can solve problems such as low complexity, reduced cooperative sensing performance, and high computational complexity, achieving good robustness, good feasibility and practicality Sexuality and the effect of not being easily affected by the environment
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[0026] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.
[0027] Such as figure 1 As shown, this embodiment includes the following steps:
[0028] In the first step, the cognitive users participating in cooperative sensing sample the authorized user signal, and obtain the sampling sequence of the authorized user signal {x(1), x(2), ..., x(N 1 )}. Among them, N 1 is the length of the sampling sequence, x(t)=s(t)+n(t), s(t) is the mean value is 0, and the variance is Gaussian process, n(t) is mean 0, variance is additive Gaussian noise.
[0029] N in this example 1 =1000.
[0030] In the second step, the sampling sequence signal is passed through a square law devi...
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