Signal detection method and device and computer storage medium

Abstract

The embodiment of the invention discloses a signal detection method and device and a computer storage medium. The method comprises the following steps: acquiring k-order sample cumulant of a signal sample and a sample cumulant vector of the signal sample according to the signal sample of a received signal; obtaining a covariance matrix according to the k-order sample cumulant of the signal sample;constructing a test statistic according to the covariance matrix and the sample cumulant vector of the signal sample; according to the probability density of the sample cumulant vector of the signalsample, determining a power judgment domain corresponding to the working state of the authorized user according to a maximum posterior probability criterion; and judging according to the test statistics and the power judgment domain, and determining the working state of the authorized user.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a signal detection method, device and computer storage medium. Background technique [0002] With the development of communication technology, the contradiction between the increasing spectrum demand and limited spectrum resources has become one of the main factors restricting the development of wireless communication. Under the current situation, the concept of cognitive radio with the core idea of ​​spectrum sensing and intelligent learning of the system emerges as the times require, and it is expected to realize dynamic spectrum allocation and spectrum sharing. Cognitive radio technology includes three key technologies: spectrum sensing, dynamic spectrum allocation, and wireless spectrum management; among them, spectrum sensing technology has become a research hotspot because of its fundamental role. [0003] In conventional wireless communication systems, i...

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Problems solved by technology

Therefore, in the actual cognitive environment, it is impossible to detect non-Gaussian signals

[0008] However, the existing signal detection schemes in the multi-master transmission power transmission process under the condition of non-Gaussian signals all have the problems of not being able to make full use of the rich statistical information of the received signal and having a large amount of calculation.

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