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Cooperation detection method used for radio-frequency spectrum sensing and based on diversity combination

A technology of radio frequency spectrum and detection method, which is applied in the direction of electrical components, transmission monitoring, transmission system, etc., can solve the problems of low sensitivity and high complexity of collaborative detection, and achieve the effect of improving detection accuracy, low complexity, and high detection accuracy

Active Publication Date: 2014-09-17
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

[0003] The purpose of the present invention is to propose a cooperative detection method based on diversity combining radio spectrum sensing for the problem of low sensitivity and high complexity of cooperative detection in spectrum sensing

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  • Cooperation detection method used for radio-frequency spectrum sensing and based on diversity combination
  • Cooperation detection method used for radio-frequency spectrum sensing and based on diversity combination
  • Cooperation detection method used for radio-frequency spectrum sensing and based on diversity combination

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Embodiment Construction

[0022] Below, the present invention will be further described in conjunction with the accompanying drawings.

[0023] The present invention relates to a cooperative detection method of radio spectrum sensing based on diversity combining. The radio system includes a primary user and a sensing user, wherein the primary user is a spectrum authorized user, and the sensing user is an application spectrum user, including the following steps:

[0024] (1) Each sensing user participating in cooperative detection in the radio system detects the spectrum usage of the primary user respectively, and obtains respective detection information;

[0025] Among them, the detection signal detected by each perceived user described in step (1) can be denoted as s n (t)=h n x(t)+n n (t), where n is a natural number greater than 1, x(t) is the envelope signal of the main user signal, h n Channel gain detected for the nth perceived user, n n Additive white noise detected for the nth perceived use...

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Abstract

The invention discloses a cooperation detection method used for radio-frequency spectrum sensing and based on diversity combination. According to the cooperation detection method used for radio-frequency spectrum sensing and based on diversity combination, the frequency spectrum usage condition of a main user is detected by each sensing user in a radio system, one sensing user is selected to serve as an information fusion center, maximal-ratio combination of information, obtained through detection, of the sensing users is conducted through the information fusion center, signal energy existing after combination is obtained, a judgment is made by the information fusion center according to the signal energy of a signal obtained after combination, a main user signal exists if the signal energy of the signal obtained after combination is larger than a judgment threshold, and no main user signal exists if the signal energy of the signal obtained after combination is not larger than the judgment threshold. The radio-frequency spectrum sensing type cooperation detection method based on diversity combination, the judgment sensitivity is high, detection is accurate, and the frequency spectrum sensing performance is greatly improved.

Description

technical field [0001] The invention relates to a cognitive radio system, and is especially suitable for spectrum sensing multi-user cooperative detection in the radio system. Background technique [0002] The existing radio spectrum sensing detection methods are all single-user detection. Although the principle of single-user detection is simple and does not need to coordinate the detection time and detection consumption between users, these detection methods cannot achieve high performance in actual application scenarios. Detection performance, single-user detection has two deficiencies in hidden terminals and shadow effects. Contents of the invention [0003] The object of the present invention is to propose a cooperative detection method of radio spectrum sensing based on diversity combining to solve the problem of low sensitivity and high complexity of cooperative detection in spectrum sensing. The invention has low algorithm complexity and high detection precision, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/00
Inventor 孙志国徐松毅王迎栋
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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