Automatic spectrum further sensing method and system, computer readable storage medium and terminal

A spectrum and automatic technology, applied in electrical components, wireless communication, network planning, etc., can solve the problems of coarse judgment state distinction and perception performance constraints, and achieve easy implementation, practical promotion and application, and improve the judgment state distinction granularity Effect

Active Publication Date: 2018-06-29
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Therefore, how to provide an automatic spectrum re-sensing method, system, computer-readable storage medium, and terminal to solve the limitation of the existing technology by the user terminal equipment, use a single antenna at the receiving end for processing, and the judgment state of spectrum sensing has a relatively small granularity rough, perception performance is more restricted and other defects, has become a technical problem to be solved urgently by those skilled in the art

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  • Automatic spectrum further sensing method and system, computer readable storage medium and terminal
  • Automatic spectrum further sensing method and system, computer readable storage medium and terminal
  • Automatic spectrum further sensing method and system, computer readable storage medium and terminal

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Embodiment 1

[0036] This embodiment provides an automatic spectrum re-sensing method, which is applied to cognitive users; the automatic spectrum re-sensing method includes:

[0037] Step 1: The cognitive user uses at least two detection antennas to detect the transmission situation of the primary user, so as to obtain the detection result of the detection antenna or the collected detection content; the transmission situation of the primary user includes that the primary user is currently transmitting communication The signal or primary user is not currently transmitting a communication signal;

[0038] Step 2: The cognitive user makes a comprehensive decision based on the detection result or content of the detection antenna to determine whether to perform automatic spectrum re-sensing.

[0039] The automatic spectrum re-sensing method provided by this embodiment will be described in detail below with reference to illustrations. The automatic spectrum re-sensing method described in this e...

Embodiment approach

[0058] An implementation of the automatic spectrum re-sensing method specifically includes the following steps:

[0059] S31, after the communication signals are respectively detected by the I detection antennas on the cognitive user, the signal r after the cyclic shift Δ with itself i (n+Δ) performs an autocorrelation operation to obtain the signal feature F on each detection antenna i . In this embodiment, each detection antenna independently performs its own decision process. where the communication signal on the i-th antenna (i∈[1,I]) can be expressed as r i (n)=h i s(n)+v i (n), where h i =[h i1 , h i2 ] is the channel state between the two transmit antennas of the primary user and the i-th detection antenna of the cognitive user, s(n)=[s 1 (n),s 2 (n)] T , v i (n) represents the additive white Gaussian noise on the i-th antenna.

[0060] Each detection antenna receives its own r i (n) After the collection is complete, the signal r after cyclic shift with its...

Embodiment 2

[0126] This embodiment provides an automatic spectrum re-sensing system. It should be noted that it should be understood that the division of each module of the automatic spectrum re-sensing system is only a division of logical functions, and can be fully or partially integrated into one during actual implementation. In physical entities, they can also be physically separated. And these modules can all be implemented in the form of calling software through processing elements; they can also be implemented in the form of hardware; some modules can also be implemented in the form of calling software through processing elements, and some modules can be implemented in the form of hardware. For example, the x module can be a separate processing element, and can also be integrated in a chip of the above-mentioned device. In addition, it can also be stored in the memory of the above-mentioned device in the form of program code. Call and execute the function of the above x module. Th...

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Abstract

The invention provides an automatic spectrum further sensing method, an automatic spectrum further sensing system, a computer readable storage medium and a terminal. The automatic spectrum further sensing method comprises the steps as follows: 1, a cognitive user uses at least two monitoring antennas to monitor the transmission situation of a main user to acquire monitored results of the monitoring antennas or the collected monitored content; the transmission situation of the main user comprises a communication signal transmitted currently or a communication signal that is not transmitted currently by the main user; and 2, the cognitive user performs comprehensive decision making according to the monitored results or monitored content of the monitoring antennas, so as to judge whether to execute the automatic further sensing of the spectrum. According to the method, the system, the medium and the terminal provided by the invention, the judgment state distinguishing granularity of spectrum sensing can be significantly enhanced, compared with the existing sensing technology, the method significantly improves sensing accuracy under equal system parameters; the method is wide in application range, applicable to various types of spectrum sensing technologies, easy to implement without changing the hardware structure of the existing system, and convenient for actual popularization and application

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a sensing method and system, in particular to an automatic spectrum re-sensing method, system, computer-readable storage medium and terminal. Background technique [0002] In recent years, with the development of wireless communication technology and the popularization of smart terminals, mobile users' demand for data communication has increased significantly, which has brought enormous pressure to limited spectrum resources. In order to make more effective use of spectrum resources, cognitive radio (CR) technology has attracted extensive attention from academia and industry. The CR network is composed of primary users and cognitive users. Cognitive users can identify blank frequency bands that are not currently used by primary users through spectrum sensing technology, and use these spectrum resources for temporary data transmission. Therefore, in CR networks, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14
CPCH04W16/14
Inventor 徐天衡张梦莹胡宏林
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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