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

A spectrum and automatic technology, which is applied in wireless communication, electrical components, network planning, etc., can solve the problems of perception performance constraints, coarse judgment state distinction granularity, etc., and achieve the effect of being convenient for practical promotion and application, easy to implement, and improving perception accuracy

Active Publication Date: 2022-03-01
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 re-sensing method, system, computer-readable storage medium and terminal
  • Automatic spectrum re-sensing method, system, computer-readable storage medium and terminal
  • Automatic spectrum re-sensing method, 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 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 itself by Δ i (...

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 present invention provides an automatic spectrum re-sensing method, system, computer-readable storage medium, and terminal. The automatic spectrum re-sensing method includes: step 1, the cognitive user uses at least two detection antennas to detect the transmission situation of the primary user, 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 a communication signal or the primary user is not currently transmitting a communication signal; step 2, the cognitive user according to the A comprehensive decision is made on the detection result or detection content of the detection antenna to determine whether to perform automatic spectrum re-sensing. The present invention can significantly improve the granularity of spectrum sensing judgment state distinction, and compared with the existing sensing technology, the sensing accuracy is significantly improved under the same system parameters; it has a wide range of applications, is applicable to various types of spectrum sensing technologies, and is easy to implement without requiring Change the hardware structure of the existing system to facilitate practical promotion 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 (cognitive radio, CR) technology has received widespread 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...

Claims

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Application Information

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Patent Type & Authority Patents(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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