Spectrum sensing method, spectrum sensing system, client and server

A technology of spectrum sensing and energy sensing, which is applied in the fields of spectrum sensing method and spectrum sensing system, client and server, can solve the problems of high implementation complexity, large amount of calculation of matched filter method, deterioration of sensing performance, etc., and achieve accurate detection High precision, reduced complexity, improved detection accuracy and detection speed

Active Publication Date: 2016-06-15
CHINA UNITED NETWORK COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The advantage of the matched filtering method is that it can obtain high processing gain in a short time, but using the matched filtering method for signal detection, it is necessary to know the prior knowledge of the detected interference user signal, such as modulation mode, pulse waveform, data packet format, etc. If the information is inaccurate, the perception performance will be severely deteriorated. At the same time, the matching filter method has a large amount of calculation and high implementation complexity. It is usually used to detect certain specific signals.
[0006] In the current traditional spectrum sensing method, a receiving end only adopts one spectrum sensing method

Method used

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  • Spectrum sensing method, spectrum sensing system, client and server
  • Spectrum sensing method, spectrum sensing system, client and server
  • Spectrum sensing method, spectrum sensing system, client and server

Examples

Experimental program
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Embodiment 1

[0050] This embodiment provides a spectrum sensing method, such as figure 1 shown, including:

[0051] Step 1: Use the energy sensing method to determine whether the interference signal exists.

[0052] Step 2: Use the cyclic spectrum feature perception method to judge whether the interference signal exists.

[0053] Step 3: Determine whether an interfering user exists according to the judgment result of the energy sensing mode and the judgment result of the cyclic spectrum feature sensing mode.

[0054] Among them, the energy sensing method and the cyclic spectral feature sensing method are relatively mature spectrum sensing methods, and the cyclic spectral feature sensing method uses the autocorrelation matrix instead of the frequency domain smoothing method to calculate the spectral feature of the signal. The specific algorithms involving the two perception methods will not be described in detail here.

[0055] In this embodiment, the energy sensing method is applicable ...

Embodiment 2

[0057] This embodiment provides a spectrum sensing method, such as figure 2 shown, including:

[0058] Step 1: Use the energy sensing method to determine whether the interference signal exists.

[0059] This step specifically includes: Step 10: Detecting the received signal energy within a set time.

[0060] Wherein, the setting time can be set arbitrarily.

[0061] Step 11: Compare the detected signal energy accumulation value with the set threshold value; when the signal energy accumulation value is less than or equal to the threshold value, perform step 12: judge that the interference signal does not exist; for example: at this time, the spectrum sensing The status flag of the result is set to 0; when the signal energy accumulation value is greater than the threshold value, perform step 13: judge that the interference signal is suspected to exist, for example: set the status flag of the spectrum sensing result to 1 at this time.

[0062] When it is judged that the inter...

Embodiment 3

[0070] This embodiment provides a spectrum sensing system, such as image 3 As shown, it includes a first judging unit 1, which is used to judge whether an interference signal exists by using an energy sensing method; a second judging unit 2, which is used to judge whether an interference signal exists by using a cyclic spectrum feature sensing method; The judging result of the sensing mode and the judging result of the cyclic spectrum feature sensing mode determine whether an interfering user exists.

[0071] In this embodiment, the first judging unit 1 includes: a detection module 11, configured to detect the received signal energy within a set time. The first comparison module 12 is used to compare the detected signal energy accumulation value with the set threshold value. The first judging module 13 is used for judging that the interference signal does not exist when the signal energy accumulation value is less than or equal to the threshold value; when the signal energy ...

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Abstract

The invention provides a spectrum sensing method, a spectrum sensing system, a client and a server. The spectrum sensing method includes the following steps that: an energy sensing mode is adopted to judge whether interference signals exist; a cyclic spectrum characteristic sensing mode is adopted to judge whether interference signals exist; and whether interference users exist is judged according to the judgment results of the energy sensing mode and the cyclic spectrum characteristic sensing mode. According to the spectrum sensing method, the energy sensing mode and the cyclic spectrum characteristic sensing mode are adopted to perform mixed sensing on spectra, so that coarse sensing and fine sensing combined spectrum hybrid sensing can be realized, and therefore, the precision and speed of detection for the interference users can be improved.

Description

technical field [0001] The present invention relates to the technical field of communications, and in particular, to a spectrum sensing method, a spectrum sensing system, a client and a server. Background technique [0002] In the LTE system, the UE in its own channel is an authorized user, and there is no need to consider whether it will affect the communication of other users in the channel during communication. However, considering the interference of potential interfering users on their own communication, spectrum sensing can be performed on the channel to avoid the signal being communicated, so that their own communication will not be affected. [0003] In the LTE system, if the cognitive channel can be used cognitively, spectrum utilization can be improved. In this part of the frequency band, the cognitive users of the LTE system are secondary users, and the behavior of occupying the unlicensed frequency band will affect the communication of other licensed users that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/382H04B17/345
CPCH04B17/345H04B17/382
Inventor 程刚陈广泉
Owner CHINA UNITED NETWORK COMM GRP CO LTD
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