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Interference detection method used in wireless sensor network and detection device thereof

A wireless sensor, interference detection technology, applied in the direction of shaping network, sustainable building, climate sustainability, etc. in the transmitter/receiver The sensor network detects problems such as interference to achieve the effect of interfering with signal strength

Inactive Publication Date: 2011-07-27
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above existing technologies can meet the characteristics of self-organization and low power consumption of wireless sensor networks, and cannot meet the needs of wireless sensor networks for detecting interference.

Method used

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  • Interference detection method used in wireless sensor network and detection device thereof
  • Interference detection method used in wireless sensor network and detection device thereof
  • Interference detection method used in wireless sensor network and detection device thereof

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Embodiment Construction

[0025] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0026] Such as figure 1 As shown, this embodiment includes the following steps:

[0027] The first step is to perform fast Fourier transform on the received signal to be detected to obtain the frequency spectrum X(n) of the time domain signal;

[0028] The second step is to distinguish the transmission signal and the interference signal by analyzing the sequence X(n), and obtain the corresponding frequency amplitude sequence X 1 (n 1 ), X 2 (n 2 ); the specific analysis method is as follows:

[0029] Analysis method for multi-tone interference:

[0030] After the received signal r(n) to be detected undergoes...

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Abstract

The invention relates to a method and a device in the technical field of a wireless sensor network, in particular to an interference detection method used in a wireless sensor network and a detection device thereof. The method comprises the following steps: carrying out fast fourier transform on a domain signal received by a receiver to obtain the frequency spectrum of the domain signal; sequentially carrying out multitone interference detection and partial frequency band interference detection on the frequency spectrum of the domain signal to obtain the frequency spectrums X1 (n1) and X2 (N2) of a transmission signal and an interference signal; and finally, calculating the power ratio of the transmission signal and the interference signal, and detecting and judging whether the interference signal exists or not when the power ratio is less than an interference threshold. By the invention, the received signal is reasonably judged, so that whether the interference exists in the network can be more accurately judged.

Description

technical field [0001] The present invention relates to a method and device in the technical field of wireless sensor networks, in particular to an interference detection method and detection device for wireless sensor networks. Background technique [0002] Due to its broad application prospects in military defense, industry and agriculture, urban management, biomedicine, environmental monitoring, emergency rescue and disaster relief, wireless sensor networks have attracted great attention from the world's academic and industrial circles and triggered an upsurge in wireless sensor network research. . A wireless sensor network is a network composed of large-scale randomly arranged wireless sensor nodes for the purpose of sensing the real physical space. However, due to the openness of wireless channels, there are various wireless communication devices in the real environment, and these wireless communication devices will inevitably introduce spatial interference in the wire...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04L27/26
CPCY02B60/50
Inventor 朱燕民姜源
Owner SHANGHAI JIAO TONG UNIV