Network domain cooperation interference position detection method and system

Abstract

The invention discloses a network domain cooperative interference position detection method and system, and the method comprises the steps: capturing parallel signals and channel measurement values of a plurality of narrowband channels, and obtaining the received signal energy and demodulation signal to interference plus noise ratio measurement values of the plurality of narrowband channels in a working frequency band; independently estimating the received signal energy of each narrowband channel, and performing continuous mean filtering to obtain stable received signal energy level estimation as an interference detection quantity estimation value of the current channel; comparing the demodulation signal to interference plus noise ratio measurement value and the interference detection quantity estimation value with a preset detection threshold value, screening effective receiving channels, and judging whether interference signals exist in each channel or not; carrying out weight filtering on the detection confidence of each node in the channel by adopting a fusion strategy, and determining the position of an interference source. By adopting a large number law and fusion detection, a globally consistent interference detection result can be obtained, and consistent and effective decision-making support is provided for network domain anti-interference decision-making.

Description

technical field [0001] The present invention relates to the technical field of communication signal detection, in particular to a method and system for detecting network domain cooperative interference locations. Background technique [0002] In order to realize the anti-interference of wireless communication, interference detection technology is an important link in the field of signal detection, the purpose is to judge whether there is interference, and provide necessary prior information for subsequent anti-interference measures. [0003] Typical interference detection techniques include: energy detection algorithm, matched filter detection algorithm, cyclostationary detection method, covariance matrix decomposition algorithm, etc. [0004] The energy detection algorithm first makes two test hypotheses (H1 / H0) according to whether the interference signal exists or not, then calculates the detection statistics of the received signal, compares it with the set threshold valu...

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Problems solved by technology

[0009] Pure energy detection has two disadvantages: on the one hand, there is a near-far effect in wireless communication systems, and pure energy detection cannot effectively distinguish between large signals and interference signals, resulting in misjudgment of interference; on the other hand, as a binary detection, pure energy detection Unable to accurately locate the specific frequency point position of narrowband interference

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