Network domain cooperative interference location detection method and system

Abstract

The invention discloses a network domain cooperative interference position detection method and system. The method includes: capturing parallel signals and channel measurement values ​​of multiple narrowband channels, obtaining received signal energy and demodulation signal interference of multiple narrowband channels in the working frequency band The noise ratio measurement value; independently estimate the received signal energy of each narrowband channel, and perform continuous mean filtering to obtain a stable received signal energy level estimate, which is used as the estimated value of the interference detection amount of the current channel; the demodulated SINR measurement The value and the estimated value of the interference detection amount are compared with the preset detection threshold, the effective receiving channel is screened, and whether there is an interference signal in each channel; the fusion strategy is used to perform weight filtering on the detection confidence of each node in the channel to determine the interference source Location. Using the law of large numbers and fusion detection, it is possible to obtain globally consistent interference detection results and provide consistent and effective decision support for network domain anti-interference decisions.

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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