Adaptive Mutual Interference Suppression Method Based on GNSS Correlation Peak Detector

Abstract

The invention discloses a self-adaptive mutual interference restraining method based on a GNSS (global navigation satellite system) related peak value detector. A navigation receiver is utilized to simultaneously receive a desired signal and an interference signal so as to obtain an influence relation captured by the interference signal to the desired signal, then grids are built on code delay and Doppler shift between two adjacent integer multiples when the Doppler shift delta f of the desired signal and the interference signal is KHz, and a GNSS mutual interference related peak value detector based on chi <2> distribution discrimination hypothesis testing is built by aiming at each grid. If mutual correlation interference is detected, GNSS mutual interference signals are searched to build corresponding interference subspaces, self-adaptive sub-space projection algorithm is utilized for interference suppression, mutual interference suppression gains of output segment signals are served as the judging criteria of an error, and the error is judged to determine whether the desired signal is acquired or not. If the error is excessively great, and the desired signal is not acquired, subspace projection is performed again for interference suppression until the desired signal meeting the requirements is acquired.

Description

technical field [0001] The invention belongs to the communication field and relates to a method for suppressing mutual interference signals of a satellite navigation system. Background technique [0002] The Global Navigation Satellite System (GNSS) is a system developed by countries for military or civilian purposes that uses satellites to provide position and time. From missiles, fighter planes and warships to automobiles, civil aircraft, personal computers and even handheld communication devices, satellite navigation and positioning technology can be used almost everywhere. [0003] With the development of satellite navigation technology and the continuous expansion of its application fields, many countries in the world are stepping up the construction of independent satellite navigation systems. The United States is implementing the GPS modernization plan, Russia is stepping up to restore the full performance of GLONASS, the European Union is building GALILEO, and China...

AI Technical Summary

Problems solved by technology

[0007] The technical problem solved by the present invention is to overcome the deficiencies of the prior art and provide an adaptive mutual interference suppression method based on GNSS correlation peak detectors, which not only solves the problem of signal detection when satellite navigation system signals interfere with each other, but also can Effective suppression and elimination of detected mutual interference signals

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