An Array Element Optimal Arrangement Method for Improving the Positioning Accuracy of Single-Satellite Interference Sources

Abstract

The invention relates to an array optimization layout method for improving positioning accuracy of a single-star interference source. The method is characterized in that in order to meet the requirement of high precision single-star interference positioning applications, the correlation coefficient feature is introduced into an array layout objective function, independence and uniqueness of direction vectors of the antenna array in the direction finding range are evaluated, and the layout structure of antenna array elements is optimized. The method is advantaged in that layout optimization design is performed, on one hand, the limitation of Kramer-Lowe bound on improving performance of the DOA estimation algorithm can be overcome, high-precision interference positioning processing is achieved, on the other hand, a problem of phase ambiguity caused by antenna aperture expansion can be effectively solved, the spatial resolution capacity of the array is effectively improved, and the proposed method is insensitive to influence of the system error, suitable for on-board engineering processing and can effectively support the requirement of high precision interference positioning applications based on spatial spectrum estimation.

Description

technical field [0001] The invention relates to the technical field of communication anti-jamming, in particular to an array element optimization arrangement method. Background technique [0002] Since satellite communication systems are openly exposed on space orbits and live in a complex electromagnetic environment, they are extremely vulnerable to external interference or even destruction. The complex and changeable space electromagnetic environment makes the reliability of satellite communication inevitably suffer from the threat of electromagnetic interference in the external environment. The existing satellite communication system mainly faces the threat of interference from illegal embezzlement, co-frequency business and electronic countermeasures. In order to To ensure the safety and reliability of communication, monitor the interference in the communication channel in real time and accurately obtain the location information of the interference signal, it is particul...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to face the problem exposed during the operation of the satellite communication network that is susceptible to interference from illegal earth stations and ground wireless facilities, and to focus on the research on the existing interference positioning scheme for the signal The performance improvement of the source DOA estimation algorithm itself rarely considers the optimization of the array arrangement mode, and simply increasing the array element spacing will lead to serious phase ambiguity problems. A method for optimizing the array element arrangement to improve the positioning accuracy of single-satellite interference sources is proposed. Meet the application requirements of space-based information system interference location system construction

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