Baseline selection method based on long-short baseline interferometer direction-finding system

Abstract

The invention discloses a baseline selection method based on a long-short baseline interferometer direction-finding system. A long-short baseline interferometer angle-measurement principle is utilizedto combine MATLAB simulation for long-short baseline unambiguity angle-measurement modeling and simulation, system parameters of interferometer ambiguity resolution ability, measured angles and the like under different baseline size combinations are analyzed through setting different frequencies, an optimal baseline size structure configuration of a long-short baseline angle-measurement model under a known working frequency band is given, that is, the direction-finding system is enabled to have widest baseline phase error tolerance through selecting appropriate size relationships of long-short baselines on the premise of giving a system working frequency range and an angle-measurement range, thus a success rate of angle-measurement unambiguity of the type of interferometer is improved ina case of a larger phase error, and direction-finding performance of a direction-finding system using the long-short baseline interferometer direction-finding system in actual application and influences of the system and an environment is improved.

Description

technical field [0001] The invention relates to a baseline selection method, in particular to a baseline selection method based on a long-short baseline interferometer direction-finding system. Background technique [0002] The interferometer direction finding system has the advantages of simple algorithm, high precision and high sensitivity, and has become a direction finding system widely used in the world. It can not only perform two-dimensional accurate direction finding for azimuth and elevation angles at the same time, but also is insensitive to the polarization error and amplitude of the signal. The antenna layout is relatively flexible, and it is suitable for various applications such as vehicle and airborne. [0003] The monitoring and reception of broadband signals make the direction finding of the interferometer have to face the processing of high-frequency signals and ensure that the low-frequency bands also have high angle measurement accuracy. These technical r...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a baseline selection method based on the long-short-baseline interferometer direction-finding system, to solve the problem of high-precision angle measurement and angle-measurement deambiguation of the traditional long-short-baseline interferometer lateral system in a large interference environment in specific engineering applications. The problem of design inconsistencies between

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