Method for realizing wideband direction finding by utilizing three-dimension orthogonal interferometer

Abstract

The invention provides a method for realizing wideband direction finding by utilizing three-dimensional orthogonal interferometer. Seven-array element three-dimensional orthogonal antenna array is utilized, a phase discriminator set is adopted to respectively detect phase differences of array elements 1-6 and a reference array element 0, according to cyclophysis of the phase difference, traversing searching is carried out on possible phase cycles and all the possible signal frequencies, azimuth angles and pitch angles are solved, and finally the signal frequency roughly measured by a receiver is taken as reference, one group of traversing values with minimum error are found, and the group of values are estimated signal frequency, azimuth angle and pitch angle. The method of the invention can be applied to place requiring frequency and angle estimation in the fields of communication, radar and wireless monitoring, calculated amount is less, no strict restriction on the position of antenna array element is required, and wideband angle estimation can be realized, thus having great application value.

Description

technical field [0001] The invention relates to a radio direction-finding technology, in particular to a method for estimating azimuth and elevation angles of wide-band electromagnetic wave signals. Background technique [0002] Radio direction finding is an electronic technology used to measure the direction of arrival of electromagnetic wave signals to determine the location of a working radio transmitter. Because this technology has important and extensive applications in many fields such as radio monitoring and communication, many methods of direction finding have been proposed, among which the interferometer direction finding based on signal phase difference has the advantages of high direction finding accuracy, simple algorithm, and high speed. The advantages of being fast are generally favored. For two-element interferometers, when the distance between the antenna elements is less than half the wavelength of the incident signal, there is no problem of ambiguity in th...

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Problems solved by technology

[0003] 1. There are relatively strict restrictions on the position of the interferometer array, so the applicable environment is limited;

[0004] 2. For two-dimensional direction finding (obtaining azimuth and elevation angle at the same time), the number of array elements of the interferometer array increases, the complexity of the system increases, and the calculation amount of defuzzification increases at the same time;

[0005] 3. It is impossible to realize the direction finding of any frequency signal, and it can only be limited to a wider frequency band

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