Method for improving direction finding precision of millimeter wave signals without frequency information based on partition direction finding

Abstract

The invention relates to the technical field of millimeter wave electronics, in particular to a method for improving the direction finding precision of millimeter wave signals without frequency information based on partition direction finding. The method comprises the following steps of setting a plurality of frequency band intervals according to a frequency band, selecting a plurality of frequency points falling into the frequency band intervals from millimeter waves to be measured, and ensuring that at least one frequency point exists in each frequency band interval; respectively generating a corresponding antenna pattern and a corresponding direction finding table according to the selected frequency points; and delimiting a direction finding interval in each frequency band interval, and reading the corresponding direction finding table to calculate a millimeter wave frequency point to be measured so as to obtain a direction finding angle. According to the invention, the plurality of frequency band intervals are divided, and the direction finding table is correspondingly determined; the millimeter waves also divide the to-be-measured frequency points according to the frequency bands to obtain direction-finding intervals, the frequency points of the to-be-measured millimeter waves can correspond to the direction-finding intervals, and azimuth angle measurement of the frequency points in the direction-finding intervals is performed by using the corresponding direction-finding table determined by each frequency band interval, so that the problem of large direction-finding error caused by the difference of the frequency bands is avoided, and finally, the direction finding precision of millimeter waves is improved.

Description

technical field [0001] The invention relates to the technical field of millimeter wave electronics, in particular to a method for improving the direction finding accuracy of a millimeter wave signal without frequency information based on zone direction finding. Background technique [0002] With the rapid development of millimeter wave technology and the increasingly complex space electromagnetic environment, millimeter wave technology is widely used in military and commercial products, especially in the fields of communication, radar, remote sensing and radio astronomy. Because the wavelength of the millimeter wave signal is very short, the millimeter wave signal is attenuated, scattered, changed polarization and propagation path due to the absorption of molecules in the atmosphere, the influence of precipitation, the influence of atmospheric suspended matter, and the influence of ground obstacles during the propagation process. . [0003] In practical applications, due to...

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Problems solved by technology

[0003] In practical applications, due to the propagation characteristics of millimeter waves that are prone to loss and attenuation during propagation, the direction finding work for millimeter wave signals has become increasingly difficult

It is very difficult for the current lateral system to accurately measure millimeter wave frequency. At present, the general system does not have accurate frequency information for millimeter wave signal detection, which leads to the use of only a single frequency point for millimeter wave signal direction finding without frequency information. Even if the number of channels of the extended ratio is not enough to ensure the direction finding accuracy, it is difficult to meet the direction finding accuracy requirements in the millimeter wave frequency domain

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