Amplitude-phase combined measuring method measuring coning wave direction information

Abstract

The invention discloses an amplitude-phase combined measuring method measuring coning wave direction information; the method can effectively reduce the dependence relation of the phase difference measuring precision with the antenna array dimensions, and can effectively reduce the antenna array dimension; the method comprises the following steps: in a radio direction finding scene, a radio direction finding system employs direction finding antennas of a plurality of array elements to form a multi-channel direction finding antenna array so as to capture coming wave radiation signals; a radio direction finding device uses a radio frequency switch to control a radio frequency channel to select an input antenna signal or a calibration signal, and the radio frequency channel simulates, convertsfrequency, filters and amplifies and outputs the signal to a processing module; the processing module associates obtained space coming wave amplitudes with the phase difference information so as to obtain the coming wave characteristic vectors, selects samples from a sample database according to the signal frequency received in real time, and carries out Euclidean distance operation according tothe real time calculated association vectors and the sample data from the sample database, thus determining the distance extreme value, and obtaining the direction of the coming wave signals.

Description

technical field [0001] The invention relates to a kind of navigation, aviation, target detection and spectrum monitoring, which can observe the electromagnetic radiation signal generated by the incoming wave target in the aspects of radio frequency spectrum monitoring, etc., and after comprehensive processing, the signal amplitude and phase difference can be obtained and correlated, so that The method of obtaining the direction of the incoming wave target. More specifically, for the electromagnetic signal radiated by space targets, the method of direction finding is based on the amplitude and phase difference correlation information and using the sample library to correlate with it, that is, the method of amplitude-phase joint measurement of incoming wave azimuth information. Background technique [0002] With the wide application of radio spectrum resources and the increasing popularity of radio communications, in order to use limited spectrum resources in an orderly and re...

AI Technical Summary

Problems solved by technology

The direction-finding antenna of this system is a small foundation, the direction-finding sensitivity and anti-wavefront distortion are limited, and the multi-channel system is complex; the dual-channel receiver achieves consistent amplitude and phase, which has certain technical difficulties

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