Direction finding device for phase interferometer and phase spectrum interferometer based on multiple baselines

Abstract

The invention discloses a direction finding device for a phase interferometer and a phase spectrum interferometer based on an orthogonal / non-orthogonal multiple baselines. According to direction-finding algorithms of the phase interferometer and the phase spectrum interferometer, the direction finding device is designed by integrally considering factors such as an actual direction-finding environment, the frequency range of an incident signal, the direction-finding requirement, hardware sources and the like. According to the direction finding device, the processing of a digital signal is cooperatively finished by two FPGAs (Field Programmable Gate Array) and a DSP (Digital Signal Processor); and two direction-finding algorithms of the phase interferometer and the phase spectrum interferometer based on the orthogonal / non-orthogonal multiple baselines are realized respectively for a narrow frequency band single-source signal and a wide frequency band multi-source signal. The direction finding device has the advantages of simple algorithm, high speed of calculation, higher direction finding precision and lower requirement on hardware resources; and the direction finding device can beused in application occasions such as quick acquisition of two-dimensional arrival direction of a single-source or multi-source signal and the like.

Description

technical field [0001] The invention relates to a multi-baseline-based phase-phase spectrum interferometer direction-finding device, in particular to a digital processing algorithm and a corresponding hardware unit in the direction-finding device. Background technique [0002] Passive positioning technology is a technology that uses the electromagnetic radiation of the detected target itself to achieve target positioning. Since the positioning system itself does not emit electromagnetic waves, it can avoid anti-radar equipment, detect and locate targets covertly, and has a series of advantages such as strong anti-interference ability and long working distance. [0003] One of the cores of passive positioning technology lies in the high-precision direction finding of electromagnetic radiation sources. At present, many direction finding algorithms have been put into practical application. Compared with the spatial spectrum direction-finding algorithm that requires two-dimens...

AI Technical Summary

Problems solved by technology

Previously, people paid more attention to the problem of phase ambiguity resolution, and a variety of deblurring methods based on multi-baselines (including the correlation interferometer method) have been proposed. The implementation details of the phase interferometer algorithm combined with the actual hardware platform

Images