Online monitor method of transmission zero value of digital multibeam system

Abstract

The invention provides an online monitor method of a transmission zero value of a digital mulitbeam system, aiming to provide a RF closed loop online transmission zero value monitor method that monitors accurately and has no limitation on array size of a multibeam antenna and a quantity of beams. The method comprises the steps of coupling a transmission working signal containing m beams from n FRports of n channels on each sub-array, directly superposing, synthesizing and then delivering to an online monitor unit in the sub-array, measuring distance of m beam signals in one direction in realtime, calculating real-time phase-shifted values of m beams in n channels in the sub-array, and deducting a corresponding real-time phase-shifted value from a real-time distance measurement value of each beam in the sub-array, so as to obtain a real-time zero value of each beam signal; and fitting data according to signal quality so as to obtain an online monitor zero value of the sub-array, delivering online monitor zero values of all sub-arrays to an all-array online monitor unit for fitting, so as to obtain an online monitor value R0 of a transmission zero value of an all-array digital multibeam system.

Description

technical field [0001] The invention relates to an online monitoring method for equipment zero value in a digital multi-beam system. The "digital multi-beam system" here includes phased arrays, quasi-true time-delay arrays, full-true time-delay arrays, etc., and the array forms include planar arrays, curved arrays, and spherical arrays. Background technique [0002] The baseband signal generation and beam synthesis of the digital multi-beam system are both realized in the digital domain, and the synthesized digital signal is converted into an analog radio frequency signal by D / A and up-conversion, and then radiated by the antenna element to form a corresponding beam in the air. In a digital multi-beam system, in order to make the antenna beam pointing accurately, the phase and amplitude of each array element must be strictly controlled, and it can be detected and adjusted in real time according to environmental changes during all-weather operation. In practical applications...

AI Technical Summary

Problems solved by technology

Due to the large number of channels, it is impossible to measure the zero value of a single channel one by one like a single antenna

The existing zero-value calibration method is radio frequency wireless closed-loop, which relies on calibration towers or calibration poles. For systems with large arrays, calibration cannot be performed on-site, let alone online real-time calibration.

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