Method and device for calibrating antenna array in complex electromagnetic environment

Abstract

The invention discloses a method and a device for antenna array calibration under complex electromagnetic environment. The device transmits calibration signals from a center point of an antenna array, and extracts array antennas and receives front-end amplitude inconsistency and phase inconsistency by means of wiener solution according to the principle of adaptive filter. The influence of small-amplitude same frequency interference or adjacent channel interference upon the result of frequency array calibration can be inhibited automatically in the complex electromagnetic environment with intense interference. When high-amplitude same frequency interference or adjacent channel interference has great influence on channel parameters, the extracted channel parameters can be processed to eliminate or greatly weaken the influence of the interference; received array signals are then subjected to broadband compensation or multiple narrowband compensation, and accordingly errors caused by channel inconsistency are eliminated. The method and device are applicable to real-time channel parameter extraction and automatic compensation for circular antenna arrays and receiving channels operating in any frequency range under the complex electromagnetic environment.

Description

technical field [0001] The invention relates to the field of array signal processing, in particular to an antenna array calibration method and a device thereof in a complex electromagnetic environment. A complex electromagnetic environment refers to an environment where there are dense interference signals from the outside world. A circular antenna array means that the antennas are evenly arranged on the circumference. The invention extracts and compensates the inconsistency errors of the channel amplitude and phase of the circular antenna array under the complex electromagnetic environment. Background technique [0002] With the rapid development of communication theory and technology, array antennas play an increasingly important role in radio systems such as mobile communications, radio stations, radar systems, and navigation, and the performance of array signal processing will directly affect the entire communication system. system performance. Due to the inconsistenc...

AI Technical Summary

Problems solved by technology

But at the same time, precisely because of the inherent properties of the single-frequency signal, external interference pulses will affect the reception and discrimination of the auxiliary signal, which will affect the result of array calibration

The feature of the present invention is to solve the problem that the existing array calibration method does not consider external interference and can only calibrate within a narrow band, and can accurately obtain channel parameters (including channel amplitude inconsistency parameters and channel phase inconsistency parameters), and in broadband in-band compensation

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