Method and device for separating and extracting multiple signals

Abstract

The invention discloses a method and device for separating and extracting multiple signals, and relates to a method and device for direction finding, digital beam forming, signal separation, automatic identification and continuous demodulation of multiple signals in the field of communication reconnaissance. It consists of antenna array, antenna switch array, nine-channel receiver, post-processing module, multi-signal separation and demodulation module, power supply and other components. It uses the spatial spectrum estimation and direction-finding technology based on array signal processing to obtain the direction of arrival of electromagnetic signals, calculates weighted vectors and sets hardware devices through digital beamforming and blind beamforming methods, so as to detect multiple signals of the same frequency or different frequencies arriving at the same time. The signal is filtered in the spatial domain, and the separated multi-channel signals are automatically identified and continuously demodulated and output. It has the characteristics of high interference suppression, fast processing speed, low cost, convenient operation and maintenance, etc. It is especially suitable for multi-signal separation and extraction devices in communication countermeasures, intelligence reconnaissance, radio monitoring and other occasions.

Description

technical field [0001] The invention relates to a method and device for separating and extracting multiple same-frequency signals or different-frequency signals in the field of communication reconnaissance, especially suitable for communication countermeasures, intelligence reconnaissance, radio monitoring, radio and television signal monitoring and other occasions based on array signals A method and device for direction finding, separation, identification and demodulation of processing. Background technique [0002] In the field of communication reconnaissance, in order to conduct reconnaissance in a multi-signal environment, antenna arrays and subsequent processing technologies are generally used to form antenna beams with a certain direction, so as to suppress interference signals and enhance target signals. At present, most antenna beamforming techniques are beamforming methods based on the direction of arrival of the signal. It needs to estimate the direction of arrival...

AI Technical Summary

Problems solved by technology

At present, most antenna beamforming techniques are beamforming methods based on the direction of arrival of the signal. It needs to estimate the direction of arrival of the target radiation source or its corresponding array steering vector. It is very difficult. When the direction-finding error increases to a certain extent, the performance of beamforming will drop sharply, making it difficult to extract target signals. In addition, existing equipment generally only has the ability to extract single signals, which cannot meet the requirements of simultaneous detection and detection in complex electromagnetic environments. arrival signal request

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