Interference signal processing method and device based on adaptive filter

An adaptive filter and jamming signal technology, applied in the field of signal processing, can solve the problems of low efficiency of jamming signals, the inability of jamming signal processing methods to meet the needs of high-speed real-time processing of observation data, and the inability of scientists to provide reliable pulsar observation data. Improve the signal-to-noise ratio and pulsar detection ability, meet the needs of high-speed real-time interference processing, and be beneficial to the realization of the hardware platform

CN112769414AActive Publication Date: 2021-05-07XINJIANG ASTRONOMICAL OBSERVATORY CHINESE ACADEMY OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-05-07

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Abstract

An interference signal processing method based on an adaptive filter comprises the following steps: acquiring an astronomical observation signal and an interference reference signal, and performing signal synchronization; carrying out delay processing on the astronomical observation signal; dividing an interference reference signal corresponding to an astronomical observation signal into two paths, and carrying out delay processing on one path of interference reference signal; inputting the other path of interference reference signal into the adaptive filter for digital filtering subtracting the interference reference signal after digital filtering from the astronomical observation signal after delay processing to obtain a corresponding output signal; inputting the output signal and the interference reference signal after delay processing into a lag correlator for cross-correlation operation; integrating the output signal; updating the filter coefficient according to the average value of the integrals; and repeating the steps for each sampling output of the observation signal to obtain all sampling data of the output signal. The interference processing performance of the observation system can be improved, the loss of the observation signal bandwidth is avoided, the complex radio frequency interference is effectively inhibited, and the signal quality and the recognition rate are improved.
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Description

technical field

[0001] The invention relates to the field of signal processing, in particular to an interference signal processing method and device based on an adaptive filter. Background technique

[0002] Due to the large receiving area and high antenna gain of the radio telescope, the sensitivity far exceeds that of ordinary communication equipment. Even if the radio telescope is built in a relatively remote area with relatively small radio interference, it will still be interfered by other signals, making the radio telescope While receiving useful astronomical information, it will also receive man-made radio frequency interference (Radio Frequency Interferences, RFI), such as TV signals, FM radio transmissions, global positioning system (GPS), mobile phones and aircraft navigation communications and other interference signals. These interference signals are the main factors affecting the sensitivity and data quality of astronomical observation equipment, which can lead ...

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Embodiment Construction

[0051] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present invention.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention.

[0053] refer to figure 1As shown, it is a data flow chart of interference signa...