A Method of Precise Extraction and Processing of Signals
A technology of precise extraction and processing methods, applied in the field of signal processing, can solve problems such as signal loss and poor signal extraction effects, and achieve the effects of reduced difficulty, easy implementation, and reduced processing difficulty
Active Publication Date: 2018-02-16
南京精益安防系统科技有限公司
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[0003] The purpose of the present invention is to provide an accurate signal extraction and processing method, which solves the problem of poor signal extraction effect and easy signal loss in the prior art
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[0037] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0038] The present invention is an accurate signal extraction and processing method. In the signal control, the previous method is to directly eliminate the interference signal. This is not only difficult to achieve accurately, but also has a serious impact on the target signal, resulting in the loss of important features of the target signal. , and then produce irreversible consequences for subsequent operations, and the key point of the present invention is to analyze the change of the signal first, and use the method of separating its rate of change to perform mathematical operations on it, focusing on describing the important characteristics of the signal, Through such a method, the interference signal is controlled within a certain range. When eliminating, the present invention performs digital operations with the low-pass filter several ...
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The invention discloses a method for accurately extracting and processing signals, which is specifically implemented according to the following steps: firstly, the input signal is differentially changed to obtain a first-order differential signal, and then the first-order differential signal is subtracted to obtain a mixed signal, and then the mixed signal is obtained The signal is Fourier transformed to obtain a low-frequency mixed signal, and at the same time, the interference signal stored in the memory is also Fourier transformed to obtain a low-frequency interference signal, and then the traditional low-frequency window function is subtracted from the low-frequency interference signal to filter out Window function with interference characteristics. Finally, the low-frequency mixed signal and the window function with interference characteristics are ANDed, and then filtered and inverse Fourier transformed to obtain the target signal. Finally, the target signal is filtered twice to remove the target signal. The contained burrs can obtain accurate target signals, and the present invention solves the problems in the prior art that the signal extraction effect is not good and the signals are easily lost.
Description
technical field [0001] The invention belongs to the technical field of signal processing, and in particular relates to an accurate signal extraction and processing method. Background technique [0002] With the continuous development of the field of electronic information, people's requirements for the quality of electronic information are constantly improving. In order to ensure accurate extraction of signals in more complex environments and ensure that important information will not be lost, people have also adopted different methods. How to remove the original signal? It is a thorny problem to meet the requirements of the interference signal. The signal transmission method is to superimpose the high-frequency target signal on the selected low-frequency carrier signal. When the signal is transmitted, it is some clutter signals that affect the accurate extraction and processing of the signal. , in the past cases, the general method for people to deal with signal extraction ...
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IPC IPC(8): G06K9/00
Inventor 李牧韩叔桓马新浩晁阳彭鹏郑兴纯马文文
Owner 南京精益安防系统科技有限公司