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Narrow-band interference suppression method and device

A narrow-band interference and suppression device technology, applied in the direction of electrical components, transmission systems, etc., can solve the problem of being unable to track changes in phase and amplitude, and achieve the effect of reducing damage

Active Publication Date: 2010-10-13
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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Problems solved by technology

[0011] 3. It can only track the frequency of the narrowband interference signal, but cannot track the changes of its phase and amplitude

Method used

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  • Narrow-band interference suppression method and device

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Embodiment Construction

[0038] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described here, so the present invention is not limited by the specific embodiments disclosed below.

[0040] As mentioned in the background technology section, the narrowband interference suppression method in the prior art has many disadvantages:

[0041] 1. The fast Fourier transform used belongs to data block processing, its response speed is limited, and it is difficult to track the changes of narrowband interference in real time;

[0042] 2. It is often necessary to zero or filter the signal of the narrowband interference frequency, ...

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Abstract

The invention discloses a narrow-band interference suppression method and a narrow-band interference suppression device. The narrow-band interference suppression device comprises a frequency determining unit, a self-adaptive filtering unit, and an interference eliminating unit, wherein the frequency determining unit determines the frequency position of the narrow-band interference in a receiving signal, forms a local oscillator signal which only comprises narrow-band interference frequency information, and provides the local oscillator signal serving as a reference noise source for the self-adaptive filtering unit; the self-adaptive filtering unit converts the reference noise source into an analog interference signal which is consistent with the narrow-band interference, and provides the analog interference signal which is consistent with the narrow-band interference for the interference eliminating unit; and the interference eliminating unit eliminates the analog interference signal which is consistent with the narrow-band interference from the receiving signal, and outputs a useful signal. The narrow-band interference suppression method and the narrow-band interference suppression device perform point-to-point sampling processing on the data, and have high response speed. During eliminating the narrow-band interference, the damage to the useful signal at the same frequency position is reduced.

Description

technical field [0001] The present invention relates to the technical field of digital signal processing, and more specifically, the present invention relates to a narrowband interference suppression method and device. Background technique [0002] In a digital signal processing system, the processed data signal may be mixed with an additive interference signal due to various reasons, and the additive interference signal is accumulated on the useful signal, affecting the transmission and processing of the useful signal. Common additive interference signals include: white noise, impulse noise, narrowband interference, etc. [0003] As a kind of additive interference signal, the narrowband interference signal refers to the interference signal whose bandwidth is much smaller than the useful signal. The narrowband interference signal has serious harm to the information transmission and information processing of the digital signal processing system. For example, in a communicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04B1/10
Inventor 刘义臣
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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