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Method for removing narrow-band interference and self-adapting filter

An adaptive filter and narrowband interference technology, applied in the field of signal processing, can solve problems such as poor real-time performance, achieve fast response speed, improve interference cancellation effect, and achieve simple effects

Active Publication Date: 2011-06-15
ZTE CORP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Embodiments of the present invention provide a method for removing narrowband interference and an adaptive filter to solve the problems in the prior art that removing interference through a fixed coefficient filter will introduce processing delay and poor real-time performance

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  • Method for removing narrow-band interference and self-adapting filter
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  • Method for removing narrow-band interference and self-adapting filter

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Embodiment Construction

[0022] According to the weight value corresponding to the current sampling moment and the reference signal sampled at the current sampling moment, the adaptive filter in the embodiment of the present invention determines the cancellation signal corresponding to the current sampling moment, and according to the determined cancellation signal corresponding to the current sampling moment, the The baseband signal sampled at the sampling time is filtered to obtain the baseband signal after the narrowband interference is removed. Since the embodiment of the present invention removes narrow-band interference through an adaptive filter, the processing delay is reduced and real-time performance is improved, and the adaptive filter can be used to adjust the weight in real time to meet the time-varying environmental requirements and improve the interference cancellation effect.

[0023] Wherein, the reference signal is generated according to the center frequency of the narrowband interfer...

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Abstract

The embodiment of the invention relates to the signal processing field, in particular to a method for removing narrow-band interference and a self-adapting filter, aiming to solve the problems of processing time delay and poor real-time for removal of interference by a fixity coefficient filter in the prior art. The method provided by the embodiment of the invention comprises the steps that: the self-adapting filter can determine a weight corresponding to the current sampling time, a cancellation signal corresponding to the current sampling time according to the determined weight and a reference signal sampled at the current sampling time, wherein the reference signal is generated based on a centre frequency of the narrow-band interference; then the self-adapting filter filters a band signal sampled at the current sampling time according to the determined cancellation signal corresponding to the current sampling time, and finally the band signal with narrow-band interference being removed is obtained. The embodiment of the invention can reduce the processing time delay, improve the real time, and perfect an interference cancellation effect.

Description

technical field [0001] The invention relates to the field of signal processing, in particular to a method for removing narrowband interference and an adaptive filter. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is a multi-carrier digital modulation technology and also a frequency multiplexing technology. Compared with other modulation techniques and multiplexing techniques, OFDM technology has efficient spectrum utilization efficiency and good anti-multipath interference ability, so it has been widely used in broadcast audio and video fields, as well as military and civilian communication systems. The main applications of OFDM technology include: High-speed Digital Subscriber Line (HDSL), Asymmetric Digital Subscriber Line (ADSL), ETSI (European Telecommunications Standards Institute, European Telecommunications Standards Institute) ) Standard Digital Audio Broadcasting (Digital Audio Broadcasting, DAB), Digital Video Broadcast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H03H21/00
CPCH03H21/0012
Inventor 王守义
Owner ZTE CORP
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