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Blind adaptive filtering device capable of eliminating narrowband interference and its application

An adaptive filter, narrow-band interference technology, applied in the direction of adaptive network, impedance network, electrical components, etc., can solve problems such as slow convergence speed, and achieve the effect of filtering narrow-band interference signals

Active Publication Date: 2011-12-14
MONTAGE SEMICON SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the convergence speed of these methods is very slow, and they can only deal with interfering signals with specific spectral shapes, which means that these methods cannot be widely used in more general scenarios, such as those with frequency hopping interference or the center frequency of the interfering signal changing rapidly. surroundings

Method used

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  • Blind adaptive filtering device capable of eliminating narrowband interference and its application
  • Blind adaptive filtering device capable of eliminating narrowband interference and its application
  • Blind adaptive filtering device capable of eliminating narrowband interference and its application

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Embodiment Construction

[0027] see image 3 , The blind adaptive filtering device capable of eliminating narrowband interference of the present invention may mainly include: an adaptive filter, a first delay unit, an error calculation unit, and the like.

[0028] The adaptive filter is used to filter the input signal x(n) to output y(n), which may be an FIR filter or an IIR filter. The internal structures of the FIR filter and the IIR filter are already known to those skilled in the art, so they will not be described in detail here; moreover, those skilled in the art can choose different adaptive filters according to different application occasions.

[0029] The first delay unit is coupled to the adaptive filter and configured to delay the output signal of the adaptive filter according to a preset first time extension. Generally, the first time extension can be determined according to an actual application scenario, for example, different time delays can be used when applied to a multi-subband situa...

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PUM

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Abstract

A blind self-adaptive filtering method, an apparatus and a broadband transmission system for eliminating narrowband interference are provided. The self-adaptive filtering apparatus includes: a self-adaptive filter, for filtering the current input signal and then outputting it, a first delay unit, for delaying the signal output from the self-adaptive filter with a first time delay length, and an error calculation unit, for implementing correlation operation on the signal output from the self-adaptive filter and the delay signal of the output signal to obtain error information. The self-adaptive filter adjusts the filter parameter according to the feedback error information to eliminate the interference in the latter input signal. As applying the output signal to implement correlation operation with the delay signal of the output signal, thus, the apparatus is used widely, for example, it can be applicable to broadband receiver, it also can be applicable to the case that there are a plurality of strong narrowband interferences, and it also can counteract a plurality of strong narrowband interferences whose swept rate is decades of milliseconds.

Description

technical field [0001] The present invention relates to a blind adaptive filtering device capable of eliminating narrowband interference, in particular to a device for adjusting adaptive filter parameters based on error information obtained after correlative processing of an output signal and a delayed signal of the output signal and its application. Background technique [0002] In broadband communication transmission systems, especially in wireless broadband communication transmission systems, narrowband interference signals such as analog or digital co-frequency or adjacent frequency interference will seriously affect the performance of transmission. Therefore, filtering has become one of the most basic and extremely important technologies in the field of electronic information processing. Using filtering technology, the required signal can be extracted from complex signals while suppressing noise or interference. In fact, the filter becomes a frequency-selective system,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H21/00
CPCH04B1/1036
Inventor 胡刚聂远飞吴美武
Owner MONTAGE SEMICON SHANGHAI CO LTD
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