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Method and apparatus for eliminating signal interference

A technology for eliminating signals and signals, which is applied in the field of digital signal transmission, can solve problems such as being unable to resist strong single-frequency interference, and achieve the effect of saving resources, easy implementation, and low hardware resource requirements

Active Publication Date: 2009-11-18
SHANGHAI HIGH DEFINITION DIGITAL TECH IND
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  • Abstract
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Problems solved by technology

The above two methods are only limited to the situation of determining the frequency position of the known interference, in fact, they cannot fight against the strong single-frequency interference that changes at any time in the real channel

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  • Method and apparatus for eliminating signal interference
  • Method and apparatus for eliminating signal interference
  • Method and apparatus for eliminating signal interference

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Embodiment Construction

[0032] Below by taking the digital television terrestrial broadcasting system as an example in conjunction with the content of the present invention to provide the following embodiments, it includes a single carrier system (such as the ATSC system in the United States and my country's advanced digital television terrestrial broadcasting (ADTB-T) system), and a multi-carrier system (such as the DVB-T system in Europe and the digital multimedia broadcasting (DMB-T) system in China). Those skilled in the art can understand that the present invention can also be applied to other communication systems, such as wireless communication systems and general digital communication systems.

[0033] Such as figure 1 As shown, an overall block diagram of an interference cancellation device 100 is shown according to an embodiment of the present invention. It includes an interference detection device 120, an interference elimination device 140, and an AGC module 160, wherein the interference...

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Abstract

The invention provides a device for eliminating interference in a signal, comprising an interference detection device for detecting interference and a frequency domain position of the detected interference from the signal by transforming the signal into the frequency domain; a frequency spectrum shifting device, used to shift the frequency spectrum of the signal from its original position by shifting the frequency domain position of the interference to zero frequency to produce an upshifted signal; a high-pass filter to filter out detected interference from the upshifted signal to produce a filtered a signal; and spectral downshifting means for shifting the spectrum of the filtered signal back to its original location to produce an interference-canceled signal. It can locate interference and filter it out. This can make the equalizer work in an ideal environment, improve system performance, not only eliminate fixed interference, but also deal with some additional unknown single-frequency interference, wide adaptability, and low requirements on hardware resources, easy to implement. The invention also provides a corresponding interference elimination method.

Description

technical field [0001] The invention belongs to the field of digital signal transmission, in particular how to realize the anti-jamming technology in the communication system, especially in the digital TV terrestrial transmission system. Background technique [0002] 1. Digital TV terrestrial transmission system (including American, European and Japanese systems), [0003] Digital TV terrestrial broadcasting technology can be mainly divided into two categories: one is based on single-carrier technology, and its main representative is the Advanced Television Systems Committee (ATSC) system in the United States; the other is based on multi-carrier technology, and its main representative is European digital Video Broadcasting-Terrestrial (DVB-T) system and Japan's terrestrial Integrated Services Digital Broadcasting (ISDB-T) system. [0004] 2 Generation and transmission of analog TV signals [0005] Analog TV is frequency-division multiplexed with amplitude modulation with v...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/21
Inventor 梁伟强何大治周强管云峰张文军居峰
Owner SHANGHAI HIGH DEFINITION DIGITAL TECH IND
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