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Method and apparatus for eliminating signal interference

A technology for eliminating signals and eliminating interference, applied in the field of digital signal transmission, can solve problems such as inability to resist strong single-frequency interference, and achieve the effect of saving resources, being easy to implement, and having a wide range of adaptability.

Active Publication Date: 2008-01-02
SHANGHAI HIGH DEFINITION DIGITAL TECH IND
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  • Abstract
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AI Technical Summary

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

Method used

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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] As shown in FIG. 1 , 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 detectio...

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Abstract

The invention provides a device of eliminating interference of signal, comprising an interference checker for converting signal into frequency domain to check interference of signal, and check the interference position at frequency domain, a frequency spectrum transfer device for transferring the interference position at frequency domain to zero frequency to transfer the frequency spectrum of signal at initial position to generate an upper transfer signal, a high-pass filter for filtering out the checked interference from the upper transfer signal to generate a filtered signal, and a frequency spectrum lower transfer device for transferring the frequency spectrum of the filtered signal back to initial position to generate a signal without interface. The invention can find and filter interference position, therefore, balancer can work at ideal condition, to improve system property, which can eliminate fixed interference and treat some additional unknown single-frequency interference, with wide application, low demand on hardware resource, and easy application. The invention also provides a method for eliminating interference.

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...

Claims

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Application Information

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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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