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Method and system for removing interferences

A symbol and decoding technology, applied in the field of interference removal, can solve the problems of incomplete detection and removal of sudden interference, etc., and achieve the effect of good sudden interference, good detection and removal

Active Publication Date: 2007-08-29
XFUSION DIGITAL TECH CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0010] The present invention provides a method and system for removing interference to solve the problem that the prior art cannot completely detect and remove sudden interference

Method used

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  • Method and system for removing interferences
  • Method and system for removing interferences

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Embodiment Construction

[0057] The present invention provides a system for removing interference, which can be applied to but not limited to OFDM, and is used to better detect and remove sudden interference when there is noise and / or interference in the system. Referring to Fig. 1, it includes: a demodulator and a decoder connected to each other, and a second judging unit connected to the decoder; further comprising: a decoding iteration connected to the decoder A judging unit, a deinterleaver connected between the demodulator and the decoder, and an interleaver connected between the demodulator and the decoder.

[0058] The demodulator is configured to calculate a bit metric according to the received symbol sequence, add an erasure mark to a corresponding symbol according to the bit metric, and output the bit metric of the symbol carrying the erasure mark. The symbol sequence received by the demodulator comes from the channel output after front-end processing and the decoding result fed back by the ...

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Abstract

The invention is in use for solving issue that current technique is unable to detect and remove paroxysmal interference. The method includes steps: (1) after receiving sequence to be decoded, the receiving end calculates measuration of each bit in each symbol of the sequence, and based on the measuration to add erasing marker for corresponding symbol; (2) erasing symbols of carrying the erasing marker, calculating the measuration of each bit in the erased symbols, and decoding the measuration; (3) based on the decoded result to determine whether it is needed to stop decoding; if yes, switching to step (4); otherwise, after adding erasing marker for corresponding symbol further based on decoded result, switching to step (2); (4) outputting decoded result.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and system for removing interference. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) is proving to be a very promising technology and is the choice for many next generation communication systems. In OFDM, the available bandwidth is divided into a series of subcarriers that are orthogonal to each other in the frequency domain. High-speed signals can be transmitted in parallel at lower rates on multiple separated subcarriers. By establishing multiple low-speed subcarriers, the OFDM symbol period is extended, thereby reducing inter-symbol interference caused by multipath fading. [0003] Because communication resources are limited, multiple communication systems may use the same frequency band and transmission medium. Many OFDM-based communication systems, including wireless communication systems, digital audio broadcasting a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L27/26
Inventor 李涛翁凌凡张杰胡锦潻刘坚能缪伟豪萧文洪郑树坤穆乐思吕林军张建伟
Owner XFUSION DIGITAL TECH CO LTD
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