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Method and device for five times of iterative decoding of superstrong forward error correction

An iterative decoding and forward error correction technology, which is applied in the direction of using linear codes for error correction/detection, using block codes for error correction/detection, cyclic codes, etc., can solve problems that are not specified in the protocol

Active Publication Date: 2014-02-05
FENGHUO COMM SCI & TECH CO LTD +1
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Problems solved by technology

A variety of SFEC algorithms are proposed in the ITU-T G.975.1 protocol, and its appendix I.7 proposes to use two BCH (Bose-Chaudhuri-Hocquenghem, Bose-Chaudhuri-Hocquenghem) codes for orthogonal The cascaded super-strong FEC code scheme, but how to implement the iterative decoding function with hardware circuits, the protocol does not specify

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  • Method and device for five times of iterative decoding of superstrong forward error correction
  • Method and device for five times of iterative decoding of superstrong forward error correction
  • Method and device for five times of iterative decoding of superstrong forward error correction

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Embodiment Construction

[0066] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0067] see figure 1 As shown, the embodiment of the present invention provides a method for five iterations of super forward error correction decoding, including the following steps:

[0068] A. According to the input OTU2 (Optical Transport Unit2, 2nd-order optical transmission unit) frame data, extract the synchronization word information of the corresponding position, and analyze it, and obtain the arrangement parameters of each code element of the row and column code words in the SFEC internal frame, see figure 2 As shown, each OTU2 frame has 32 bits for transmitting synchronization information; according to the arrangement parameters of each symbol of the row and column codewords in the SFEC internal frame, the data of the OTU2 frame structure is mapped to the data of the SFEC internal frame structure: the OTU2 frame Classify t...

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Abstract

The invention discloses a method and device for five times of iterative decoding of superstrong forward error correction, and relates to the field of channel error correction coding and decoding in an optical communication system. The device comprises a synchronization word analytical unit, an internal frame mapping unit, an RAM storage unit, a control unit for five times of iterative decoding, a BCH (900, 860) code syndrome computing unit, a BCH (900, 860) code BM algorithm unit, a BCH (900, 860) code data buffer unit, a BCH (900, 860) code forward search and error correction unit, a BCH (500, 491) code syndrome computing unit, a BCH (500, 491) code data buffer unit, a BCH (500, 491) code forward search and error correction unit, an internal frame inverse mapping unit and a decoding performance monitoring unit. Hardware implementation resources are small in scale, and the good coding gain error correction performance is acquired through five times of iterative decoding.

Description

technical field [0001] The invention relates to the field of channel error correction coding and decoding in an optical communication system, in particular to a method and device for super-strong forward error correction five iteration decoding. Background technique [0002] With the popularity and rapid development of the Internet, the demand for communication is also showing a trend of rapid growth. Due to the huge frequency band resources and excellent transmission performance of optical fiber, it is the most ideal transmission medium for high-speed and large-capacity transmission. With the continuous development of optical fiber transmission technology, optical fiber communication has occupied a dominant position in the field of transmission. However, in long-distance or ultra-long-distance, high-capacity DWDM (Dense Wavelength Division Multiplexing, Dense Wavelength Division Multiplexing) optical fiber communication systems, the dispersion of optical fibers, signal att...

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Application Information

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IPC IPC(8): H03M13/15
Inventor 董航朱齐雄胡烽
Owner FENGHUO COMM SCI & TECH CO LTD
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