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Method and device for decoding stair code

A decoding method and a technology of a decoding device, which are applied in the field of optical communication FEC, can solve problems such as large decoding delay, high implementation complexity, and poor decoding performance, and achieve the effects of reducing time delay, reducing implementation complexity, and improving decoding performance

Active Publication Date: 2019-01-18
ZTE CORP
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Problems solved by technology

[0003] The present invention provides a ladder code decoding method and a ladder code decoding device, which are used to solve the problems of high implementation complexity, high power consumption, large decoding delay and poor decoding performance of the hardware circuit used for FEC code decoding in the prior art

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  • Method and device for decoding stair code
  • Method and device for decoding stair code

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Embodiment Construction

[0025] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0026] figure 1 It is the flowchart of the step code decoding method in the method embodiment 1 of the present invention, as figure 1 The ladder code decoding method in the shown method embodiment 1 of the present invention includes:

[0027] Step 1, obtain the length L of the sliding window, and according to the order of the receiving time from front to back, among the received subcode blocks, continuously obtain L said subcode b...

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Abstract

The invention discloses a method and device for decoding a stair code, and the method comprises the steps: 1, obtaining the length of a sliding window, and continuously obtaining L subcode blocks as to-be-decoded subcode blocks in the sliding window according to the receiving time sequence from the front to the back, wherein L is a positive integer; 2, grouping the to-be-decoded subcode blocks fordecoding, updating the to-be-decoded subcode blocks according to a decoding result, obtaining updated subcode blocks, and outputting the former M new subcode blocks as the decoding result, wherein Mis less than L; 3, sliding the sliding window backwards by the length of M subcode blocks, recombining the remaining updated subcode blocks in the sliding window and the subcode blocks sliding into the sliding window as the to-be-decoded subcode blocks in the sliding window, and returning to step 2 till the coding result of all subcode blocks is outputted. The method reduces the implementation complexity of a hardware circuit, and reduces the time delay of decoding.

Description

technical field [0001] The present invention relates to the technical field of optical communication FEC, in particular to a ladder code decoding method and a ladder code decoding device. Background technique [0002] Forward Error Correction (Forward Error Correction, FEC) technology has been widely used in optical communication systems at present, so as to achieve the purpose of improving the bit error rate performance of the system and improving the reliability of system communication. Among them, ladder code is a new type of FEC code pattern, which combines the ideas of convolutional code and product code. The coding method of ladder code is similar to that of product code. There is a strong correlation, that is, any two adjacent ladder code sub-code blocks can be combined into a complete bch code block unit, so that the whole ladder code can be regarded as a chain structure with a length tending to infinity. In the ladder code decoding method, each time the decoding ou...

Claims

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Application Information

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IPC IPC(8): H03M13/29H03M13/27
CPCH03M13/27H03M13/2909H03M13/2939H03M13/29
Inventor 殷俊杰蔡轶王卫明孙二坤
Owner ZTE CORP
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