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Decoding method and device

A decoding and decoder technology, applied in the field of decoding methods and devices, can solve the problems of increased input bit error rate and error diffusion of forward error correction modules

Active Publication Date: 2016-06-08
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the existing technology will cause error diffusion during the differential decoding process, resulting in a relative increase in the input bit error rate of the receiving end to the error correction module.

Method used

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Embodiment Construction

[0080] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0081] figure 1 It is a schematic diagram of the basic structure of the optical fiber communication system, such as figure 1 As shown, the system may include: a transmitter 1, a channel 2 and a receiver 3; wherein, the transmitter 1 may process the input signal to make the signal suitable for transmission in the channel 2, the channel 2 may ...

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Abstract

An embodiment of the present invention provides a decoding method and device, including obtaining a demodulated signal, and obtaining a first decoded signal, the first decoded signal is obtained after the i-th M-ary differential decoding process on the demodulated signal For the feedback signal, i is an integer greater than or equal to 0; according to the first decoding signal, the M-ary differential decoding process is performed on the demodulated signal to obtain the second decoding signal, and by adding the first input feedback to the decoder A decoding signal, so that the bit error rate of the output signal is reduced.

Description

technical field [0001] The embodiment of the present invention relates to communication technologies, and in particular to a decoding method and device. Background technique [0002] In recent years, optical communication has developed rapidly by virtue of its available frequency bandwidth, light weight, and immunity to electromagnetic interference. [0003] In a high-speed optical transmission system, the combination of multi-ary modulation technology and forward error correction coding is often used at the sending end to improve the transmission efficiency of the system and reduce the bit error rate of the system. However, the signal is processed at the receiving end. During coherent demodulation, the carrier recovered by the receiving end may have the same frequency and phase as the carrier of the received signal, or it may also have the same frequency and reverse phase. When the same frequency and phase reverse, the polarity of the demodulated data stream is opposite to ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/005H04L1/0055H04L27/233H04L27/3845H04L1/0058H04L1/0048H04L1/0054H04L27/106
Inventor 吴湛击肖治宇
Owner HUAWEI TECH CO LTD