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RS (Reed-Solomon) decoding device and method for 10G Ethernet Passive Optical Network (EPON)

A decoding device and equation solving technology, applied in digital transmission systems, electrical components, error prevention, etc., can solve problems such as data rate inconsistency, circuit throughput not meeting requirements, etc.

Active Publication Date: 2012-07-04
北京格林伟迪科技股份有限公司 +1
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Problems solved by technology

As a result, the throughput rate of the above-mentioned pulsating structure circuit cannot meet the requirements. If the clock frequency is increased, it will not coordinate with the data rate, which will cause many problems.

Method used

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  • RS (Reed-Solomon) decoding device and method for 10G Ethernet Passive Optical Network (EPON)
  • RS (Reed-Solomon) decoding device and method for 10G Ethernet Passive Optical Network (EPON)
  • RS (Reed-Solomon) decoding device and method for 10G Ethernet Passive Optical Network (EPON)

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Embodiment Construction

[0114] When the traditional serial pulsation structure is used to implement the ME algorithm, the polynomials are sequentially moved into the decoding pipeline structure in a serial manner. For the RS (255, 223) code, there are 32 syndromes, so 32 clock cycles are required to be introduced into the pipeline. In 10GEPON, each FEC data block occupies 31 clock cycles, and the corresponding syndrome is updated every 31 clock cycles, so the serial pulsation structure cannot meet the throughput requirement. In addition, the serial mode also needs to increase parallel-to-serial and serial-to-parallel conversion circuits to increase circuit resources.

[0115] Aiming at the problems existing in the prior art, the present invention adopts a parallel calculation method, completes an iterative calculation in each clock cycle, and reuses a set of circuits for multiple iterative calculations, thus solving the problem of the introduction of pulsating structure syndromes, and does not requir...

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Abstract

The invention provides an RS (Reed-Solomon) decoding device for a 10G Ethernet passive optical network (EPON), which comprises a receiving buffer module, a corrector calculating module, a key equation solution module, a Chien search and error value calculating module, a delay buffer module and a sending buffer module. The invention also provides an RS decoding method for the 10G EPON. According to the invention, the coordination of RS decoding and the data rate can be realized and the multibyte parallel processing is realized.

Description

technical field [0001] The present invention relates to the technical field of Ethernet Passive Optical Network (EPON), in particular to an RS decoding device and method for 10G EPON. Background technique [0002] RS code, also known as Lisuo code, namely Reed-Solomon code, is a kind of forward error correction channel coding. The encoding process involves first redundanting the polynomial resulting from correcting the oversampled data at multiple points before transmitting or storing it. Sampling the polynomial beyond necessary values ​​makes the polynomial overdetermined (overqualified). When the receiver receives enough points correctly, it can recover the original polynomial, even if the received polynomial has many points distorted by noise. [0003] The 10G Ethernet Passive Optical Network (EPON) standard requires RS (255, 223) forward error correction coding on the line to improve the signal-to-noise ratio. RS decoding is mainly divided into syndrome calculation, k...

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Application Information

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IPC IPC(8): H04L1/00
Inventor 陈雪李西聪高卫东王磊聂克庆
Owner 北京格林伟迪科技股份有限公司
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