标题: 应用于光通讯的受限选择软性RS 解码器
A Decision-Confined Soft Reed-Solomon Decoder for
作者: 许智翔
Hsu, Chih-Hsiang
李镇宜
Lee, Chen-Yi
电子研究所
关键字: 软性解码;soft decoding
公开日期: 2011
摘要: 在光通讯系统中,因为更加快速的传输速度而增加的讯号不稳定性,错误更正装
置需要提供更加有力的错误更正能力。相较于传统硬性RS解码器,软性解码器
可以提供更好的错误更正能力,但也需要高出许多的硬体复杂度。本論文提出了
一种受限选择软性演算法不但可以增加错误更正能力并且保有面积效益。创新的
重点在于,不是将许多可能的传输讯息解码再从中挑选出最有可能的一组,而是
将错误位置數学式Λ(x)设下限制导致只有解码其中一组。根据RS(255,239)的模拟
结果,在10−4 CER时可比硬性RS解码器多达0.4 dB传输效益。实验结果显示我们
提出的软性解码器在CMOS 90奈米制程下可达到2.56 Gb/s吞吐量并且只需花费
与硬性解码器相似的硬体复杂度。此软性解码器可以适用于利用16套解码器的
10-40 Gb/s光纤系统以及2.5 Gb/s GPON等应用。
Due to the increasing uncertainty of data for higher transmission rate, the Forward
Error Correction (FEC) devices need to provide more powerful error correcting
capability for optical communication systems. As compared with traditional hard RS
decoders, the soft RS decoders can perform substantial coding gain but require much
higher hardware complexity. In this thesis, a decision-confined algorithm is proposed
to enhance the error correcting performance with an area-efficient architecture.
The novelty is that, instead of decoding numerous possible transmitted codewords and
choosing the most likely one, only one candidate sequence will be decoded after
confining the degree of error-locator polynomial Λ(x). For RS (255,239) codes,
simulation results confirm that our approach provides 0.4 dB performance gain at 10−4
CER over the hard RS decoders. The experimental result reveals that our soft decoder
can achieve 2.56 Gb/s throughput in standard CMOS 90 nm technology while having
similar complexity as a hard decoder. It can fit well for 10-40 Gb/s with 16 RS
decoders in optical fiber systems and 2.5 Gb/s GPON applications.
URI: http://140.113.39.130/cdrfb3/record/nctu/#GT079811603
http://hdl.handle.net/11536/46769
显示于类别:Thesis


文件中的档案:

  1. 160301.pdf

If it is a zip file, please download the file and unzip it, then open index.html in a browser to view the full text content.