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    • 67. 发明公开
    • Adaptative error correcting code for data communications over a plastic optical fibre
    • 自动化设备技术支持
    • EP2498432A1
    • 2012-09-12
    • EP11002046.8
    • 2011-03-11
    • Knowledge Development for POF, S.L.
    • Pérez de Aranda Alonso, RubénPardo Vidal, Carlos
    • H04L1/00H03M13/00H04B10/12
    • H04L1/004H03M13/152H03M13/251H03M13/35
    • The present invention relates to an efficient coding and modulation system for transmission of digital data over plastic optical fibres. In particular, the digital signal is coded by means of a three-level coset coding. The spectral efficiency of the system is configurable by means of selecting the number of bits to be processed in each of the levels. The first level applies to the digital data a binary BCH coding and performs coset partitioning by means of constellation mapping and lattice transformations. Similarly, second level applies another binary BCH coding, which may be performed selectably in accordance with the desired configuration by two BCH codes with substantially the same coding rate, operating on codewords of different sizes. The third level is uncoded. Both the second and third level undergo mapping and lattice transformation. After an addition of the levels, a second-stage lattice transformation is performed so as to obtain a zero-mean constellation. The symbols output from such three-level coset coder are then further modulated.
    • 本发明涉及一种用于通过塑料光纤传输数字数据的有效的编码和调制系统。 特别地,数字信号通过三级陪集编码进行编码。 通过在每个级别中选择要处理的位数来配置系统的频谱效率。 第一级适用于数字数据二进制BCH编码,并通过星座映射和晶格变换进行陪集划分。 类似地,第二级应用另一个二进制BCH编码,其可以根据具有基本上相同编码速率的两个BCH码,按照不同大小的码字进行可选择地执行。 第三级未编码。 第二级和第三级都进行映射和晶格转换。 在添加电平之后,执行第二阶段晶格变换以获得零平均星座。 然后进一步调制从这种三级陪集编码器输出的符号。