Method for encoding digital data for transmission through an optical fiber of plastic, method for receiving and decoding a digital signal encoded by an encoder method, apparatus for receiving and decoding a digital signal encoded with a device and integrated circuit.

摘要

Summary the method for encoding digital data for transmission through an optical fiber of plastic, method for decoding a digital signal encoded by an encoder class side of three levels and received by means of a plastic optical fiber, apparatus for encoding data Digital for transmission through an optical fiber of plastic.Apparatus for decoding a digital signal encoded by an encoder class side of three levels and received through an optical fiber of plastic and integrated circuit, the present invention relates to an efficient coding and modulation system for the transmission of data dig Itais by optical fibers, plastic.In particular, the digital signal is coded by a coding class side of three levels. The spectral efficiency of the system is configurable through selection of the number of bits to be processed at each of the levels.The first level applies to digital data and performs a binary BCH coding partitioning class lateral by means of constellation mapping and transformation of reticle.Similarly, the second level applies another binary BCH coding, which may be selectively according to the configuration desired by the two codes of BCH with substantially the same rate of encoding, operating on code words of different sizes. The third level is not encoded.Both the second and the third level pass through mapping and processing of reticle. After the addition of levels, a transformation of reticulum of second stage is performed so as to obtain a constellation of zero average. The symbols from this encoder class side of three levels are then additionally modulated.