2results about How to "High coding gain" patented technology

This application relates to an optical module, an optical access network system, and a method. The optical module includes: an optical receiving component for converting received optical signals into analog electrical signals; a clock and data recovery unit connected to the optical receiving component for extracting clock information and acquiring information bits; and a soft decision information generation and output unit, including a soft decision information generation unit connected to the optical receiving component and the clock and data recovery unit, which processes the original analog electrical signals to generate and output soft decision information. This application achieves the generation and output of soft decision information through the soft decision information generation unit within the optical module, supporting higher speeds, longer distances, or higher splitting ratios. It supports the application of high-performance SD-FEC at the system level in the access network system and eliminates the need for DSP to generate and process soft decision information.

The application discloses a communication method and system based on high-order LDPC long code, and the communication method based on high-order LDPC long code is applied to a communication system, the communication system comprises a sending end and a receiving end, and the communication method based on high-order LDPC long code comprises the following steps: constructing a high-order LDPC long code check matrix. Encoding is carried out based on the high-order LDPC long code check matrix, and a high-order LDPC long code is generated. The sending end sends the high-order LDPC long code to the receiving end. The receiving end receives the high-order LDPC long code. Decoding is carried out on the high-order LDPC long code, and a decision bit sequence is generated. Therefore, the communication method based on high-order LDPC long code improves coding gain, anti-deletion gain, and reduces the loss of soft information extraction when high-order modulation or space-time coding is cascaded.