A coding and modulation method and device supporting robust channel rc

Abstract

The embodiment of the present invention provides a coding and modulation method supporting a robust channel RC, comprising: forming a data frame with bit data carried by a DMT symbol at the interface of the PMD and the PMS-TC; The interface of PMS-TC determines the first part of bit data including the RC bit data in the data frame as non-coded bit data, and encodes the second part of bit data in the data frame to obtain coded bits Data; in the PMD, the non-coded bit data and the coded bit data are mapped to multiple subcarriers corresponding to the data frame for modulation to obtain modulated subcarriers, and the RC bit data is mapped to the at least one on the RC subcarrier. The invention also provides an encoding and modulating device supporting RC channel. By adopting the invention, the encoding and decoding rate of the data frame can be improved, and the security of information transmission can be guaranteed.

Description

technical field [0001] The present invention relates to the field of network technology, in particular to a coding and modulation method and device supporting robust channel RC. Background technique [0002] Communication systems generally have a management and maintenance channel. In some systems, the management and maintenance channel is embedded in the data channel, so the reliability of the management and maintenance channel is the same as that of the data channel. In order to improve the reliability of the management and maintenance channel, some systems specially adopt some methods to improve the reliability, such as taking out some subcarriers, increasing the SNR (Signal to Noise Ratio, signal-to-noise ratio) margin of these subcarriers, and using these The subcarriers form an independent channel, which is called RC (Robust Channel, robust channel), and these subcarriers are called RC subcarriers. Some communication systems can establish channels with different relia...

AI Technical Summary

Problems solved by technology

After obtaining the RC bit data from the RC channel and the bit data from the data channel to form a DMT data frame, if all the bit data of the DMT data frame are encoded, the encoding rate of the DMT data frame will be affected and the decoding throughput will be high. If Instead of coding, the bit data of the data frame is directly mapped to the service subcarrier, which will lead to the lack of coding protection and the security of information transmission cannot be guaranteed.

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