Method for changing the redundancy of sequential concatenated code built on the basis of external block code

To correct errors that occur in the transmitted data, noise-resistant codes are used. From the point of view of the ability to correct multiple errors, concatenated codes have high efficiency. A significant disadvantage of cascade coding is a significant increase in redundancy.

The purpose of the work is to propose a methodology for correcting the redundancy of sequential concatenated code, which would allow changing the correcting ability of the code depending on the state of the data transmission channel. The considered concatenated code is built on the basis of an external block code.

The publication proposes to regulate redundancy by encoding only a certain part of the bits from the output of the external code encoder with the internal code. The conducted research has shown the effectiveness of such a method, which made it possible to change the parameters of the concatenated code within a wide range.

The results obtained during the research can be used in the development and construction of various information transmission and processing systems. The software simulator developed for quantitative research can be used both for scientific and educational purposes.