Rozenvasser D. Code methods for increasing the informational efficiency of fiber-optic transmission systems

The object of research is the processes of signal conversion in fiber-optic transmission systems. The subject of the research is code methods for increasing information efficiency in fiber-optic transmission systems. Research methods. Comparison of error-correcting codes, signal modulation methods, evaluation of the efficiency of transmission systems, linear codes and partially coded signals is carried out using the methods of the telecommunication theory, the theory of electrical circuits, theory of information and coding. In the study of FOTS error-correcting codes, the methods of simulation computer modeling were used. Theoretical and practical results. For the first time, the parameters of block error-correcting codes were determined at which the highest value of the rate of a fiber-optic transmission system with wavelength division multiplexing was achieved at the signal maximal power of the transmitter. A method for comparing the characteristics of FOTS with error-correcting coding, a method for estimation the energy efficiency of linear codes in FOTS with a limited optical channel bandwidth, a transmission system with partially coded signals by supplementing it with an error recorder and an error correction device has been improved, which made it possible to increase the information efficiency of FOTS.