A.M. Chudnov 1, S.B. Makarov 2, D.I. Kirik 3

1 Military Academy of Communications named after S.M. Budenny (Saint-Petersburg, Russia)

2 Peter the Great St. Petersburg Polytechnic University (Saint-Petersburg, Russia)

3 The Bonch-Bruevich Saint-Petersburg State University of Telecommunications (Saint-Petersburg, Russia)

1 chudnow@yandex.ru; 2 makarov@cee.spbstu.ru; 3 d_i_kirik@mail.ru

Improving the efficiency of data transmission using physical channels with non-stationary characteristics can be achieved by controlling the parameters of data transmission / reception and adapting the transmission algorithms to changing operating conditions of the system. It is proposed to control the parameters of the error-correcting code used in the mode of both detection and correction of errors, which may be of interest as an addition to the control of the signal energy in the physical channel or a separate method for controlling the parameters of the channel layer.

To evaluate the efficiency, the indicator of the marginal gain was used, which can be ensured by controlling the parameters of the redundant code, and a method was developed for its determination in the class of error probability distributions in a discrete channel with given constraints on its mean value and variance. The proposed technique is based on the correct reduction of the problem of finding extremal distributions in spaces with constraints on moments and its reduction to the problem of finite-dimensional optimization.

As examples of using the technique, the calculations of the limiting gain of the control algorithm for the multiplicity of the error corrected by the code were carried out for codes with different block lengths, as a result of which it was found that the gain in practical cases can be 10 ... 50%. In “bad” conditions, as shown, the gain can be “times” and “orders”, which indicates the ability of channels with controlled parameters to transmit emergency messages in certain situations, when a channel with uncontrolled parameters becomes inoperative.

Chudnov A.M., Makarov S.B., Kirik D.I. Estimation of the efficiency of control of the correcting ability of the code when transmitting messages over a non-stationary channel. Radiotekhnika. 2020. V. 84. № 12(24). P. 102−111. DOI: 10.18127/j00338486-202012(24)-10 (In Russian).

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