Noise immunity of signal demodulation procedure in binary coded communication channels with a frequency-position multiplexing

Abstract

The article presents the algorithms for demodulating binary channels of data transmission lines with frequency multiplexing used in remote control and warning systems. The noise immunity of the algorithms were investigated. It is shown that significant simplification and significant noise immunity increasing can be obtained by applying the majority decision rule.

Development of a filter amplifier of the signal pre-processing device for the passive listening mode of the hydroacoustic complex (НАС)

“…The transfer functions of the filter links can be approximated by Butterworth, Chebyshev, and Bessel polynomials of the 2nd order, which determine the shape of the amplitude-frequency characteristics (AFC), which are presented in Figure 2. Thus, a specific polynomial approximation is selected for the required filter parameters [3,8,9].…”