METHOD OF DETECTING AND RESTORING PACKAGES IN COMMUNICATION CHANNELS WITH INTERSYMBOL DISTORTIONS Russian patent published in 2025 - IPC H04L7/00 

FIELD: physics.

SUBSTANCE: invention relates to the field of registration and restoration of packages in communication channels with intersymbol distortions. First, the signals from the output of the demodulator are used to determine the phases of the fronts of the received binary packages. When determining the phases of the fronts, only transitions from the high level of transmission to the low level of transmission and vice versa are recorded, and transitions, the beginning or end of which lies between the high and low levels, are not recorded. Based on the last n phases of the fronts of the binary packages, a histogram of the distribution of these n phases of the fronts of the binary packages is plotted. Area under the distribution histogram is then calculated in a sliding window of length k of successive phases of transmission fronts. Values of the areas under the histogram are compared to each other and the position of the sliding window is selected, at which the maximum value of the area under the distribution histogram is achieved. Average value of the phases of the fronts of the sliding window is considered to be an estimate of the phase of the fronts of the undistorted binary packages. Value of the transmissions is restored depending on the number of high-level readings and the number of low-level readings. If the number of high-level samples is greater than the number of low-level samples, a decision is made on receiving a single transmission, and if the number of low-level samples is greater than or equal to the number of high-level samples, a decision is made on receiving a zero transmission. Length of the window of k successive phases of the fronts of the binary packages is selected depending on the value of the dispersion of the distribution of the phases of the fronts of the binary packages.

EFFECT: high accuracy and speed of recovering binary packages when transmitting digital signals.

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