FIELD: radio engineering, communication.
SUBSTANCE: method for improvement of interference immunity of data transfer via a short-wave (SW) radio channel in a departmental communication system (DCS) consisting of N single-type RCN consists in frequency-time division of radio channels, with that, RCN in a transfer mode is connected to a transmitting antenna, the directivity pattern of which corresponds to conditions of radio wave propagation in azimuthal radio direction to RCN working in the reception mode. At RCN working in the reception mode there performed is spatial selection of the transmitted radio signal reflected from ionosphere with its antenna receiving complex (ARC), one of the chosen ones for reception of directivity patterns of which corresponds to conditions of radio wave propagation in azimuthal radio direction; after that, the received signal is subject to further filtration, demodulation and decoding with detection and correction of erroneously received binary symbols; with that, in order to perform adaptation of parameters of each RCN as per the applied working frequency, rate of information transfer, radiation power, as well as spatial orientation of ARC directivity pattern and directivity pattern of the transmitting antenna there performed depending on conditions of radio wave conditions at operation via each of N-1 azimuthal radio directions RCNi↔ RCNj.
EFFECT: improvement of immunity interference of data transfer via a short-wave radio channel between every two short-wave receiving-and-transmitting radio communication nodes RCNi and RCNj of the departmental communication system with different ordinal numbers without any increase of power of transmitting hardware available in each RCN, as well as improvement of conditions of electromagnetic compatibility of SW receiving and transmitting hardware of one of RCN, which is designated by the central one, without their spatial separation, and therefore, without any increase of surface area for deployment of central RCN.
2 cl, 2 dwg
