RADIO STATION FOR CONDUCTING COMMUNICATIONS ON A RAILROAD Russian patent published in 2008 - IPC H04B7/26 

FIELD: communication systems.

SUBSTANCE: radio station for conducting communications on a railroad contains input and transformation device, which consists of device for input/output of audio information, analog-digital and digital-analog converter, device for input/output of discrete information, control circuit which through linear interface is connected to interface of input and transformation device of control device. Control device contains remote control and wired channel adapters and service channel interface, which are connected to digital signal processor through a common bus. Interface of service channel is connected to loudspeaker through low frequency amplifier. One of the outputs of digital signal processor is connected to first receiving-transmitting device, which is connected to shortwave range antenna through antenna-matching device, another one of the outputs is connected to one of the inputs of digital signal processor of second receiving-transmitting device, which also contains digital-analog converter, transmitter, antenna switch, receiver, digital transformer and ultra-short wave range antenna. Introduced additionally into receiver of first receiving-transmitting device, which consists of elements of second receiving-transmitting device, is an adaptive suppressor of impulse interferences, which consists of broadband input filter and, connected serially, first high frequency switch, broadband limiter-amplifier, resonance contour, two-sided limiter of high frequency signal, attenuator and second high frequency switch.

EFFECT: creation of radio station which is meant for operation under conditions of increased noise and impulse interferences, both in the locomotive cabin and at the station.

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