FIELD: radio engineering.
SUBSTANCE: used, for example, when operating as a narrow-band radio modem in licensed frequency bands. A software-defined radio system with the function of ensuring compatibility with narrow-band radio devices operating in licensed frequency bands consists of an antenna (2), a radio signal switch (1.1) or a duplexer (4), a digital processing and control unit (1.8), an analog radio bandpass filter (1.2), power amplifier analog bandpass filter (1.3), radio receiver (1.6.1), frequency reference oscillator (1.10), end device (3), control panel (1.9), radio transmitter (1.6.2), radio transmitter analog bandpass filter (1.5), power amplifier (1.4) and analog-digital unit (1.7).
EFFECT: expansion of the scope of means for the specified purpose by developing a software-defined radio system with the function of ensuring compatibility with existing radio devices and a method for its implementation, which is applicable to narrow-band radio systems and ensures compatibility with existing narrow-band radio modems.
3 cl, 3 dwg
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