RU212148U1 - RF data transmission module - Google Patents

Abstract

The utility model relates to multi-channel digital secure radio communication with high-speed mobile objects. The technical result of the utility model is to increase the radio communication range up to 6 times by increasing the output power of the modem up to 4 watts. The RF data transmission module for communication with high-speed mobile objects contains a receiver, a transmitter, a digital block for processing, controlling and generating signals, and a transmitted signal power amplifier up to 4 W. The input of the receiver and the output of the transmitter are connected through an antenna switch and a preselector to the transmit-receive antenna. The output of the receiver and the input of the transmitter are connected to the input and output of the digital block for processing, controlling and generating signals, respectively. The digital block for processing, controlling and generating signals is connected to external devices via a multiplex information exchange channel.

Description

Field of technology to which the utility model belongs

The field of technology to which the utility model relates is multi-channel digital secure radio communication with high-speed mobile objects.

The primary area of application of the utility model is radio communication between aircraft for various purposes, providing control of unmanned aerial vehicles, as well as for testing communication systems in the laboratory.

State of the art

The field of technology to which the utility model belongs is represented by a wide variety of patents, as well as commercially available radio modems.

Industrial products include radio modems such as the STANAG 4285 HF radio modem (RfDSP Company).

The STANAG 4285 HF radio modem is designed for wireless data transmission at speeds from 75 to 3600 bps in accordance with the STANAG 4285 standard. The modem operates in the frequency range from 3 to 30 MHz, uses 8-PSK phase shift keying with a symbol rate of 2400 baud and occupies the bandwidth 3 kHz at -30 dB level.

The closest analogues of the proposed utility model of the radio modem are the radio modems "Lora-1" and "Lora-1M" of the enterprise JSC "NPP "Radar mms".

Radio modems "Lora-1" and "Lora-1m" provide narrow-band transmission of telemetry and control information between the UAV and the ground control station.

Utility Model Disclosure

The utility model relates to multi-channel digital secure radio communication systems and can be used in control and communication loops with high-speed aircraft.

The closest of the known analogues is the Lora-1 radio modem (https://radar-mms.com/ (06/07/2021))

The radio modem "Lora-1" consists of a receiver and a transmitter operating in half-duplex mode to a common antenna connected to the microwave connector on the radio modem case, as well as a digital computing device for processing commands received via a radio channel and generating response signals.

The disadvantages of the analogue under consideration in relation to the proposed utility model include insufficient communication range, low information transfer rate over the radio channel, the absence of a multiplex information exchange channel, the lack of information about the effect of Doppler frequency shift on communication stability at a high speed of movement of the aircraft relative to the control point.

The task solved by the proposed utility model is to increase the radio communication range up to 6 times by increasing the output power of the modem up to 4 watts. To solve this problem proposed by the utility model, a power amplifier is introduced into the block diagram of the RF data transmission module.

Implementation of the utility model

The proposed radio frequency data transmission module operates in half-duplex mode, the reception and transmission of radio signals is carried out through an N-type connector located on the body of the radio frequency data transmission module. The RF data transmission module consists of a receiver, a transmitter and a digital unit that generates the transmitted signal and processes the received signal. The digitally generated modulating signal of the transmitter is fed through a digital-to-analog converter and a filter with a bandwidth of 3 MHz to a quadrature modulator, where it is transferred to the transmission frequency and output through the antenna switch to a common transceiver antenna.

From the N-type connector located on the body of the RF data transmission module, through the preselector and the antenna switch, the signal enters the receiver, consisting of a high-frequency frequency-selective amplifier and a quadrature demodulator with a filter with a bandwidth of 3 MHz. Next, the demodulated signal is fed to the analog-to-digital converter of the digital block for further processing and extraction of the information sequence.

The received information sequence from the digital block is transmitted through the multiplex information exchange channel to the corresponding blocks of the aircraft, in which the transmitted information sequence is also formed, and is issued via the multiplex information exchange channel to the digital block and, further, to the transmitter of the radio frequency data transmission module at a rate of 2 Mb/s

Claims (1)

RF data transmission module for communication with high-speed mobile objects, containing a receiver, the input of which is connected through an antenna switch and a preselector to a receiving-transmitting antenna, and the output - to the input of a digital block, a transmitter, the input of which is connected to the output of a digital block, and the output - to receiving-transmitting antenna through an antenna switch and a preselector, a digital block for processing, controlling and generating signals, connected respectively to the output of the receiver, and to the input of the transmitter, and to external devices via a multiplex information exchange channel, characterized in that a power amplifier of the transmitted signal is introduced into the circuit signal up to 4 watts.