RU2280950C2 - Radio station - Google Patents

Abstract

FIELD: radio communications.

SUBSTANCE: proposed radio station that can be used in adaptive radio communication systems for organizing data exchange over variable-parameter duplex channels including organization of communications in computerized air-to-surface data exchange systems has newly introduced first and second analog-to-digital converters, message analyzing unit, frequency divider, digital modulator, fourth switching unit, differential circuit, variable-ratio frequency divider, message generator, third OR gate, random-access memory, switch, second decoder, coding device, message converter, and control bus connected to control instruction generator input. Novelty is also introduction of computerized processes for radio station placing in operation, radio communication channel quality estimation, and choice of mode of operation with distant station.

EFFECT: enlarged functional capabilities.

1 cl, 1 dwg

Description

The invention relates to radio communications, can be used in adaptive radio communications systems for organizing the exchange of information over duplex channels with varying parameters, including for organizing communications in automated data exchange systems in air-ground channels.

A known central station of a radio communication system with moving objects, comprising a receiver, demodulator and an address decoder unit connected in series, as well as a transmitter, a pulse generator, n timers, a system load counter, a priority setting unit, a priority message count counter, and a transmission enable signal shaper in series, transmission signal storage unit, data recording unit, data output unit, n AND elements, n pulse counters, n keys, control unit, n first, n second formed pulse generators, third, fourth pulse shapers, first, second, third, fourth OR elements, a storage unit, where n is the number of processed messages from moving objects [1].

The disadvantages of this radio station of the radio communication system include the limited capabilities in terms of the number of served radio channels with various types of modulation.

Closest to the claimed object is a radio station containing a receiver, a control command decoder, a first trigger, a first switch, a transmitter, a receiver frequency synthesizer, an operating frequency selection unit, a control command generator, a transmitter frequency synthesizer, a reception frequency memory unit, second and third switches, transmission frequency memory block, PFP receiver frequency tuning control block, PX transmitter frequency tuning control block, second trigger, first element And, third and fourth triggers, second ele I ment, pulse shapers, synchronizer, programmer, first, second and third input bus, third pulse shaper, first OR element, analysis time shaper, first counter, decoder, second OR element, clock generator, second counter, binary code converter , the third element OR [2].

The disadvantages of the prototype include:

- the type of input information is not analyzed, which in some practical cases determines the operating mode of the radio station;

- there is no scheme for assessing the quality of the radio channel;

- interaction with the second correspondent is possible only after applying the enable signal on one of the input buses associated with the radio channel quality assessment unit.

The main task, to which the claimed invention is directed, is to expand the functionality of the radio station by automating the commissioning processes, assessing the quality of the radio channel and selecting a mode of working with a remote correspondent.

The specified technical result is achieved by the fact that to the radio station containing the receiver, the first output of which is connected to the inputs of the third switch of the transmission frequency memory unit and the fourth trigger through the control command decoder, the second output is connected to the inputs of the control command generator and the second switch through the operating frequency selection block , the first input of the receiver is the third bus of the input high-frequency signals, the transmitter, the output of which is the high-frequency output of the radio station, the first synchronization output the torus is connected through the second pulse driver to the inputs of the third, fourth triggers and the second AND element, the second output of the synchronizer is connected to the programmer, the third output is to the inputs of the control units for adjusting the frequency of the receiver and transmitter, the output of the second OR element is connected through the first pulse former, the second trigger connected to the inputs of the receiving frequency memory block, the second and third switches and the transmission frequency memory block, the output of the receiver frequency adjustment control block through the last well-connected second switch, the receiver frequency synthesizer is connected to the first input of the receiver, the output of the analysis time generator via the first counter connected in series, the first decoder, the receiver frequency memory unit is connected to the second input of the receiver, the output of the transmitter frequency control control unit via the third switch, synthesizer connected in series the frequency of the transmitter is connected to the first input of the transmitter, the output of the first OR element is connected to the inputs of the operating frequency selection unit, the driver control commands and through the first trigger with the first switch, the first output of the programmer is connected to the third input of the transmitter through the memory block of the transmitter, the second output of the programmer is connected to the third input of the receiver through the memory block of the receiver, the output of the third pulse shaper is connected to the inputs of the first OR element, shaper the analysis time, the first counter, the output of the second AND element is connected to the input of the first OR element, the first output of the control command generator is connected to the second inputs of the first and of the fourth trigger, the output of the fourth trigger is connected to the first input of the first element And, the second input of which is connected to the output of the third trigger, the output of the first element And is connected to the second input of the second trigger, a clock generator, the first analog-to-digital converter (ADC), the second ADC are introduced , message analysis unit, frequency divider, digital modulator, fourth switch, differential circuit, variable divider frequency divider, message former, third OR element, random access memory a signaling device, a key, a second decoder, an encoding device, a message converter, the control bus of which is connected to the input of the control command generator, and the clock pulse generator is connected through the frequency divider to the inputs of the first ADC, message analysis unit, digital demodulator, and through the frequency divider with a variable division coefficient - to the inputs of the digital modulator and demodulator, the second decoder, the second ADC, random access memory and encoder, and the second output of the control command generator connected to the inputs of the first and fourth switches, random access memory and key, the third output - to the inputs of the encoder and the second decoder, shaper and message converter, the fourth output - to the inputs of the third switch and the first element And, the fifth output - to the inputs of the frequency divider with variable by the division factor, digital modulator and demodulator, the output of the receiving frequency memory unit is connected to the message analysis unit, the second output of the key through the random access memory is connected to the second input of the third OR element, the output of which through the first switch is connected to a digital modulator, the third output of the receiver is connected to the input of the first ADC, the first input signal bus is connected to the inputs “Set to zero” of the synchronizer, message analysis unit, control command generator, and also to the second input of the second OR element, the input of the message converter is the second input signal bus, the output of the message former is the digital output of the radio station, the input of the second ADC is connected to the output of the differential circuit, the input of which the swarm is connected to the output of the fourth switch, the input-output of the differential circuit is a low-frequency input-output of a radio station.

The drawing shows a structural diagram of the inventive radio station.

The radio station contains a receiver 1, a decoder 2 control commands, the first trigger 3, the first switch 4, the transmitter 5, the synthesizer 6 frequencies of the receiver, the unit 7 selects the operating frequencies, the shaper 8 of the control commands, the synthesizer 9 frequencies of the transmitter, the block 10 of the memory of the receiving frequencies, the second and the third switches 11 and 12, the transmission frequency memory unit 13, the receiver frequency adjustment control unit 14, the transmitter frequency adjustment control unit 15, the second trigger 16, the first element And 17, the third and fourth triggers 18 and 19, the second element And 20, the first and second form Pulse drivers 21 and 22, synchronizer 23, programmer 24, first, second and third input bus lines 25, 26, 27, third pulse shaper 28, first OR element 29, analysis time shaper 30, first counter 31, first decoder 32, second OR element 33, clock generator 34, first analog-to-digital converter 35, second ADC 36, message analysis unit 37, frequency divider 38, digital modulator 39, digital demodulator 40, fourth switch 41, differential circuit 42, variable frequency divider 43 division factor, form message finder 44, third OR element 45, random access memory 46, key 47, second decoder 48, encoder 49, message converter 50. The control bus 51 is connected to the input of the shaper 8 control commands.

The radio station operates as follows.

After turning on the radio at the initial time, it is set to receive mode at a previously known operating frequency. At the same time, it is synchronized by applying a control action on the first bus 25 for the initial installation of the driver 8 of the control commands, the synchronizer 23 and the message analysis unit 37 and through the second element OR 33 to the input of the first pulse driver 21. The signal of the bus 25 can be obtained, for example, from the voltage drop obtained when the radio is turned on. The generated pulse translates the trigger 16 in the logical state "1". Logical signal “1” from the output of trigger 16 is fed to the inputs of the second 11 and third 12 switches and switches the control of synthesizers 6 and 9 to blocks 14 and 15. At the same time, this signal is sent to blocks 10 and 13 and allows the switching of receiver 1 and transmitter 5 according to programs changing the fixed frequencies of the receiver 1 and transmitter 5 generated by the programmer 24. The synchronization of the formation of switching programs is provided by the synchronizer 23 by the signals from its outputs to blocks 14 and 15 and the programmer 24. Moreover, blocks 14 and 15 provide frequency tuning of synthesizers 6 and 9 in the passband of receiver 1 and transmitter 5 relative to the nominal frequencies. In the absence of a radio signal at the first of the assigned radio frequencies from the message analysis unit 37, an effect is transmitted to the third pulse shaper 28 to change the operating frequencies of the receiver and transmitter.

In the absence of a received radio signal, the frequencies of the receiver 1 and transmitter 5 are switched at certain intervals of time sufficient for tuning the radio, selecting a new operating frequency according to the algorithm of blocks 14 and 15. At each time interval specified by the synchronizer 23, after switching the frequencies of the receiver 1 and the transmitter 5 and the choice of the operating frequency according to the signal from the synchronizer 23, the driver 22 is launched, from the output of which the generated pulse is supplied to the triggers 18 and 19 and sets them in the logical “0”, which from the outputs of the triggers 18 and 19 enters the element And 17. Simultaneously, the pulse through the element And 20, the second input of which receives the logical “1” from the second trigger 16 through the first element OR 29, is fed to block 7, driver 8 for requesting frequency and to trigger 3, which switches the switch 4 to the state of information transmission through the digital modulator 39 to the transmitter 5. At the edge of this pulse, block 7 outputs the frequency value at which the corresponding radio signal is detected to switch 11 and driver 8, which upon the decline of the pulse, it generates a message that, through the switch 4 and the digital modulator 39, is fed to the input of the transmitter 5. After the message is transmitted according to the algorithm of operation of block 15, a signal is generated in the driver 8, which arrives at trigger 3 and sets it to its initial state, and trigger 19 to the logical state “1”. Similar operations are performed with the second correspondent.

The state of the ether is continuously analyzed in block 37 and the corresponding action is generated in the driver 8 of the control commands, switching the radio means synchronously to the fixed frequencies following the program. If a radio signal is received at the next frequency, then the decoders of the 2 correspondents select the corresponding messages that determine the installation of new modes of interacting radio stations, if they are part of the received radio signal. In the case of receiving a radio signal of a different format, block 37 analyzes the digital signal at the output of the first ADC 35. The number of quanta in amplitude and time discrete ADC 35 is selected from the processing condition of the received signals with the maximum dynamic range and data rate, respectively. The analysis can be carried out, for example, according to the following characteristics: type of modulation, waveform, preamble and other characteristics. A digital signal that carries information about the nominal frequency of the operating frequency, from the output of the decoder 2, goes to the third trigger 18 directly and after conducting sequential analysis operations in block 37, generating the corresponding control command in block 8, is sent to the first element And 17 and switch 12. When the signals match logical "1" or "0" from the triggers 18, 19 and from the shaper 8 of the control commands, the element And 17 generates a signal that arrives at the trigger 16 and puts it in the state "0". The logic signal "0" from the output of the trigger 16 is supplied to the switches 11 and 12, which switch the control of the synthesizer 6 of the receiver frequencies to block 7, and the synthesizer 9 of the transmitter frequencies to decoder 2 or shaper 8, after which the radio means of the correspondents are tuned to the corresponding operating frequencies, and the exchange of information coming through the switch 4 and the digital modulator 39 begins. The radio station can operate in the mode of exchange of digital and voice (analog) data. The switching of these modes is carried out after analysis of the output signals of the first ADC 35 in block 37, for example, according to the waveform or nominal of the operating frequency, from the block 10 of the receiving frequency memory. In block 37 of the analysis of messages to the received signal, the types of messages for the exchange of which the radio station is designed are matched. If the signal coincides with one of them, the corresponding action is issued to the digital demodulator 40 through the driver 8 of the control commands to perform the specified operations. If an analog signal is received, the corresponding control actions on the frequency divider 43 with a variable division ratio of pulses coming from the generator 34, a digital modulator 39 and a demodulator 40 are issued from the first output of the driver 8, from the second output to the fourth switch 41, random access memory 46, key 47, from the third output - to the fourth trigger 19 and through the first trigger 3 to the first switch 4. The four-wire lines for analog signals are converted into two-wire lines in differential th circuit 42, the input-output of which is the input-output of a radio station. In the case of receiving a digital signal from the shaper 8, the corresponding control action is sent to the above-mentioned nodes 41, 46, 47, and also from the fourth output to the second decoding device 48, the coding device 49, the shaper 44, and the message converter 50. Digital signals are fed to the input of the transducer 50 messages (bus 26), and are issued to the consumer from the output of the shaper 44 messages.

In the absence of a radio signal or a decrease in the reliability of the received information below a predetermined level from the message analysis unit 37, the corresponding command is sent to the third pulse shaper 28. From the shaper 28 of the pulse, the pulse through the OR element 29 is fed to the input of block 7 to request a new frequency, a message about which arrives at switch 11, and the receiver 1 is switched to the new frequency using blocks 11 and 6. The same pulse arrives at trigger 3 to control the switch 4 switch to the state of information transmission from the shaper 8 and to read the command code to the correspondent. The codogram through the switch 4 and the digital modulator 39 is transmitted to the transmitter 5 and transmitted to the correspondent. After transmitting the command to the correspondent (the end of reading the codogram), the signal from the output of the shaper 8 triggers 3 to its initial state, the switch 4 also switches to its original state, and a code coding of information from the terminal device is received at the input of the transmitter 5.

The command codogram received by the second correspondent from the output of the receiver 1 is fed to the input of the decoder 2, where the commands are allocated that come from the corresponding outputs of the decoder 2 to the switch 12 and the frequency memory unit 13, switching the transmitter 5 to a new frequency. The same message is sent to block 37 for analysis.

For the unit 37 to evaluate the presence (absence) of analog messages and the presence (absence) of digital messages, digital data is used from the outputs of the first and second ADCs 35 and 36 and from the outputs of the first message converter 50, respectively. With an analog speech signal, the magnitude of the amplitude in each sample changes over time, which is used in block 37 for analysis. The presence of digital messages at the output of the Converter 50 is determined in block 37, for example, by the waveform. The analog speech signal through the low-frequency input of the radio station and the differential circuit 42 is fed to the input of the second ADC 36. The received analog speech signal after conversion to the ADC 36 and demodulator 40, passing the fourth switch 41, is fed through the differential circuit 42 to the low-frequency output of the radio station. The storage of digital messages is carried out in RAM 46 with the corresponding position of the key 47 controlled from block 8. In the absence of analog signals from block 37 through block 8, the corresponding action is issued to RAM 46 and the data is read from RAM 46, which through the third element OR 45, the first switch 4, the digital modulator 39 are fed to the input of the transmitter 5. During the transmission of digital messages, the transmission of analog messages is blocked.

In most cases, the establishment of a mode of exchanging messages between correspondents is an event in a probabilistic sense, which is why the radio station has a mode of operation with alternate transmission of analog and digital messages. If analog messages are priority, as, for example, in air traffic control systems, then the message analysis unit 37 through the control command generator 8 provides switching of the switches 41 and 4 (via trigger 3) in such a way as to ensure the transmission of digital messages only in voice-free mode messaging time.

If there are a large number of correspondents in the radio communication zone, as, for example, happens in the aerodrome zone of large airports, the operation mode of the radio station can be defined as fixed by applying the corresponding signal via bus 51. In this case, a control command is issued from the shaper 8 to the message analysis unit 37 , setting the unit 37 in a predetermined mode of operation, in accordance with which the required control commands are issued from the driver 8. For example, when exchanging only voice messages, nodes 44, 45, 46, 47, 48, 49, 50 may be missing, and when exchanging digital messages, nodes 36, 42, respectively.

Blocks 1-24, 28-34 for the purpose and structure are the same with the prototype. They can be implemented on known serial elements and components. The introduced blocks 35-50 can be implemented on known microcircuits. The functions of blocks 3-20 and 23-50 can be performed programmatically using a computer.

The advantages of the claimed radio station include the following:

- according to the results of evaluating the input received signals, the required operating mode of the radio station is automatically established;

- assessment of the quality of the radio channel is carried out directly using the nodes of the radio station - if the quality of the radio channel is low, the radio station automatically switches to another operating frequency.

Information sources

1. A.C. No. 2050695, M. cl. H 04, 7/26, 1995.

2. AC No. 1798927, M.C. H 04 B 7/22, 1993 (prototype).

Claims (1)

A radio station containing a receiver, the first output of which is connected to the inputs of the third switch of the transmission frequency memory unit and the third trigger through the control command decoder, the second output is connected to the inputs of the control command generator and the second switch through the operating frequency selection unit, the first high-frequency input of the receiver is the third bus input high-frequency signals, the transmitter, the output of which is the high-frequency output of the radio station, the first output of the synchronizer is connected through the second form There are pulses to the inputs of the third, fourth flip-flops and the second AND element, the second output of the synchronizer is connected to the programmer, the third output is to the inputs of the control units for adjusting the frequency of the receiver and transmitter, the output of the second OR is connected through the first pulse shaper, the second trigger is connected to the inputs of the block the memory of the reception frequencies, the second and third switches and the memory block of the transmission frequencies, the output of the control unit for tuning the frequency of the receiver through the second switch connected in series p, the receiver frequency synthesizer is connected to the first input of the receiver, the output of the analysis time generator through the first counter connected in series, the first decoder, the receiver frequency memory unit is connected to the second receiver input, the output of the transmitter frequency control control unit via the third switch connected in series, the transmitter frequency synthesizer is connected to the first input of the transmitter, the output of the first OR element is connected to the inputs of the block of the selection of the operating frequencies of the reception, the shaper of control commands and through the first trigger with the first switch, the first output of the programmer is connected to the third input of the transmitter through the memory block of the transmission frequencies, the second output of the programmer is connected to the corresponding input of the memory block of the reception frequencies, the output of the third pulse shaper is connected to the inputs of the first OR element, the shaper of analysis time, the first counter, the output the second AND element is connected to the input of the first OR element, the first output of the control command generator is connected to the second inputs of the first and fourth triggers, the output of the fourth gega is connected to the first input of the first element And, the second input of which is connected to the output of the third trigger, the output of the first element And is connected to the second input of the second trigger, a clock generator, characterized in that the first analog-to-digital converter (ADC) is inserted into it, the second ADC, message analysis unit, frequency divider, digital modulator and demodulator, fourth switch, differential circuit, variable divider frequency divider, message former, third OR element, operational memory a transmitting device, a key, a second decoder, an encoding device, a message converter, the control bus of which is connected to the input of the control command generator, and the clock pulse generator is connected through the frequency divider to the inputs of the first ADC, message analysis unit, digital demodulator, and through the frequency divider with a variable division coefficient - to the inputs of a digital modulator and demodulator, a message analysis unit, a second decoder, a second ADC, random access memory and an encoder, and the second output is formed The control command generator is connected to the inputs of the third OR element of the fourth switch, random access memory and key, the third output is to the inputs of the encoder and the second decoder, message shaper and converter, the fourth output is to the inputs of the third switch and the first AND element, the fifth output is to the inputs a frequency divider with a variable division coefficient, a digital modulator and a demodulator, the output of the receiving frequency memory unit is connected to the message analysis unit, the second key output is via random access memory your is connected to the second input of the third OR element, the output of which is connected to a digital modulator through the first switch, the third output of the receiver is connected to the input of the first ADC, the first input signal bus is connected to the inputs “Zero setting” of the synchronizer, message analysis unit, control command generator, and also to the second input of the second OR element, the input of the message converter is the second input signal bus, the output of the message former is the digital output of the radio station, the information input is the transmitter via series connected digital modulator, a first switch, the second output of the ADC is connected to a differential circuit whose input is connected to the output of the fourth switch, the input-output circuit is a differential low frequency input-output station.