RU2308175C2 - Central station of a system for radio communication with moveable objects - Google Patents

Abstract

FIELD: radio communications, possible use for setting up digital communication in automated data exchange systems in "air to surface" and "surface to surface" channels.

SUBSTANCE: central station of radio communication system additionally features equipment, which allows detection of radio-signal received from an aerial vessel, determining of its association with one of "air to surface" data transfer lines, transformation and redirection thereof to corresponding information consumer at received address, and also allows transfer of message from information consumer to any selected aerial vessel if it is within zone of service of central station of system for radio communication with moveable objects.

EFFECT: increased number of services aerial vessels with different onboard equipment for transferring data via "air to surface" channel due to constant tracking of presence and level of radio signals in channels, and due to usage of scanning procedures when radio signal is absent in corresponding channel by means of flexibly adjustable and wide-spectrum receivers and transmitters in channels of main and backup ground stations.

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Description

The invention relates to techniques for radio communications and can be used to organize digital communications in automated data exchange systems in the channels "air - ground" and "ground - ground".

A known radio communication system with moving objects, comprising a receiver, a demodulator, a message decoder, a buffer register of addresses of moving objects, a first AND element, a message priority decoder, a block of priority message timers, a block of priority message registers, a message distribution switchboard, a number counter moving objects, system load counter, free access clock generator, time window shaper, address clock clock generator millet, delay line, second AND element, free access key, data output unit as an information source, address interrogation key, buffer storage unit, number of overspeeds, reset pulse generator, data recording unit, modulator and transmitter, ground communication modem, location sensor , data format converter, control panel of the ground transceiver station [1].

The disadvantages of this system include the lack of the ability to perform the functions of a central radio communication station with mobile objects (software) in terms of monitoring the entire communication network and working with software equipped with a variety of on-board data transmission equipment (ADF).

Closest to the claimed object is the central station (CS) of a radio communication system with mobile objects - aircraft (AC), containing a series-connected receiver of the data line on the channel "air-ground" (LPD), a demodulator and a block of address decoders. These nodes receive and pre-process signals from the aircraft. For further processing, the following are used: a pulse generator, n timers, a system load counter, a priority setting unit, a priority number counter, connected in series, a transmission signal storage unit, a data recording unit, a data output unit, n AND elements, n pulse counters, n keys , control unit, n first, n second pulse shapers, third, fourth pulse shapers, first, second, third, fourth OR elements, where n is the number of processed messages from moving objects. The signal output of the address decoder unit is connected to the key inputs, the outputs of which through the fourth OR element are connected to the signal input of the control unit, the address decoder unit comparison inputs are connected to the priority setting input, pulse counter inputs and “Reset” inputs. The outputs of n delay lines through the corresponding timers are connected to the first inputs of the corresponding elements And, the outputs of which are connected to the delay inputs of the respective pulse counters. The outputs of the pulse counters through the corresponding second pulse shapers are connected to the inputs of the second OR element, the output of which is connected to the input "Reset" of the counter of moving objects. The input entry of the counter of movable objects is connected to the output of the first OR element, the input of which through the corresponding first pulse shaper is connected to the comparison output of the address decoder block. The output of the pulse generator is connected to the second inputs of n elements I. The output of the counter of movable objects is connected through the third OR element to the input of the system load counter, the output of which is connected to the control input of the priority setting unit and the second input of the control unit. The first output of the control unit through the third pulse shaper is connected to the second input of the third OR element, the third input of which is connected to the output of the fourth pulse shaper. The input of the fourth pulse shaper is connected to the output of the transmitter enable block. The outputs of the priority setting unit are connected to the control inputs of the first keys. A message processing unit (BOS) is connected to a group of m modems. The input of the reception blocking unit is the high-frequency input of the station, and the output is connected to the input of the receiver. The control input of the reception blocking unit is connected to the output of the “Transmission enable” signal conditioning unit. The first input / output of the biofeedback device through series-connected (m + 2) -th and (m + 1) -th modems and an address switching unit is connected to the output of the control unit. The output of the address switching unit is connected to the input of the transmission signal storage unit. m biofeedback outputs through m corresponding modems are low-frequency outputs of the station. The initial installation of priority setting and control units, a biofeedback clock generator, a system load counter is done by applying a “Reset” signal to the corresponding inputs. In BOS, the format conversion unit is connected by two-way communications with the (m + 2) -m modem, router, address base storage unit, charging unit, message storage unit, display unit, control panel. The clock generator is connected to the sync inputs of the format conversion unit, the router, the address base storage unit, the charging unit, the message storage unit, the display unit, and the control panel. The address base storage unit is connected by two-way communications with the router and the charging unit. Moreover, the m inputs / outputs of the router are connected to the corresponding m modems [2]. In the transmitter, radio signals are generated on the aircraft using the data of the transmitter for activating the transmission. The operations carried out in the prototype for demodulation, address decoding, setting priorities, signal delay, counting, generating, logical processing, switching and generating pulses, counting the number of moving objects, priority messages and loading the system, address switching, storing the transmission signal and addresses are functions performed by the known channel signal processing unit (BOX) - (ground processor) [3, 4].

The disadvantages of the prototype include:

- the prototype is designed to work with only one type of data line through the air-ground channel, since it has only one receiver and transmitter. Therefore, the station can only serve part of the aircraft located in the control zone;

- signal processing operations: demodulation and further processing, modulation and pre-processing for each of the LPDs, for example, VDL modes 1, 2, 3, 4 and ACARS, different due to differences in the shape of the signal, its transmission speed, type of encoding and scrambling etc. [8]. The hardware implementation of the nodes performing the specified functions of the BOX is impractical, as this will lead to a significant deterioration in the technical and operational characteristics of the station;

- signal processing operations are performed on known discrete elements: AND, OR, NOT, shift registers, RAM and others. However, for the software implementation of these operations in n channels, less hardware and energy costs are required (cost savings);

- the transmitter input and the receiver output of the LPD can be in the video frequency, for example, for ACARS system signals, or at an intermediate frequency, for example, for VDL-2 and VDL-3 mode signals [5]. These signals have different spectra, require a different frequency band for the efficient reception of messages. Therefore, it is almost impossible to process such information in analog form in one device.

The main task to which the claimed invention is directed is to increase the number of serviced aircraft with different on-board equipment of the air-to-ground data transmission line due to the constant monitoring of the presence and level of radio signals in the channels, the use of scanning procedures (in the absence of a radio signal in corresponding channel) in flexible and wide-band receivers and channel transmitters of the main and reserve ground stations.

The specified technical result is achieved by the fact that the central station of the radio communication system with moving objects, containing a receiver, a message processing unit (BOC), a transmitter, a group of 2 m modems, (2m + 1) -th and (2m + 2) -th modems , the channel signal processing unit (BOX), the reception blocking block, the output of which is connected to the input of the receiver, the first input / output of the biofeedback is connected in series through the (2m + 2) -th with (2m + 1) -m modem, 2m input / output of the biofeedback through 2m of the corresponding modems are the low-frequency inputs / outputs of the stations, the initial installation of the generator A clock pulse and a block for converting formats into a biofeedback are performed by sending a “Reset” signal to the corresponding inputs, m is the total number of paired ground stations in the zone, in a biofeedback a block for converting formats is connected by two-way communications with a router, an address base storage unit, a charging unit, the first the message storage unit, the first display unit, the first control panel, the clock generator is connected to the clock inputs of the format conversion unit, router, address storage unit call, tariffication unit, first message storage unit, first display unit, first control panel, address base storage unit is connected by two-way connections to the router and the tariffing unit, 2m inputs / outputs of router 11 are connected to the corresponding inputs / outputs of 2m modems, a similar main reserve ground station, and the backup ground station is connected by two-way communications to the BFB via the (2m + 3) -th modem; the computers connected to the main and backup ground stations are connected by two-way and communications with the corresponding inputs / outputs of the BOX, the inputs / outputs of the computers of the ground stations through the corresponding modems are connected to the inputs of the router, the (2m + 1) -th modem, the second control panel, the second display unit, the second message storage unit, a similar computer located in the reserve ground station, and through the series-connected (2m + 1) -th and (2m + 2) -th modems with the BOS, the control bus of the computer with two-way communications is connected to the corresponding inputs / outputs of the receiver, transmitter, block reception, first and second digital filters, analog-to-digital converter, digital-to-analog converter, BOX output through a series-connected digital-to-analog converter, second digital filter, transmitter, high-frequency isolation is connected to the antenna, which in turn is connected through a high-frequency isolation in series, reception blocking reception , receiver, analog-to-digital converter, the first digital filter is connected to the BOX input, the input / output of the format conversion unit is an input om / output station for the information of consumers.

The drawing shows a structural diagram of a central station of a radio communication system with moving objects and designations are introduced:

1 - receiver;

2 - message processing unit (BOS);

3 - transmitter;

4 - a group of 2 m modems;

5 - (2m + 1) -th modem;

6 - (2m + 2) -th modem;

7 - block blocking reception;

8 - entry / exit to m ground stations;

9 - channel signal processing unit;

10 - block format conversion;

11 - router;

12 - block storage address base;

13 - charging unit;

14 is a first message storage unit;

15 is a first display unit;

16 - the first control panel;

17 - a clock generator;

18 - main ground station;

19 - backup ground station;

20 - (2m + 3) -th modem;

21 - a computer;

22 - M channel blocks;

23 - 2nd control panel;

24 - 2nd display unit;

25 - 2nd block of message storage;

26 - bus control computer;

27 - 1st digital filter;

28 - 2nd digital filter;

29 - analog-to-digital Converter;

30 - digital-to-analog converter;

31 - high-frequency isolation;

32 - antenna;

33 - inputs / outputs of the station for consumers of information.

The central station of the radio communication system with mobile objects, which include aircraft, operates as follows. In each ground station 18 (19) there are M channel blocks 22. The number of channels M in ground stations 18 and 19 is determined by the need to simultaneously work with the aircraft in different modes and the traffic intensity in this service area. Formed on the BC messages sequentially in time through a series-connected antenna 32, a high-frequency isolation 31, a reception blocking unit 7 are received at the receiver 1, then converted into digital signals in the ADC 29, filtered in the first digital filter 27 to suppress spurious components in the spectrum of the received signal and in the form of a sequence of pulses served in BOX 9 for processing. When controlled from the calculator 21 via the control bus 26, the lock of the receiver 1 can be enabled, for example, during simplex data exchange in the channel or disabled if the receiver is used in the mode of assessing the integrity of the transmitted message (VDB, VDL-4 modes). The receiver 1 of the ground station 18 (19) provides signal reception in the air-to-ground data transmission lines. Demodulation, decoding, signal quality assessment and transmission of received messages to BOS 2 is carried out using the following nodes: ADC 29, the first digital 27 filter, BOX 9 controlled by the calculator 21. Such procedures are carried out continuously in the presence of a radio signal in the channel. To improve the quality of the assessment of the type of message, the number of discrete samples is set, for example, of the order of 8 for the duration of the shortest symbol of all channels. In the ADC 29, the signal amplitude is measured during these samples. The measurement result is sent via the control bus 26 to the calculator 21 for analysis. Using the nodes: ADC 29, the first digital filter 27, BOX 9 controlled by the calculator 21, in accordance with the necessary procedures for this LPD, the signal from the output of the receiver 1 is converted to digital form, which is necessary for further processing in the BOX 9 and then in the calculator 21 All logical operations are performed programmatically in the calculator 21.

Then the digital sequence is processed in the BOX 9 using control signals from the calculator 21. According to characteristic features, for example, by the pulse repetition rate in the received message, the type of aircraft airborne equipment is determined and a command is issued to prepare for receiving the corresponding data. Next, in the BOX 9, a strobe is formed, during which counting pulses begin to arrive to process the received messages. When the incoming address in the message from the aircraft matches the address stored in the second message storage unit 25, the number of movable objects recorded earlier increases by one. Then, in BOX 9, counting pulses are formed in the strobe, during which the received messages must be processed. In the presence of a radio signal in the channel, the priority of the message is determined, which is necessary, for example, to change the operating modes of the BOX 9 and the calculator 21.

If the message is not received or received with an error during time τ (for each type of LPD), i.e. If the mobile object did not get in touch or left the stable radio communication zone, then the previously obtained number of moving objects decreases by one. If a radio signal is again detected in the channel during time τ, then the above procedure is repeated. If the addresses do not coincide with the specified dispatchers from the control panels 16 and 23 embedded in the message storage units 14 and 25 or when messages from several aircraft are superimposed, further signal processing in BOX 9 is not performed.

In the calculator 21 is constantly determined by the degree of system load by estimating the number of processed messages for a given time interval. If there is no download, then a command is formed about the transition of the receiver 1 to the frequency scanning mode of operation. Data on the number of received messages is displayed on the screen of the data display unit 24 and, if necessary, can be displayed on the screen of the first data display unit 15 in the message processing unit 2. To coordinate the operation of all nodes of the ground station 18 (19), the control bus 26 of the calculator 21 is used, which is connected by two-way communications to the respective inputs / outputs of the receiver 1, transmitter 3, reception blocking unit 7, first and second digital filters 27 and 28, analog-digital converter 29, digital-to-analog converter 30. All operations are performed using calculator 21, implemented, for example, on a PC. The “Reset” command in the ground station 18 (19) is supplied programmatically to the BOX 9 from the calculator 21, and to the BOS 2 - to the clock pulse generator 17 and the format conversion unit 10 only at the beginning of work for setting the corresponding blocks to “Zero”.

Modulation and demodulation operations are performed in the channel signal processing unit 9 using control signals from the calculator 21. After processing in the BOX 9, the type of messages from the aircraft is analyzed in the calculator 21. The type of message carries information about its purpose, for example, for aircraft: alarms, messages of automatic dependent surveillance, data exchange "pilot - dispatcher". In general, there can be several types of messages that are prioritized.

In the ground station 18 (19), the formation of radio signals for transmitting messages on the channel "air - ground" is carried out in the following order:

- receiving a standard message from the calculator 21;

- formatting, coding, conversion (scrambling) of message bits in BOX 9;

- modulation and filtering of signals, their transmission to the input of the transmitter 3.

After identification of the received messages in the channel signal processing unit 9, controlled by the calculator 21, commands are generated for switching on the required frequency of the transmitter 3 and messages that are necessary to indicate the type (number) of the central station of the radio communication system with moving objects, for example, squatter packages for civil aircraft aviation. When a message of the highest priority is received from BOS 2 through modems 6 and 5 to the computer 21, it is installed first for transmission to the aircraft.

Until priority messages are transmitted, the passage of less priority messages is prohibited. Less urgent messages are transmitted to the aircraft sequentially in time in order of priority.

In the second block 25 of message storage using the second control panel 23 and the calculator 21 are pre-entered frequency ratings, type of modulation, transmission speed and other parameters specific to each channel and the region where the ground stations 18 and 19 are located. Databases on aircraft, parameters signals in radio channels and other data are stored in the first and second message storage units 14 and 25, into which additional information can be entered using the control panels 16, 23 and the calculator 21. Information is updated by Continuous messaging between the calculator 21 and the first message storage unit 14 via modems 5, 6, 20 and the router 11.

From the output of the calculator 21 messages through the (2m + 1) -th and (2m + 2) -th 5 and 6 modems arrive in BOS 2 through the router 11 to the block 10 format conversion. If the distance between the calculator 21 and the BOC 2 does not exceed the values specified in the requirements for the interface used, then modems 5 and 6 may be absent. In block 10 converting formats, the received messages are converted to the format necessary for the operation of all nodes of the biofeedback station 2. At the same time, the message addresses are compared with the data of the address base storage unit 12. According to the results of the comparison, a decision is made on the message schedule set by the router 11, the amount of payment for services in the charging unit 13, recording the message in the first message storage unit 14, indicating it on the first display unit 15. Thus, an automatic search for aircraft is provided to deliver messages to him and receive receipts about their delivery. In the first block 14 of the storage of messages provides maintaining archives of messages taking into account the category of urgency. For this, operational (for the period of "aging" of information) and long-term memory is used, for example, for 30 days. RAM data is constantly updated. Long-term memory data is needed to analyze conflict situations and evaluate the accuracy of calculations with information recipients. The accounting of message schedules and subscriber connections, the calculation of the amount for payment for services is carried out in block 13 tariffication depending on the address and message volume. The recipient of the information is billed for the transmitted message volume at a specified time interval, for example, a day, according to the traffic determined by the address base storage unit 12 and the router 11. The address base storage unit 12 contains the addresses and types of all messages processed in the central station, as well as the addresses serviced aircraft, interfaced peripheral stations of a radio communication system with mobile objects, and information recipients. Router 11 provides routing of messages over the air and ground communication networks, namely, connecting to the central station through appropriate modems 4 via buses 8 of ground stations 18 (19) of the radio communication system with moving objects and information recipients, for example, for civil aviation GA: airline services and air traffic control. Synchronization of all message processing processes in time in BOS 2 is carried out using a clock generator 17. Data is requested from the aircraft using the first control panel 16 of the BOS 2 or from the second control panel 23 of the ground station 18 (19). Information is requested from the aircraft by the consumer of information by means of a message in one of the standard formats, for example, in accordance with the X.25 protocol transmitted through the corresponding modem 4, router 11, format conversion unit 10, connected in series (2m + 2) and 2m + 1) th modems 6 and 5 to the ground station 18 (19). At the ground station 18 (19), using the nodes: BOX 9, controlled by the calculator 21, the DAC 30, the second digital filter 28, in accordance with the necessary procedures for this LPD, a signal is generated for the transmitter 3 with a low level of the side lobes of the spectrum due to filtering. The amplified radio signal from the output of the transmitter 3 through the high-frequency isolation 31, which protects the input circuits of the receiver 1 from the powerful radio signals of the transmitter 3, is fed to the antenna 32 and is transmitted to the aircraft via ether. The last operation is carried out, for example, when requesting data from aircraft on the basis of "last connection". The second control panel 23 performs the function of generating messages transmitted to the aircraft, to information consumers and to neighboring ground stations. With the automatic use of the ground station 18 (19) without maintenance personnel, blocks 23, 24, 25 may be absent.

In the calculator 21, the formation, address switching and distribution of messages circulating between the nodes of the ground station 18 (19) at the address (type) of the message is carried out. Messages from the aircraft and receipts about their correct reception are received on the first and second message storage units 14 and 25, and messages for the aircraft - to the channel signal processing unit 9. Similar operations to the above can be carried out in m other ground stations of the radio communication system with mobile objects. Monitoring of the current state of the communication network is carried out in block 10 format conversion on receipts received from 2m of the corresponding modems 4 in the form of a confirmation message received from the central station. The structure of the received receipt is compared with one of the addresses stored in the address base storage unit 12, and after the compliance analysis, a decision is made on the operability of the remote object. The central station of a radio communication system with mobile objects integrates remote mating ground stations of a radio communication system with mobile objects and information recipients into a single network and ensures the delivery of messages from aircraft to destinations, including, for example, civil aviation services, automated workstations of air traffic controllers and airline computers. The incoming data from the aircraft through one of the N channel blocks 22 of the ground station 18 (19), calculator 21, modems 5 and 6, BOS 2 are automatically transmitted to the addressees, which can be, for example, air traffic control centers, airlines, various GA services and other objects. Data traffic interacting with the aircraft CA, the status of remote ground stations and modems with communication channels are displayed on the first block 15 in real time. The graphical interface provides detailed information, and also gives the operator the opportunity to start testing a remote recipient of information, perform the necessary operations to install or disable a modem with a communication channel, and display statistics. The first block 14 storing messages has drives for storing data, with the possibility of redundancy, and also provides printing of data on an external printer. The format conversion unit 10 acts as an information-logical interface device for the outputs of the computer 21 of the diversity ground stations via modems 4, 6 and 5, the router 11 with the inputs / outputs 33 of the station for information consumers. The logic level protocol for each interface - input / output 33 stations for consumers of information is developed in accordance with the structure of the transmitted information. Each packet of these protocols contains a checksum, if it does not match, the packet is ignored.

With heavy traffic in the aircraft service area with a variety of on-board ADF with full use of the equipment of the main channel, if necessary, you can use the channel from the reserve ground station 19 to operate at a reception frequency that is not used in the main ground station 18.

If there are no radio signals in the channel at the main and standby frequencies, the computer, using the control bus 26, scans the frequency of the receiver 1 for other known fixed operating frequencies of the air-ground data transmission channels to determine the presence of information in them. Each of the exchange channels is connected for the time necessary to analyze the message in it. The ground station 18 (19) scans the channels on which aircraft transmit messages on the air. In receiver 1, the radiation search algorithm is used as one of the methods for determining the state of the channel (free or busy). To detect a radio signal, the receiver estimates the lower noise threshold based on the measurement of the signal power in the channel, regardless of the detection of the desired training sequence. The presence of a signal in the channel is characterized by the value of the power recorded in the channel, exceeding the estimate of the lower noise threshold. To detect busy channels at the physical level, for example, the following procedures can be used:

- Learning sequence detection: a channel is considered busy if a learning sequence is detected, followed by a flag - data frame label;

- channel power measurement: regardless of the ability of the ground station 18 (19) to detect a significant training sequence, the channel is considered busy after increasing the channel power to four times the lower noise threshold for half the channel estimation time interval.

Station 18 (19) uses the following methods to determine the transition of the channel state from busy to idle:

- measurement of transmission duration: after the learning sequence is detected, the channel busy state for each type of LPD of a certain duration. Subsequently, it is considered released according to the results of power measurements on the channel;

- channel power measurement: a channel is considered free if the channel power drops below twice the lower noise threshold for half the channel estimation time interval.

The frequencies of the M receivers during scanning change synchronously at operating points well-known for a given region, for example, with a shift (N-M) of positions, where N is the number of possible (in the service area) LPD modes. When a radio signal is detected, scanning stops and reception and processing of the message begins. In some cases, the channel unit 22 may be permanently assigned to a specific LPD, in which there is a continuous data exchange between subscribers of the central station. In the service area with a high intensity of aircraft flights, a specific channel unit 22 can be permanently fixed to each LPD.

Using the nodes of the ground station 18 (19) in the simplex mode, the following physical layer functions are provided:

- frequency control of the transmitter and receiver;

- receiving data by the receiver;

- data transmission by the transmitter;

- notification services, including measurement of reception time;

- listening to the channel.

Improving operational reliability in the CA is as follows. If the calculator 21 receives a notification from BOX 9 that a message has been sent to the aircraft at the current time, but it has not been received by the aircraft and this situation continues for a long time, then the calculator 21 decides on the failure of the corresponding element and, using the two-way The communication between the calculators 21 of the ground stations 18 and 19 initiates the transition to the backup ground station 19 with the issuance of information about the malfunction. To ensure uninterrupted operation, ground stations 18 and 19 are reserved by the principle of hot standby. Failure of one element of the station does not violate its performance.

Blocks 1-17 in purpose and structure are the same with the prototype. They can be implemented on known serial elements and components. The entered blocks 18-32 can be implemented on known microcircuits and serial equipment. The functions of blocks 9-14, 17, 25, 27, 28 can be performed programmatically using a computer. The construction of flexible and wide-range receivers and transmitters is known, for example, the M3TR radio station (M3-multiband, multimode, multifunction) from Rohde & Schwarz with a change in operating mode by downloading the appropriate software [6, 7].

The advantages of the claimed device include:

- an increase in the number of serviced aircraft with different on-board equipment of the data transmission line via the air-ground channel;

- the use of scanning procedures in receivers to search for a radio signal at the corresponding operating frequencies;

- increase in operational reliability due to automatic switching by software of ground stations to the reserve in case of equipment failures.

Thus, the proposed central station of a radio communication system with moving objects will allow for the exchange of messages between aircraft equipped with various equipment of data lines of the air-ground channel through the use of continuous monitoring of the presence and level of radio signals in the channels of flexible intermittent and wide-range receivers and transmitters in the main and reserve multi-mode ground stations, which are part of the central station of a radio communication system with mobile objects .

Literature

1. RF patent No. 2195774, M. cl. HB04 7/26, 2002.

2. RF patent №2245001, M. cl. HB04 7/26, 2005 (prototype).

3. B.I. Kuzmin. Digital Telecommunication Networks and Systems, Part 1. ICAO CNS / ATM Concept. Moscow - St. Petersburg: - NIIER OJSC, 1999. - 206 p.

4. V.V. Bochkarev, G.A. Kryzhanovsky, N.N. Sukhikh. Automated air traffic control. M .: Transport, 1999, 319 p.

5. A.V. Keistovich, L.M. Vdovin. Requirements for the characteristics of a multi-mode ground station for organizing VHF air-ground data transmission lines. / Collection of articles of the V International scientific and technical conference "Cybernetics and technology of the XXI century." Voronezh, 2004, p. 495-500 /.

6. SPEAKeasy program. International Symposium on Modern Radio Technologies. US Air Force ROME Research Laboratory. // Internet / - 2002

7. Tactical communication equipment JTR provides for the needs of special forces. destination. // Internet, file: //B:\Speak\Jtrs.htm 02/26/2002.

Claims (1)

The central station of a radio communication system with moving objects, containing the main ground station as a part of a receiver, a transmitter, a (2m + 1) -th modem, a channel signal processing unit (BOX) and a reception blocking block, the output of which is connected to the receiver input, and also containing a block message processing (BOC), a group of 2m modems, (2m + 2) -th modem, with the first input / output of the BFB connected in series through the (2m + 2) -th with the (2m + 1) -m modem, respectively, 2m inputs / the biofeedback outputs through 2m of the corresponding modems are low-frequency inputs / outputs of many stations, the initial installation of a clock generator and a block for converting formats into biofeedback is done by applying a “Reset” signal to the corresponding inputs, where m is the total number of paired ground stations in the zone, in the biofeedback format converting block is connected by two-way communications with a router, an address storage unit base, charging unit, the first message storage unit, the first display unit, the first control panel, the clock generator is connected to the sync inputs of the conversion unit format s, router, address base storage unit, tariffing unit, first message storage unit, first display unit, first control panel, address base storage unit is connected by two-way communications with the router and the charging unit, 2m inputs / outputs of the router are connected to the corresponding inputs / outputs 2m modems, characterized in that a similar primary backup ground station is introduced into it, and the backup ground station is connected by two-way communications to the biofeedback via the (2m + 3) th modem, introduced into the main The primary and backup ground stations of the computers are connected by two-way communications with the corresponding inputs / outputs of the BOX, the (2m + 1) -th modem, the second control panel, the second display unit, the second message storage unit and through the (2m + 1) -th and (2m + 2) -th modems with biofeedback, and the ground station computers have two-way communication with each other, and the inputs / outputs of the ground station computers through the corresponding modems are connected to the inputs / outputs of the router, the control bus of the computer is two-way I am connected to the corresponding inputs / outputs of the receiver, transmitter, reception blocking unit, first and second digital filters, analog-to-digital converter, digital-to-analog converter, BOX output through series-connected digital-to-analog converter, second digital filter, transmitter, high-frequency isolation is connected to the antenna, which through series-connected high-frequency isolation, reception blocking block, receiver, analog-to-digital converter, first digital filter connected It is connected to the BOX input, the input / output of the format conversion unit is the input / output of the station for information consumers, and the number of channel blocks in each ground station is determined by the need to simultaneously work with aircraft in different modes and the traffic intensity in this service area.