RU2297716C2 - Satellite information system - Google Patents

Abstract

FIELD: data message transfer over television channels through space relay station.

SUBSTANCE: additionally introduced in space information system that has ground-based transmitting center is receiver which transforms in into transceiving center. Additionally introduced in local information-shaping center are demodulator, decoder, and terminal (display). Newly introduced in relay station are demodulator, decoder, web-service, coder, modulator, return-channel frequency converter, return-channel intermediate-frequency amplifier, return-channel demodulator, return-channel decoder, return-channel coder, return-channel modulator, second return-channel frequency converter, and return-channel power amplifier.

EFFECT: enhanced efficiency of system control and control of transmitted and received information.

1 cl, 3 dwg

Description

The invention relates to a special technique (special electronics), ensuring the transmission of information messages on a television channel through space relay stations.

A known satellite information system in which the transmission of information messages via a television channel through space relay stations is used (see USSR author's certificate No. 1801249 A3, class Н04В 7/185, publ. 1993), consisting of a transmitting antenna, transmitter, local data center, receiving antenna, transmitting antenna, receiver, transmitter, data center, transmitting and receiving antenna, repeater, time system, receiving antenna, receiver, cable network local area network vision block allocation information signal of a television receiver.

A disadvantage of the known system is the relatively low adaptability of the system management, the low efficiency of the management of transmitted and received information and the low stability of the system management due to the lack of a web service [Menask D., Almeida V. Web services performance. Analysis, evaluation and planning: Per. from English / - St. Petersburg. Dia-SoftYUP, 2003. - 480 p.] On the repeater.

A well-known satellite information system (Kantor L.Ya., Minashin V.P., Timofeev V.V. Satellite broadcasting, M .: "Radio and communication", 1981), which allows the introduction of a special channel to increase the amount of transmitted information, update information messages coming from various regions of the country.

However, the disadvantage of this system is the relatively low adaptability of the system control, the low efficiency of the control of transmitted and received information and the low stability of the system control due to the lack of a web service on the relay.

The technical result of the invention is to increase the adaptability of system management, increase the efficiency of management of transmitted and received information, increase the stability of system management.

The specified technical result is achieved by the fact that in the satellite information system containing a ground-based transmitting center, consisting of a local center for generating information, a transmitter, a transmitting antenna, a receiver is further included, while the transmitting center becomes a transceiver center. A demodulator, a decoder, and a terminal (display) are additionally introduced into the local center for generating information, consisting of a device for converting information into code, a storage device, a timer, a control unit, a modulator of a transmission channel, an information compression unit. The repeater, consisting of a series-connected separation filter, a first frequency converter, an intermediate frequency amplifier, a second frequency converter, a power amplifier, additionally includes a demodulator, a decoder, a web service, an encoder, a modulator, a return path frequency converter, an intermediate path return amplifier, return path demodulator, return path decoder, return path encoder, return path modulator, second return path frequency converter and amplifier return path power. The web service allows you to coordinate the actions of the local center (local centers) of the formation of information and bring them into line with the current needs of the data center. So, for example, information about which particular information is needed at the moment and which has already become irrelevant, can be placed in a web service. Thus, the adaptability of the control system.

The efficiency of managing the transmitted and received information is increased due to the fact that the requirements of the data center can be very quickly posted on the web service, regardless of whether the employees of the local center (local centers) of the formation of information at this moment receive this information (i.e. .Do not "dial" to each of them to transmit information). Then the employees of the local center (local centers) for generating information at the earliest opportunity can view the contents of the web service and receive up-to-date information regardless of whether the data center employees are capable of transmitting this information at that moment. Thus, significantly increases the efficiency of management of transmitted and received information.

The stability of the system management is increased due to the fact that in the event of a temporary communication failure between the data center and the local center (local centers) of the formation of information (due to interference, technical malfunctions, etc.), the employees of the local center (local centers) of the formation of information in this period can still receive the latest (at the time of communication failure) information, since it has already been uploaded to the web service earlier.

The implementation of the claimed invention is illustrated using figures 1-3.

Figure 1 shows a satellite information system in general form, where the transceiver antenna 1, the transmitter 2 are indicated, the receiver 2/1, the local information generation center 3, the receive antenna 4, the transmit antenna 5, the receiver 6, the transmitter 7 are further included in the circuit data center 8, transceiver antenna 9, repeater 10, single time system 11, receive antenna 12, receiver 13, cable television local area network 14, signal information extraction unit 15, television receiver 16.

Figure 2 shows the local center for the formation of information, where the devices for converting information into code 17-1 ... 17-N, storage device 18, timer 19, control unit 20, transmission channel modulator 21, information compression unit 22 are further included to the circuit demodulator 21/1, decoder 21/2, terminal (display) 21/3.

Figure 3 shows a repeater where a purity converter 23 with a local oscillator 26, a converter 24, a separation filter 25 and a conversion circuit, a second frequency converter 29 with a local oscillator 27, a power amplifier 28 are indicated, an additional demodulator 29/1, a decoder 29 / 2, web service 29/3, encoder 29/4, modulator 29/5, first return path frequency converter 23/1, intermediate path return frequency amplifier 24/1, return path demodulator 29 / 1-1, return path decoder 29 / 2-2, return path encoder 29 / 4-4, return path modulator 29 / 5-5, sec oh frequency converter 29/6, power amplifier 28/1.

The proposed system works as follows. Current information in various regions is collected at local information generation centers. In devices 17 for converting information into code and memory 18, where a set of information signals, each of which has a label, forms a block of information for transmission. Further, the information is compressed by volume and in the form of discrete signals is supplied to the modulator 21 of the transmission channel. The radio signal through the transmitting device, the antenna enters the separation filter 25, then through the first frequency converter 23 and the intermediate frequency amplifier 24, the radio signal enters the demodulator 29/1, decoder 29/2, information from the decoder 29/2 goes to the web service 29/3 , which receives information from the control center and the local information generation center, places it on the corresponding web pages. At the same time, employees of local centers receive an operational task for collecting information, and control room employees receive a report on the progress of information collection in the regions, the 29/4 encoder converts information from the 29/3 web service into a radio signal, then through a 29/5 modulator, a frequency converter 29, a power amplifier 28 and artificial Earth satellite equipment 10 are relayed to a control room. The system for relaying many signals from local centers via a satellite operates in a time division mode. To synchronize the work, timers 19 and 35 were introduced into the local information generation device 3 and into the data processing center 8, the synchronization of which is carried out from external sources, for example, from a single time system 11. Information from many information supply registers is collected in the control room using block 32 information retrieval by labels is sorted and stored in memory 33, from where information messages are received for transmission to the consumer, and these messages are continuously updated by incoming signals from new information. The control unit 37 sets the addresses in the memory 34, the control unit 38 gives the setup code of the information selection unit 33 in the memory to a specific section of information messages. Further, information messages are compressed by volume, converted into a radio signal and transmitted through an artificial Earth satellite in the time division mode to ground receiving centers located throughout the country. Here, informational messages are distributed through a local cable television circuit. In this case, the television receiver receives information messages through the antenna. The video signal carrying information messages is removed from the amplitude detector of the television receiver 16 and fed to the comparator 41 of the signal information extraction unit 15, in which the signal levels are normalized. The resulting logical signal is fed to a code decoder that extracts data in a serial code and the accompanying clock pulses from the received signal. Using the shift register 43, the selector 44 of the separation pulses, the counter 45 clocks and the decoder 48, the data from the serial code is converted into parallel and written to the storage register 46, of which information through the circuit 49 for detecting and correcting errors is fed to the input of the memory 50 and simultaneously to the input a digital comparator 52, to the other input of which signals from the control unit 53 are supplied, which determines the code mark for selecting an information message and the time for information to be displayed on the display screen 16 using the control panel. The reading program is set by the control unit 53 and is a specific label code information message. Further, the program code is compared with the codes of directly incoming information. If they coincide in the digital comparator 50, the information message is read into the memory 50 and transmitted to the code converter 47. The code converter 47 in the television image signal generates synchronizing pulses and image signals (R, G, B), which enter the horizontal and frame synchronization unit and the video amplifier unit (R, G, B) of the television receiver. Thus, informational messages are displayed on the display screen.

The web service contains up-to-date information about which information is needed at the moment and which has already become irrelevant. In turn, the employees of the local center (local centers) for generating information view the contents of the web service and receive up-to-date information on how to adjust their work in accordance with the changing requirements of the data center.

The proposed information system has the following advantages: high adaptability of system management, high efficiency of management of transmitted and received information, high stability of system management.

Claims (1)

A satellite information system comprising N ground-based transmitting centers including sequentially connected local information-forming centers, a transmitter and an antenna, an artificial Earth satellite including a transceiver antenna connected to a repeater containing an isolation filter, a first frequency converter, an intermediate frequency amplifier, a second frequency converter and power amplifier, a control room, a ground receiving station including serially connected a receiving antenna, a receiver, a local cable television circuit, a television receiver, characterized in that the receiver is additionally included in the ground transmitting center, while the transmitting center becomes a transceiver center, a demodulator, a decoder, a terminal (display) are additionally included in the local information generation center, repeater introduced sequentially demodulator, decoder, web service, encoder, modulator, frequency converter, return path, intermediate frequency amplifier return path, demodulator the return path, the return path decoder, the return path encoder, the return path modulator, the second return path frequency converter and the return path power amplifier, while the radio signal from the local data transmission center through the transmitting device and the antenna enters the relay crossover filter, then through the first frequency converter and the intermediate-frequency amplifier, the radio signal enters the demodulator, decoder, information from the decoder enters the web service, the encoder converts the information from -service in radio, then through the modulator, a second frequency converter, power amplifier and equipment artificial satellite relayed to the control room, then informational messages via the artificial satellite are transmitted to the ground receiving centers.

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