Global satellite communication and data transmission system with spacecraft at low circular orbit

FIELD: communication equipment.

SUBSTANCE: invention relates to communication equipment and can be used in satellite information systems. For this purpose a satellite communication and data transmission system consists of an orbital group of spacecraft with multi-beam antennae at low circular orbits, regional stations to facilitate communication and provide connection to external networks. Available frequency-orbital resource is uniformly distributed between different orbital planes. For each satellite a recovered width of the frequency band is uniformly distributed between the beams forming the satellite coverage area.

EFFECT: technical result is creation of a global satellite communication system making it possible to provide within the area of servicing various information services: voice communication, short messages sending, locating mobile users, collection and transmission of monitoring information to users with small-size user terminals.

1 cl, 3 dwg

 



 

Same patents:

FIELD: physics, communication.

SUBSTANCE: invention is related to procedure of transmission, reception and processing of electric signals and may by used in radio systems of information transmission. According to method, initial signal S1(t) is generated with spectrum S1(jω)=S1(ω)exp[-jϕ1(ω)], which is limited by frequency band Δω, where S1(ω) and ϕ1(ω) are amplitude and phase spectra of signal. Signal SRe(t) is generated, which corresponds to real component of spectrum S1Re(ω)=S1(ω)cosϕ1(ω) in the same frequency band Δω. Signal S2(t)=SRe(t) is transmitted through communication channel with limited efficient durability and with spectrum S2(jω)=S2(ω)exp[-jϕ2(ω)], where S2(ω) and ϕ2(ω) are amplitude and phase spectra of transmitted signal. Together with this signal, on appropriate time position, correcting signal Scor(t) is transmitted, which corresponds to weighting frequency function P(ω)=S1(ω)·S2(0)/S2(ω)·S1(0). On receiving side by signal S2(t) its amplitude spectrum S2(0) is defined, as well as spectrum that corresponds to its real component S2Re(ω)=S2(ω)cosϕ2(ω), and by correcting signal Scor(t) weighting frequency function P(ω). Assessment of initial signal amplitude spectrum and phase spectrum is carried out, and then, using Fourier inversion, initial signal is assessed, which reflects transmitted message.

EFFECT: reduction of structure redundancy and higher security of transmitted signals.

2 dwg

The invention relates to digital computing and can be used in digital computer systems in the processing of radar data for interoperability anti-aircraft self-propelled unit (ZSU) battery command post (BCP), control the weapons and radar station (radar) ZSU when combat work, verify system operation ZSU-mode control, provide training calculation ZSU

The invention relates to radio engineering, in particular to devices used to generate signals in a radio communication channel, and is intended for use in devices of dynamic cardiac monitoring

The invention relates to a multi-line telephone technique

FIELD: aircraft engineering.

SUBSTANCE: coordinates of a signal source are assessed and compared with the ground control complex coordinates stored in onboard memory. In case of good coincidence of coordinates the decision on legitimacy of a signal source is made. And in case of deviation of coordinates the commends received from an illegitimate signal source are blocked. therefore, the problem of protection of the command line of the spacecraft and, in particular, an exception of unauthorised access of illegitimate users to command-and-measurement system of the spacecraft is solved.

EFFECT: possibility of blocking of commands received from a illegitimate user including the protection against unauthorised intervention in operation of command-and-measurement system of a spacecraft.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in satellite communication systems. An apparatus (1) for distributing/receiving satellite signals includes a reflector (3), suitable for receiving and distributing radio signals, a distributing/receiving unit (2) which includes LNB (4), suitable for converting radio signals into electrical signals in a first frequency band, focused by the reflector (3), amplifying the electrical signals in the first frequency band and reducing the first frequency band to a first intermediate frequency band. The distributing/receiving unit (2) also includes a radiator (TX), suitable for amplifying electrical signals in a second intermediate frequency band having no common frequencies with the first intermediate frequency band, increasing the second intermediate frequency band to a second frequency band (S), converting the electrical signals in the second frequency band into radio signals and transmitting said radio signals to the reflector (3). The apparatus (1) also includes a housing (21), which includes a modulator (25) suitable for modulating electrical signals in the second intermediate frequency band, an output (32) suitable for transmitting electrical signals in the first intermediate frequency band to a decoder (31), and a coaxial cable (20) connecting the unit (2) and the housing (21).

EFFECT: improved noise-immunity of the system.

18 cl, 1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to space engineering and can be used for persistent tele- and radio communication with areas on Earth located outside the visibility zone of one satellite using a communication system consisting of two unified geostationary satellites. Slave satellites are fitted with radio navigation equipment and a navigation and motion control system; inter-satellite communication is augmented with two-way maintenance links; the slave satellites are located in the visibility zones of addressed ground communication stations which are inaccessible for the master satellite; control of the slave satellites and monitoring of the technical state thereof is carried out through the master satellite which is constantly located in the visibility zone of at least one ground command and tracking station and a ground communication station - antipodes of the addressed ground communication stations.

EFFECT: creating a space communication system with geographic antipode members, located in different arbitrary hemispheres from each other.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: present invention relates to a method of eliminating interference in a telecommunication network, comprising a multi-beam satellite, a coverage area made up of a plurality of cells in which terminals are located, at least two of said cells, referred to as the first and second cell, being associated with the same frequency band, a first earth station consisting of a first demodulator capable of demodulating signals transmitted by terminals located in the first cell and a second earth station consisting of a second demodulator different from the first demodulator capable of demodulating signals transmitted by terminals located in the second cell. The method advantageously uses information supplied by the terminal, particularly its position and transmission parameters, and enables to establish the corresponding G/T value. This information is then transmitted to the demodulator of the second earth station and will be used to reconstruct the signal incorporating the message and remove it from the received signal.

EFFECT: eliminating interference.

9 cl, 4 dwg

FIELD: physics, communication.

SUBSTANCE: invention relates to communications equipment and may be used in a communication system for an aircraft. A transceiving device (22) comprises at least one transmitter (24), at least one receiver (26, 28) and at least one antenna with at least one data processing device (12), connected with the transceiving device (22) by means of a data transmission device (20), and connected to the data processing device (12) by a control device (14), having manually operated switches, keys and/or handles (18) of adjustment, for input of data into at least one data processing device (12). A control device (14) is connected to one data processing device (12) mechanically into a single structural unit (16).

EFFECT: technical result consists in provision of communication facilities for an aircraft.

11 cl, 4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a communication system using telecommunication networks to set up radio-frequency connections between one main ground station, connected to a network control centre, and ground terminals through a multipoint communication satellite, and is intended to reduce crosstalk. The invention discloses a telecommunication network (100), which consists of a coverage area, which consists of multiple cells in which terminals (106) are located, wherein each cell is fixed at least behind one spot beam of the satellite to which the frequency band is allocated. The network control centre (105) comprises means of determining transmission parameters (108), characteristic for coordinates of the terminals in the coverage area, known as optimisation means, wherein the parameters cover the entire coverage area and means of transmitting all parameters (107, LMA, LDA) to each of the said ground terminals (106). Each terminal (106) comprises means of storing (112) at least a part of all the parameters, means of determining own geographic coordinates (113) in the coverage area and means of determining transmission parameters (114) for use based on parameters and geographic coordinates.

EFFECT: improved communication.

19 cl, 5 dwg

Compensation device // 2538784

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in satellite communication systems. The technical result is faster transmission of information owing to compensation for change in group delay. To this end, the system comprises a means of determining at least one of: phase deviation for a frequency channel from a plurality of frequency channels demultiplexed from a carrier for compensating for change in group delay in the carrier and gain deviation for the frequency channel for compensating for change in gain with the carrier; and a means of applying the determined at least one of: phase deviation and gain deviation in the frequency channel to restore the carrier from said plurality of frequency channels.

EFFECT: invention enables digital compensation for any undesirable change in group delay and gain, caused, for example, by analogue components such as filters in a satellite communication system.

8 cl, 10 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to satellite telecommunications. A superhigh frequency channel multiplexing device contains multiple elementary filters, connected in parallel to the common output via a transverse waveguide. The lower end of each filter is fixed to the base, common for all the filters. The upper end of each filter lies opposite to the base. Each filter also contains an outer side wall, at least one intracavity, defining an internal channel, a signal input, connected to the intracavity, and a signal output, connected to the transverse waveguide. The multiplexing device also contains a conducting radiating device, which is thermally and mechanically connected to at least two filters. The said conducting radiating device also contains at least one thermal plane and is connected to the outer side walls of at least two filters. The plane is fixed at a level of the filters upper ends.

EFFECT: decrease of the heat transfer rate at the channel section surface, operating in an out-of-band mode.

13 cl, 13 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to radio communication, particularly to a device for calibrating a multibeam satellite system, and is intended to facilitate calibration at any frequency within the bandwidth of the satellite system. The device includes a beam-forming circuit which provides a plurality of signal paths, wherein the device includes a calibration processor for determining phase and amplitude shifts of a test path of the plurality of signal paths through correlation of a calibration tone extracted from the test path with a reference calibration signal, wherein the calibration processor is configured to determine phase and amplitude shifts of the test path for at least two calibration tones of at least two different frequencies. The device also includes a means of applying an adjustment based on the determined phase and amplitude shifts to the test path in the beam-forming circuit. Two calibration tones of at least two different frequencies can be calibration tones input at two different frequencies and calibration tones converted at two different frequencies by the beam-forming circuit.

EFFECT: invention enables to calculate phase and amplitude shifts for each path through a beam-forming circuit for any frequency in the bandwidth of a multibeam satellite system and adjustments applied for formation or processing of required downlink or uplink beams of a multibeam satellite system.

23 cl, 11 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a satellite communication system. A fixed transceiver system includes a first antenna designed to be positioned outside the area of non-visibility of the satellite and a second antenna connected to the first antenna and designed to be positioned in the area of non-visibility of the satellite. The fixed system is configured to receive through the first antenna downlink signals transmitted by the satellite on one downlink carrier frequency and to transmit the received downlink signals on one downlink carrier frequency in the area of non-visibility of the satellite through the second antenna. The mobile system is designed to be installed on a vehicle, includes a third antenna and a fourth antenna, and is configured to receive through the third antenna the downlink signals transmitted by the fixed transceiver system on one downlink carrier frequency, to receive through the fourth antenna the downlink signals transmitted by the satellite on one downlink carrier frequency, to determine whether the vehicle is in the area of non-visibility of the satellite or in an area of visibility of the satellite, and to transmit uplink signals on one uplink carrier frequency through the third antenna if the vehicle is in the area of non-visibility of the satellite or through the fourth antenna if the vehicle is in the area of visibility of the satellite. The fixed system is further configured to receive through the second antenna the uplink signals transmitted by the mobile transceiver system on one uplink carrier frequency and to transmit the received uplink signals to the satellite on one uplink carrier frequency through the first antenna.

EFFECT: extending communication between a vehicle and a satellite in the area of non-visibility of the satellite.

16 cl, 10 dwg

FIELD: communications engineering.

SUBSTANCE: proposed system has user terminal, gateway, and plurality of beam sources radiating plurality of beams, communication line between user terminal and gateway being set for one or more beams. Proposed method is based on protocol of message exchange between gateway and user. Depending on messages sent from user to gateway, preferably on pre-chosen periodic basis, gateway determines most suited beam or beams to be transferred to user. Messages sent from user to gateway incorporate values which are, essentially, beam intensities measured at user's. Gateway uses beam intensities measured at user's to choose those of them suited to given user. Beams to be used are those capable of reducing rate of call failure and ensuring desired separation level of beam sources.

EFFECT: reduced rate of call failure in multibeam communication system.

20 cl, 27 dwg

FIELD: communications engineering; satellite communication systems.

SUBSTANCE: list identifying plurality of shared data channels transmitting shareable information is generated in satellite communication system incorporating gateway and plurality of satellites moving in orbit so that they are not stationary relative to point on the Earth surface. This list may include information for each of plurality of shared data channels that identifies predetermined satellite, beam, frequency, and channel. List changes with time due to orbital movement of satellites. Proposed method also includes steps of shareable information transfer to geographical region through gateway over plurality of shared data channels and reception of shareable information over at least one of plurality of shared data channels by user terminal.

EFFECT: provision for transferring shareable information to group of users located within relatively small geographical area.

41 cl, 9 dwg

FIELD: signal power evaluation.

SUBSTANCE: signal is compared with plurality of bands and separated into plurality of bands. Each band is assigned definite output value. Output values approximate square of output signal value proceeding from known characteristics of input signal. Low-pass filter is used for averaging plurality of output values.

EFFECT: eliminated satellite overloading and violation of flow density limits.

21 cl, 5 dwg

FIELD: game systems with robots.

SUBSTANCE: proposed system has game section installed in space equipment, game robots disposed within game section, control signal, device for transmitting control signal received from the Earth to game robots, video shooting camera for shooting game section whose photo is used as section image; game signal transmitter transferring game image to the Earth as game signal; control signal transmitter disposed on the Earth and used to transmit control signal applied by game robot operators to control signal transmitter; game signal receiver disposed on the Earth and used to receive game signal from game signal transmitter; broadcast equipment for broadcasting game signal received by game signal receiver.

EFFECT: investigations of environment properties.

9 cl, 1 dwg

Airborne repeater // 2251214

FIELD: communications engineering.

SUBSTANCE: proposed repeater that can be used in satellite communication systems operating in ultrahigh-frequency band has antenna-feeder assembly, receive and transmit filter unit, up and down frequency converters, power amplifiers, transmission channel multiplex switch, reference generator, signal regeneration device, simulation protective unit, control device, and cross-connection circuit.

EFFECT: enlarged functional capabilities of airborne repeater.

7 cl, 2 dwg

FIELD: radio communications.

SUBSTANCE: method includes registering spectrum grams Fi of radio signals in i-numbered points of flight trajectory in frequencies band, including frequency signals with several transmitters in each one, with onboard computer and position measuring means. Spectrum gram of total power of transmitter signal of each j-numbered frequency channel is separated from Fi and powers Mij of these total signals are determined.

EFFECT: higher safety.

3 cl, 3 dwg, 1 tbl

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