Method, base station and mobile terminal with low power transmission mode

FIELD: information technology.

SUBSTANCE: low power transmission mode is provided in a mobile terminal. The method involves steps of transmitting an access request to a base station; receiving, in response to the access request, from the base station a request to transmit using a low power transmission mode; communicating with the base station using a reduced transmit power level. The request from the base station comprises a request to disable a base station search function. Invention can be applied in power sensitive environments, e.g. inside an airplane or a hospital.

EFFECT: possibility of using mobile telephones in power sensitive environments.

19 cl, 6 dwg

 

The technical field to which the invention relates.

The present invention relates to a mobile terminal for use in an environment with constraints on energy supply. The mobile terminal uses the transmission mode with reduced or low power operation in an environment with constraints on energy supply, for example, inside the plane. The present invention also relates to a method for operating a mobile terminal using the transmission mode with small power.

The level of technology

The popularity and use of mobile terminals or mobile phones has grown rapidly over the last 20 years. Now people take their mobile phones everywhere with them, even when they are traveling. However, in places where using mobile phones is limited, are airplanes and other environment with constraints on energy supply, such as a hospital. The use of mobile phones in aircraft is limited due to the fact that transmission of large power from mobile phones may interfere with aircraft systems used during the flight.

The airline used a different system of aviation telephone communications to provide its passengers with the ability to make phone calls during the flight. These systems, however,require the use by a passenger of one of the phones, provided by airlines plane. Typically, these systems use cable phones, which are connected by wires to the backs of chairs in some places in the cabin of the aircraft. Since the phones are connected to the telephone system using wire, high transmit power levels don't matter. Unfortunately, there are several problems when using these systems, telephone communication. When a passenger wishes to make a call, the phones can be used by other passengers, or the nearest phone may be broken or not maintained. In addition, these phone systems are very expensive to install and support. Finally, passengers, if you have a choice, prefer to use their own mobile phones.

As mentioned above, the problem of using mobile phones in the plane is the probability of interference for systems flight control of the aircraft. For example, in communication systems such as GSM (Global System for Mobile Communications global System for Mobile Communications), UMTS (Universal Mobile Telecommunications System Universal Mobile telecommunications System), EDGE (Enhanced Data for GSM Evolution is a Promising technology for the development of standard GSM), GPRS (General Packet Radio Service - the General Packet Radio service Destination), a mobile phone during the initial configuration is transmitted PA is no random access channel parallel access (cap). Package random access is always transmitted at full power. These transmission at full power, of course, can interfere with the systems of the aircraft. Another problem with the use of these communication systems is that when the first base station has been found, the mobile phone continues to search for other (better) base station. Therefore, even if the base station was placed in an aircraft, the mobile phone will continue to search for other base stations that are outside of the aircraft. For example, a mobile phone, connected to the base station on the plane, could find a base station on earth and try to switch to this base station. All this search leads to the transmission of high power from the mobile phone, which may interfere with control systems flight of the aircraft.

Thus, a need exists for a method and device to enable operation of mobile phones in the environment with constraints on energy supply by controlling the power level of transmissions from the mobile phone.

Disclosure of inventions

According to a variant implementation of the method for operating the mobile terminal using the transmission mode with low power contains stages, which transmit the access request to the base stations is; take in response to the access request from the base station a request for transmission using the transmission mode with low power; and communicate with the base station using a reduced power level.

The stage at which accept the request can contain the stage, which take at least an identification code, which is a request for transmission using the transmission mode with low power and that identifies the base station as a special base station.

The stage at which accept the request may include the stage at which accept a request to disable the search function of the base station.

The stage at which transmit the access request may contain a stage on which to transmit the access request using a pre-defined value of the parameter of the reduced transmit power that is less than the maximum possible value of the parameter transmit power.

The method may include the stage at which accept assigned a lower level of transmission power from the base station for subsequent transmission time transmission mode with small power.

The method may include the stage at which accept a transfer request from a special base station that is a base station in an aircraft.

The method may include the step on to the torus accept a transfer request from a special base station, which operates in an environment with constraints on energy supply.

The method may include the stage at which transmit the access request using the maximum transmit power when said mobile terminal is not in transmit mode with low power. The stage at which accept the request may include the stage at which accept the request from the base station to switch to the transmission mode with low power when the maximum power above a predefined level.

The method may include the stage at which compare the identification code with at least one identification code stored in the mobile terminal to determine whether the adopted identification code special base station.

The method may include the phase in which the block searching for a base station when the base station is not detected using transmission mode with small power.

According to another variant implementation, the mobile terminal can operate in transmission mode with a low power contains a processing device; a transmitting device configured to transmit the access request to the base station; and receiving unit configured to receive, in response to the transmitted access request from the base of one hundred is the transfer request using the transmission mode with low power. The transmitting device is performed by establishing a communication with the base station using a reduced power level for transmission mode with small power.

The processing device can be configured with the ability to determine, identify whether the identification code, which is accepted in transfer request, a special base station, and lock search function to the base station when the base station is a special base station.

The transmitting device may be configured to transmit the access request using a predefined parameter values reduced power when the mobile terminal is in the transmission mode with small power.

The receiving device can be made with the possibility of receiving the designated low power level from the base station for subsequent transmission time transmission mode with small power.

The mobile terminal may be portable or portable equipment, mobile radio, mobile radio terminal, a mobile phone, a smartphone, a data communication device or any other electronic device with wireless transmission of speech signals.

According to another variant implementation of the method for operating a base station in the surrounding the ed with constraints on energy supply includes the steps which accept the access request from the mobile terminal; determine a power level of the access request; and send the request to the mobile terminal entering the transmission mode with low power when the power level of the access request is above a predefined level.

The stage on which the request may contain the phase in which the sending mobile terminal identification code, which identifies the base station as a special base station that is a request for inclusion in the transmission mode with small power.

According to another variant implementation of the base station for operation in the environment with restrictions on power supply contains a receiving unit, configured to receive the access request from the mobile terminal; a processing device configured to determine the power level of the access request; and a transmitter, configured to send a request to the mobile terminal entering the transmission mode with low power when the power level of the access request is above a predefined level.

The transmitting device may be configured to send the mobile terminal identification code, which identifies the base station as a special database the first station, what is a request for inclusion in the transmission mode with small power.

According to another variant implementation of the computer software product contains the part of the executable computer program code for implementing the method for operating the mobile terminal when the said part of the executable computer program code executed by an electronic device having the functionality of a computer.

A computer software product containing portion of the executable computer program code for implementing the method for operating the mobile terminal may include a computer-readable medium, the recording medium or in the signal.

According to another variant implementation of the computer software product contains the part of the executable computer program code for implementing the method for operating a base station, when the said part of the executable computer program code executed by an electronic device having the functionality of a computer.

A computer software product containing portion of the executable computer program code for implementing the method for operating a base station may include a computer-readable medium, the recording medium or in the signal.

Fill in the additional embodiments of the present invention are defined in dependent claims.

Some embodiments of the present invention provide a transmission mode with a low power for mobile terminals when they are in flight mode.

An advantage of embodiments of the present invention is that the mobile terminal operates without affecting the flight management system of the aircraft, at the same time saving energy by functioning at lower levels of transmission power.

You need to especially pay attention to the fact that the term "contains/containing" when used in this description of the invention assumes the presence of stated features, solid parts, steps or components but does not preclude the presence or addition of one or more of the other signs, one-piece parts, steps, components or their aggregates.

Brief description of drawings

Additional objectives, features and advantages of embodiments of the present invention will become clear from the subsequent detailed description with reference to the accompanying drawings, on which:

Fig. 1 is a structural diagram of a mobile terminal according to one variant of implementation of the present invention;

Fig. 2 is a schematic diagram of a communication system according to one variant of implementation of this breath is retene;

Fig. 3 is a structural diagram of a communication system in an aircraft according to one variant of implementation of the present invention;

Fig. 4 is a block diagram of one variant of the method for operating a mobile terminal using a transmission mode with a low power according to one variant of implementation of the present invention;

Fig. 5 is a structural diagram of a base station according to one variant of implementation of the present invention; and

Fig. 6 is a block diagram of one variant of the method for operating a base station in an environment with constraints on energy supply according to one variant of implementation of the present invention.

The implementation of the invention

Fig. 1 illustrates the mobile terminal 1. The mobile terminal 1 may contain man-machine interface, such as a specialized keyboard 2, a display device 3, the coordinate pen 4, a microphone 5 and the speaker 6 through which the user can interact with the mobile terminal 1. The mobile terminal 1 may be portable or portable equipment, mobile radio, mobile radio terminal, a mobile phone, a smartphone, a data communication device or any other electronic device with the capabilities of the wireless transmission of speech signals or data. Thus, the mobile terminal 1 can communicate with the network 10.

The mobile terminal 1 may include various applications to perform functions within the mobile terminal 1. Applications can be envisaged in the framework of the operating platform. Alternatively or additionally, the application may be provided as part of the communications platform. The operating platform can contain system software executed by the processing device applications, such as COC (Central processing unit) 7, which may also be referred to as COP (COC application). Similarly, the communication platform may include hardware and software for performing, for example, the communication network 10. Thus, the communication platform may also contain the OCC, which may be referred to as CCO (communication centres), to provide a variety of applications. COUP, CCO can operate under various operating systems. In addition, the communication platform and the operating platform can interact to exchange information.

The mobile terminal 1 also contains the transmitting device 11 and the receiving device 12 (or transceiver) device to send signals to the network 10 and receive si the signals from it. The mobile terminal 1 may also contain a device 13 power control of the transmission to control the transmission power used by the mobile terminal 1. The device 13 to regulate power transfer can be part of the transmitting device.

Fig. 2 illustrates a communication system 100, which includes the environment with restrictions on power supply according to one variant of implementation of the present invention. In this illustrative example, the environmental constraints on energy supply is an internal space of the aircraft 102, such as an aircraft. The present invention is also suitable for any other environmental constraints on energy supply, such as the airport, airport, nuclear power plant, hospital, etc. and the present invention is not limited to this.

The network 100 may be a cellular system, which may consist of multiple mobile terminals communicating through a variety of terrestrial base stations 108a-c. The base station can be connected to the public switched telephone network (PSTN) 110 well-known manner. In addition, the network 100 may also contain a satellite 112 to further facilitate communication between the mobile terminal.

Aircraft 102 span the et through many cells (not shown), which can be served by terrestrial base stations 108a-c. Aircraft 102 contains an onboard base station (WSBS) 104 and at least one mobile terminal 106. As will be explained in more detail below, the mobile terminal 106 may communicate with devices inside and outside of the aircraft 102 through the network 100 connection. Mobile terminals 106 communicate with the onboard base station 104 using the transmission with low power so as not to interfere with the systems of the aircraft 102. Connectivity for passengers along the line of air - ground between aircraft 102 and ground devices, such as phones, can be achieved through the transfer of messages from the onboard base station 104 and terrestrial base stations 108a-c on line 116 radio. Alternatively, on-Board base station 104 may use the line 118 radio to the satellite 112 to facilitate communication between the mobile terminals 106 and ground-based phones.

Terrestrial base stations 108a-c may be base stations that are allocated for communication with the aircraft. Terrestrial base stations can be combined or functionally associated with the base stations of other networks, such as GSM, UMTS, GPRS, and/or communications network technology EDGE.

Pony the n transmit power or power level when used in the present description means the transmit power or the power level which is smaller than the maximum transmit power or power level that can use the mobile terminal 106. Reduced transmit power level may be within a certain lower boundary of the range of power transmission, the mobile terminal 106. The particular range may be, for example, less than 100 mW and 1 mW. The maximum allowable transmit power low transmit power may, for example, be set depending on the maximum expected attenuation of signals in the environment of the base station.

To search for base stations in the transmission mode with a low power level transmit power may be, for example, the output power of 5 mW, which is the minimum output power for GSM. Alternatively, the power level to search for a base station in a transmission mode with a low power can be output power of 5 mW. These levels are only examples. Can be used as other examples that should be tested and evaluated for each specific case.

The transmit power may be reduced, for example, by regulating the transmit power applied by the power amplifier of the transmitting device. After establishing the communication line transmit power can be adjusted by the base station.

is the turn 116, 118 radio and lines of communication between the base station 104 and the mobile terminal 106 typically contain at least one pilot signal, and a multitude of radio speech channels, but the present invention is not limited to this. Each base station 108a-c transmits the pilot signal to the aircraft 102. The pilot signal informs the aircraft 102 a variety of information, such as the availability of the speech channel, frequency, etc.

Fig. 3 illustrates a communication system for use in aircraft 102. As mentioned above, the aircraft communication system contains on-Board base station 104 and at least one mobile terminal 106a-f. It is clear that aviation communication system may contain any number of airborne base stations 104.

Next will be described the operation of the mobile terminal 106 in aircraft 102 with reference to Fig. 4. The mobile terminal 106 according to one variant of implementation of the present invention equipped with a transmission mode with a reduced or low power or "flight mode". When the mobile terminal 106 is in transmission mode with a low power, mobile terminal 106 uses a pre-defined value of the power parameter for transmission, and a pre-defined value of the power parameter is less than the maximum C is Uchenie parameter power for a single mobile terminal 106. Thus, when establishing communication with the base station in an aircraft 102 will use a reduced power level when the mobile terminal 106 is included in the transmission mode with low power. The mobile terminal 106 may be manually set in the transmission mode with a low power user, for example at the entrance to the aircraft 102. Alternatively, the mobile terminal 106 may automatically switch to the transmission mode with a low power request to perform this from the network 100 connection.

At the beginning of the requested communication, the mobile terminal 106 first determines whether it is in flight mode, at step 401. If the mobile terminal 106 is in flight mode, mobile terminal 106 will transmit the access request, such as a packet random access, channel access, such as a parallel channel access (cap), using a predefined power level below the maximum power output stage 403. Some minimum and maximum power levels for different communication systems are described below.

The maximum power level for GSM antenna is 2 W (33 dBm over 1 mW). The minimum level is 1 mW. The maximum distance between the BS on the ground level is 35 km.

The maximum power level for DCS/PCS (igital Cellular System - Digital cellular system, GSM 1800/Personal Communications Service personal communication System, GSM 1900) is 1 W (30 dBm over 1 mW). This level is adjustable through the loop power control in a mobile terminal.

The maximum power level for Bluetooth technology is 0.1 W (20 dBm above 1 mW),

The maximum power level for technology WCDMA is located in the class III power 0.25 W (24 dBm over 1 mW). Or in the power class IV 0.125 W (21 dBm over 1 mW). The minimum power level for technology WCDMA is already 10 NVT.

The maximum power level for the GPRS technology is divided into classes from 8 W (39 dBm) to 0.8 W (29 dBm). The minimum power level for the GPRS technology is 3.16 mW.

If it is determined that the mobile terminal is not in flight mode, mobile terminal 106 will transmit a packet random access to full or maximum power, at step 405. In one embodiment, the mobile terminal 106 then receives the request from the onboard base station 104 to switch to flight mode at step 407. The query may be displayed on the display device 3 so that the user was informed about the request, and the user can manually switch the mobile terminal 106 in flight mode. Therefore, a query is presented the better a text message. Alternatively, the mobile terminal 106 may automatically switch to flight mode in response to the query at step 409.

On-Board base station 104 may also transmit a broadcasting channel, a new level of transmission power for the mobile terminal 106 for use in subsequent transmissions to the onboard base station 104, at step 411.

In some embodiments, the implementation of the on-Board base station can transmit an identification code, such as ID: 001 01, which identifies the base station. The base station can be identified as a special base station. Special base station may be a base station provided for environmental constraints on energy supply, and to establish which mode should be used transmission with low power. The identification code may be a request for transmission using the transmission mode with low power. Thus, it can be transmitted to the access request using the maximum power level, and the answer is received identification code. After that, the mobile terminal can establish a connection using a reduced power level when the subsequent transfer.

When the identification code adopted by the mobile terminal 106, mobile is the terminal identifies the base station as a special base station, for example, the onboard base station. For example, the identification code may be compared with the identification codes stored on the mobile terminal 106, to understand whether the identification code to a special base station. For base stations in different environments, such as aircraft, hospitals, etc. can be used different identification codes. When the base station is identified as a special base station, the mobile terminal can block your search base station to the mobile terminal 106 did not search for other base stations, at step 413. Instead, the mobile terminal 106 is connected to an on-Board base station 104 at step 415, while flight mode is turned off. Moreover, if the mobile terminal 106 is in flight mode and finds a special base station, the mobile terminal 106 will not attempt to search for other base stations.

Fig. 5 illustrates one implementation of the base station 420 according to the present invention. The base station includes a receiving unit 421, the transmitting device 422 and the processing unit 423. Receiving unit 421, and a transmitting unit 422 is configured to establish communication with the mobile terminal 106. The processing unit 423 is ipodnano with the ability to perform the functions of base stations, for example, the definition does mobile terminal 106 transmission using the transmission mode with low power. In addition, the processing device may be configured to training requests, which will be transmitted to the mobile terminal 106.

Next will be described the operation of the onboard base station with reference to Fig. 6. When the airborne base station receives the access request from the mobile terminal 106 at step 501, on-Board base station 104 first determines, for example, measuring or assessing, the transmit power level of a received signal at step 503. If the transmit power is above a predefined level, on-Board base station sends a request to the mobile terminal 106 to the switch or occurrence in the transmission mode with a low power stage 505. On-Board base station 104 may also transmit a broadcasting channel, a new level of transmission power for the mobile terminal 106 for use in subsequent transmissions to the onboard base station 104 at step 507. As the request of, or in addition side, the base station may transmit an identification code, which identifies the base station as a special base station. Then onboard base station establishes communication with the mobile terminal 106 and terrestrial base stations 108a-c and the and the satellite 112, if necessary, at step 509.

And the mobile terminal, and a special base station may contain a processing device to perform the above definitions. For example, the processing unit of the mobile terminal 106 may be configured to determine whether the transfer request using the transmission mode with low power and any identification code, determining whether the base station is a special base station, etc. Similarly to the processing device, the base station may be configured to determine whether the power level of a received signal above a predefined level. The predefined level may be the level corresponding to the maximum allowable power level in transmission mode with a low power.

When using the transmission mode with a low power can be limited not only the transmission power for communication with the base station. Also may be reduced transmission power for communication with other electronic devices, such as communication using the communication capabilities of a small range, such as connectivity using Bluetooth technology and/or BLS (Wireless LAN).

The present invention can be provided in a computer program is mnom product, which enables implementation of the method and functions described in the present description. The present invention can be carried out when the computer program product is loaded and executed in a system having computing functionality, such as processing device. In this context, a computer program, the program of the software package, software product or software means any representation, using any programming language, code or notation, of a set of instructions designed to bring the system with the technological capabilities to perform a particular function either directly or after conversion to another language, code or notation. The computer software product may be stored on computer-readable media.

The computer software product may contain portions of the executable computer program code for implementing the method, which is described in the specification and the claims, for the operation of the mobile terminal or base station, when the said part of the executable computer program code executed by an electronic device having the functionality of a computer.

Computer or-readable wear the e l e C storing on the computer software product may contain portions of the executable computer program code for implementing the method, which is described in the specification and the claims, for the operation of the mobile terminal or base station, when the said part of the executable computer program code executed by an electronic device having the functionality of a computer.

The present invention was described above with reference to certain embodiments of. However, within the scope of the present invention is possible variants of implementation, other than the above. Within the scope of the present invention can be provided by the steps of the method other than those described above, performing the method by hardware or software, or a combination of hardware and software. The various signs and stages of the present invention can be combined in combinations other than those described. Scope of the present invention is limited only by the attached claims.

1. A method of operating a mobile terminal using the transmission mode with low power, and the method comprises the steps on which
transmit the access request to the base station;
receive, in response to the access request from the base the station, at least one identification code, which is a request for transmission using the transmission mode with low power;
identify the base station as the base station that operates in the environment with constraints on energy supply; and
establish communication with the base station using a lower power level.

2. The method according to claim 1, wherein the stage at which accept the request contains the stage at which accept a request to disable the search function of the base station.

3. The method according to any one of claims 1 and 2, in which the stage at which forwards the request contains a stage on which to transmit the access request using a pre-defined value of the parameter of the reduced transmit power that is less than the maximum possible value of the parameter transmit power.

4. The method according to any one of claims 1 and 2, containing also the time that
take assigned a lower level of transmission power from the base station for subsequent transmission time transmission mode with small power.

5. The method according to claim 4, which contains the stage at which accept the transfer request from the base station, which operates in an environment with constraints on energy supply and is the base station in an aircraft.

6. The method according to claim 1, comprising the steps n is:
transmit the access request using the maximum transmit power when said mobile terminal is not in transmit mode with low power; and where the
referred to the stage at which accept the request contains the stage at which accept the request from the base station to switch to the transmission mode with low power when the maximum power above a predefined level.

7. The method according to claim 1, which contains the stage at which compare the identification code with at least one identification code stored in the mobile terminal to determine whether the adopted identification code of the base station, which operates in an environment with constraints on energy supply.

8. The method according to claim 1, containing also the time that
block search base station when the base station is not detected with the use of the transmission mode with small power.

9. The mobile terminal (1)which has a capability of functioning in transmission mode with low power, and the mobile terminal includes:
processing device (7);
the transmitting device (11), made with the possibility of transmission of the access request to the base station; and
the receiving device (12)which has a capability of receiving, in response to the transmitted access request from baseballstyle transfer request using the transmission mode with low power moreover, this transfer request contains at least one identification code
moreover, the processing device (7) is arranged to determine, identifies whether the at least one identification code of the base station that operates in the environment with constraints on energy supply; and
when the transmitting device (11) configured to establish communication with the base station using a reduced power level for transmission mode with small power.

10. The mobile terminal according to claim 9, in which the processing device (7) is made with an additional option to lock the search function to the base station when the base station is a base station operating in an environment with constraints on energy supply.

11. The mobile terminal according to claim 9 or 10, in which the transmitting device is configured to transmit the access request using a predefined parameter values reduced power when the mobile terminal is in the transmission mode with small power.

12. The mobile terminal according to claim 9, in which the receiving device is configured to receive assigned a reduced power level from the base station for subsequent transmission to the time mode with small power.

13. Mobile is terminal according to claim 9, moreover, the mobile terminal is a portable or portable equipment, mobile radio, mobile radio terminal, a mobile phone, a smartphone or a data communication device.

14. A method of operating a base station in an environment with constraints on energy supply, and the method comprises the steps are:
receive an access request from a mobile terminal;
determine the power level of the access request and
send the request to the mobile terminal in the form of an identification code, which identifies the base station as the base station that operates in the environment with constraints on energy, and on this request, the mobile terminal is in a transmission mode with a low power, when the power level of the access request is above a predefined level.

15. A base station for operation in the environment with constraints on energy supply, and the base station includes:
the receiving device (12), configured to receive the access request from the mobile terminal;
processing device (7), arranged to determine the power level of the access request; and
the transmitting device (11), configured to send a request to the mobile terminal entering the transmission mode with a small m is Sestu, when the power level of the access request is above a predefined level, and identification code, and
when this processing device (7) is arranged to determine, identifies whether the at least one identification code special base station that operates in the environment with restrictions on supply.

16. Machine-readable media containing a portion of the executable computer program code for implementing the method according to any one of claims 1 to 8, when the said part of the executable computer program code executed by an electronic device having the functionality of a computer.

17. Machine-readable medium according to clause 16, and computer program product are contained on the recording medium or in the signal.

18. The machine-readable medium that contains portions of the executable computer program code for implementing the method according to 14, when the said part of the executable computer program code executed by an electronic device having the functionality of a computer.

19. Machine-readable media on p, which is a recording medium or a signal.



 

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17 cl, 18 dwg

FIELD: information technologies.

SUBSTANCE: in jointly used control channel of downlink the resources are distributed by means of distribution table, which is divided into the first section of constant length and at least one second section of variable length. Constant length and circuit of modulation and coding (MCS) of the first section are known in advance. The second variable length and circuit of MCS of the second section may be set in the first section. Noise immunity may be different for various second sections of one and the same table of distribution, or even inside a separate second section, in order to take into account various distance of subscribers from unit of network that performs distribution. Subscribers may be identified in the first section (for instance, constant number of subscribers) and/or in the second section (or additionally assigned subscribers, or all assigned subscribers, if the first section does not identify subscribers).

EFFECT: reliable acceptability of service information volume of jointly used control channel for common throughput capacity of downlink.

26 cl, 11 dwg

FIELD: radio engineering; construction of radio communication, radio navigation, and control systems using broadband signals.

SUBSTANCE: proposed device depends for its operation on comparison of read-out signal with two thresholds, probability of exceeding these thresholds being enhanced during search interval with the result that search is continued. This broadband signal search device has linear part 1, matched filter 2, clock generator 19, channel selection control unit 13, inverter 12, fourth adder 15, two detectors 8, 17, two threshold comparison units 9, 18, NOT gates 16, as well as AND gate 14. Matched filter has pre-filter 3, delay line 4, n attenuators, n phase shifters, and three adders 7, 10, 11.

EFFECT: enhanced noise immunity under structural noise impact.

1 cl, 3 dwg

FIELD: radio engineering for radio communications and radar systems.

SUBSTANCE: proposed automatically tunable band filter has series-connected limiting amplifier 1, tunable band filter 2 in the form of first series-tuned circuit with capacitor whose value varies depending on voltage applied to control input, first buffer amplifier 3, parametric correcting unit 4 in the form of second series-tuned circuit incorporating variable capacitor, second buffer amplifier 5, first differential unit 6, first amplitude detector 7, first integrating device 9, and subtraction unit 9. Inverting input of subtraction unit 9 is connected to reference-voltage generator 10 and output, to control input of variable capacitors 2 and 4. Automatically tunable band filter also has series-connected second amplitude detector 11, second integrating unit 12, and threshold unit 13. Synchronous operation of this filter during reception and processing of finite-length radio pulses is ensured by synchronizer 14 whose output is connected to units 10, 8, and 12. This automatically tunable band filter also has second differential unit whose input is connected to output of buffer amplifier 3 and output, to second control input of variable capacitor of band filter 2.

EFFECT: enhanced noise immunity due to maintaining device characteristics within wide frequency range.

1 cl, 1 dwg

FIELD: radio communications engineering; mobile ground- and satellite-based communication systems.

SUBSTANCE: proposed modulator that incorporates provision for operation in single-channel mode with selected frequency modulation index m = 0.5 or m = 1.5, or in dual-channel mode at minimal frequency shift and without open-phase fault has phase-shifting voltage analyzer 1, continuous periodic signal train and clock train shaping unit 2, control voltage shaping unit 3 for switch unit 3, switch unit 3, switch unit 4, two amplitude-phase modulators 5, 6, phase shifter 7, carrier oscillator 8, and adder 9.

EFFECT: enlarged functional capabilities.

1 cl, 15 dwg

FIELD: electronic engineering.

SUBSTANCE: device has data processing circuit, transmitter, commutation unit, endec, receiver, computation unit, and control unit.

EFFECT: high reliability in transmitting data via radio channel.

4 dwg

FIELD: electronic engineering.

SUBSTANCE: method involves building unipolar pulses on each current modulating continuous information signal reading of or on each pulse or some continuous pulse sequence of modulating continuous information code group. The number of pulses, their duration, amplitude and time relations are selected from permissible approximation error of given spectral value and formed sequence parameters are modulated.

EFFECT: reduced inetrsymbol interference; high data transmission speed.

16 cl, 8 dwg

FIELD: communication system transceivers.

SUBSTANCE: transceiver 80 has digital circuit 86 for converting modulating signals into intermediate-frequency ones. Signal source 114 transmits first periodic reference signal 112 at first frequency. Direct digital synthesizer 84 receives second periodic signal 102 at second frequency from first periodic reference signal. Converter circuit affording frequency increase in digital form functions to convert and raise frequency of modulating signals into intermediate-frequency digital signals using second periodic signal 102. Digital-to-analog converter 82 converts intermediate-frequency digital signals into intermediate-frequency analog signals using first periodic reference signal 112.

EFFECT: reduced power requirement at low noise characteristics.

45 cl, 3 dwg

FIELD: radio engineering; portable composite phase-keyed signal receivers.

SUBSTANCE: proposed receiver has multiplier 4, band filter 6, demodulator 8, weighting coefficient unit 5, adding unit 7, analyzing and control unit 10, synchronizing unit 3, n pseudorandom sequence generators 21 through 2n, decoder 1, and switch unit 9. Receiver also has narrow-band noise suppression unit made in the form of transversal filter. Novelty is that this unit is transferred to correlator reference signal channel, reference signal being stationary periodic signal acting in absence of noise and having unmodulated harmonic components that can be rejected by filters of simpler design than those used for rejecting frequency band of input signal and noise mixture. Group of synchronized pseudorandom sequence generators used instead of delay line does not need in-service tuning.

EFFECT: facilitated realization of narrow-band noise suppression unit; simplified design of rejection filters.

1 cl, 8 dwg

FIELD: mobile radio communication systems.

SUBSTANCE: proposed method and device are intended to control transmission power levels for plurality of various data streams transferred from at least one base station to mobile one in mobile radio communication system. First and second data streams are transmitted from base station and received by mobile station. Power-control instruction stream is generated in mobile station in compliance with first or second data stream received. Power control signal is shaped in mobile station from first power control instruction stream and transferred to base station. Received power control instruction stream is produced from power control signal received by base station; power transmission levels of first and second data streams coming from base station are controlled in compliance with power control instruction stream received. In this way control is effected of transmission power levels of first data stream transferred from each base station out of first active set to mobile station and of transmission power levels of second data stream which is transferred from each base station out of second active set to mobile station.

EFFECT: enlarged functional capabilities.

80 cl, 21 dwg

FIELD: radio engineering.

SUBSTANCE: proposed method and device designed for fast synchronization of signal in wade-band code-division multiple access (WCDMA) system involve use of accumulations of variable-length samples, testing of decoder estimates for reliability, and concurrent decoding of plurality of sync signals in PERCH channel. Receiver accumulates samples required for reliable estimation of time interval synchronization. As long as time interval synchronization estimates have not passed reliability tests, samples are accumulated for frame synchronization estimates. As long as frame synchronization estimates have not passed reliability tests, samples are analyzed to determine channel pilot signal shift.

EFFECT: reduced time for pulling into synchronism.

13 cl, 9 dwg

FIELD: satellite navigation systems and may be used at construction of imitators of signals of satellite navigational system GLONASS and pseudo-satellites.

SUBSTANCE: for this purpose two oscillators of a lettered frequency and of a fixed frequency are used. Mode includes successive fulfillment of the following operations - generation of a stabilized lettered frequency, its multiplication with an oscillator's fixed frequency and filtration of lateral multipliers with means of filters of L1 and L2 ranges and corresponding option of a fixed and a lettered frequencies.

EFFECT: reduces phase noise and ensures synthesizing of lettered frequencies of L1 and L2 ranges of satellite navigational system from one supporting generator at minimum number of analogous super high frequency units.

3 cl, 1 dwg

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