High-accuracy method with use of double label for moving targets position fixing in mine

FIELD: measuring equipment.

SUBSTANCE: high-accuracy position fixing method with the use of double label includes a method for locating a position fixing of an object of the first type in a mine and a method for position fixing of a moving object of the second type in a mine; the method includes the steps of: setting two position labels horizontally or vertically on a moving object and performing them to communicate with two base positioning stations installed along the roof timber and obtaining the location of the moving object in real time by constructing an optimisation function between the distance determined according to the received signal strength indicator and the estimated distance between the label and the base station of position fixing and searching for the minimum value; solving the optimisation function by an iterative process, including the step of determining the initial iteration value and the iteration step in the left/right direction. The method is applicable for determining the location of objects with a strip profile parallel to the digging face (for example, a mine trolley or a cutter) or objects with a strip profile perpendicular to the digging face (for example, a working).

EFFECT: improved accuracy of position fixing of a moving object in the mine.

2 cl, 2 dwg

 



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: method comprises processing received pulsed signals, calculating decision threshold values and setting said values in threshold devices of detection channels; setting up two detection channels to process the received signals - an optimum channel and a median filtering channel, operating independent of each other; in the optimum channel, averaging incoming reports of received signals, and in the median filtering channel, processing said reports with a median filter; further, for each detection channel, calculating the difference in reports and comparing said difference with the decision threshold value; using a constant as a decision threshold value for the optimum channel, said constant being defined empirically and depending on the slope of the fronts of the detected pulsed signals, and for the median filtering channel - a variable which depends on the noise level (noise dispersion) in the channels; making a decision on presence or absence of signals, wherein each of the received signals is considered detected if it is detected in both detection channels.

EFFECT: improved detection characteristics of secondary radar system signals with low signal-to-noise ratio while maintaining measurement accuracy of parameters thereof.

2 dwg

FIELD: radio, communication.

SUBSTANCE: device comprises two quadrature phase detectors, a cosine-sine generator, four integrators, three square-law detectors, an adder, a threshold unit, three units of subtraction, two multipliers interconnected in a certain manner.

EFFECT: reduction of threshold signal-to-noise ratio at the input of the threshold unit of the panoramic receiver detector which determines its sensitivity at given values of probability of detection and false alarm, which corresponds to an increase in the detection range of the radio-frequency radiation source and reduction of analysis time of electronic environment in a given analyzed frequency band for the a priori unknown crowding of the RFS frequency band.

3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method includes detecting signals from nonsynchronous pulse interference (NPI) at the inter-period processing level and replacing the detected signals from NPI with values correlated with signals from local objects in each quadrature component with subsequent implementation of inter-period and intra-period accumulation. NPI is detected using a signal from the output of a phase detector. This provides protection from NPI with negligible sensitivity losses since detection of NPI is performed before coherent intra- and inter-period accumulation, and also provides protection from NPI against the background of signals from local objects since subtraction of signals from said objects from the signal from the output of the phase detector is now possible.

EFFECT: reduced loss of sensitivity of a detection channel in conditions with multiple NPI and crosstalk.

2 cl, 6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention is aimed at detecting quasideterministic harmonic signals with unknown parameters and a known envelope on a background of noise with an unknown distribution function. The detector is adaptive, enables to stabilise the false alarm level and takes into account phase-frequency characteristics of received realisations, which is the technical result achieved.

EFFECT: minimising the number of estimated parameters, which enables operation in conditions of short intervals of space-time homogeneity.

1 dwg

FIELD: physics.

SUBSTANCE: described is a method of extracting an echo signal (109, S1, max1, max2, max3, e1, e2) from an echo signal function (100, 500, 2900, 4900). The method involves receiving an echo signal function (100, 500, 2900) and breaking down the echo signal function into at least one refinement function (D1, D2, D3, D4, D5, D6, D7, D8, D9), wherein at least one refinement function (D1, D2, D3, D4, D5, D6, D7, D8, D9) contains a plurality of first coefficients (2902). Each of the at least one refinement functions (D1, D2, D3, D4, D5, D6, D7, D8, D9) represents a different degree of refinement of the echo signal function (100, 500, 2900), wherein the degree of refinement relates to the form of the basic function (700, 900, 1000, 1100, 1200, 1805, 2600, 2700, 3501, 3506). The method also involves exclusion of at least one of the plurality of first coefficients (2902) and use of ordering or a reconstruction scheme, which depends on the form of the basic function, to generate a smoothed echo signal function (2901). Further, at least one echo signal (109, S1, max1, max2, tax3, e1, e2) is determined from the smoothed echo signal function (2901).

EFFECT: high accuracy of measuring echo signals.

13 cl, 72 dwg

FIELD: physics.

SUBSTANCE: method of measuring parameters of the pulse characteristic of a propagation channel in the presence of radiators and reflectors, fixed or mobile, is meant for detecting and determining parameters of the position and kinematics of these radiators and reflectors, or for automatic determination of the location of a receiving system when implementing the present invention, wherein the system has N sensitive elements which receive signals from said radiators or reflection from said reflectors, wherein the method comprises at least the following steps: determining an uncertainty function which indicates spatial analysis and delay-range/Doppler-kinematic analysis, determining at least one sufficient statistic corresponding to correlation between a known signal, which corresponds to the complex envelope of the emitted signal, and a filter output w(l, m), where l is a time-domain assumption and m is a frequency-domain assumption, determining values of pairs (l, m) by comparing the statistic value for pairs (l, m) with a threshold value.

EFFECT: high efficiency of determining the pulse characteristic of electromagnetic or acoustic wave propagation channels.

18 cl, 4 dwg

FIELD: physics.

SUBSTANCE: detection is carried out by means of scanner transmitter and receiver and transponder. Scanner transmitter comprises master oscillator, modulation code generator, phase manipulator, power amplifier and transmitting antenna. Scanner receiver comprises measuring and four identical direction-finding channels. Besides, scanner incorporates correlator, multiplier, controlled delay unit, low-pass filter, extreme controller, range indicator and recorder unit. Transponder incorporates micro strip antenna, piezo crystal, electrodes, buses and reflectors. All said devices are interconnected.

EFFECT: expanded performances, higher validity.

3 dwg

FIELD: physics.

SUBSTANCE: main detection channel is formed, comprising matched filtration of a signal with threshold decision making on its presence or absence according to a selected criterion. Two additional detection channels are formed, in which time instants τi, i=1,2 for reference readings are determined from the initial signal S(t) and the given model of frequency-selective distortions H(ω,t). Total values of the residual signal and noise Usni) at the output of the matched filter are measured in these readings and correlation coefficients r(τi) thereof are calculated. For known power of output noise Pn of the matched filter and given false alarm probability Pf, the decision threshold values are calculated using the formula where Φ-1(·) is a function which is inverse to the probability interval. Said threshold values are set in additional detection channels. The resultant decision on the presence or absence of a signal is taken based on partial decisions on the main and additional channels according to the rule: a signal is detected if it is recorded in at least one of the partial channels.

EFFECT: high reliability of detecting a pulsed signal on the background of white noise under conditions of frequency-selective distortions with invariable energy and frequency-time resources of the communication channel.

2 dwg

FIELD: physics.

SUBSTANCE: system has a scanning device and a transponder mounted on the vessel in distress. The scanning device has a driving generator (1), a modulation code generator (2), a phase shift keying device (3), a power amplifier (4), reception antennae (12), (13), (14), (15), (16), an intermediate frequency amplifier (24), spectrum analysers (25) and (27), a phase doubler (26), a comparator unit (28), a switch (29), a phase halver (30), a narrow bandpass filter (31), a phase detector (32), multipliers (33)-(36), narrow bandpass filters (37)-(40), phase meters (41)-(44), subtracters (45) and (46), adders (47) and (48), a detection unit (49), a duplexer (50), a correlator (51), a multiplier (52), a low-pass filter (53), an optimal control (54), a controlled delay unit (55), a range indicator (56), a frequency detector (57), a flip flop (58) and a dual balance switch (59). The transponder has a piezoelectric crystal (6), a microstrip transceiving antenna (7), electrodes (8), buses (9) and (10) and reflectors (11).

EFFECT: broader functional capabilities of the known method through determination of range to the vessel in distress, more reliable determination of the identification number the vessel in distress due to elimination of the sign ambiguity phenomenon.

4 dwg

FIELD: radio engineering.

SUBSTANCE: device comprises storage device (SD) of input signal, inlet of which is device inlet, multiplying unit, inlets of which are connected to outlets of input signal SD, summator, inlets of which are connected to outlets of multiplying unit, unit of adaptation and direct signal SD. At the same time inlet of adaptation unit is the second inlet of device, the first outlet is connected to the second inlet of input signal SD, the second outlet is connected to the first inlet of direct signal SD, the third outlet is connected to the second inlet of direct signal SD, outlets of direct signal SD are connected to the second inlets of multiplying unit.

EFFECT: expansion of functional resources due to adaptation to variation of parametres and type of reference transmitter signals modulation.

2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to controlling interference in wireless communication networks and more specifically to supporting signalling, associated with the jamming of reference signals (RS) to reduce interference in wireless communication networks which transmit reference signals, e.g., for location measurement. The present invention provides a jamming scheme for reference signal transmissions in the form of an algorithm defined by at least a combination of a jamming sequence and a reference point. Jamming events for a given cell (20) of a wireless communication network are therefore distinguished from another cell by using another jamming sequence, another reference point or both Furthermore, the present invention provides use of a common jamming sequence or reference point on all cells (20), wherein jamming events are distinguished between cells (20) by using different reference points (in case of a common jamming sequence) or using different jamming sequences (in case of a common reference point) or different sequences and different reference points.

EFFECT: easy signalling, which is required to control or denote a jamming scheme used in cells of interest, providing a preferred base for distributing jamming schemes among cells (20), avoiding the need for predefined jamming schemes and the need for blind detection of jamming with wireless communication devices (14), such as UE.

42 cl, 13 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to mobile communication. A user terminal generates position information of the user terminal, generates target recognition information, communicates with a counterpart terminal, and determines whether the target recognition information conforms with first reference information. If the target recognition information matches the first reference information, the user terminal transmits the target recognition information and the position information to the counterpart terminal.

EFFECT: providing a user terminal with information which enables to determine a route to a target.

8 cl, 18 dwg

FIELD: instrumentation.

SUBSTANCE: additional modulators, summation unit and demodulator are used. Additional modulation of the signal from each element of antenna array is made by own code modulation sequence, and formation in summation unit of the single, group signal is made, the signal is processed in single receiving channel, this excludes errors due to non-identity during use of several receiving channels and several analogue-digital converters. Group signal division to signal from each of N elements of the antenna array is made at low frequency during digital processing in the demodulator. The received signals are analysed for interferences and their exclusion from the group signal by forming the minimum sensitivity of the direction pattern of the antenna array in the direction of interferences reception.

EFFECT: increased accuracy of determination of space orientation of the object by means of use of the full signal energy from each of N elements of the antenna array within entire measuring range due to creation of the single group signal.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method is carried out using novel operations for useful radio signal feedback adaptive processing, which increase sensitivity and the dynamic range when forming horizontal and vertical polarisation components of a two-component complex frequency-time image of radio signals scattered by objects in the analysed region of Doppler frequencies and time delays.

EFFECT: high probability of detecting remote and weakly scattering objects.

3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication networks. A base station transmits a positioning reference signal (PRS) to wireless communication devices over a downlink in a wireless communication system by encoding a PRS into a first set of transmission resources, encoding other information into a second set of transmission resources, multiplexing the two sets of resources into a subframe such that the first set of resources is multiplexed into at least a portion of a first set of orthogonal frequency division multiplexed (OFDM) symbols based on an identifier associated with the base station and the second set of resources is multiplexed into a second set of OFDM symbols. Upon receiving the subframe, a wireless communication device determines which set of transmission resources contains the PRS based on the identifier associated with the base station that transmitted the subframe and processes the set of resources containing the PRS to estimate timing information, e.g. time of arrival.

EFFECT: preventing loss of orthogonality in subcarrier transmissions.

11 cl, 14 dwg, 1 tbl

FIELD: physics, navigation.

SUBSTANCE: invention relates to supporting location relating to a mobile station. A secure user plane location (SUPL) server of a location system determines which of two communication networks is accessed by a mobile station based on information indicating an access point of the mobile station, wherein said access point communicates with the mobile station, which then enables to transmit information from the SUPL server to a location information management device. As a result, the location information management device terminates requests to the communication network the mobile station has not accessed with respect to location information for use when locating the mobile station.

EFFECT: more effective support of location relating to a mobile station which is capable of using multiple communication networks.

4 cl, 8 dwg

FIELD: physics.

SUBSTANCE: method includes selecting, on a reference map, a measurement area with a reference object (RO), plane coordinates and spatial parameters of which are known with the highest accuracy; obtaining a first current map of the RO when moving objects move over the measurement area, which is converted to a digital image of the current map of the RO; recognising the RO, determining the location and spatial parameters thereof; comparing the reference and first current map of the RO by superimposing; determining a first location of the moving object in plane coordinates of the reference map; determining a second location of the moving object in plane coordinates of the reference map; determining the height of the moving object over the reference map by determining mutual displacement over a time Δt of the first and second locations of the moving object in pixels of the digital image of the current map of the reference object in the direction of movement of the moving object. A database installed on the moving object is used to this end. A signal for correcting the position of the moving object is calculated, said signal being used to control movement of the moving object by correcting the location of said object to facilitate navigation.

EFFECT: enabling determination of the height of a moving object.

10 dwg

FIELD: radio, communication.

SUBSTANCE: method of increasing accuracy of aircraft navigation consists in multipath measurements of the integral parameters of reflected signals using radio waves emitted in the form of rays, and determining the resulting vector of angular oscillations of aircrafts, which characterizes the angular oscillations of aircrafts in roll and in pitch based on the analysis of integral parameters of the reflected signals. Analysis of the integral parameters of the reflected pulses of multipath measurements is based on comparison of the integral parameters of the reflected pulses on the lateral rays of the multipath measurements over the flat area of the area surface. The rays of the multipath measurements are located in two orthogonal planes, one of which coincides with the direction of movement of the aircraft, the other plane of the rays is perpendicular to the aircraft direction of movement. The resulting vector of angular oscillations of the aircraft in the bound coordinate system of the aircraft is determined sequentially at regular intervals to detect changes in angular oscillations in pitch and in roll of the aircraft during its movement.

EFFECT: improving accuracy of aircraft navigation by analyzing the parameters of the reflected pulses obtained by multipath measurements over the flat surface, and to determine the resulting vector of angular oscillations of aircrafts, which characterizes the total angle of deflection in pitch and in roll of aircrafts to control their movements.

2 cl, 7 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication equipment and can be used in mobile communication systems. Stationary beacons consisting of several transmitters and one receiver serving for synchronisation of transmitters are used. Transmitters and the receiver contained in the beacon are synchronised with a common clock generator, and their position is fixed by means of radio transparent beacon housing. As navigation noise-like signals, GLONASS-type signal is used, the beginning of M-sequence of which for different signals transmitted on one and the same carrying frequency, is shifted as to delay by different values. Before the position is calculated, information on expected shift of M-sequence and other information is loaded to mobile terminal memory. Signals of transmitters are accompanied in the mobile terminal, angles of radiation of signals sent by transmitters tuned to one and the same carrier frequency, as well as pseudo-distances to all transmitters are determined, and the position is calculated.

EFFECT: improvement of accuracy and reliability of positioning inside buildings, which allows for arrangement inside rooms of a large number of positioning transmitting devices, requires no major changes to satellite navigational receivers or other components contained in mobile devices, such as for example a smart phone, as well as in non-admission of disturbances to existing navigation receivers.

19 cl, 7 dwg

FIELD: transport.

SUBSTANCE: invention relates to aircraft engineering and can be used for search of flight recorder after incident. Flight recorder (2) comprises sound and electromagnetic wave generator unit (5), power supply (6), changeover lever (7), compressed air chamber (8), rubber chamber (9), parachute (11), flexible antenna (12), recess (13), sound radiator (14), cable (15), connector (16), plug, socket, sling, valve handle and air duct pipes. It incorporates GPS-receiver and control station. GPS-receiver comprises transceiver antenna, duplexer, phase doubler, first and second narrow-band filters, phase halver, phase detector and computer. Electromagnetic wave generator comprises modulation code shaper, delay line, pseudorandom sequence generator, adder, phase manipulator and power amplifier. Control station comprises receiving antenna, HF amplifier, search unit, local oscillator, mixer, intermediate frequency amplifier, signal detector, first and second spectrum analyzers, phase doubler, comparator, threshold unit, delay line, switch, phase halver, narrow-band filter, phase detector and registration unit.

EFFECT: accelerated search.

8 dwg

FIELD: transport.

SUBSTANCE: set of invention relates to aircraft protection means. In compliance with first process, unfolding instruction is generated at equality in duration of second interval and half the second interval duration between detection of definite frequency signals when definite spacing occurs between drone antenna and approaching missile. In compliance with second and third methods, generated is the instruction for unfolding at equality of duration of two time intervals between detection of definite frequency signals when at definite spacing between antenna and approaching missile. First drone simulator unfolding instruction generation radar comprises locator of instruction output moment, two generators of count pulses, reversing counter, memory unit, PROM, digital computer, AND element, two continuous frequent generators connected in a definite manner. Second drone simulator unfolding instruction generation radar comprises locator of instruction output moment, shift register, count pulse generator, reversing counter, OR-NO element, AND element, analogue switch, two continuous frequency generators connected in a definite manner.

EFFECT: drone with two radars, miniature parachute, telescopic antenna with charge detonator.

6 cl, 4 dwg

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