Method for determining location of a quasi-continuous broadband source of radio-emission by mobile complex of radio-technical supervision

FIELD: radio engineering and communication.

SUBSTANCE: invention relates to radio engineering and can be used in the development of multi-position complexes of radio technical supervision. Method consists in: receiving a quasi-continuous broadband signal by antenna array at each receiving position of the radio technical supervision complex, forming intervals of observation with duration tsup., on which the correlation matrix of signals Rxx(m) of the input realization of a quasi-continuous wideband signal is calculated according to a certain formula, calculating a difference correlation matrix of signals ΔRxx(m) = Rxx(m)-Rxx(m+l), calculating the determinant of the difference correlation matrix with the subsequent formation and normalization of dependence for constructing position lines; calculating the correlation function of dependence by the corresponding formula, determining the path difference for each position with respect to the maximum of the enveloping mutual correlation function by the system of mutual correlation processing, estimating the coordinates of the source of quasi-continuous broadband signal by the time difference method on the basis of analysis of the time dependence of the determinant of the difference-correlation matrixes of the signals generated in the elements of the antenna arrays at receiving points of the radio technical supervision complex.

EFFECT: achieved technical result of the invention consists in improved accuracy of positioning the sources of a quasi-continuous wideband signal by a complex of radio-technical supervision and reduced time required to locate sources of radio emission.

1 cl, 5 dwg

 



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: detector comprises a main detection channel, an additional detection channel and a subtractor unit, as well as a register for storing given signal detection probability values, a unit for calculating a lower detection threshold level, a register for storing a confidence coefficient, a unit for calculating an upper detection threshold level, a switch, an additional threshold device which is the output of the device, a display and a programmable interface, wherein the main detection channel includes two quadrature phase detectors, a cosine-sine generator, two integrators, two square-law detectors, an adder and a threshold device; the additional detection channel includes a third square-law detector and a third integrator. The listed devices are connected to each other in a certain manner and a binary level of an additive mixture of the signal and noise in form of digital readings is transmitted to the combined inputs of the main and additional detection channels, which are the input of the device.

EFFECT: fewer false alarms at the output of a digital panoramic detector.

2 dwg

The invention relates to the field of radar technology, in particular to the field of electronic indicator device overview radar (radar)

Radio system // 2543470

FIELD: radio engineering, communication.

SUBSTANCE: radio system (RS) comprises a ground radio signal transmitting system with N≥5 radio signal transmitting stations, coordinates of phase centres of antennae of which are known at radio facilities (RO). The transmitting stations are configured for synchronised ordered transmission of radio signals in series, with given separate features and with given time delays between radio signals, which provide ordered arrival of radio signals at the RO, located at any point in a service area. Each RO comprises a radio signal receiving device configured to receive and identify radio signals of the corresponding transmitting station, a recorder for recording the reception time thereof in a time reference system specified at the RO and an information system configured, based on said coordinates and reception time of radio signals in the series, taking into account said time delays between radio signals, to measure coordinates of phase centres of the antenna of the RO according to the proposed measurement equations.

EFFECT: high efficiency and simplification of corresponding radio systems.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention can be used to determine spatial coordinates of a stationary or mobile radio signal receiving radio facility (RO). Radio signals with given separate features and with given time delays between radio signals, which provide ordered arrival of radio signals at a RO, which is located at any point of the service area and known at the RO, are transmitted in series from N≥5 seriously numbered radio signal transmitting stations of a ground radio signal transmitting system, coordinates of phase centres of antennae of which are known at the RO, and the reception time of said signals is recorded in a time reference system specified at the RO. At the RO, coordinates of the phase centre of the antenna of the RO are measured according to proposed measurement equations based on said coordinates and reception time of identified corresponding stations of the ground radio signal transmitting system in a series, based on said given time delays between radio signals.

EFFECT: high efficiency and simplification of corresponding radio systems.

Radio system // 2542579

FIELD: radio engineering, communication.

SUBSTANCE: invention can be used to determine spatial coordinates of a stationary or mobile radio signal receiving radio facility (RO). A radio system (RS) comprises a ground radio signal transmitting system with N≥5 radio signal transmitting stations, coordinates of phase centres of antennae of which are known at the RO. The transmitting stations are configured for synchronised ordered transmission of radio signals in series, with given separate features and with given time delays between radio signals, which provide ordered arrival of radio signals at the RO, located at any point in a service area. Each RO comprises a radio signal receiving device configured to receive and identify radio signals of the corresponding transmitting station, a recorder for recording the reception time thereof in a time reference system specified at the RO and an information system configured, based on said coordinates and reception time of radio signals in the series, taking into account said time delays between radio signals, to measure coordinates of phase centres of the antenna of the RO according to the proposed measurement equations.

EFFECT: higher efficiency and simplification of corresponding radio systems.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used to determine spatial coordinates of a fixed or mobile radio facility (RO) receiving radio signals. The technical result is high efficiency and simplification of corresponding radio systems. A driving RO transmits radio signals with given individual characteristics. The radio signals are received by serially numbered driven RO. The time of reception is recorded and radio signals with individual features given for each driven RO are emitted after a delay time given individually for each driven RO. A receiving RO receives radio signals of the driving and driven RO, generates a series from the plurality thereof and, based on the given coordinates of phase centres of antennae thereof and time of reception of radio signals taking into account overall delay time, coordinates of the phase centre of the antenna of the receiving RO are determined.

EFFECT: method does not require overall synchronisation of the plurality of radio facilities transmitting and receiving radio signals.

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used to determine spatial coordinates of a fixed or mobile radio facility (RO) receiving radio signals. The technical result is high efficiency and simplification of corresponding radio systems. A driving RO transmits radio signals with given individual characteristics. The radio signals are received by serially numbered driven RO. The time of reception is recorded and radio signals identical to radio signals of the driving RO are emitted after a delay time given individually for each driven RO. A receiving RO receives radio signals of the driving and driven RO, generates a series from the plurality thereof and, based on the given coordinates of phase centres of antennae thereof and time of reception of radio signals taking into account overall delay time, coordinates of the phase centre of the antenna of the receiving RO are determined.

EFFECT: method does not require overall synchronisation of the plurality of radio facilities transmitting and receiving radio signals.

FIELD: radio engineering.

SUBSTANCE: array of aircraft condition vectors are expanded, estimate values of air speeds are defined for corresponding values of aircraft condition vector, varying estimate values of wind speed and wind direction, quality of decision made on wind parametres is assessed, results of calculations are compared with the threshold value, which defines a priori specified accuracy of wind parametres evaluation, when threshold conditions are met during the next iteration, the wind parametres are values corresponding to these conditions, and based on navigation triangle of speeds they calculate values of air speed and course angle, found parametres of wind are used in the next cycle of measurements as average values of limited sample of estimated wind parametres.

EFFECT: expansion of its application field due to more complete accounting of aircraft flight parametres under conditions of destabilising factors effect, for instance wind.

10 dwg

FIELD: radio engineering.

SUBSTANCE: method can be used for high precision measurement of coordinates of radio-frequency radiation sources which radiate continuous or quazi-continuous signals by means of flying vehicles. Method is based upon reception of signals from radio-frequency radiation sources at three flying vehicles, re-translation of signals to central processing board and calculation of coordinates of radio-frequency radiation sources from difference in radial velocities of flying vehicles. Signals being re-translated from flying vehicles are subject to additional mutual correlation processing. Difference in radial velocities is calculated on the base of measurement of compression factors determined by maximizing of mutual correlation function of signals re-translated from flying vehicles. Coordinates of radio-frequency radiation sources radiating wideband signals is provided.

EFFECT: widened functional capabilities.

The invention relates to radar systems and can be used in ground-based and airborne radar mode passive detection and measurement of coordinates of the non-emitting targets

FIELD: radio engineering, communication.

SUBSTANCE: electronic surveillance system calculates estimates X^j,i(k) of status coordinates of detected and tracked radio-frequency sources, based on which results of measuring coordinates Xin,i(k), obtained at the k-th moment in time, are identified with the corresponding radio-frequency sources, wherein for each status coordinate of each detected and tracked radio-frequency source, the method includes determining an interval of values which depends on variance of measurement of Xin,i(k), the variance of the rate of measuring status coordinates X˙j,i(k), as well as the coefficient of proportionality K, the value of which is selected in the range of 1 to 2. The set of intervals on all status coordinates of each radio-frequency source forms a multidimensional gate, where if the measurement result of the status vector Xin(k) at the k-th moment in time falls in said gate, the result is identified with, for example, a specific radio-frequency source. If the measured vector Xin(k) does not fall within any of the gates of the j-th radio-frequency source, where j=1,N¯, a new radio-frequency source with an index N+1 is detected.

EFFECT: high reliability of identifying signals in a multi-target environment.

2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention presents a method, a device and computer program product for clocking using the relative behaviour of clocks of individual receiving stations as well as corresponding modelling to derive a time difference of arrival of a signal from a user device which can be used to correct the time difference of arrival based on the modelled clock behaviour and leads to a correct clocking of received user signals, which is applicable to a plurality of pairs of receiving stations and transmitted beacon signals and allows to correct location estimation of a user device.

EFFECT: enabling estimation of the location of a mobile device without the need to synchronise clocks at different receiving stations.

15 cl, 6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: system includes receiving stations (4) for receiving signals transmitted from the spacecraft (6) and a processing station (2) for receiving data from the receiving stations (4), where each receiving station (4) records, during a recording window (8), signals transmitted from the spacecraft (6) and transmits, to the processing station (2), data representing the recorded signals. The recording windows (8) associated with each of the receiving stations (4) are offset and/or have different size with respect to each other. The processing station (2) correlates the recorded signals to estimate the distance difference between the spacecraft (6) and each of a plurality of receiving stations and to estimate the spacecraft (6) position.

EFFECT: avoiding the need to send a reference signal pattern, emission by the spacecraft of any trigger sequence and the need to adapt the spacecraft, and improved estimation of the position of the spacecraft.

22 cl, 10 dwg, 1 tbl

FIELD: radio engineering, communication.

SUBSTANCE: method and system for determining the position of a signal transmitter from the signal arrival time employ separate processing of a signal received by multiple antennae and receiving channels, waiting for characteristic points of the received signal, measuring the time of arrival of characteristic points of the received signal, summation with accumulation to determine the average arithmetic of measured values of the time of arrival of characteristic points of the received signal and calculating the position of the signal transmitter using the average arithmetic of the measured values of the time of arrival of the characteristic points of the received signal as the time of arrival of the signal.

EFFECT: high accuracy and longer range for determining position of a signal transmitter.

3 cl, 4 dwg

FIELD: radio engineering.

SUBSTANCE: measuring base implements the removal of signal amplitudes proportional to the field intensity, as per which the main lobe of antenna beam of radiation sources is restored in linear measure. Determination of the distance to radiation sources is achieved by means of calculation of the ratio of calculated width of radiation source antenna beam in linear units to the width value of antenna beam, which is taken from database, in angular radian measure.

EFFECT: possibility of passive determination of the distance to radiation sources with directional antenna oriented with its main lobe to direction finder antenna; the latter forms together with antennae of additional receiving stations the measuring base the size of which is much smaller than that during implementation of the known time-difference direction determining method, which in its turn allows eliminating communication channels for transfer of received signals to distance calculation station, and as a whole, applying the method on movable direction finder carrying object.

5 dwg

FIELD: physics, measurement.

SUBSTANCE: invention is related to the field of passive radio location and is intended for performance of full-scale tests of pilot samples of passive range-difference system (RDS) in case of absence of one of receiving posts. Substance of suggested method consists in the fact that mutual-correlation measurement of RRS signals time delays received by master and slave receiving posts, and missing slave receiving post is additionally imitated by definition of its location coordinates, which is symmetrical to location of slave receiving post relative to the line "master receiving post - RRS", and as RRS signal received by imitated slave receiving post, signal is used from existing slave receiving post, and then RRS location is defined by full-scale test method.

EFFECT: provides for possibility to evaluate accuracy in detection of radio-wave radiation source (RRS) location by passive RDS in case of one receiving posts in not available in its composition.

2 dwg

FIELD: radar-location.

SUBSTANCE: invention relates to methods and a device for establishing location of a receiver using GPS signals. The invention employs signals of GPS transmitters, which comprise a unique periodically recurring pseudonoise (PN) sequence. The invention is especially useful in non-synchronised systems, for example A-GPS, used in GSM and UMTS systems for mobile telephones. A received signal is stored in a receiver for at least two repetition periods of the PN sequence. A fast Fourier transformation operation is done (FFT), and frequency samples of data are obtained, which are curtailed in response to a hypothetical residual frequency. This cuts the number of the next required calculations and processing time. Correlation series are determined from the curtailed samples and reference frequency samples of the corresponding hypothetical transmission. If conformity is detected, the displacement of code shift is determined. Otherwise the process is repeated with another hypothetical residual frequency. Several similar obtained correlation series can be joined incoherently.

EFFECT: device and method of detecting GPS signals.

25 cl, 13 dwg

The invention relates to electrical engineering and can be used in communication systems to compensate for the delays of the signals received in the radio positioning

The invention relates to electrical engineering and can be used in systems for remote control of nuclear and other explosions, warning of missile launches, monitoring seismic activity
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