Method for tracking of delay of range finder code fronts of navigational satellite signals
FIELD: devices used in satellite radio navigation.
SUBSTANCE: the claimed method uses the operation of linear interpolation of two adjacent numbered readouts of the input signal embracing the forecast moment of the next change of the code symbol, the obtained value of the interpolated ordinate is normalized to the estimate of the useful signal amplitude, multiplied by the Gaussian prior probability, and an error signal is obtained according to the criterion of the maximum of the posterior probability density.
EFFECT: enhanced accuracy of tracking of delay of range finder code fronts of navigational satellite signals with the aid of a theoretically optimal delay discriminator insensitive to the multipath propagation in a digital receiver, multiprogram one inclusive, as well as eliminated uncertainty in the method of interpolation of numbered ordinates of the mixture of the signal with noise by the moment of the forecast delay, eliminated uncertainty in the method of formation of the delay from the prehistory to the current moment of estimation.
The invention relates to devices used in satellite navigation.
Widespread way of tracking code tracking systems delay (SWD) (see, for example ), which actually tracked the temporal position of the center of gravity of the shape under the curve vzaimoobraschennost functions (MCFs). Here calculate its values at three points as the convolution integrals in-phase component of the input signal (I) with advanced (early), nominal (prompt and delayed (late) replicas of the expected code.
The discriminator such CVD generates the error signal in the form
However, such a discriminator is not responding to any optimality criteria and is in fact purely heuristic solution. This fact in relation to the receivers, navigation equipment (EmOC) satellite navigation systems (SNS) was first reported in 1995 Ehekirchen , but, although he stated that the optimal (according to theory of statistical radio engineering) discriminator GCC should generate a convolution of the signal with the derivative of a replica at the estimated parameter, proposals for the implementation of such a discriminator he has not led.
The author of this invention Useduring in 1996  proposed a variant implementation of such a theoretically optimal discriminator delay (TODS). However, the proposed implementation conditions which replaces the hardware receiver - you need a separate (for each of the parallel channels tracking satellites) analog generator clock frequency code, voltage controlled (VCO)and a digital to analogue Converter code delay generated in digital circuits SWD in the control voltage (continuous argument δ-functions for these GUNAS). The requirement for formation of continuous arguments ϕfunctions as derivatives of the expected code for fixing ordinate (in analog form) of the envelope of the signal leads to the aforementioned complications receiver. In these ordinates degenerate integrals of convolution of the input signal with δ-functions.
These complicating the implementation COZ when not obvious at the time of its advantages  suspended further work in the field TODS.
Only in 2004 was the result (simulation model) , showing immunity TODS to the reflections (insensitive to multipath) and the possibility of its realization in digital receivers (including software) with discrete time digitized signals.
This insensitivity is due to the fact that TODS implements the tracking is not the center of gravity of the MCFs, a figure which distort the reflected signals (especially its anterior slope), and the fronts of code symbols, the position of which on the time axis does not move reflected signal is crystals. In more detail this method of tracking delay fronts code and all of its properties are given in , which we will adopt for the prototype.
In accordance with the prototype method for tracking a delay of fronts ranging code signals of navigation satellites includes the steps of forming the digitized samples of the input signal mixture noise prediction delay from the time of the original assessment by the time the next expected change of code symbols, the interpolation of the ordinate of the input signal by the time the next change of code symbols used ordinate this as an error signal, and smoothing it in a closed tracking the delay in the circuit. In the model, which were the results of work , was used spline approximation.
In this paper we present the 2nd version TODS, in which the replacement of variable in the integral convolution of the estimated parameter - delay τ - changed argument replicas in the argument of the signal S(t-τ). To implement this version COZ derivative τ from the replica, and from the signal itself. When it δfunction formed at the transition point of the code symbols in the envelope of the input signal.
Implementation of the 2nd version TODS would require the use of analog differentiating RC-chains of the signal envelope, which is usually formed in the digital part of the receiver; the. many of the outputs from the chip hardware digital receiver and inputs in the analog differentiation on the RC-circuit. Alternative high clock frequency multi-bit digitizing of analog signals with the formation of the increments of the envelope in the digital receiver (including software) and highlight those that are the same in sign of the derivative of the expected code and similar in magnitude to twice the amplitude of the useful signal. This option was used in the simulation model . In terms of nature, frequency multibit (at least 8) digitizing must be hundreds of MHz, which is quite difficult to implement. The increase in the frequency of digitization allows you to more reliably capture the true race of the increments on the fronts of the change of code symbols. But there may be false positives. For their suppression in the second version TODS applied the criterion of maximum a posteriori probability density (mapw) instead of the criterion of maximum likelihood (MP), which is responsible interpolated ordinate signal in the first version.
For formation evaluation delay criterion maps used Gaussian a priori probability density (GAPW). As the mathematical expectation GAPS used the forecast delay from prehistory to the current point of evaluation, and the variance was estimated by the conventional method and the deviation of these delays from the smoothing of the trend. The simulation results showed a significant increase in the accuracy of the second version TODS through the application of criterion maps compared with the first, where they used the MP criterion.
In addition, in the prototype (simulation method) signal amplitude was taken equal to 1. In real receivers it is changing in a fairly wide range, and to correct signal errors in the first version of the method should be supplemented by the operation of normalizing the digitized samples of the signal by the amount of the assessment of the current amplitude (in the second version of the signal amplitude was taken into account in the selection of the increments).
The disadvantages of the prototype the following:
1 - the uncertainty in the interpolation method digitized ordinate mixture signal with noise to the predicted time delay;
2 - uncertainty in the method of forming the delay from prehistory to the current point of evaluation;
3 - lower the accuracy easy to implement the first version of the method in comparison with the second, but more complicated;
4 - no rating operations interpolated ordinate required for correct signal errors.
The primary object of the present invention is to eliminate these disadvantages of the prototype in the way of tracking delayed fronts ranging code signals of navigation satellites with the consequences of the overall implementation TODS, insensitive to multipath in a digital receiver (including software).
This task is solved in that a method of tracking delay fronts ranging code signals of navigation satellites, including the operations of forming the digitized samples of the input signal mixture noise prediction delay from the time of the original assessment by the time the next expected change of code symbols, the interpolation of the ordinate of the input signal by the time the next shift code symbols, you can use this output as the error signal and smoothing it in a closed tracking delay in the loop is entered, the operation of the linear interpolation of two adjacent digitized samples of the input signal, covering the predicted time of the next change of the character code, and the obtained value is interpolated ordinate normalized to the amplitude estimation of the useful signal, multiplied by a Gaussian a priori probability density (GAPW) and receive the error signal according to the criterion of maximum a posteriori probability density (mapw), the mathematical expectation GAPS get the forecast delay using the phase shift of the carrier by the time the expected change of the character code, and the dispersion receive as recurrently smoothed her assessment of the historical process tracking delay.
In the invention features the use of the work as the basis for a more simple implementation - the first version TODS, but to improve its accuracy due to the formation of the error signal according to the criterion maps. This prompted the error signal obtained in the first version TODS as interpolated normalized value of the ordinate of the input signal that meets the criteria MP, again multiply GAPS used in the second version TODS.
Recent studies have shown that the implementation of the MP evaluation of the error signal enough linear interpolation between two adjacent samples of the signal, covering the predicted delay to the time of this delay.
To address the first of these disadvantages of the prototype features such linear interpolation.
To address the second disadvantage of the prototype is proposed to form the prediction of the delay at the time of the next evaluation (expected change character code) by adding the increment of the distance obtained in the tracking system carrier (SSN) as the phase shift from the previous estimate of the delay code to the time of the next expected, multiplied by the length of the radio waves.
The solution of the third disadvantage of the above - criterion maps in the first version TODS instead of the MP criterion.
As the mathematical expectation GAPS encouraged to use the forecast delay as described above (to eliminate the second defects in the TKA prototype). The variance GAPW to use it recurrently precise estimation of variances of estimates of delays in prehistory from the smoothed raids phase of the carrier of their trend.
To address the fourth disadvantage of the prototype is proposed to introduce a normalization operation interpolated output signal on an assessment of its amplitude. This assessment form recurrent smoothing of digitized samples of a mixture of signal and noise with signs symbols traced code (1 correspond to the samples with the sign "+", 0 with the sign "-").
This method and all of its operations can easily be implemented in software, the satellite navigation receiver.
Sources of information
1. Global Positioning System. Theory and Application, vol.1. Paul Zaitzman. Editor-in-Chief. Published by American Institute of Aeronautics and Astronautics. Inc. Fifth Printing Copyright 1996.
2. Ehekirchen. Integrated equipment users of space-based radio navigation systems. Navigation-95. Proceedings of the International conference. Planning global navigation Russia. 26-30 July 1996, t.ii, S.(8-70)-(8-76).
3. Useduring. Fully hardware digital signal receiver GPS/GLONASS// 2nd international conference on satellite communications. Moscow, 1996 Report, vol. 1, s-287 (Proc. of the 2-nd ICSC, Moscow, 1996. vol.1, pp.283-287).
4. Useduring. Principles for improving noise immunity in satellite navigation receiver new generation. Report. Proc. of the si reports II scientific-technical conference "Radiooptions technologies in engineering" September 13-17, 2004, Sochi, Russia, s.
5. Useduring. The possibility of building a NAP QUO with centimeter level accuracy absolute positioning. Proceedings of the Institute of applied astronomy RAS, VIP, 2005, St. Petersburg, Russia, s-346.
1. The method of tracking delay fronts ranging code signals of navigation satellites, including the operations of forming the digitized samples of the input signal mixture noise prediction delay from the time of the original assessment by the time the next expected change of code symbols, the interpolation of the ordinate of the input signal by the time the next shift code symbols, you can use this output as the error signal and smoothing it in a closed tracking delay circuit, wherein the digitized samples of the input signal select two covering the time of the next change of the character code and calculate their linear interpolation to that point.
2. The method according to claim 1, characterized in that the interpolated value of the ordinate normalized to assess the amplitude of the useful signal, multiplied by a Gaussian a priori probability density (GAPW) and receive the error signal according to the criterion of maximum a posteriori probability density (mapw), the mathematical expectation GAPS get the forecast delay using the phase shift of the carrier by the time the expected change C the ox code and the dispersion receive as recurrently smoothed her assessment of the historical process tracking delay.
FIELD: radio communications, possible use in systems for receiving speech transactions.
SUBSTANCE: noise suppressor contains first amplifier, band filter, detector of envelope curve, comparison device, commutator, first low frequency filter, first delay line, maximum finding device, minimum finding device, second low frequency filter, second amplifier, timer, second delay line.
EFFECT: increased trustworthiness when determining time lengths of signal which contain speech.
FIELD: engineering of wireless communication devices, which interact with communication system with code division based multi-access (CDMA).
SUBSTANCE: in accordance to the invention, wireless communication device operates in standby mode, in which it transitions between inactive state for saving power and active state for receiving one or more paging signals. Wireless communication device attempts a repeated capture of first pilot-signal, connected to first paging signal, which was demodulated previously, and second pilot-signal, which was previously tracked. Wireless communication device performs switching from first paging signal to second paging signal, connected to second pilot-signal, when an attempt of repeated capture of first pilot-signal failed, and an attempt of repeated capture of second pilot-signal succeeded.
EFFECT: ensured seamless paging coverage by wireless communication device which operates in paging mode, with simultaneous reduction of energy consumption in wireless communication device.
5 cl, 7 dwg
FIELD: communication systems.
SUBSTANCE: method for operation of mobile device is disclosed, where the device is combined receiver of satellite positioning system and mobile communication system. On detection of first action two following operations are performed: (i) for a period of time radio transmission of data through data transmission radio line from communication block of mobile device is blocked, and (ii) from communication block into receiver of satellite mobile device positioning system first control signal is transmitted, which permits processing of signal positioning system signals, received by receiver during aforementioned time period. Size of aforementioned time period may be predetermined or adjustable.
EFFECT: reduced crosstalk signal between communication and positioning sections of combined receiver.
5 cl, 6 dwg
FIELD: radio engineering, possible use in high speed radio communication systems which use impulse ultra-broadband signals.
SUBSTANCE: communication system contains receipt/transmission switch, band filter, antenna, processing and control block, buffer devices, generator of ultra-broadband impulses, low noise amplifier, attenuator, power divider, two temporary window devices, two threshold devices, two threshold voltage generators, synchronization block, two narrowband filters, narrowband filter switch, synthesizer of harmonic signal and amplifier of harmonic signal.
EFFECT: reduced time needed to find a client and time of communication lock of system.
FIELD: communications engineering, possible use for compensating non-linear distortions in wireless communication devices.
SUBSTANCE: in accordance to the invention, wireless communication device contains direct transformation receiver with frequency reduction and distortion suppression device for suppressing non-linear second order distortions in receiver, where suppression device has squaring device for receiving radio-frequency signal being received, injected into input of mixer in receiver, and generating square version of received radio frequency signal, amplification cascade, meant for receiving square version of received radio frequency signal, where output signal of amplification cascade has amplitude, corresponding to second order non-linearity characteristic of aforementioned receiver, and output communication device for sending output signal from amplification cascade to output of aforementioned receiver for generation of signal, transformed with reduced frequency and belonging to band of modulating signal frequencies, characterized by suppressed non-linear distortions of second order.
EFFECT: reduction of non-linear second order distortions, resulting from interference sources and occurring in direct transformation receiver with frequency reduction.
4 cl, 6 dwg
SUBSTANCE: the circuit generates interfacing signal between first and second integration circuits. Circuit contains supporting signal circuit (622), which outputs supporting signal, interfacing circuit (600) and analog signal transmission circuit (626). Interfacing circuit is realized on first integration circuit (600), during operation it connects to supporting signal circuit (622), receives supporting signal and input data signal and generates interfacing signal. Analog signal transmission circuit (626) is realized on second integration circuit, during operation it connects to control circuit (614), receives interfacing signal and outputs output signal. Supporting signal may represent a voltage or current signal and may be generated on first or second integration circuit. Interfacing circuit may be realized containing current mirror, connected to an array of switches, and may operate in re-digitization mode to simplify filtration requirements. Interfacing signal may represent a differential current signal, having resolution of several (for example, four, eight or more) bits. Analog signal transmission circuit (626) may represent, for example, distributed amplification amplifier, modulator or a different circuit.
EFFECT: improved interfacing between integration circuits with usage of lesser amount of signal lines, generating increased noise.
9 cl, 6 dwg
FIELD: mobile communications.
SUBSTANCE: method is claimed for providing information about condition of mobile station in mobile communication system, which provides data transfer service between mobile station and base station and transmits information about maximal data transmission speed, acceptable for mobile station, and information about receipt of data, stored in the buffer of mobile station, in reverse direction, so that base station determines speed of reverse data transmission of mobile station on basis of channel condition information, transmitted in reverse direction.
EFFECT: creation of method for efficient transmission of information about condition of buffer of mobile station using limited number of bits and efficient indication of information about state of buffer; to that end mobile station determines information about volume of data, stored in the buffer, on basis of information transferred from base station; mobile station quantizes received information about volume of data, stored in the buffer, and transmits quantized information to base station.
4 cl, 5 tbl, 2 dwg
FIELD: mobile communications, mobile stations, in particular, keyboard unit for a mobile station.
SUBSTANCE: to achieve the effect, keyboard unit of mobile station contains base key panel for supporting a set of keys, which contain a set of first keys and a set of second keys. Keyboard unit contains a set of first keys and a set of second keys positioned on base key panel, where a set of second keys is determined by means of horizontal central lines and vertical central lines of a set of first keys. A set of second keys may be determined additionally by means of external perimeters of a set of first keys. Keyboard unit may additionally contain a reinforcement plate connected to base key panel, for mechanically hardening the keyboard unit. A symbol of an alphabet may be assigned to each one of a set of first keys. A digit may be assigned to at least one of a set of second keys.
EFFECT: prevented complication of interaction of user with the keyboard, which occurs because dimensions of modern models of mobile stations are prone to reduction and, therefore, usable area of keyboard is also reduced.
2 cl, 14 dwg
FIELD: radio engineering; data transfer systems depending for their operation on operating-frequency hopping.
SUBSTANCE: correlators incorporated in operating-frequency hopping radio communication device enables element-wise accumulation of pseudorandom sequence signal (equal to pseudorandom sequence base) thereby affording protection against malicious interference; memory units make it possible to identify pseudorandom sequence code and operating frequency; microprocessor functions to repeatedly convert transmitted and received signals thereby ensuring protection against unauthorized access.
EFFECT: enhanced noise immunity, provision for informational and structural security of message being transferred.
1 cl, 2 dwg
FIELD: communications engineering, in particular, method for functioning of a mobile station in multi-access system with time division of channels (TDMA).
SUBSTANCE: in TDMA communication system, mobile stations are assigned time intervals and output power levels by base stations. This may result in situations, where combination of size of assigned time intervals and required output power level exceeds resource of mobile station. Mobile stations are offered an opportunity to reduce their average output powers in one-sided manner by reducing their peak output powers or reducing usage of assigned time intervals.
EFFECT: ensured high speed data transfer in mobile communication system.
2 cl, 15 dwg
FIELD: real time scale navigation with the goal of detecting position of mobile device.
SUBSTANCE: in the invention, radio-signals of three different carrier frequencies are used, transmitted by satellites. Method includes a stage for determining indeterminacy of carrier frequency phase of "especially wide phase track", stage for estimating indeterminacy of phase of "wide phase track" and stage for resolving phase indeterminacy of one of frequencies. Additional stage includes utilizing ionosphere corrections in real time scale during third stage, where these ionosphere corrections are based on continuously updated ionosphere model of aforementioned ionosphere layer, computed by stationary ground-based support station, combined with geodesic data, computed by the so-called leading stationary ground-based support station.
EFFECT: ensured capability for precise navigation at distances exceeding 100 kilometers from supporting satellite communication stations.
2 cl, 17 dwg, 6 tbl
FIELD: radio-navigation, possible use in signal receivers of satellite radio-navigation systems used to determine client location and current time from signals of GLONASS, GPS, and similar radio-navigation systems.
SUBSTANCE: in the method satellite signals included in search list are found, until number of detected signals, which is sufficient for navigation measurements, is produced. In first positions of the search list three satellites are included in arbitrary order which ensure maximal coverage of Earth surface. Further satellites are included into search list in order which is determined by maximal sum of average distances between each one of them and all satellites positioned in the list closer to the beginning. The search for signals of each checked satellite is performed simultaneously using all free channels of receiver with distribution of search range between the channels. Satellite signal search is performed serially based on aforementioned list, starting from first one in the list, until first detection of signal. The search for signals of further satellites remaining in aforementioned list is performed in order determined by maximal difference between the sum of average distances between the satellite selected for check and all earlier checked satellites with undetected signals and the sum of average distances between that satellite and all earlier checked satellites with detected signals.
EFFECT: creation of method for blind finding of signals in multi-channel receiver of satellite radio-navigation signals, ensuring reduction of average search time required to solve navigational problem of the number of satellite radio-navigation system signals.
2 cl, 3 dwg
FIELD: submarine, marine terrestrial and close-to-ground navigation, in particular type GPS and GLONASS systems.
SUBSTANCE: at a time instant, that is unknown for the receiver, a signal is synchronously radiated by several radiators with known co-ordinates. The radiated signals are received by the receiver, the signal speed square is measured in the current navigation session, the Cartesian co-ordinates of the receiver are computed according to the moments of reception of the radiated signal and the measured signal speed square.
EFFECT: enhanced precision of location of the signal receiver.
FIELD: radio navigation aids, applicable in digital correlators of receivers of satellite radio navigation system (SPNS) signals, in particular, in digital correlators of receivers of the SPNS GLONASS (Russia) and GPS (USA) signals.
SUBSTANCE: the legitimate signal in the digital correlator is detected by the hardware, which makes it possible to relieve the load of the processor and use its released resources for solution of additional problems. The digital correlator has a commutator of the SPNS signals, processor, digital mixers, digital controllable carrier-frequency oscillator, units of digital demodulators, accumulating units, programmed delay line, control register, digital controllable code generator, reference code generator and a signal detector. The signal detector is made in the form of a square-law detector realizing the algorithm of computation of five points of the Fourier sixteen point discrete transformation with additional zeroes in the interval of one period of the, c/a code with a subsequent computation of the modules of the transformation results and their incoherent summation and comparison with a variable threshold, whose value is set up depending on the noise power and the number of the incoherent readout. The signal detector has a controller, multiplexer, complex mixer, coherent summation unit, module computation unit, incoherent summation unit, noise power estimation unit, signal presence estimation unit and a unit for determination of the frequency-time coordinates of the global maximum.
EFFECT: provided acceleration of the search and detection of signals.
2 cl, 6 dwg
FIELD: aviation engineering.
SUBSTANCE: device has on-ground automated system for controlling air traffic made in a special way, interrogation unit and re-translator mounted on air vehicles and made in a special manner as well. Autonomous duplication is used for measuring distance between flying vehicles.
EFFECT: widened functional abilities.
FIELD: radio communication.
SUBSTANCE: in accordance with the invention, the device for radio communication provides for getting of first time base (for example, getting of the code time shift) from the signal received from the transmitter on the ground. The predetermined shift based at least on the delay of propagation of received signal is applied to the first time base for obtaining of the second time base. For example, the second time base may be equalized with the time base of the satellite system of position finding (for example, GPS NAVSTAR).
EFFECT: synchronizing signal is generated, with has a time code shift based on the second time base.
6 cl, 12 dwg
FIELD: satellite radio navigation, geodesy, communication, applicable for independent instantaneous determination by users of the values of location co-ordinates, velocity vector components of the antenna phase centers of the user equipment, angular orientation in space and bearing.
SUBSTANCE: the method differs from the known one by the fact that the navigational information on the position of the antenna phase centers of ground radio beacons, information for introduction of frequency and time corrections are recorded in storages of the user navigational equipment at its manufacture, that the navigational equipment installed on satellites receives navigational radio signals from two and more ground radio beacons, and the user navigational equipment receives retransmitted signals from two satellites.
EFFECT: high precision of navigational determinations is determined by the use of phase measurements of the range increments according to the carrier frequencies of radio signals retransmitted by satellites.
3 dwg, 1 tbl
FIELD: the invention refers to navigational technique and may be used at designing complex navigational systems.
SUBSTANCE: an integrated satellite inertial-navigational system has a radioset connected through an amplifier with an antenna whose outputs are connected to a computer of the position of navigational satellites and whose inputs are connected with the block of initial installation of the almanac of data about satellites' orbits. The outputs of this computer are connected with the inputs of the block of separation of radio transmitting satellites. The outputs of this block are connected with the first group of inputs of the block of separation of a working constellation of satellites whose outputs are connected with inputs of the block of computation of a user's position. The system has also a meter of projections of absolute angle speed and a meter of projections of the vector of seeming acceleration which are correspondingly connected through a corrector of an angle speed and a corrector of seeming acceleration with the first group of inputs of the computer of navigational parameters whose outputs are connected with the first group of the outputs of the system. The system also includes a computer of initial data which is connected with three groups of inputs correspondingly to the outputs of the meter of projections of absolute angle speed and the meter of projections of a vector of seeming acceleration and to the outputs of a block of integration of information and also to the outputs of the block of computation of a user's position. At that part of the outputs of the computer of initial data are connected to the inputs of the computer of navigational parameters and all outputs are connected to the first group of the inputs of the block of integration of information whose second group of inputs is connected with the outputs of the corrector of an angle speed and the corrector of seeming acceleration, and the third group of inputs is connected to the outputs of the block of computation of a user's position. One group of the outputs of the block of integration of information is connected to the second group of the inputs of the block of selection of a working constellation of satellites, the other group of the outputs are directly connected to the second group of the outputs of the system, the third group of the outputs are connected to the inputs of the corrector of seeming acceleration and the fourth group of the outputs are connected with the inputs of the corrector of an angle speed and the second group of the inputs of the computer of initial data.
EFFECT: increases autonomous of the system, expands composition of forming signals, increases accuracy.
FIELD: railway transport.
SUBSTANCE: proposed repair team warning device contains "n" navigational satellites, dispatcher station consisting of receiving antenna, satellite signals receiver, computing unit to determine corrections to radio navigational parameter for signals from each navigational satellite, modulator, transmitter, transmitting antenna and computer of standard values of radio navigational parameters, movable object installed on locomotive and consisting of satellite signals receiving antenna, satellite signals receiver, computing unit for determining location of movable object, first receiving antenna, first receiver, first demodulator, matching unit, modulator, transmitter, transmitting antenna, second receiving antenna, second receiver and second demodulator, and warming device consisting of receiving antenna, receiver, demodulator, computing unit for determining distance between movable object, warning device, modulator, transmitter, transmitting antenna, satellite signals receiving antenna, satellite signals receiver and control unit.
EFFECT: improved safety of track maintenance and repair teams in wide zone of operation.
FIELD: radio engineering, applicable in receivers of signals of satellite radio navigational systems.
SUBSTANCE: the micromodule has a group of elements of the channel of the first frequency conversion signals, group of elements of the first channel of the second frequency conversion of signals, group of elements of signal condition of clock and heterodyne frequencies and a group of elements of the second channel of the second frequency conversion signals.
EFFECT: produced returned micromodule, providing simultaneous conversion of signals of standard accuracy of two systems within frequency ranges.
FIELD: the invention refers to radio technique means of determination of a direction, location, measuring of distance and speed with using of spaced antennas and measuring of a phase shift or time lag of taking from them signals.
SUBSTANCE: the proposed mode of determination of coordinates of an unknown transmitter is based on the transmitter's emitting of a tracing signal to the satellite, on receiving of signals of an unknown transmitter and legimite transmitters which coordinates are known, on forming a file of clusters, on selection of the best clusters out of which virtual bases are formed for calculating coordinates of legimite and unknown transmitters according to the coordinates of legimite transmitters and the results of calculation of their coordinates one can calculate mistakes of measuring which are taken into account at calculating the coordinates of the unknown transmitter.
EFFECT: increases accuracy of determination of coordinates of an unknown transmitter in the system of a satellite communication with a relay station on a geostationary satellite.
2 dwg, 1 tbl