RU2048676C1 - Radio signal phase meter - Google Patents

Abstract

FIELD: radio facilities for target location. SUBSTANCE: radio phase meter has metering unit 1 incorporating standard generator 2, frequency synthesizer 3, power amplifier 4, antenna switch 5, mixer 6, intermediate-frequency amplifier 7, limiting amplifier 8, phase detector 9, computing unit 10, commutator-shaper 11, transceiving antenna 12, input unit 13, output unit 14, K phase metering filters 15, repeater 16 incorporating standard generator 17, frequency synthesizer 18, phase shifter 19, power amplifier 20, antenna switch 21, mixer 22, intermediate- frequency amplifier 23, limiting amplifier 24, phase detector 25, computing unit 26, commutator-shaper 27, and transceiving antenna 28. EFFECT: improved design. 8 dwg

Description

 The invention relates to measuring equipment and can be used to create measuring systems in geodesy.

A device for measuring the amplitude and phase of a radio signal, comprising a measuring unit consisting of a serially connected master oscillator, a power amplifier, an antenna switch connected to a transceiver antenna, a receiver and an amplitude-phase meter, the second input of which is connected to the second output of the master oscillator, and low-frequency generator and located between the output of the low-frequency generator and the second inputs of the antenna switch of the switch-former, the second outputs otorrhea connected to second inputs of the power amplifier, and rentranslyator,
comprising a serially connected master oscillator, a power amplifier, an antenna switch connected to a transceiver antenna, a receiver and an automatic phase adjustment unit, the output of which is connected to the input of the master generator, as well as serially connected generator located between the second output of the automatic phase adjustment unit and the second inputs of the antenna switch low frequency and commutator-shaper, the second outputs of which are connected to the power amplifier, and the third to the receiver, and located The amplitude-phase meter located between the second output of the master oscillator and the second input of the automatic phase adjustment unit, the second input of which is connected to the second output of the receiver.

 The disadvantage of this device is the low accuracy of the measurement of the information parameter due to the emission of the signal only at the frequency of the reference oscillator.

A device is known for measuring the phase of a radio signal, comprising a measuring unit consisting of a reference generator, a frequency synthesizer, a driver switch, a serially connected power amplifier, an antenna switch, a mixer, an intermediate frequency amplifier, an amplifier-limiter, a phase detector, and a decision unit, a transceiver antenna, connected to the antenna switch, and the output of the reference generator is connected to the first inputs of the frequency synthesizer, commutator-shaper and the second phase input Vågå detector outputs deciding unit connected to the control input of the reference oscillator, the synthesizer frequency and the switch-driver, the outputs of which are connected to control inputs of power amplifiers, antenna switch and the phase detector outputs a frequency synthesizer coupled to the mixer and the power amplifier,
a repeater consisting of a reference generator, a frequency synthesizer, a switch-driver, a series-connected phase shifter, a power amplifier, an antenna switch, an intermediate frequency mixer, an amplifier-limiter, a phase detector and a decision unit, a transceiver antenna connected to the antenna switch, and the output of the reference generator connected to the first inputs of the frequency synthesizer, commutator-shaper and the second input of the phase detector, the outputs of the deciding unit are connected to the control by the moves of the phase shifter and frequency synthesizer, the outputs of which are connected to the phase shifter and mixer, the outputs of the commutator-shaper are connected to a power amplifier, an antenna switch, and a phase detector.

 This device is characterized by the fact that it allows with high accuracy to measure the distance between the measuring unit and the repeater due to the emission of signals at several frequencies.

 The disadvantage of this device is the low accuracy of distance measurement when exposed to interference in the area of operation of the measuring unit and the repeater.

 The purpose of the invention is to increase the accuracy of measuring an information parameter.

This is achieved by the fact that in the device for measuring the phase of the radio signal containing a measuring unit consisting of a reference generator, a frequency synthesizer, a commutator-shaper, a serially connected power amplifier, an antenna switch, a mixer, an intermediate frequency amplifier, an amplifier-limiter of a phase detector, and a decision unit transceiver antenna connected to the antenna switch, and the output of the reference generator is connected to the first inputs of the frequency synthesizer,
the shaper switch and the second input of the phase detector, the outputs of the deciding unit are connected to the control inputs of the reference generator, frequency synthesizer and the shaper switch, the outputs of which are connected to the control inputs of the power amplifier, antenna switch and phase detector, the outputs of the frequency synthesizer are connected to the power amplifier and mixer , a repeater consisting of a reference generator, a frequency synthesizer, a commutator-shaper, a series-connected phase shifter, a power amplifier, ennogo switch, mixer, intermediate frequency amplifier,
a limiter amplifier, a phase detector, and a transceiver antenna deciding unit connected to an antenna switch, wherein the output of the reference generator is connected to the first inputs of the frequency synthesizer, the commutator-shaper, and the second input of the phase detector, the outputs of the decision unit are connected to the control inputs, phase shifter, and frequency synthesizer, the outputs of which are connected to the phase shifter and mixer, the outputs of the switch-former are connected to a power amplifier,
an antenna switch and a phase detector, an input unit, an output unit, and K phase measurement filters are introduced into the measuring unit, the inputs K of the phase measurement filters connected to the output of the phase detector, and their outputs connected to the information inputs of the input unit, the output of which is connected to the decision unit, the outputs of the decisive unit are connected to the inputs of the input unit and the output unit, the outputs of which are connected to the control inputs of the phase measurement filters.

 The introduction of the above blocks with the described relationships makes it possible to increase the accuracy of measuring the information parameter under the influence of interference due to the introduction of additional filtering of phase measurements at each of the received frequencies of the device.

 In FIG. 1 shows a structural diagram of the proposed device; in FIG. 2 timing diagrams explaining his work; in FIG. 3 version of the crucial unit; in FIG. 4 block diagram of the algorithm of its operation in the measuring unit; in FIG. 5th option of the filter of phase measurements; in FIG. 6 and 7 are embodiments of input and output blocks, respectively; in FIG. 8 version of a phase detector.

The device comprises a measuring unit 1, consisting of a series-connected reference generator 2, a frequency synthesizer 3, a power amplifier 4, an antenna switch 5, a mixer 6, an intermediate frequency amplifier 7, an amplifier-limiter 8, a phase detector 9, forming an amplitude-phase meter of the decision block 10, a shaper-switch 11, the outputs of which are connected to a power amplifier 4, a phase detector 9, and an antenna switch 5 connected to a transceiver antenna 12, an input unit 13, an output unit 14, K filters basic measurements 15 ₁ 15 _k , inputs K of filters 15 ₁ 15 _k connected to the output
phase detector 9, and the outputs K of the filters 15 ₁ 15 _{k are} connected to the information inputs of the input unit 13, the output of which is connected to the decision block 10, the outputs of the decision block 10 are connected to the control inputs of the reference generator 2, frequency synthesizer 3, input block 13, and output block 14, the outputs of which are connected to the control inputs of the filters 15 ₁ 15 _k , the output of the reference generator 2 is connected to a phase detector 9 and a commutator-shaper 11, the second output of the frequency synthesizer 3 is connected to the mixer 6,
a repeater 16 comprising a reference oscillator 17, a frequency synthesizer 18, a phase shifter 19, a power amplifier 20, an antenna switch 21, a mixer 22, an intermediate frequency amplifier 23, an amplifier-limiter 24, a phase detector 25, and a decision unit 26, the outputs of which are connected to the control inputs of the frequency synthesizer 18 and the phase shifter 19, the output of the reference generator 17 is connected to a phase detector 25 and a switch-former 27, the outputs of which are connected to a phase detector 25, a power amplifier 20, and an antenna switch yuchatelem 21, a duplexer 21 is connected to the transceiver antenna 28, a second output of the frequency synthesizer 18 is connected to the mixer 22.

 The decisive unit 10 (26) contains (see Fig. 3) contains a microprocessor module 29, the address bus of which is connected to the address inputs of the read-only memory element 30, the read-only memory element 31 and the inputs of the decoder 32, 33, the outputs of which are connected to the control inputs of the storage elements 30 and 31, the control outputs of the microprocessor module 29 "read", "write" are connected to the control inputs of the constant 30 and operational 31 memory elements, respectively, the information inputs of the outputs of the microprocessor module 29 are connected s outputs with permanent memory element 30, to data inputs of RAM output member 31 to the inputs of registers 34, 40, the outputs of decoder 32 are connected through the elements 47, 41 of registers 34, 40 control inputs.

The phase measurement filter 15 ₁ 15 _k (see Fig. 5) contains a register 48, the outputs of which are connected to the sine calculator 49 and the cosine calculator 50, drives 51 and 52, the outputs of which are connected to the output register 53, the computing unit 54, the outputs of which are the outputs of block 15, the pulse shaper 55, the output of which is connected to the inputs of the drives 51, 52 and the input of the counter 56, the control inputs of which are connected to the block 14, and the output is connected to the output register 53 and the pulse shaper 57, the output of which is connected to the control input of the calculator block 54.

The input block 13 (see Fig. 6) contains K registers 58 ₁ 58 _k , the outputs of which are the outputs of block 13 and are connected to block 10, the control inputs of the registers 58 ₁ 58 _{k are} connected to block 10.

 The phase detector 9 (25) contains (see FIG. 8) an EXCLUSIVE OR element 62 connected in series, a counter 63 and a register 64, an EXCLUSIVE OR element 65 connected in series, a counter 66 and a register 67, a computational unit 68, the input bus of which is connected to the outputs registers 64, 67, a pulse generator 69 connected through a matching element 70 to the counting inputs of the counters 63, 66, a pulse shaper 71 connected to a counter 63, a register 64, a counter 66, a register 67, a computing unit 68, a matching element 70, an orthogonal shaper about the signal 72 connected to the elements EXCLUSIVE OR 62, 65.

The output unit 14 (see Fig. 7) contains a decoder 59, the outputs of which are connected through an element And 60 ₁ 60 _k with the control inputs of the registers 61 ₁ 61 _k .

 The device operates as follows.

The reference generators 2, 17 generate continuous harmonic signals of frequency f, which are fed to the commutators-shapers 11, 27 and frequency synthesizers 3, 18. Frequency synthesizers 3 and 18 generate a reference signal for frequency f _o and several auxiliary signals with frequencies f ₁ , f ₂ , f _i , in addition, in frequency synthesizers 3 and 18
forming signals for heterodyne mixers 6 and 22 with _exhaust frequencies f, f _{1D, Id} .f f _2r, wherein the frequency control radiated (received) signals is carried out deciding unit 10, prichëm _exhaust f _O f f _OL, f ₁ f f _{ol 1D} , f ₂ f _2Г f _OL , f _i f _iГ f _OL , where f _{OL is the} intermediate frequency allocated by amplifiers 7, 23, at which the phase of the received signals is measured. Shaper-switches 11 and 27 generate control signals for blocks 4 (see Fig. 2, a), 5.9 (see Fig. 2, b), 21, 25 (see Fig. 2, c), 20 ( see Fig. 2, d).

Timing diagrams in FIG. 2 are given for the steady-state operating mode of the device when the time intervals of the radiation and reception of signals of the measuring unit 1 are synchronized with the corresponding intervals of the relay 16. Here T _{c is the} time cycle of the device; t is the interval of emission (reception) of the reference signal with a frequency of f _O ; 2t interval of radiation (reception) of auxiliary signals with frequencies f _i ; t _{p the} duration of the pause.

In the power amplifier 4, the signals from the frequency synthesizer 3 are amplified to the required value and the output radio pulse signals are generated under the influence of a control signal from the commutator-shaper 11 (see Fig. 2, a). The radio pulse signal from the power amplifier 4, passing through the antenna switch 5, is radiated into the space by the transceiver antenna 12 (see Fig. 2, e). The signal emitted into the space by the measuring unit 1 during time T _and , passing through the propagation medium, is received by the transceiver antenna 28 of the relay 16 and through the antenna switch 21 is fed to the input of the mixer 22. The signals from the frequency synthesizer 18 with frequencies ( f _{exhaust gas} , f _1G , f _2G , f _iG ) in accordance with FIG. 2, c.

,

(1)
φ₁ ^' φ₁ Δ φ₁ φ₂ ^' φ₂ Δ φ₂ φ_i ^' φ_i Δ φ_i (2)
Полученные значения фазы Δ φ₁ Δ φ₂ Δ φ_i запоминаются в решающем блоке 26. В течение интервала Т_ризлучаются в пространство сигналы от ретранслятора 16, при этом управление частотой и фазой излучаемых сигналов осуществляется решающим блоком 26 через блоки 18 и 19 соответственно. В моменты времени t, когда ретранслятором 16 излучаются в пространство основные сигналы частотой f_Офазовращатель 19 решающим блоком 26 установлен в исходное (нулевое) состояние, тогда излучаемые опорные сигналы частотой f_О имеют фазу сигнала f опорного генератора 17. В течение интервалов 2t, когда ретранслятором 16 излучаются в пространство вспомогательные сигналы частотами f₁, f₂,f_i, сигналами управления от решающего блока 26 устанавливаются в фазовращателе 19 фазовые сдвиги Δ φ₁Δ φ₂ Δ φ_i соответственно.In mixer 22, the transformation of the received signal at the frequency f _OL (prichëm f _O f _exhaust f _OL, f ₁ f _1G f _OL and m. P.) In the intermediate frequency amplifier 23 signals the frequency f _OL filtered and amplified, and then normalized to amplitude in the amplifier-limiter 24 and fed to the phase detector 25. In the phase detector 25 under the influence of control signals, the phase shifts of the received signals are measured, while the phase shifts φ ₀₁ , φ ₀₂ , φ _oi , φ _oi 'of the reference signals of frequency f _O are measured (Fig. 2, c) and phase shifts φ ₁ , φ ₂ , φ _i help real signals with frequencies f ₁ , f ₂ . f _i . Information from the phase detector 25 enters the decision block 26, in which the phase relationships are calculated during the intervals t _n :

,

(1)
φ ₁ ^' φ ₁ Δ φ ₁ φ ₂ ^' φ ₂ Δ φ ₂ φ _i ^' φ _i Δ φ _i (2)
The obtained phase values Δ φ ₁ Δ φ ₂ Δ φ _{i are} stored in the decision block 26. During the interval T _p, signals from the relay 16 are radiated into space, while the frequency and phase of the signals emitted are controlled by the decision block 26 through blocks 18 and 19, respectively. At times t, when the repeater 16 emits the main signals of frequency f _O into the space 16, the phase shifter 19 is set to the initial (zero) state by the deciding unit 26, then the emitted reference signals of frequency f _O have the phase of the signal f of the reference oscillator 17. During the intervals 2t, when by the relay 16 auxiliary signals with frequencies f ₁ , f ₂ , f _i are emitted into space, phase shifts Δ φ ₁ Δ φ ₂ Δ φ _i, respectively, are set in the phase shifter 19 by control signals from the decision unit 26.

Thus, during the interval T _{r, the} relay 16 emits auxiliary signals whose phase is equal to the phase of the received signals during the interval T _and from the measuring unit 1, as well as reference signals whose phase is equal to the phase of the reference generator 17. In the power amplifier 20, the signals are amplified from the phase shifter 19 and the formation of the output radio pulse signals under the influence of a control signal from the switch-former 27 (see Fig. 2, g). The radio pulse signal from the power amplifier 20, passing through the antenna switch 21, is radiated into the space by the transceiver antenna 28 (see Fig. 2, e).

The signal emitted into the space by the repeater 16 during the time T _r , passing through the propagation medium, is received by the transmitter-receiver antenna 12 of the measuring unit 1 and through the antenna switch 5 is fed to the input of the mixer 6, to the second input of which signals from the frequency synthesizer 3 with frequencies (f _{Exhaust gas} , f _1G , f _2G .f _iG ) in accordance with FIG. 2b. In the mixer 6, the received signal is converted to the frequency f _PR (moreover, f _О f _ОГ f _PR , f ₁ f _1Г f _PR , etc.), in the amplifier of intermediate frequency 7, signals with a frequency f _{PR are} filtered and amplified, and then normalized to amplitude in the amplifier-limiter 8 and fed to the phase detector 9. In the phase detector 9 under the influence of control signals (see Fig. 2, b), the phase shifts of the received signals are measured, while the phase shifts ϑ ₀₁ , ϑ ₀₂ , ϑ _oi are measured , θ _oi 'a reference signal of frequency f _O and the phase shifts θ _1, θ _2, θ _i aux -negative signal frequencies f _1, f _2, f _i.

Information from the phase detector 9 enters the decision block 10. At the same time, accumulating information in the decision block 10 about changes in the phase shifts Δ ϑ, for example, for the frequency f _О , that is, ϑ ₀₁ , ϑ ₀₂ , ϑ _oi in one or more cycles of the device T _c , you can determine the deviation Δ f of the frequency of the reference oscillator 2 from the frequency of the reference generator 17 during the observation Δ t of the deviation of the frequency of the generators. The frequency deviation code of the reference oscillator 2 Δ f is supplied from the decision block 10 to the control input of the reference oscillator 2, providing a change in its output frequency and decreasing Δ f to zero.

Furthermore, in decision block 10, the measured data θ _of, θ _1, θ _i are determined by the random component of the error phase measurements for one or more cycles T _u of the device, which values are then used in decision block 10 to control the mode of the filtration phase measurements in blocks 15 ₁ 15 _K.

Information from the phase detector 9 also arrives at the inputs of the phase measurement filters 15 ₁ 15 _k , and the phase shifts of the reference signals of frequency f _О (ϑ ₀₁ , ϑ ₀₂ , ϑ _oi , ϑ _oi ') are accumulated in the filter 15 ₁ , the phase shifts of the auxiliary frequency signals f (ϑ ₁ ) the phase shifts of frequency signals f ₂ (ϑ ₂ ) in the filter 15 ₃ , etc., are accumulated in the filter, up to the frequency f _i , for which the phase shifts ап _i accumulate in the filter 15 _k . In the filters of phase measurements 15 ₁ 15 _k is the processing of primary phase measurements obtained for several cycles T _{c the} operation of the device. In this case, the control of the operation modes of the phase measurement filters 15 ₁ 15 _{k is} carried out from the deciding unit 10 through the output unit 14.

-

=

,

-

=

-

=

, (3) где

,

,

оценки фазовых сдвигов, полученные в результате обработки первичных фазовых измерений блоках 15₁ 15_к.Information from the outputs of the filters 15 ₁ 15 _k (ϑ _о , ϑ ₁ , ϑ ₂ , ϑ _i ) comes through the input unit 13 to the decision block 10, in which the phase relations are calculated

-

=

,

-

=

-

=

, (3) where

,

,

estimates of phase shifts obtained as a result of processing the primary phase measurements in blocks 15 ₁ 15 _K.

The reception of information from the outputs of the filters 15 ₁ 15 _{k is} controlled from the decision block 10 through the input block 13.

, ΔΨ₂,

запоминаются в решающем блоке 10, а затем используются в решающем блоке 10 для устранения многозначности фазовых отчетов. На практике частоты f₀, f₁, f₂.f_i выбираются таким образом, чтобы выполнялись соотношения f₀ f₁ F₁, f₀ f₂ F₂,f₀ f_i F_i, F₁/F₂ m₂,F(i-1)/Fi= m_i, где F₁ частота точной ступени (рабочая частота устройства); F₂, F₃,F_i частота грубых ступеней; m₁, m₂,m_i коэффициенты сопряжения частот.The obtained values of the phase shifts

, ΔΨ ₂ ,

stored in decision block 10, and then used in decision block 10 to eliminate the ambiguity of phase reports. In practice, the frequencies f ₀ , f ₁ , f ₂ .f _i are chosen so that the relations f ₀ f ₁ F ₁ , f ₀ f ₂ F ₂ , f ₀ f _i F _i , F ₁ / F ₂ m ₂ , F (i-1) / Fi = m _i , where F _{1 is the} frequency of the exact stage (operating frequency of the device); F ₂ , F ₃ , F _{i the} frequency of the coarse steps; m ₁ , m ₂ , m _i frequency conjugation coefficients.

с учетом коррекции при устранении многозначности соответствует сигналу частотой F₁, прошедшего дважды через среду распространения, соответствует времени запаздывания радиоволн в точке приëма по отношению к моменту их излучения и может использоваться для точного определения расстояния (r) между антенной 12 измерительного блока 1 и антенной 28 ретранслятора 16 при известной скорости распространения радиоволн и измеренной величине

по формуле
r

(4) где С скорость распространения радиоволн.Thus, the magnitude of the phase shift

taking into account the correction when eliminating ambiguity, it corresponds to a signal with a frequency F ₁ that has passed twice through the propagation medium, corresponds to the delay time of the radio waves at the reception point with respect to the moment of their emission and can be used to accurately determine the distance (r) between the antenna 12 of the measuring unit 1 and antenna 28 repeater 16 at a known propagation velocity of the radio waves and the measured value

according to the formula
r

(4) where C is the speed of propagation of radio waves.

, в фильтре 15₂

а в фильтре 15_к

, при этом вычисления по формулам (3) должны выполняться в соответствующих фильтрах 15₁ 15_к либо фазовом детекторе 9.At a high speed of movement of the object on which the measuring unit 1 is installed to improve the accuracy of measuring the phase shifts of the received signals, the phase measurement filters 15 ₁ 15 _k can process the phase measurements obtained in accordance with expressions (3) for several cycles of operation of the device. Then in the filter 15 ₁ accumulate phase shifts

, in the filter 15 ₂

and in the filter 15 _to

, while the calculations according to formulas (3) should be performed in the corresponding filters 15 ₁ 15 _to or phase detector 9.

The block diagram of a variant of the decision block 10 (26) is shown in FIG. 3. The decoder 33 provides a choice of permanent 30 or operational 31 memory element, which stores the program, constant or current information, respectively. The microprocessor module 29 processes and exchanges information in accordance with the block diagram of FIG. 4 and is connected with blocks 30 33 by the address bus (ША) and with blocks 30, 31, 34 40
information data bus (SD), may have control outputs with signals "read" and "write" to control the permanent 30 and operational 31 memory elements, respectively, "output", for example, for outputting information on the bus SH in blocks 2, 3, 11, 13, 14, 18, 19, the interrupt request input for entering information into block 10 (26) by signals from block 9 (25), the input input for entering information from block 13, access (output) signals from the side of the block 10 (26) to external blocks are formed by decoding the address code of the corresponding register in the decoder 32 and conjunction its output signals with the signal "output" in the elements And 41 47. The output signals from the elements and 41 47 record information from the microprocessor module 29 to the registers 34 40. When implementing the decision block 10 (26) based on the microprocessor K580, the microprocessor module 29 consists of three LSI-central processor K580IK80, system controller K580VK28, clock generator K580GO24.

Structural embodiment of the phase measurement filter circuit 15 _{to January 15} shown in FIG. 5. The device provides processing of primary measurements of phase shifts and, in the presence of various types of interference in the input signal of measuring unit 1, provides an increase in the accuracy of estimating phase shifts due to the implementation of filtering algorithms. The signals from the output of the phase detector 9 are supplied to the buffer register 48 and the logic element 55. From the buffer register 48, data codes are supplied to the sine calculator 49 and the cosine calculator 50, which are, for example, a table-type read-only memory. The calculated values are supplied to the drives 51 and 52, respectively.

The signal from the counter 56 of the primary estimates, which controls the number of accumulated data, for several cycles T _{c of} operation of the device is supplied to the output register 53 and the shaper 57 of the signal of readiness for interruption of data for the computing unit 54. The pulse shaper 55 provides information in the register 48 and generates a ready signal for blocks 51, 52, 56. The operation mode of the filter 15 is controlled from block 14 by changing the accumulation cycles due to the preset counter 56.

Input block 13 (see Fig. 6) performs the function of exchanging information between blocks 15 ₁ 15 _k and decision block 10. According to the control signals from block 10, the “recording” information from the outputs of blocks 15 ₁ 15 _{k is} written to the registers 58 ₁ 58 _k, respectively .

Then, according to the control signals from block 10, information is sequentially read in time from the registers 58 ₁ , 58 ₂ , 58 _k to the decision block 10.

The output block 14 (see Fig. 7) provides information exchange between the block 10 and the blocks 15 ₁ 15 _k , and the signals of access (output) from the block 10 to the blocks 15 ₁ 15 _k are generated by decrypting the address code of the corresponding register in the decoder 59 konyuktsii and its output signal to "output" a signal to elements 60 and 60 _{to 1.} The output signals of the elements And 60 ₁ 60 _k is the recording of information from block 10 in the registers 61 ₁ 61 _k .

 Phase detectors 9 (25) can be implemented according to known schemes, or based on orthogonal phase meters of bounded signals according to the structural diagram of FIG. 8.

Rectangular pulses from the output of the limiter 8 or 24 with a frequency f _pr are supplied to the EXCLUSIVE OR elements 62, 65. The orthogonal signal generator 72 generates from the signals of the reference generator 2 or 17 two rectangular quadrature oscillations with a frequency f _pr , the first oscillation goes to the EXCLUSIVE OR element 62, the second, shifted by 90 ^° relative to the first, by the element EXCLUSIVE OR 65.

 The EXCLUSIVE OR elements 62 and 65 provide signal multiplication operations from the outputs of the limiter and from the outputs of the orthogonal signal generator 72. The pulse sequences from the outputs of the EXCLUSIVE OR 62 and 65 elements are supplied to the control inputs of the counters 63 and 66, respectively.

 The signals from the outputs of the elements EXCLUSIVE OR 62 and 65 are used to control the operation mode of the counters 63 and 66, which count the number of pulses coming from the pulse generator 69 through the coincidence element 70.

At the end of the measurement time t generated by the pulse shaper 71, the coincidence element 70 closes, the codes of the numbers K ₁ and K ₂ accumulated in the counters 63 and 66, respectively, for the measuring interval, are rewritten according to the control signals from block 71 to registers 64 and 67, respectively.

According to the control signals from the driver 71, the measuring information is read out sequentially from the registers 64, 67 (K ₁ , K ₂ ) to the computing unit 68. The counters 63, 66 are then set to the initial (zero) state by a signal from the former 71, the matching element 70 opens and the cycle repeats.

 Computing unit 68 calculates the arc tangent function of the ratio of the measured values, i.e.

φ arctan K ₁ / K ₂ can also calculate the value of the phase difference.

 The pulse shapers 55, 71 perform the functions of generating control signals necessary for organizing the exchange of information between the respective blocks.

 In the practical implementation of the phase detector 9 (see Fig. 8), the counters 63 and 66 can be made in the form of reversible or in the form of summing counters. In the case of the use of reversible counters 63 and 65, the signals from the outputs of the elements 62 and 65 control the counting mode, i.e., at the moments of coincidence of the polarities of the input pulses of the elements 62 and 65, the reverse counters work to add, if the polarity of the input pulses of the elements 62 and 65 do not coincide, they are subtracted .

 When using the summing counters 63 and 66 at the moments of coincidence of the polarities of the input pulses of the elements 62 and 65, the counters 63 and 66 sum the pulses coming from the generator 69, if the polarity of the input pulses of the elements 62 and 65 do not coincide, they are not counted. To calculate the phase shift (in this case, in computing unit 68), the results obtained during the measurement cycle in the counters 63 and 66 are centered, i.e., from these results, corrections equal to half the known number of pulses of the generator 69 per measurement cycle are calculated and the function arctangent of the ratio of the obtained values.

 The computing unit 54, 68 can be performed on the basis of a microprocessor in a typical structure.

 Controlled frequency synthesizers 3 and 18 can be implemented, for example, similarly to the synthesizer Ch6-31.

 Shaper-switches 11 and 27 can be made in the form of a counter, the outputs of which are connected to the address inputs of a permanent storage device that stores the values of the codes of numbers corresponding to the time diagrams of FIG. 2.

 Switches 5, 21, can be performed, for example, on pin diodes or on chips KR590KN4.

 The driver of the orthogonal signal 72 can be made in the form of three triggers operating in the frequency division mode by two, and the inputs of the second and third triggers, respectively, are connected to the direct and inverse outputs of the first trigger. Then the signals from the outputs of the second and third triggers will be shifted relative to each other by a quarter of the period of the output frequency.

Registers 48, 53, 58 ₁ 58 _k , 61 ₁ 61 _k , 64, 67 can be performed, for example, on K155IR15, K555IR23 microcircuits with three output states, which easily provides an information exchange mode.

 Thus, thanks to new elements and connections, the accuracy of measuring the distance between the measuring unit and the repeater is increased in the presence of interference due to the additional filtering of phase measurements at each of the received frequencies of the device. Then the proposed device will function when exposed to the input signal of the measuring unit broadband and concentrated on the spectrum of interference.

 In the prototype, to determine the information parameter of the device, phase shifts are measured at each of the received frequencies, the values of which eliminate the ambiguity of phase readings and calculate the distance. In this case, the presence of interference in the received signal will lead to a decrease in the accuracy of determining the distance, and may also lead to a violation of the conditions for correct elimination of the ambiguity of phase readings and, as a result, to malfunctions in the correct determination of distances. Such operation of the measuring unit is possible not only in the presence of interference, but also by increasing the distance between the measuring unit and the repeater by a significant amount, which leads to a decrease in the level of the received signal. These disadvantages are excluded in the attached device.

Claims (1)

 DEVICE FOR MEASURING A PHASE OF A RADIO SIGNAL, comprising a measuring unit including a reference generator, a commutator-shaper, a serially connected power amplifier, an antenna switch, a mixer, an intermediate frequency amplifier, an amplitude-phase meter, the output of the reference generator is connected to the second input of the amplitude-phase meter and the first the input of the shaper-switch, the outputs of which are connected to the control inputs of the power amplifier, amplitude-phase meter and antenna switch, soy antenna with a transceiver antenna, a repeater including a reference generator, a switch-driver, a power amplifier connected in series, an antenna switch, a mixer, an intermediate-frequency amplifier, an amplitude-phase meter, the output of the reference generator is connected to the second input of the amplitude-phase meter and the input of the driver-shaper the outputs of which are connected to the control inputs of the amplitude-phase meter, power amplifier and antenna switch connected to the transceiver an antenna, characterized in that a frequency synthesizer, a deciding unit, an input unit, an output unit and K phase measurement filters are inserted into the measuring unit, the first and second outputs of the deciding unit are connected to the control inputs of the commutator-driver and frequency synthesizer, the input of which is connected to the output of the reference generator, the outputs with the input of the power amplifier and the second input of the mixer, respectively, the output of the amplitude-phase meter is connected to the first input of the decision unit and the inputs K of the phase measurement filters, the outputs of which are connected are connected to the information inputs of the input unit, the output of which is connected to the second input of the decisive unit, the third, fourth and fifth outputs of which are connected to the control input of the reference generator and the inputs of the input unit and output unit, the outputs of which are connected to the control inputs of K phase measurement filters, and a repeater introduced in series connected decision block, a frequency synthesizer and a phase shifter, the output of which is connected to the input of the power amplifier, the output of the amplitude-phase meter is connected to the input of the decision block, exit which is connected to a control input of the phase shifter, the reference oscillator output is connected to an input of frequency synthesizer, a second output connected to the second input of the mixer.

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