RU139198U1 - FREQUENCY SELECTION DEVICE AND IDENTIFICATION OF RADIO-RADIATING TARGETS OF A SHIP RADAR COMPLEX WITH A FUNCTIONAL CONTROL DEVICE - Google Patents

Abstract

A device for frequency selection and identification of radio-emitting targets (RIC) of a shipborne radar system (CRL) with a functional control device (UFC), containing a high-frequency amplifier (UHF), a pass-through filter (PPF), a logarithmic detector-video amplifier (LDVU), and an analog- a digital converter (ADC) and a computer, characterized in that a second LDLU, as well as at least three high-frequency keys (VCHK), at least three high-frequency attenuators (VChA), a broadband transp an onator (ШПТ), at least three power dividers (DM), an intermediate frequency converter (ППЧ), an illumination unit for the current radio engineering situation (BOTRTO), a screen and the aforementioned UFK, while the signals from the RIC received by the radar antenna KRLK through the first, the second and third HF and the first, second and third HF, are fed to the inputs of the ШПТ, from the output of which the signals are fed to the input of the first DM, from the first output of the first DM, the signals are fed to the input of the UHF, from which the signals are fed to the input of the first LDHU through the PPF, from the output of the first LDLU signal The signals are fed to the input of the second DM, and from its first output, to the fifth input of the ADC, from the second output of the first DM, the signals are fed to the input of the frequency converter, then from the first output, the frequency converter is fed to the input of the second LDDU, from the output of which the signals are fed to the input of the third DM , and from the first output of the third DM - to the first input of the calculator, simultaneously the signals from the second, third, fourth and fifth outputs of the frequency converter are supplied to the first, second, third and fourth inputs of the ADC, from the first, second, third and fourth outputs of which - second, third, h

Description

The utility model relates to radio engineering and can be used in monitoring systems for the radio engineering situation (RTO) as part of a ship's radar system (KRLK) or as a stand-alone device for measuring the carrier frequency and time parameters of pulsed signals of radio-emitting targets (RIC), as well as to ensure constant functional monitoring the health of the component parts of the device and KRLK.

Known digital frequency meter according to the patent of the Russian Federation for utility model No. 2325665, 2008, IPC ⁸ G01R 23/00, publ. Bull. No. 7, 2008, containing a series-connected high-frequency amplifier, a band-pass filter, a frequency discriminator with four outputs, as well as analog-to-digital converters (ADC) and a computer, the amplifier input being the input of the device, the output of each ADC connected to the inputs a calculator, logarithmic video amplifiers (LVL), an analog adder, a pulse signal detector, a power code generating unit, a correction code generating unit, and a digital adder, while the input of each TLD is connected to the outputs of the clock total discriminator, the output of each LAN is connected to the input of the corresponding ADC and the inputs of the analog adder, the output of the analog adder is connected to the input of the detector, the output of the detector is connected to the clock input of all the ADCs, the output of each ADC is connected to the inputs of the computer and the inputs of the power code generation, the output of the computer is connected to the input of the block generating the correction code and the input of the digital adder, the output of the block forming the power code is connected to another input of the block forming the correction code, the output of the block Ia correction code is connected to another input of the digital adder, a digital output of the adder is the output frequency of the meter.

The known meter is built with a logarithmic input amplifier and a phase signal processing method, which is based on multiplying the direct and delayed signals in a quadrature phase detector with subsequent digital processing, and can be used in PTO monitoring systems as part of a complex or as an autonomous carrier frequency measuring device pulse signals.

Such a construction has found sufficient distribution in various passive systems. However, despite the significant advantages over the traditional construction with an amplifier-limiter without a synchronous interference detector, the frequency is measured using a frequency discriminator that converts the frequency of the input signal into amplitude and, in principle, cannot be performed using two or more signals simultaneously existing at the input, and The proposed compensation schemes only allow suppressing interference, which, in essence, is a useful signal from the point of view of observing the PTO. In addition, the detection is carried out by the video signal, which is the envelope of the input signal in a fairly wide frequency range, which significantly limits the sensitivity of the system.

The disadvantages of the known frequency meter are limited functionality, namely the impossibility of determining the parameters of two or more simultaneously existing signals in the same frequency range, low sensitivity due to the detection of signals in the time domain in a wide frequency band, and the impossibility of functional control of the components of the device and complex.

The tasks to be solved are:

- providing the ability to determine the parameters of two or more simultaneously existing signals in the same frequency range by frequency selection (selection, selection), identification (identification, identification) and subsequent classification of the RIC from a wider frequency range and making an operational decision when observing the RTO, through broadband transponder (ШПТ), intermediate frequency converter (ППЧ), lighting unit of current radio-technical situation (BOTRTO) and screen, direction finding of signals, if any For information on the angular position of the antenna, allocation of periods of the pulse signal, the detection and tracking of radio sources (IRI) and measurement of complex signals with separation modulation laws;

- increase the sensitivity (accuracy) of the measurement by introducing at least three high-frequency keys (VCHK), at least three high-frequency attenuators (VCHA) and a power divider (DM);

- ensuring constant functional monitoring of the operation of the component parts of the device and KRLK due to the additional introduction of the second LDLU, as well as at least two more power dividers (DM), and, accordingly, the functional control device (UFK).

To achieve this goal, it is advisable to transfer measurements from the plane of video signals to the plane of radio measurements, measure the frequency and parameters of signals using spectral analysis methods in the frequency domain, using the technique of processing radio signals using discrete conversion of samples from the ADC output.

The essence of the utility model lies in the fact that in the instrument of frequency selection and identification of the RIC KRLK with a functional control device (UFK) containing a high-frequency amplifier (UHF), a pass-pass filter (PPF), a logarithmic detector-video amplifier (LDVU), analog a digital converter (ADC) and a calculator, which additionally includes a second LDLU, as well as at least three high-frequency keys (VCHK), at least three high-frequency attenuators (VChA), a broadband transponder (SHPT), at least three de power amplifier (DM), an intermediate frequency converter (IF), the current radio environment lighting unit (BOTRTO), the screen and the aforementioned UFK, while the signals from the RIC received by the radar antenna KRLK through the first, second and third VCHK and the first, second and third RFs are fed to the inputs of the ШПТ, from the output of which the signals are fed to the input of the first DM, from the first output of the first DM, the signals are fed to the input of the UHF, from which the signals are fed to the input of the first LDPU via the PPF, and the signals from the output of the first LDD are input to the second DM, and with of its first output, to the fifth input of the ADC, from the second output of the first DM, the signals are fed to the input of the frequency converter, then from the first output of the frequency converter, the signals are fed to the input of the second LDDU, from the output of the second LDVD the signals are fed to the input of the third DM, and from its first output to the first input of the computer, at the same time the signals from the second, third, fourth and fifth outputs of the frequency converter are supplied respectively to the first, second, third and fourth inputs of the ADC, from the first, second, third and fourth outputs of which are sent to the second, third, fourth and fifth inputs of the computer but Then, from the output of the calculator, the processed signals are sent to BOTRTO with data displayed on the screen for identification with subsequent classification of the RIC and making an operational decision, and in the process, the UFK receives signals from the second outputs of the second and third DM, evaluates their current parameters and constantly monitors the functioning component parts of the device and KRLK.

The essence of the utility model is illustrated by the structural diagram,

Where:

1, 2, 3 - high-frequency keys (VCHK),

4, 5, 6 - high-frequency attenuators (RFA),

7 - broadband transponder (SHPT),

8, 9, 10 - power dividers (DM),

11 - high frequency amplifier (UHF),

12 - band-pass filter (PPF),

13, 14 - logarithmic detector-video amplifiers (LDVU),

15 is an intermediate frequency Converter (IFR),

16 - analog-to-digital Converter (ADC),

17 - calculator,

18 - block lighting of the current radio environment (BOTRTO),

19 is a screen

20 is a functional control device.

The operation of the inventive device of frequency selection and identification with a functional control device is as follows.

High-frequency signals from the RIC * ( ^{*) are} not shown in the diagram) received by the radar antenna * KRLK *, depending on the frequency range, are fed to the corresponding high-frequency ones 1, 2, 3, where the frequency subbands are decoupled to reduce noise and signal leakage to increase sensitivity the receiver *, and to the corresponding RFA 4, 5, 6, where the amplitude-frequency characteristics (AFC) are equalized between the frequency ranges and the dynamic range of the channel is increased, then the signals are fed to the input of ШПТ 7, where these signals are transferred from different frequency ranges to one fixed band, then the signal is fed to the input of the first DM 8, where the power is divided (to output part of the IFR 15 signal), while some of the signals from the first output of the first DM 8 are fed to UHF 11 where amplification occurs, in PPF 12, where they are additionally filtered and subjected to signal envelope separation, and then in LDLU 13, where additional amplification takes place, and in the second DM 9, where the signal is divided by power (to transfer part of the signals to the UVC 20), at the same time From the second output of the first DM 8, part of the power-separated signals are fed to the IFP 15, where they are fragmented for detailed processing and measurement of parameters, after which the analog signals from the first output of the second DM 9 and from the second, third, fourth, and fifth outputs of the IFP 15 are received respectively, to the fifth, first, second, third and fourth inputs of the ADC 16 for analog-to-digital conversion (for matching with the digital processing system of the calculator 17), at the same time from the first output of the frequency converter 15 part of the signals goes to the second LDLU 14, where additional amplification occurs, and in the third DM 10, where the signal is divided by power (to send part of the signals to the UFK 20), part of the analog signals from the first output of the third DM 10 are fed to the first input of the calculator 17 for external control of the signal envelope in a wide frequency band , thereby providing additional control over the measurement of parameters obtained at the carrier frequency and the envelope of the signals, after which part of the converted digital signals from the second, third, fourth and fifth outputs of the ADC 16 are received respectively about the first, second, third and fourth inputs of the calculator 17, where they undergo sequential discrete transformations to select the spectra, narrow the reception band to the spectral width and provide quasi-consistent filtering, after which signal parameters such as spectral width, modulation type are measured with high accuracy , modulation parameters, temporal parameters of signals and energy parameters of signals, after measurements, the calculator 17 forms forms, which in addition to signal parameters contain relative time the signal fixing signal, as well as the bearing (or the angular position of the antenna *), calculated as the center of mass of the energy parameters of the signal upon preliminary input of the antenna system data to the calculator 17 *, after which the processed data from the output of the calculator 17 is sent to BOTRTO 18 with the data displayed on the screen 19 for identification with the subsequent classification of the RIC and making an operational decision, moreover, in the process, the UFK 20 receives signals from the second outputs of the second DM 9 and the third DM 10, evaluates their current parameters and It constantly monitors the functioning of the component parts of the device * and KRLK *.

The technical result of using the utility model is:

- in providing the ability to determine the parameters of two or more simultaneously existing signals in the same frequency range;

- in increasing the sensitivity (accuracy) of the measurement;

- in ensuring constant functional control of the operation of the component parts of the device and the ship's radar complex (KRLK).

The specified technical result is achieved by a set of distinctive features, namely:

- the introduction of a broadband transponder (ШПТ), an intermediate frequency converter (ППЧ), a lighting unit for the current radio engineering situation (BOTRTO) and a screen;

- the introduction of at least three high-frequency keys (VCHK), at least three high-frequency attenuators (VCHA) and a power divider (DM);

- the introduction of a second logarithmic detector-video amplifier (LDLU), as well as at least two more power dividers (DM) and a functional control device (UFK).

The presented description and diagram of the claimed device allows, using materials, technologies and purchased products known in instrument engineering, to manufacture it industrially and use it to monitor the radio technical situation as part of the complex or as an autonomous device for measuring the carrier frequency, as well as the time parameters of pulse signals.

Claims (1)

A device for frequency selection and identification of radio-emitting targets (RIC) of a shipborne radar system (CRL) with a functional control device (UFC), containing a high-frequency amplifier (UHF), a pass-through filter (PPF), a logarithmic detector-video amplifier (LDVU), and an analog- a digital converter (ADC) and a computer, characterized in that a second LDLU, as well as at least three high-frequency keys (VCHK), at least three high-frequency attenuators (VChA), a broadband transp onator (ШПТ), at least three power dividers (DM), an intermediate frequency converter (ППЧ), an illumination unit for the current radio engineering situation (BOTRTO), a screen and the aforementioned UFK, while the signals from the RIC received by the radar antenna KRLK through the first the second and third HF and the first, second and third HF, are fed to the inputs of the ШПТ, from the output of which the signals are fed to the input of the first DM, from the first output of the first DM, the signals are fed to the input of the UHF, from which the signals are fed to the input of the first LDHU through the PPF, from the output of the first LDLU signal The signals are fed to the input of the second DM, and from its first output, to the fifth input of the ADC, from the second output of the first DM, the signals are fed to the input of the frequency converter, then from the first output, the frequency converter is fed to the input of the second LDDU, from the output of which the signals are fed to the input of the third DM , and from the first output of the third DM - to the first input of the calculator, simultaneously the signals from the second, third, fourth and fifth outputs of the frequency converter are supplied to the first, second, third and fourth inputs of the ADC, from the first, second, third and fourth outputs of which - second, third, h the fourth and fifth inputs of the calculator, and then, from the output of the calculator, the processed signals are sent to BOTRTO with displaying data on the screen for identification with subsequent classification of the RIC and making an operational decision, and in the process, the UFK receives signals from the second outputs of the second and third DMs, evaluates them current parameters and carries out constant monitoring of the functioning of the components of the device and KRLK.

Images