CN104809944A - Orthogonal receiver comprehensive experiment device - Google Patents
Orthogonal receiver comprehensive experiment device Download PDFInfo
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- CN104809944A CN104809944A CN201510188668.8A CN201510188668A CN104809944A CN 104809944 A CN104809944 A CN 104809944A CN 201510188668 A CN201510188668 A CN 201510188668A CN 104809944 A CN104809944 A CN 104809944A
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Abstract
The invention relates to an orthogonal receiver comprehensive experiment device. The orthogonal receiver comprehensive experiment device comprises a functional circuit board, a secondary power source module and an operation panel. An input signal interface is arranged on the upper surface of the operation panel, an output signal interface is arranged on the lower bottom surface of the operation panel and connected with the input end of the functional circuit board, and the power supply output end of the secondary power source module is connected with the power supply end of the functional circuit board. The functional circuit board comprises a random noise generation module, a signal addition and conversion module, a reference signal generation module, an orthogonal reference component generation module, a frequency mixing module, a band-pass filtering module, a full-wave rectification module, a square summation module, an integral module, a threshold generation module and a threshold comparison module. According to the orthogonal receiver comprehensive experiment device, the target signal detection function and the parameter estimation function involved by radar and sonar search system time-domain signal processing are fulfilled, an autonomic research type experiment and a comprehensive design type experiment are established on the basis of the functions, and the application range of an existing experiment device is greatly broadened.
Description
Technical field
The present invention relates to acquisition of signal and the parameter estimation techniques field of the applications such as radar, sonar, communication, refer to that a kind of realization take quadrature receiver as the quadrature receiver comprehensive experimental device of core particularly.
Background technology
Target detection and parameter estimation techniques are one of core technologies of the precision guided weapon such as guided missile, torpedo, are also one of core curriculum of relevant art.Modern precision guided weapon completes primarily of receiver the detection of target and identification, and current application the most widely receiver form is quadrature receiver.Realizing the understanding of target detection and parameter estimation principle and characteristics and grasp is one of the basic content that must grasp of target detection and parameter estimation correlated curriculum.The understanding of the receipts that how to achieve a butt joint machine principle of work and process and grasp, quadrature receiver principle of work is a crucial ring.In existing correlated curriculum education activities, the modes such as theoretical instruction, the derivation of equation are adopted substantially for the explanation of quadrature receiver principle of work, lack easy experimental provision intuitively to demonstrate whole quadrature receiver principle of work and process, measure and operate, the actual functional capability circuit abnormality of existing relevant weaponry is complicated simultaneously, be not suitable for classroom instruction to use, directly affect teaching efficiency.Simple theory explaination and the derivation of equation are difficult to the object reaching students precision guided weapon target detection and method for parameter estimation and principle.
Summary of the invention
For the deficiency existed in above-mentioned target detection and parameter estimation related content teaching means, the present invention proposes one and mounts and dismounts quadrature receiver comprehensive experimental device simply and easily, the stage realizing quadrature receiver signal processing is shown, comprise " be multiplied---filtering---rectification---thresholding compares summed square---integration---", for offering input based on quadrature receiver and parameter estimation experiment.
The invention provides a kind of quadrature receiver comprehensive experimental device, comprise and be arranged on functional circuit plate in cabinet and secondary power supply module, and be arranged on the guidance panel on machine box surface; Described guidance panel upper surface is provided with input signal interface, described guidance panel bottom surface is provided with output signal interface, described output signal interface is connected with the input end of functional circuit plate, and the power supply output terminal of described secondary power supply module is connected with the feeder ear of functional circuit plate; Described functional circuit plate comprises: random noise generation module, for providing white Gaussian noise signal; Signal plus and conversion module, the white Gaussian noise signal exported for the sinusoidal signal that will guidance panel input and random noise generation module is superimposed, produces the input signal comprising noise; Reference signal generation module, for providing square-wave signal, its signal frequency 2 times of reference signal needed for quadrature receiver process; Orthogonal reference component generation module, for being processed by square-wave signal, produces the reference signal of two-way phase 90 °; Frequency mixing module, for the input signal after obtaining two-way mixing that is multiplied with the reference signal of two-way phase 90 ° by the input signal comprising noise; Bandpass filtering modules block, for the irrelevant frequency range in the input signal after two-way mixing being filtered, obtains the input signal of special frequency channel; Full-wave rectification block, for being treated to the rectified signal of amplitude limit by the input signal of setting frequency range; Summed square module, for being treated to the signal of a road with fluctuation by the rectified signal of two-way amplitude limit; Integration module, for by the signal transacting with fluctuation being the signal of an approximate DC; Thresholding generation module, for providing a precision voltage reference signal, its magnitude of voltage is adjusted by the Control of Voltage button control on guidance panel; Thresholding comparison module, for the signal of direct current and reference voltage signal being compared, comparative result is undertaken measuring or showing by guidance panel.
Further, the upper surface of described guidance panel is provided with external electric supply socket, fuse, power switch, external power status indicator lamp, secondary power supply status indicator lamp, signal access socket, four grounded socket, noise setting pot, noise access switch, filter configuration waver, threshold sets pot, output state pilot lamp and at least 15 measuring point terminals.
Further, described random noise generation module utilizes Zener diode punch-through effect to produce broadband noise signal through amplifying, the amplitude of random noise generation module is adjusted by guidance panel, described random noise generation module output terminal with access switch by the noise on guidance panel between signal plus with conversion module input end and be connected.
Further, described reference signal generation module produces square-wave signal by single-chip microcomputer, and its signal frequency is set by the filter configuration waver on guidance panel, this frequency 2 times of reference signal needed for quadrature receiver process.
Further, described orthogonal reference component generation module is the frequency dividing circuit of reverser and J-K flip flop composition, by producing signal one tunnel paraphase and two divided-frequency process to single-chip microcomputer, forms the reference signal of two-way phase 90 °.
Further, described frequency mixing module is made up of analog switch chip, input end connection signal addition simultaneously and conversion module, the reference component generation module of described frequency mixing module, the output signal of orthogonal reference component generation module is outputed signal, the common multiplying realizing input mixed signal and orthogonal reference signal by signal plus and conversion module.
Further, described bandwidth-limited circuit is made up of LTC1164 chip and periphery configure resistance, realizes the bandpass filtering of special frequency channel, and described full-wave rectifying circuit is made up of bridge-type detector diode and operation amplifier circuit, realizes amplitude limit full-wave rectification detection.
Further, described summed square circuit is the adding circuit of operational amplifier composition, and complete the function asking signal summed square, described integrating circuit is the integrating circuit be made up of resistance capacitance, completes the integral operation to signal after summed square.
Further, described thresholding produces circuit and is made up of high-accuracy voltage source chip and adjustable potential meter, realize the generation of reference voltage signal, and export by the threshold sets pot adjustment doors voltage limit on guidance panel, described thresholding comparator circuit is made up of voltage comparator chip, completes the comparison to integrated signal and threshold voltage signal and output.
Further, described quadrature receiver functional circuit plate and secondary power supply module are bolted on the base plate of cabinet inside, guidance panel is connected with quadrature receiver functional circuit plate with connector by electric connection line, and guidance panel is connected with secondary power supply module by electric connection line.
The principle of work of quadrature receiver comprehensive experimental device of the present invention is as follows:
Quadrature receiver comprehensive experimental device carries out step-by-step processing to the signal that outside inputs, and finally intactly reproduces quadrature receiver to probability-based classification and processing procedure.Specific as follows: the signal that the outside source accessed by guidance panel produces, by switch control rule, superimposed with the random noise of degree of amplitude modulation, the reference signal of the two-way phase then produced with experimental provision self respectively 90 ° carries out mixing, mixed signal obtains the two-way input signal of special frequency channel through the bandpass filtering modules block of knob control center frequency, again through full-wave rectification, the input signal of special frequency channel is treated to the rectified signal of amplitude limit, again by summed square module, the rectified signal of two-way amplitude limit is treated to the signal of a road with fluctuation, again Integral Processing is carried out to it, obtain the signal of an approximate DC, the adjustable precision voltage reference signal that this signal and experimental provision inside provide is compared, finally comparative result is undertaken measuring or showing by guidance panel.
Quadrature receiver comprehensive experimental device of the present invention adopts technique scheme, and tool has the following advantages:
By reference to signal generator module, random noise generation module, quadrature component generation module, frequency mixing module, bandpass filtering modules block, full-wave rectification block, summed square module, the combinationally using of anomalous integral thresholding comparison module, complete present quadrature receiver " be multiplied---filtering---rectification---thresholding compares summed square---integration---" calculating process, may be used for quadrature receiver principle of work related experiment teaching.
With quadrature receiver comprehensive experimental device for core, assisting by the simple general-purpose such as signal generator and oscillograph instrument, radar, target echo detection involved by sonar homing system signal procesing in time domain and parameter estimation function can be realized, and offer the autonomous Research-type such as input, parameter estimation and receiver performance characteristics measurement and the experiment of comprehensive Design formula with this, have greatly expanded the usable range of existing experimental provision.
Structure of the present invention is simple, and easy and simple to handle, Ergonomics design is excellent, possesses high reliability, and easy accessibility, for ease of maintenaince.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is quadrature receiver functional circuit plate composition frame chart of the present invention;
Fig. 3 is guidance panel schematic diagram of the present invention;
Fig. 4 is that the signal of quadrature receiver comprehensive experimental device of the present invention flows to schematic diagram.
1-quadrature receiver functional circuit plate, 2-secondary power supply module, 3-guidance panel, 4-random noise generation module, 5-signal plus and conversion module, 6-reference signal generation module, 7-orthogonal reference component generation module, 8-frequency mixing module, 9-bandpass filtering modules block, 10-full-wave rectification block, 11-summed square module, 12-integration module, 13-thresholding generation module, 14-thresholding comparison module, 15-cabinet, 16-base plate, 17-external electric supply socket, 18-fuse, 19-power switch, 20-external power status indicator lamp, 21-secondary power supply status indicator lamp, 22-signal access socket, 23-grounding receptacle, 24-noise setting pot, 25-noise access switch, 26-filter configuration waver, 27-threshold sets pot, 28-output state pilot lamp, 29-measuring point terminal.
Embodiment
Describe performance of the present invention in detail below in conjunction with accompanying drawing illustrated embodiment, but they are not construed as limiting the invention, only for example.Simultaneously by illustrating that advantage of the present invention will become clearly and easy understand.
As shown in Figure 1, Figure 2, Figure 3 shows, quadrature receiver comprehensive experimental device of the present invention comprises and is arranged on functional circuit plate 1 in cabinet 15 and secondary power supply module 2, and is arranged on the guidance panel 3 on cabinet 15; Quadrature receiver functional circuit plate 1 and secondary power supply module 2 are bolted on the base plate 16 of cabinet 15 inside, guidance panel 3 is connected with quadrature receiver functional circuit plate 1 with connector by electric connection line, guidance panel 3 is connected with secondary power supply module 2 by electric connection line, guidance panel 3 upper surface is provided with input signal interface, guidance panel 3 bottom surface is provided with output signal interface, output signal interface is connected with the input end of functional circuit plate 1, and the power supply output terminal of secondary power supply module 2 is connected with the feeder ear of functional circuit plate 1; Functional circuit plate 1 comprises: random noise generation module 4, for providing white Gaussian noise signal; Signal plus and conversion module 5, superimposed for the white Gaussian noise signal that the sinusoidal signal of input on guidance panel 3 and random noise generation module 4 are exported, produce the input signal comprising noise; Reference signal generation module 6, for providing square-wave signal, its signal frequency 2 times of reference signal needed for quadrature receiver process; Orthogonal reference component generation module 7, for being processed by square-wave signal, produces the reference signal of two-way phase 90 °; Frequency mixing module 8, for the input signal after obtaining two-way mixing that is multiplied with the reference signal of two-way phase 90 ° by the input signal comprising noise; Bandpass filtering modules block 9, for the irrelevant frequency range in the input signal after two-way mixing being filtered, obtains the input signal of special frequency channel; Full-wave rectification block 10, for being treated to the rectified signal of amplitude limit by the input signal of setting frequency range; Summed square module 11, for being treated to the signal of a road with fluctuation by the rectified signal of two-way amplitude limit; Integration module 12, for by the signal transacting with fluctuation being the signal of an approximate DC; Thresholding generation module 13, for providing a precision voltage reference signal, its magnitude of voltage is adjusted by the Control of Voltage button control on guidance panel 3; Thresholding comparison module 14, for the signal of direct current and reference voltage signal being compared, comparative result is undertaken measuring or showing by guidance panel 3.
The upper surface of guidance panel 3 is provided with external electric supply socket 17, fuse 18, power switch 19, external power status indicator lamp 20, secondary power supply status indicator lamp 21, signal access socket 22, four grounded socket 23, noise setting pot 24, noise access switch 25, filter configuration waver 26, threshold sets pot 27, output state pilot lamp 28 and at least 15 measuring point terminals 29.
Random noise generation module 4 utilizes Zener diode punch-through effect to produce broadband noise signal through amplifying, the amplitude of random noise generation module 4 is adjusted by guidance panel 3, random noise generation module 4 output terminal with access switch 25 by the noise on guidance panel 3 between signal plus with conversion module 5 input end and be connected.Reference signal generation module 6 produces square-wave signal by single-chip microcomputer, and its signal frequency is set by the filter configuration waver 26 on guidance panel 3, this frequency 2 times of reference signal needed for quadrature receiver process.Orthogonal reference component generation module 7 is the frequency dividing circuit of reverser and J-K flip flop composition, by producing signal one tunnel paraphase and two divided-frequency process to single-chip microcomputer, forms the reference signal of two-way phase 90 °.Frequency mixing module 8 is made up of analog switch chip, input end connection signal addition simultaneously and conversion module 5, the reference component generation module 6 of frequency mixing module 8, the output signal of orthogonal reference component generation module 6 is outputed signal, the common multiplying realizing input mixed signal and orthogonal reference signal by signal plus and conversion module 5.Bandwidth-limited circuit 9 is made up of LTC1164 chip and periphery configure resistance, realizes the bandpass filtering of special frequency channel, and full-wave rectifying circuit 10 is made up of bridge-type detector diode and operation amplifier circuit, realizes amplitude limit full-wave rectification detection.The adding circuit that summed square circuit 11 forms for operational amplifier, complete the function asking signal summed square, integrating circuit 12 is the integrating circuit be made up of resistance capacitance, completes the integral operation to signal after summed square.Thresholding produces circuit 13 and is made up of high-accuracy voltage source chip and adjustable potential meter, realize the generation of reference voltage signal, and export by the threshold sets pot 27 adjustment doors voltage limit on guidance panel 3, thresholding comparator circuit 14 is made up of voltage comparator chip, completes the comparison to integrated signal and threshold voltage signal and output
Use step of the present invention is as follows:
(1) full experiment system is made up of 1 quadrature receiver comprehensive experimental device, 1 two-way oscillograph, 1 signal generator and 1 multimeter.Wherein, signal generator is for generation of analog echo signal; Quadrature receiver comprehensive experimental device is for carrying out the quadrature receiving process of echoed signal; Oscillograph is for observing the signal waveform in each stage in processing procedure; Multimeter is used for measuring basis voltage.
(2) connect the power supply of oscillograph, signal generator, start checkout facility state, confirm the normal rear output signal line connecting the oscillographic signal wire of two-way and a road signal generator.
(3) after the alternating current 220V Power supply of external experimental provision, " ~ 220V " pilot lamp will be lighted, and display external power supply is normal;
(4) connect " power supply " switch, power supply can be implemented to experimental provision.Interior voltage-stabilized power supply generation ± 12V direct supply (secondary power supply) is for internal circuit.This power supply state indicate by "+12V " and "-12V " pilot lamp, and by the measuring point of correspondence, use digital multimeter measures concrete secondary power supply magnitude of voltage.
(5) target echo signal produces by external signal generator line amplitude frequency adjustment of going forward side by side, and is introduced, and undertaken measuring and observing by " measuring point 1 " jack by " signal access " socket.The target echo signal of input is clipped to 9Vpp, in case major structure becomes subsequent conditioning circuit to damage;
(6) experimental provision self produces white Gaussian noise signal, and its amplitude is adjusted by " noise setting " pot, adjustment multiple 10 ~ 20 times.Whether the noise signal after amplification is accessed by " noise access " switch control rule; Once connect " noise access " switch, can be measured by " measuring point 2 " and observe noise signal.
(7) the simulated target echoed signal inputted and noise signal realize linear, additive in experimental provision, the target echo signal under simulation interference environment, can observe reverberation Mixed design waveform by " measuring point 3 ".
(8) reference signal is produced by the Single-chip Controlling in experimental provision, and its frequency sets by " filter configuration " waver.Based on the principle of work of switching mixer, reference signal is here square-wave signal, its waveform and transposition 90 ° after waveform, can observe respectively by " measuring point 4 " and " measuring point 5 ".
(9) input hybrid waveform and be divided into two-way, carry out switch Frequency mixing processing with the two-way reference signal of phase 90 ° respectively, the two-way waveform after mixing can be observed respectively by " measuring point 6 " and " measuring point 7 "; Two paths of signals fundamental frequency will keep 90 ° of phase differential.
(10) signal after mixing is 5kHz through centre frequency, and bandwidth is the bandpass filtering of 150Hz and amplifies process, obtains low frequency signal.Two-way waveform after filter amplifying processing can be observed respectively by " measuring point 8 " and " measuring point 9 "; Two paths of signals will keep 90 ° of phase differential.
(11) bandpass signal after filter and amplification, after full-wave rectification, can be observed respectively by " measuring point 10 " and " measuring point 11 "; Alternating component in two paths of signals will keep 90 ° of phase differential.
(12) carry out summed square to the two paths of signals of orthogonal processing, its output waveform is observed by " measuring point 12 ".
(13) carry out integration to the signal after summed square to process with amplification, obtain orthogonal processing result, its waveform is the direct current signal with certain amplitude, observes by " measuring point 13 ";
(14) experimental provision produces threshold level based on high-precision voltage reference chip, and set this threshold level value continuously by " threshold sets " pot, multimeter can be used to pass through " measuring point 14 " and to measure threshold level signal, and observe the result of adjustment thresholding.
(15) experimental provision is inner realizes comparing the signal after orthogonal processing and threshold signal by high-accuracy voltage comparator, its result is 0V low level output or+12V high level output, its state by the display of " exporting instruction " lamp, and observes signal output waveform by " measuring point 15 ".
The target-seeking systems such as, torpedo sonar homing target-seeking for missile-radars below carry out active probe to target, and principle of work of the present invention is described.Due to the modulating action of channel and target, carry target information in reflection echo, target-seeking system receiver is regained ripple by docking and is carried out space time process realization to the Detection and Parameter Estimation of target.For different target types and environmental baseline, people establish plurality of target scattering model, and wherein fluctuating point target model is used widely as a kind of model the most with practical value slowly.The form of slow fluctuating point target model is s (t)=Acos (ω t+ θ), is characterized in that the amplitude of echoed signal and phase place are random, simultaneously with time delay and Doppler shift.Wherein random amplitude A Rayleigh distributed, random phase θ obeys and is uniformly distributed.
Theoretical according to statistic mixed-state, the optimum receiver detecting random amplitude and random phase target (rise and fall point target slowly) under white Gaussian noise background is quadrature receiver, and this is also the receiver form that all kinds of target-seeking system realize target detects and parameter estimation is most widely used.Its ultimate principle is: for the target echo signal with random amplitude and random phase, utilize triangular transformation formula, it can be decomposed into two orthogonal signal, the amplitude of these two-way orthogonal signal is respectively amplitude and is respectively Acos θ and Asin θ, is random; And phase place is respectively ω t and ω t+ pi/2, be nonrandom.For such two amplitudes nonrandom signal of phase place at random, optimization process can be realized respectively with the process of two-way cross-correlator.Because the two paths of signals decomposited is orthogonal, therefore corresponding reference signal also must be orthogonal, therefore creates the structure of quadrature receiver, sees Fig. 4.
In Fig. 4, left-half has been exactly the computing cross-correlation to two-way quadrature component.But only so not enough, because the amplitude of two-way quadrature component is also respectively containing the item relevant with random phase that cos θ is such with sin θ.In order to eliminate the impact of random phase, the output of two-way correlator is carried out a square summation process, the last like this receiver obtained exports Z
2just complete and random phase has had nothing to do, and therefore achieves the optimization process under random phase condition.According to quadrature receiver mathematic(al) representation and version, its fundamental operation comprises the generation of the two-way reference signal of phase 90 °, being multiplied of input hybrid waveform and reference signal, integration, summed square, thresholding compare.Directly carry out circuit reappear its function according to " be multiplied---thresholding compares integration---summed square---" process of basic quadrature receiver.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the technology of the present invention principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a quadrature receiver comprehensive experimental device, it is characterized in that: comprise and be arranged on functional circuit plate (1) in cabinet (15) and secondary power supply module (2), and be arranged on the guidance panel (3) on cabinet (15) face; Described guidance panel (3) upper surface is provided with input signal interface, described guidance panel (3) bottom surface is provided with output signal interface, described output signal interface is connected with the input end of functional circuit plate (1), and the power supply output terminal of described secondary power supply module (2) is connected with the feeder ear of functional circuit plate (1); Described functional circuit plate (1) comprising: random noise generation module (4), for providing white Gaussian noise signal; Signal plus and conversion module (5), superimposed for the white Gaussian noise signal that the sinusoidal signal of upper for guidance panel (3) input and random noise generation module (4) are exported, produce the input signal comprising noise; Reference signal generation module (6), for providing square-wave signal, its signal frequency 2 times of reference signal needed for quadrature receiver process; Orthogonal reference component generation module (7), for being processed by square-wave signal, produces the reference signal of two-way phase 90 °; Frequency mixing module (8), for the input signal after obtaining two-way mixing that is multiplied with the reference signal of two-way phase 90 ° by the input signal comprising noise; Bandpass filtering modules block (9), for the irrelevant frequency range in the input signal after two-way mixing being filtered, obtains the input signal of special frequency channel; Full-wave rectification block (10), for being treated to the rectified signal of amplitude limit by the input signal of setting frequency range; Summed square module (11), for being treated to the signal of a road with fluctuation by the rectified signal of two-way amplitude limit; Integration module (12), for by the signal transacting with fluctuation being the signal of an approximate DC; Thresholding generation module (13), for providing a precision voltage reference signal, its magnitude of voltage is adjusted by the Control of Voltage button control on guidance panel (3); Thresholding comparison module (14), for the signal of direct current and reference voltage signal being compared, comparative result is undertaken measuring or showing by guidance panel (3).
2. quadrature receiver comprehensive experimental device according to claim 1, it is characterized in that: the upper surface of described guidance panel (3) is provided with external electric supply socket (17), fuse (18), power switch (19), external power status indicator lamp (20), secondary power supply status indicator lamp (21), signal access socket (22), four grounded socket (23), noise setting pot (24), noise access switch (25), filter configuration waver (26), threshold sets pot (27), output state pilot lamp (28) and at least 15 measuring point terminals (29).
3. quadrature receiver comprehensive experimental device according to claim 2, it is characterized in that: described random noise generation module (4) utilizes Zener diode punch-through effect to produce broadband noise signal through amplifying, the amplitude of random noise generation module (4) is by guidance panel (3) adjustment, and described random noise generation module (4) output terminal accesses switch (25) with the noise passed through on guidance panel (3) between signal plus with conversion module (5) input end and is connected.
4. quadrature receiver comprehensive experimental device according to claim 2, it is characterized in that: described reference signal generation module (6) produces square-wave signal by single-chip microcomputer, its signal frequency is set by the filter configuration waver (26) on guidance panel (3), this frequency 2 times of reference signal needed for quadrature receiver process.
5. quadrature receiver comprehensive experimental device according to claim 1 and 2, it is characterized in that: the frequency dividing circuit that described orthogonal reference component generation module (7) forms for reverser and J-K flip flop, by producing signal one tunnel paraphase and two divided-frequency process to single-chip microcomputer, form the reference signal of two-way phase 90 °.
6. quadrature receiver comprehensive experimental device according to claim 1 and 2, it is characterized in that: described frequency mixing module (8) is made up of analog switch chip, input end connection signal addition simultaneously and conversion module (5), the reference component generation module (6) of described frequency mixing module (8), the output signal of orthogonal reference component generation module (6) is outputed signal, the common multiplying realizing input mixed signal and orthogonal reference signal by signal plus and conversion module (5).
7. quadrature receiver comprehensive experimental device according to claim 1 and 2, it is characterized in that: described bandwidth-limited circuit (9) is made up of LTC1164 chip and periphery configure resistance, realize the bandpass filtering of special frequency channel, described full-wave rectifying circuit (10) is made up of bridge-type detector diode and operation amplifier circuit, realizes amplitude limit full-wave rectification detection.
8. quadrature receiver comprehensive experimental device according to claim 1 and 2, it is characterized in that: the adding circuit that described summed square circuit (11) forms for operational amplifier, complete the function asking signal summed square, described integrating circuit (12) is the integrating circuit be made up of resistance capacitance, completes the integral operation to signal after summed square.
9. quadrature receiver comprehensive experimental device according to claim 2, it is characterized in that: described thresholding produces circuit (13) and is made up of high-accuracy voltage source chip and adjustable potential meter, realize the generation of reference voltage signal, and export by threshold sets pot (27) the adjustment doors voltage limit on guidance panel (3), described thresholding comparator circuit (14) is made up of voltage comparator chip, completes the comparison to integrated signal and threshold voltage signal and output.
10. quadrature receiver comprehensive experimental device according to claim 1, it is characterized in that: described quadrature receiver functional circuit plate (1) and secondary power supply module (2) are bolted on the inner base plate (16) of cabinet (15), guidance panel (3) is connected with quadrature receiver functional circuit plate (1) with connector by electric connection line, and guidance panel (3) is connected with secondary power supply module (2) by electric connection line.
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| CN106556829A (en) * | 2016-11-03 | 2017-04-05 | 哈尔滨工程大学 | A kind of submarine target three-dimensional synchronization location receiver based on frequency hopping triple pulse coding |
| CN110940857A (en) * | 2019-12-13 | 2020-03-31 | 西安锐驰电器有限公司 | Spectrum parameter detection method |
| CN112270877A (en) * | 2020-09-29 | 2021-01-26 | 中国人民解放军海军工程大学 | Beam forming experiment system, experiment method and high-resolution detection equipment |
| CN112394419A (en) * | 2020-12-10 | 2021-02-23 | 中国人民解放军海军工程大学 | Experimental device for initiative electromagnetic detection signal processing under water |
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