CN107181541A - A kind of electromagnetic spectrum monitoring receiver self-checking circuit and receiver - Google Patents
A kind of electromagnetic spectrum monitoring receiver self-checking circuit and receiver Download PDFInfo
- Publication number
- CN107181541A CN107181541A CN201710343242.4A CN201710343242A CN107181541A CN 107181541 A CN107181541 A CN 107181541A CN 201710343242 A CN201710343242 A CN 201710343242A CN 107181541 A CN107181541 A CN 107181541A
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- receiver
- electromagnetic spectrum
- signal
- spectrum monitoring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/21—Monitoring; Testing of receivers for calibration; for correcting measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/20—Monitoring; Testing of receivers
- H04B17/29—Performance testing
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Circuits Of Receivers In General (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Tests Of Electronic Circuits (AREA)
Abstract
The invention discloses a kind of electromagnetic spectrum monitoring receiver self-checking circuit and receiver, wherein, the self-checking circuit includes excitation clock generating unit, it includes the frequency multiplier being connected in series and bandpass filter, the frequency multiplier is using the clock reference signal of receiver itself as input signal, carry out being sent to bandpass filter after process of frequency multiplication, the centre frequency of the bandpass filter is the pumping signal of excitation clock generating unit output；And comb wave generating unit, it produces the self-test signal of broadband pectination using pumping signal as input；And amplitude adjusting elements, it is used to realize that the amplitude for the broadband pectination self-test signal for producing the comb wave generating unit is calibrated.
Description
Technical field
Field is received the invention belongs to electromagnetic spectrum, more particularly to a kind of electromagnetic spectrum monitoring receiver self-checking circuit and is connect
Receipts machine.
Background technology
The basic ideas of electromagnetic spectrum monitoring receiver self-inspection are that calibration source is designed in receiver.Receiver normal work
During, the calibration source is bypassed；In process of self-test, the output signal of the calibration source is gated by the form such as switching, into connecing
The conversion path of receipts machine.On the basis of calibration source output signal, by measuring comparison to the signal, receiver is found in time
Malfunction.
Electromagnetic spectrum monitoring receiver needs the electromagnetic spectrum situation in long-time continuous monitoring space.To ensure monitoring process
It is normally carried out, it is necessary to which its working condition of periodic detection, finds the unusual condition of monitoring receiver in time.Current electromagnetic spectrum monitoring
The conventional detection method of receiver can be divided into detection and automatic detection manually.The former needs technical staff by radio-frequency signal source
Manual test is carried out at receiver deployment scene Deng tester, existence time and human cost are high, fault discovery is not in time etc.
Problem；The latter realizes the self-test of receiver by configuring calibration source in receiver.Skill of the prior art based on frequency synthesis
Art scheme, the radiofrequency signal of frequency needed for being produced by phaselocked loop, Direct Digital Frequency Synthesizer Technology, signal is controlled by amplitude feedback
Circuit, calibration signal amplitude.In process of self-test, by changing the configuration parameter in frequency synthesizer circuit, change calibration signal frequency
Rate, so that the test for the receipts machine difference monitoring frequency range that achieves a butt joint, the complicated technology realization, cost is high.
In summary, there is following defect in existing electromagnetic spectrum monitoring receiver self-checking circuit：
(1) the usual monitoring frequency scope of electromagnetic spectrum monitoring receiver is wide, and self-inspection needs the calibration source frequency range produced
Need to adapt to therewith, the radio-frequency devices cost such as required crystal oscillator, lock phase chip is higher；
(2) technical scheme is complicated, and self-checking circuit reliability can not be substantially better than receiver reliability itself, self-checking circuit event
Barrier can cause the wrong report of receiver failure, disturb normal monitoring process.
The content of the invention
, should the invention provides a kind of electromagnetic spectrum monitoring receiver self-checking circuit in order to solve the deficiencies in the prior art
The cost of electromagnetic spectrum monitoring receiver self-checking circuit is low and stability is high.
The electromagnetic spectrum monitoring receiver self-checking circuit of the present invention, including：
Clock generating unit is encouraged, it includes the frequency multiplier being connected in series and bandpass filter, the frequency multiplier is to receive
The clock reference signal of machine itself is input signal, and bandpass filter, the bandpass filter are sent to after carrying out process of frequency multiplication
Centre frequency for excitation clock generating unit output pumping signal；And
Comb wave generating unit, it produces the self-test signal of broadband pectination using pumping signal as input；And
Amplitude adjusting elements, it is used for the width for realizing the broadband pectination self-test signal produced to the comb wave generating unit
Degree is calibrated.
Further, the bandpass filter is LC bandpass filters.
Wherein, LC bandpass filter centre frequencies are design exciting signal frequency, for other frequencies for avoiding frequency multiplier from exporting
Spectral component enters next stage circuit unit, causes subharmonic and intermodulation product, and the wave filter should to other spectrum component degree of suppression
Reach more than 20dB.
Further, the comb wave generating unit includes clock distribution integrated circuit, the clock distribution integrated circuit
Comprising input all the way and two-way output, for realizing input sine wave clock signal to the level conversion of ECL level high-frequency clocks
Function.
Further, output end phase of the input all the way of the clock distribution integrated circuit with encouraging clock generating unit
Even, the two-way output of clock distribution integrated circuit is connected with a NOR gate circuit respectively.
Wherein, NOR gate circuit uses the XOR gate of ECL level standards, with respect to other level standards, ECL level gate circuits
With more speed, maximum operation frequency can reach more than 3GHz, and rise and fall time can reach 100ps magnitudes.
Further, the clock distribution integrated circuit also includes delay adjustment circuit.
Wherein, the delay adjustment circuit possesses the delay adjusting ability of 100ps magnitude resolution ratio, so that two-way ECL is electric
Mean-time clock relative time delay τ is adjusted between 100ps~300ps.
Further, the amplitude adjusting elements are made up of the digital pad and amplifier being connected in series.
The self-test signal that the present invention is produced by digital pad to ECL gate circuits carries out amplitude calibration, reduction amplitude school
Accurate complexity.To improve self-test signal amplitude, self-test signal is further amplified by amplifier.
Further, the digital pad is using 5bit and the type of the above, the attenuation range with 31dB and the above,
So as to make the self-test signal of different frequency that there is identical range value by adjusting attenuation.
Further, the amplifier uses intermediate power amplifier, and OIP3 is higher than+30dBm.Can so self-inspection be avoided to believe
Number each harmonic produce the larger intermodulation product of amplitude after amplifier, influence final signal amplitude.
There is provided a kind of receiver also based on electromagnetic spectrum monitoring receiver self-checking circuit described above by the present invention.
A kind of receiver of the present invention, including electromagnetic spectrum monitoring receiver self-checking circuit described above.
Further, the receiver is also built-in with calibration source.By configuring calibration source in receiver, receiver is realized
Self-test.
Compared with prior art, the beneficial effects of the invention are as follows：
(1) present invention carries out process of frequency multiplication, increase is final to be produced by frequency multiplier and wave filter to the clock reference of complete machine
Self-test signal in each harmonic spacing, it is to avoid spacing near harmonic signal excessively produces intermodulation signal influence most in the amplifier
The amplitude flatness of whole signal；
(2) present invention produces two-way relative time delay adjustable by the clock distribution circuit of integrated delay adjustment circuit
LVPECL level signals, simplify the processing procedure of ECL gate circuit input signals；
(3) this self-test signal produced by digital pad to ECL gate circuits of the present invention carries out amplitude calibration, reduces width
Spend the complexity of calibration；
(4) present invention is based on digital device, it is not necessary to which the radio-frequency devices such as crystal oscillator, lock phase chip, cost is low；Skill
Art scheme is simple, and stability is high.
Brief description of the drawings
The Figure of description for constituting the part of the application is used for providing further understanding of the present application, and the application's shows
Meaning property embodiment and its illustrate be used for explain the application, do not constitute the improper restriction to the application.
Fig. 1 is a kind of structural representation of electromagnetic spectrum monitoring receiver self-checking circuit.
Embodiment
It is noted that described further below is all exemplary, it is intended to provide further instruction to the application.Unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
Fig. 1 is the structural representation of electromagnetic spectrum monitoring receiver self-checking circuit,
As shown in figure 1, the electromagnetic spectrum monitoring receiver self-checking circuit of the present invention, including：
Clock generating unit 1 is encouraged, it includes the frequency multiplier being connected in series and bandpass filter, the frequency multiplier is to receive
The clock reference signal of machine itself is input signal, and bandpass filter, the bandpass filter are sent to after carrying out process of frequency multiplication
Centre frequency for excitation clock generating unit output pumping signal；And
Comb wave generating unit 2, it produces the self-test signal of broadband pectination using pumping signal as input；And
Amplitude adjusting elements 3, it is used to realize to the broadband pectination self-test signal of comb wave generating unit generation
Amplitude is calibrated.
In excitation clock generating unit 1：
The frequency multiplication exponent number of frequency multiplier is calculated and obtained according to receiver clock reference frequency and design exciting signal frequency.
Bandpass filter is LC bandpass filters.LC bandpass filter centre frequencies are design exciting signal frequency, to keep away
Other spectrum components for exempting from frequency multiplier output enter next stage circuit unit, cause subharmonic and intermodulation product, the wave filter pair
Other spectrum component degree of suppression should reach more than 20dB.
The excitation clock signal that comb wave generating unit 2 is produced using prime produces broadband comb wave signal as input.
Comb wave generating unit 2 is made up of clock distribution integrated circuit and high speed gate circuit.Clock distribution integrated circuit bag
Containing input all the way and two-way output, realize input sine wave clock signal to the level conversion work(of LVPECL level high-frequency clocks
Energy.
Meanwhile, clock distribution IC interior includes delay adjustment circuit, and the time delay for possessing 100ps magnitude resolution ratio is adjusted
Power is saved, so that two-way ECL level clocks relative time delay τ is adjusted between 100ps~300ps.
High speed gate circuit uses the XOR gate of ECL level standards, and with respect to other level standards, ECL level gate circuits have
More speed, maximum operation frequency can reach more than 3GHz, and rise and fall time can reach 100ps magnitudes.
The two-way ECL level clocks f that clock distribution integrated circuit is produced enters XOR gate, and the output cycle is t/2, and pulse is wide
Spend the periodic pulse signal for τ.Signal amplitude is concentrated at 2N*f Frequency points the signal in a frequency domain, wherein, N is 1,2,3 ...；
With abundant harmonic component, so as to produce the self-test signal in broadband.When relative time delay τ is between 100ps~300ps, harmonic wave
Component can keep preferable signal amplitude in 6GHz band above, be received so as to meet currently conventional electromagnetic spectrum monitoring
Frequency range requirement of the machine to self-test signal.
Amplitude adjusting elements 3 are made up of digital pad and amplifier, realize the self-inspection produced to comb wave generating unit 2
The amplitude calibration of signal.
Be about 20dB with minimum signal amplitude difference because the self-test signal of input is maximum, digital pad use 5bit and with
On type, the attenuation range with 31dB and the above, so that making the self-test signal of different frequency by adjusting attenuation has
Identical range value.To improve self-test signal amplitude, self-test signal is further amplified by amplifier.
For each harmonic that avoids self-test signal produce the larger intermodulation product of amplitude after amplifier, influence is final
Signal amplitude, amplifier uses intermediate power amplifier, and OIP3 is higher than+30dBm.
The amplitude calibration process of self-test signal is：
The measurement power accuracy for carrying out electromagnetic spectrum monitoring receiver by outside source first is calibrated, afterwards will be certainly
Examine signal and input the receiver after calibration, the self-test signal amplitude of each Frequency point is measured successively.By changing amplitude adjusted
Digital pad in unit, makes self-test signal amplitude reach design requirement, and the pad value at each Frequency point is preserved, as
The amplitude calibration data of self-test signal.
The present invention carries out process of frequency multiplication by frequency multiplier and wave filter to the clock reference of complete machine, what increase was finally produced
The spacing of each harmonic in self-test signal, it is to avoid it is final that spacing near harmonic signal excessively produces intermodulation signal influence in the amplifier
The amplitude flatness of signal；
The present invention produces two-way relative time delay adjustable LVPECL by the clock distribution circuit of integrated delay adjustment circuit
Level signal, simplifies the processing procedure of ECL gate circuit input signals；
This self-test signal produced by digital pad to ECL gate circuits of the invention carries out amplitude calibration, reduces amplitude
The complexity of calibration；
The present invention is based on digital device, it is not necessary to which the radio-frequency devices such as crystal oscillator, lock phase chip, cost is low；Technology
Scheme is simple, and stability is high.
There is provided a kind of receiver also based on electromagnetic spectrum monitoring receiver self-checking circuit as shown in Figure 1 by the present invention.
A kind of receiver of the present invention, including electromagnetic spectrum monitoring receiver self-checking circuit as shown in Figure 1.
Wherein, receiver is also built-in with calibration source.By configuring calibration source in receiver, testing oneself for receiver is realized
Examination.
Although above-mentioned the embodiment of the present invention is described with reference to accompanying drawing, not to present invention protection model
The limitation enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme those skilled in the art are not
Need to pay various modifications or deform still within protection scope of the present invention that creative work can make.
Claims (10)
1. a kind of electromagnetic spectrum monitoring receiver self-checking circuit, it is characterised in that including：
Encourage clock generating unit, it includes the frequency multiplier being connected in series and bandpass filter, the frequency multiplier with receiver oneself
The clock reference signal of body is input signal, is sent to after carrying out process of frequency multiplication in bandpass filter, the bandpass filter
The pumping signal that frequency of heart exports for excitation clock generating unit；And
Comb wave generating unit, it produces the self-test signal of broadband pectination using pumping signal as input；And
Amplitude adjusting elements, it is used to realize that the amplitude for the broadband pectination self-test signal for producing the comb wave generating unit is entered
Row calibration.
2. a kind of electromagnetic spectrum monitoring receiver self-checking circuit as claimed in claim 1, it is characterised in that the bandpass filtering
Device is LC bandpass filters.
3. a kind of electromagnetic spectrum monitoring receiver self-checking circuit as claimed in claim 1, it is characterised in that the comb wave hair
Raw unit includes clock distribution integrated circuit, and the clock distribution integrated circuit includes input all the way and two-way output, for reality
Level conversion function of the existing input sine wave clock signal to ECL level high-frequency clocks.
4. a kind of electromagnetic spectrum monitoring receiver self-checking circuit as claimed in claim 3, it is characterised in that the clock distribution
The input all the way of integrated circuit is with encouraging the output end of clock generating unit to be connected, the two-way output point of clock distribution integrated circuit
It is not connected with a NOR gate circuit.
5. a kind of electromagnetic spectrum monitoring receiver self-checking circuit as claimed in claim 3, it is characterised in that the clock distribution
Integrated circuit also includes delay adjustment circuit.
6. a kind of electromagnetic spectrum monitoring receiver self-checking circuit as claimed in claim 1, it is characterised in that the amplitude adjusted
Unit is made up of the digital pad and amplifier being connected in series.
7. a kind of electromagnetic spectrum monitoring receiver self-checking circuit as claimed in claim 6, it is characterised in that the digital attenuation
Device is using 5bit and the type of the above, the attenuation range with 31dB and the above, so as to make different frequency by adjusting attenuation
Self-test signal there is identical range value.
8. a kind of electromagnetic spectrum monitoring receiver self-checking circuit as claimed in claim 6, it is characterised in that the amplifier is adopted
With intermediate power amplifier, OIP3 is higher than+30dBm.
9. a kind of receiver, it is characterised in that including the electromagnetic spectrum monitoring receiver as any one of claim 1-8
Self-checking circuit.
10. a kind of receiver as claimed in claim 9, it is characterised in that the receiver is also built-in with calibration source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710343242.4A CN107181541B (en) | 2017-05-16 | 2017-05-16 | Electromagnetic spectrum monitoring receiver self-checking circuit and receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710343242.4A CN107181541B (en) | 2017-05-16 | 2017-05-16 | Electromagnetic spectrum monitoring receiver self-checking circuit and receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107181541A true CN107181541A (en) | 2017-09-19 |
| CN107181541B CN107181541B (en) | 2021-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710343242.4A Active CN107181541B (en) | 2017-05-16 | 2017-05-16 | Electromagnetic spectrum monitoring receiver self-checking circuit and receiver |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110996076A (en) * | 2019-12-20 | 2020-04-10 | 电子科技大学 | Satellite television signal abnormity warning method |
| CN111505736A (en) * | 2020-04-30 | 2020-08-07 | 中国地质大学（北京） | Calibration method of underwater measuring device and underwater detection system |
| CN112217536A (en) * | 2020-11-30 | 2021-01-12 | 成都泰格微电子研究所有限责任公司 | Radio frequency front end of satellite ground station and self-checking method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110996076A (en) * | 2019-12-20 | 2020-04-10 | 电子科技大学 | Satellite television signal abnormity warning method |
| CN111505736A (en) * | 2020-04-30 | 2020-08-07 | 中国地质大学（北京） | Calibration method of underwater measuring device and underwater detection system |
| CN112217536A (en) * | 2020-11-30 | 2021-01-12 | 成都泰格微电子研究所有限责任公司 | Radio frequency front end of satellite ground station and self-checking method thereof |
| CN112217536B (en) * | 2020-11-30 | 2024-03-08 | 成都泰格微电子研究所有限责任公司 | Radio frequency front end of satellite ground station and self-checking method thereof |
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| Publication number | Publication date |
|---|---|
| CN107181541B (en) | 2021-01-22 |
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