CN107024618B - A kind of wide-band microwave signal based on signal autocorrelation compares phase system - Google Patents
A kind of wide-band microwave signal based on signal autocorrelation compares phase system Download PDFInfo
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- CN107024618B CN107024618B CN201610071369.0A CN201610071369A CN107024618B CN 107024618 B CN107024618 B CN 107024618B CN 201610071369 A CN201610071369 A CN 201610071369A CN 107024618 B CN107024618 B CN 107024618B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R25/00—Arrangements for measuring phase angle between a voltage and a current or between voltages or currents
- G01R25/005—Circuits for comparing several input signals and for indicating the result of this comparison, e.g. equal, different, greater, smaller, or for passing one of the input signals as output signal
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Abstract
The invention belongs to microwave technical fields, specifically disclose a kind of wide-band microwave signal based on signal autocorrelation and compare phase system.It includes: amplifier I, amplifier II, power splitter I, power splitter II, upconverter I, low-converter I, low-converter II, low-converter III, filter I, filter II, phase comparator.1 input amplifier I of channel will be passed through to the microwave signal f (ω t) than phase, 2 input amplifier II of channel will be passed through to the microwave signal f (ω t+ Δ φ) than phase, by two local oscillators, two frequency variation signals are obtained, input phase comparator is handled.The present invention is easily achieved middle frequency ratio phase, can be realized wide frequency ranges, arbitrary signal form microwave signal than phase, the reaction time is fast, realizes simple.
Description
Technical field
The invention belongs to microwave technical fields, and in particular to a kind of wide-band microwave signal based on signal autocorrelation is than mutually
System.
Background technique
Phase information is one of important information of electromagnetic wave, carries out phase information ratio to the received microwave signal of different channels
To one of the technical foundation for being direction finding technology, SAR imaging technique etc..And for signal receiver, receive the frequency of signal not
Know, waveform is changeable, this just brings great difficulty to the extraction of phase information.
In conventional signal phase difference measurement method, receive microwave signal is distinguished by two receiving channels, through over-discharge
Big device is amplified to watt level appropriate, then is measured by instantaneous frequency measurement technology to signal frequency, according to measurement result tune
Whole controllable local oscillator makes local oscillation signal be directed at incoming wave signal frequency.Microwave signal is down-converted to intermediate-freuqncy signal by down coversion, so
The phase information that two-way receives signal is extracted by intermediate frequency phase comparator afterwards.
It is insufficient that this processing method is primarily present following two aspect: needing to measure the frequency for receiving signal；Due to
Frequency measurement, control local oscillator are required to the time, therefore system reaction time is longer；Since down coversion can only realize that the frequency range of signal is removed
It moves, so if needing intermediate frequency processor to have biggish processing bandwidth when measured signal is the broadband signals such as linear frequency modulation.
Summary of the invention
The purpose of the present invention is to provide a kind of reaction time is fast, realize simply based on the wide-band microwave of signal autocorrelation
Signal can be realized wide frequency ranges, the microwave signal of arbitrary signal form compares phase than phase system.
Realize the technical solution of the object of the invention:
Than phase system, it includes: amplifier I, amplifier II, function point for a kind of wide-band microwave signal based on signal autocorrelation
Device I, power splitter II, upconverter I, low-converter I, low-converter II, low-converter III, filter I, filter II, compare phase
Device；The input terminal of channel I connection amplifier I, the input terminal of the output end connection power splitter I of amplifier I；The two-way of power splitter I
Output end is separately connected the first input end of upconverter I and the first input end of low-converter II；The second of upconverter I is defeated
Enter end connection local oscillator 1；The input terminal of the output end connection filter I of upconverter I；The output end of filter I connects down coversion
The first input end of device I；The second input terminal of low-converter I connects local oscillator 2；The output end of low-converter I connects filter II
Input terminal；The input terminal of the output end connection power splitter II of filter II；The two-way output end of power splitter II is separately connected down
The second input terminal of frequency converter II and the second input terminal of low-converter III；The input terminal interface channel 2 of amplifier II；Amplification
The first input end of the output end connection low-converter III of device II；The output end of low-converter II and low-converter III difference
Connect the input terminal of phase comparator.
The course of work of the system are as follows:
It will be divided equally after amplification in power splitter I to the microwave signal f (ω t) than phase by 1 input amplifier I of channel
For the identical signal of two-way, upconverter I is given all the way, gives low-converter II all the way；Upconverter I inputs local oscillator 1, local oscillator simultaneously
1 for a frequency be ωLOSignal；Low frequency wave is filtered by the frequency conversion and filter I of upconverter I, obtains a microwave letter
Number f [(ω+ωLO) t] export and give low-converter I；Low-converter I inputs local oscillator 2 simultaneously, and local oscillator 2 is that a frequency is (ωLO-
ω0) signal；Low frequency wave is filtered by the frequency conversion and filter II of low-converter I, obtains a microwave signal f [(ω+ω0)
T] it exports and gives power splitter II；Power splitter II is simultaneously by microwave signal f [(ω+ω0) t] export to low-converter III and down coversion
Device II；, by 2 input amplifier II of channel, down coversion will be inputted after amplification to the microwave signal f (ω t+ Δ φ) than phase
Device III；Low-converter III is to two paths of signals f (ω t+ Δ φ) and f [(ω+ω0) t] handled, obtain frequency variation signal f (ω0t-Δφ)；Low-converter II is to two paths of signals f (ω t) and f [(ω+ω0) t] handled, obtain frequency variation signal f (ω0t)；
Two-way frequency variation signal is inputted into phase comparator respectively, is obtained than phase result Δ φ.
The ωLOGreater than 1/2 to the microwave signal maximum bandwidth than phase.
The ω0Less than the instant bandwidth to the microwave signal than phase.
The beneficial technical effect of the present invention lies in:
(1) a kind of wide-band microwave signal based on signal autocorrelation provided by the invention eliminates tradition side than phase system
Instantaneous frequency measurement link in method, makes more uncorrelated to signal frequency than phase effect；(2) links such as frequency measurement, control are eliminated, it is increased
Device is analog device, and reaction speed is fast；(3) compression processing to wideband pulse signal is realized, intermediate frequency is substantially reduced
Signal bandwidth, it is easy to accomplish middle frequency ratio phase, can be realized wide frequency ranges, arbitrary signal form microwave signal than phase, reaction
Time is fast, realizes simple.
Detailed description of the invention
Fig. 1 is a kind of structural representation of the wide-band microwave signal based on signal autocorrelation provided by the present invention than phase system
Figure.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of wide-band microwave signal based on signal autocorrelation provided by the invention includes: to put than phase system
Big device I, amplifier II, power splitter I, power splitter II, upconverter I, low-converter I, low-converter II, low-converter III, filter
Wave device I, filter II, phase comparator.The input terminal of channel I connection amplifier I, the output end connection power splitter I's of amplifier I
Input terminal.The two-way output end of power splitter I is separately connected the first input of the first input end and low-converter II of upconverter I
End.The second input terminal of upconverter I connects local oscillator 1.The input terminal of the output end connection filter I of upconverter I.Filter
The first input end of the output end connection low-converter I of I.The second input terminal of low-converter I connects local oscillator 2.Low-converter I's
The input terminal of output end connection filter II.The input terminal of the output end connection power splitter II of filter II.The two of power splitter II
Road output end is separately connected the second input terminal of low-converter II and the second input terminal of low-converter III.Amplifier II's is defeated
Enter to hold interface channel 2.The first input end of the output end connection low-converter III of amplifier II.Low-converter II and down coversion
The output end of device III is separately connected the input terminal of phase comparator.
The course of work of the invention are as follows:
It will be divided equally after amplification in power splitter I to the microwave signal f (ω t) than phase by 1 input amplifier I of channel
For the identical signal of two-way, upconverter I is given all the way, gives low-converter II all the way.Upconverter I inputs local oscillator 1, local oscillator simultaneously
1 for a frequency be ωLOSignal.Low frequency wave is filtered by the frequency conversion and filter I of upconverter I, obtains a microwave letter
Number f [(ω+ωLO) t] export and give low-converter I.Low-converter I inputs local oscillator 2 simultaneously, and local oscillator 2 is that a frequency is (ωLO-
ω0) signal.Low frequency wave is filtered by the frequency conversion and filter II of low-converter I, obtains a microwave signal f [(ω+ω0)
T] it exports and gives power splitter II.Power splitter II is simultaneously by microwave signal f [(ω+ω0) t] export to low-converter III and down coversion
Device II.
Lower become, by 2 input amplifier II of channel, will be inputted after amplification to the microwave signal f (ω t+ Δ φ) than phase
Frequency device III.Low-converter III is to two paths of signals f (ω t+ Δ φ) and f [(ω+ω0) t] handled, obtain frequency variation signal f
(ω0t-Δφ).Low-converter II is to two paths of signals f (ω t) and f [(ω+ω0) t] handled, obtain frequency variation signal f (ω0t).Two-way frequency variation signal is inputted into phase comparator respectively, can be obtained than phase result Δ φ.
The ω that the present invention usesLOGreater than 1/2 to the microwave signal maximum bandwidth than phase.
The ω that the present invention uses0Less than the instant bandwidth to the microwave signal than phase.
Two-way receives signal and carries out down coversion respectively, realizes the effect of pulse compression, signal bandwidth is made almost to be reduced to 0, in
Frequency of heart becomes ω0。
It in the present embodiment, is 4GHz~6GHz, instant bandwidth 500MHz, signal to the microwave signal frequency range than phase
Form is linear frequency modulation.
Local oscillator 1 takes 9GHz, and after carrying out up-conversion with local oscillator 1, obtained signal frequency range is 13GHz~15GHz, instantaneously
Bandwidth 500MHz.
Local oscillator 2 takes 8.9GHz, and after carrying out down coversion with local oscillator 2, obtained signal frequency range is 4.1GHz~6.1GHz,
Instant bandwidth 500MHz.
After two-way reception signal carries out down coversion respectively, signal bandwidth is almost reduced to 0, and signal center frequency becomes
100MHz。
The present invention is explained in detail above in conjunction with drawings and examples, but the present invention is not limited to above-mentioned implementations
Example, within the knowledge of a person skilled in the art, can also make without departing from the purpose of the present invention
Various change out.The content being not described in detail in the present invention can use the prior art.
Claims (4)
1. a kind of wide-band microwave signal based on signal autocorrelation compares phase system, it is characterised in that: it includes: amplifier I, amplification
Device II, power splitter I, power splitter II, upconverter I, low-converter I, low-converter II, low-converter III, filter I, filtering
Device II, phase comparator；Channel 1 connects the input terminal of amplifier I, the input terminal of the output end connection power splitter I of amplifier I；Function point
The two-way output end of device I is separately connected the first input end of upconverter I and the first input end of low-converter II；Upconverter
The second input terminal of I connects local oscillator 1；The input terminal of the output end connection filter I of upconverter I；The output end of filter I connects
Connect the first input end of low-converter I；The second input terminal of low-converter I connects local oscillator 2；The output end of low-converter I connects
The input terminal of filter II；The input terminal of the output end connection power splitter II of filter II；The two-way output end of power splitter II point
It Lian Jie not the second input terminal of low-converter II and the second input terminal of low-converter III；The input terminal connection of amplifier II is logical
Road 2；The first input end of the output end connection low-converter III of amplifier II；The output of low-converter II and low-converter III
End is separately connected the input terminal of phase comparator.
2. a kind of wide-band microwave signal based on signal autocorrelation according to claim 1 compares phase system, it is characterised in that:
The course of work of the system are as follows:
Two will be divided into power splitter I after amplification by 1 input amplifier I of channel to the microwave signal f (ω t) than phase
The identical signal in road gives upconverter I all the way, gives low-converter II all the way；Upconverter I inputs local oscillator 1 simultaneously, and local oscillator 1 is
One frequency is ωLOSignal；Low frequency wave is filtered by the frequency conversion and filter I of upconverter I, obtains a microwave signal f
[(ω+ωLO) t] export and give low-converter I；Low-converter I inputs local oscillator 2 simultaneously, and local oscillator 2 is that a frequency is (ωLO-ω0)
Signal；Low frequency wave is filtered by the frequency conversion and filter II of low-converter I, obtains a microwave signal f [(ω+ω0)t]
It exports and gives power splitter II；Power splitter II is simultaneously by microwave signal f [(ω+ω0) t] export to low-converter III and low-converter
II；, by 2 input amplifier II of channel, low-converter will be inputted after amplification to the microwave signal f (ω t+ Δ φ) than phase
III；Low-converter III is to two paths of signals f (ω t+ Δ φ) and f [(ω+ω0) t] handled, obtain frequency variation signal f (ω0t-
Δφ)；Low-converter II is to two paths of signals f (ω t) and f [(ω+ω0) t] handled, obtain frequency variation signal f (ω0t)；It will
Two-way frequency variation signal inputs phase comparator respectively, obtains than phase result Δ φ.
3. a kind of wide-band microwave signal based on signal autocorrelation according to claim 2 compares phase system, it is characterised in that:
The ωLOGreater than 1/2 to the microwave signal maximum bandwidth than phase.
4. a kind of wide-band microwave signal based on signal autocorrelation according to claim 3 compares phase system, it is characterised in that:
The ω0Less than the instant bandwidth to the microwave signal than phase.
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| CN107621571A (en) * | 2016-07-15 | 2018-01-23 | 北京航天长征飞行器研究所 | A kind of wide-band microwave signal based on signal autocorrelation is than phase method and system |
| CN111427039B (en) * | 2020-04-21 | 2021-02-12 | 北京航天长征飞行器研究所 | ISAR imaging deception jamming method and device based on micro-motion characteristic modulation |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768302A (en) * | 2012-07-18 | 2012-11-07 | 北京无线电计量测试研究所 | Double-channel digital phase noise detection device and phase noise detection method |
| CN204177866U (en) * | 2014-11-13 | 2015-02-25 | 北京经纬恒润科技有限公司 | A kind of broadband frequency measurement circuit |
| CN204595094U (en) * | 2015-05-26 | 2015-08-26 | 中国电子科技集团公司第十四研究所 | Binary channels phase Difference Measuring System |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5573628B2 (en) * | 2010-11-22 | 2014-08-20 | 富士通株式会社 | Phase difference detection method, phase control method, phase difference detection circuit, phase control circuit, and wireless power transmission device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768302A (en) * | 2012-07-18 | 2012-11-07 | 北京无线电计量测试研究所 | Double-channel digital phase noise detection device and phase noise detection method |
| CN204177866U (en) * | 2014-11-13 | 2015-02-25 | 北京经纬恒润科技有限公司 | A kind of broadband frequency measurement circuit |
| CN204595094U (en) * | 2015-05-26 | 2015-08-26 | 中国电子科技集团公司第十四研究所 | Binary channels phase Difference Measuring System |
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