CN108983157A - Generate the system and method for wideband correlation - Google Patents
Generate the system and method for wideband correlation Download PDFInfo
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- CN108983157A CN108983157A CN201811072284.XA CN201811072284A CN108983157A CN 108983157 A CN108983157 A CN 108983157A CN 201811072284 A CN201811072284 A CN 201811072284A CN 108983157 A CN108983157 A CN 108983157A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/282—Transmitters
Abstract
The present invention provides a kind of system for generating wideband correlation, which includes: the initial module for generating the first FM signal；With the phase-locked loop module of initial module communication connection, phase-locked loop module is used to the first FM signal being converted into the second FM signal；And the modulation module with phase-locked loop module communication connection, modulated signal are used to the second FM signal being converted into third FM signal.The present invention also provides the methods for generating wideband correlation.
Description
Technical field
The present invention relates to electronic radar field more particularly to a kind of system and methods for generating wideband correlation.
Background technique
High-resolution radar has preferable Target detection and identification ability, in radar imagery, target acquisition, target identification
Etc. military domains achieved and be widely applied, high-resolution radar is the important directions of the following radar system development.Broadband line
Key technology of the property FM signal production method as high-resolution radar, it has also become research hotspot.However, current electronic device
The factors such as horizontal and design method cause influence to the generation of broadband signal, and signal bandwidth, frequency linearity etc. are still
The generation of Shortcomings, wideband correlation has gradually shown the restriction of high-resolution radar.
The method for generating wideband correlation at present has some defects, for example, can be produced using voltage controlled oscillator
The wider linear FM signal of green tape width, but because analog control voltage precision is limited, the frequency of generated linear FM signal
The linearity is poor；In addition, can produce the higher linear tune of frequency linearity using digital analog converter and frequency mixer (or frequency multiplier)
Frequency signal, but consider the generation of clutter interference and new modulated signal, its frequency of linear FM signal caused by this method
Rate bandwidth is limited.
Summary of the invention
In order to overcome at least one aspect of the above problem, it is wide that the embodiment of the present invention provides a kind of generation based on phaselocked loop
System and method with linear FM signal, the system have the characteristics that circuit it is small in size, it is low in energy consumption, integrated suitable on piece；
This method realizes broadband, high linearity, low miscellaneous using the broadband character of voltage controlled oscillator and the accurate feedback characteristics of phaselocked loop
Scattered linear FM signal generates.
According to an aspect of the present invention, a kind of system for generating wideband correlation is provided, which includes: use
In the initial module for generating the first FM signal；With the phase-locked loop module of initial module communication connection, phase-locked loop module is used for will
First FM signal is converted into the second FM signal；And the modulation module with phase-locked loop module communication connection, modulated signal are used
In the second FM signal is converted into third FM signal.
It is according to the present invention generate wideband correlation system some embodiments, the system further include with initially
The control module that module, phase-locked loop module and modulation module communicate to connect, control module are instructed for generating state modulator, and
State modulator instruction is transmitted to initial module, phase-locked loop module and modulation module respectively.
It is according to the present invention generate wideband correlation system some embodiments, the system further include with initially
The clock module that module and control module communicate to connect, clock module for time parameter is transmitted to respectively control module and
Initial module.
Some embodiments of the system according to the present invention for generating wideband correlation, phase-locked loop module includes locking phase
Ring, phaselocked loop can realize tracking of second FM signal to the first FM signal by feedback control.
Some embodiments of the system according to the present invention for generating wideband correlation, phaselocked loop includes: frequency divider；
Phase frequency detector comprising first input end and the second input terminal, first input end and initial module communicate to connect, for receiving
First FM signal, the second input terminal and the frequency divider communicate to connect, for receiving feedback signal；It is communicated with phase frequency detector
The loop filter of connection；And voltage controlled oscillator, the input terminal of voltage controlled oscillator and the output end of loop filter connect, pressure
The first output end for controlling oscillator connects frequency divider, for generating feedback signal, the second output terminal and modulation of voltage controlled oscillator
Module communication connection.
According to another aspect of the present invention, a kind of method for generating wideband correlation is provided, this method includes
Following steps: S1, the first FM signal is generated；S2, the first FM signal is converted into the second FM signal；And S3, by
Two FM signals are modulated into third FM signal, wherein the second FM signal can track the first FM signal.
Some embodiments of the method according to the present invention that FM signal is generated using above system, this method is in step S1
Before further include: S0, setting system parameter, and according to system parameter generate the first FM signal, conversion the first FM signal with
And the second FM signal of modulation.
Some embodiments of the method according to the present invention that FM signal is generated using above system, step S0 include:
S0.1, setting time parameter, and system parameter is arranged according to time parameter and generates the first FM signal；And S0.2, production
Raw state modulator instruction, and instructed according to state modulator and to generate the first FM signal, the first FM signal of conversion and modulation the
Two FM signals.
Some embodiments of the method according to the present invention that FM signal is generated using above system, step S1 include:
S1.1, state modulator instruction is received；And S1.2, according to state modulator instruct generate the first FM signal.
Some embodiments of the method according to the present invention that FM signal is generated using above system, step S2 include:
S2.1, frequency and phase discrimination processing is carried out to received first FM signal of institute and feedback signal；S2.2, it handles by frequency and phase discrimination
Signal afterwards carries out loop filtering processing；S2.3, using voltage controlled oscillator to by loop filtering, treated that signal is adjusted
Frequency is handled, to obtain the second FM signal；And S2.4, feedback pass through the second FM signal of scaling down processing according to feedback
The first FM signal of signal trace.
Compared with prior art, the present invention one of at least has the following advantages that:
(1) FM signal generated has superior broadband performance and good frequency linearity index simultaneously, solves
The limited technical bottleneck with linearity index error of existing linear FM signal production method bandwidth；
(2) system bulk is small, low in energy consumption, can integrate in one single chip.
Detailed description of the invention
By the description made for the present invention of below with reference to attached drawing, other objects and advantages of the present invention will be aobvious and easy
See, and can help that complete understanding of the invention will be obtained.
Fig. 1 is the schematic diagram of the system according to an embodiment of the present invention for generating wideband correlation；
Fig. 2 is the flow chart of the method according to an embodiment of the present invention for generating wideband correlation.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.Unless otherwise defined, the technical term or scientific term that the present invention uses should be tool in fields of the present invention
The ordinary meaning for thering is the personage of general technical ability to be understood.
The present invention provides a kind of system and method for generation wideband correlation based on phaselocked loop, which has
Circuit is small in size, low in energy consumption, the features such as integrating suitable on piece；This method utilizes the broadband character and phaselocked loop of voltage controlled oscillator
Accurate feedback characteristics, realize broadband, high linearity, low spurious linear FM signal generate.
The embodiment of the present invention is further described with reference to the accompanying drawing.
Fig. 1 is the schematic diagram of the system according to an embodiment of the present invention for generating wideband correlation.As shown in Figure 1,
The system for generating FM signal includes: the initial module 1 for generating the first FM signal；It is communicated to connect with initial module 1
Phase-locked loop module 2, phase-locked loop module 2 are used to the first FM signal being converted into the second FM signal, and phase-locked loop module 2 can lead to
It crosses feedback control and realizes tracking of second FM signal to the first FM signal；And the tune communicated to connect with phase-locked loop module 2
Molding block 3, modulation module 3 are used to the second FM signal being converted into third FM signal.First FM signal is initial frequency modulation
Signal, third FM signal are the final FM signal with superior broadband performance and good frequency linearity, and second adjusts
Frequency signal is transition FM signal, and the second FM signal can carry out tracking lock to the first FM signal.
According to preferred embodiment, the system according to the present invention for generating wideband correlation further includes control module
4.Control module 4 is communicated to connect with initial module 1, phase-locked loop module 2 and modulation module 3, and control module 4 is for generating parameter
Control instruction, and the instruction of corresponding state modulator is transmitted to initial module 1, phase-locked loop module 2 and modulation module 3 respectively.Control
Molding block 4 can receive the control instruction from host computer and generate state modulator instruction.Control module 4 has three tunnels control letter
Number output, three tunnels control signal are respectively provided with different state modulator instructions.First via control signal can be exported to introductory die
The first input end of block 1, the second tunnel control signal can be exported to the first input end of phase-locked loop module 2, third road control letter
It number can export to the first input end of modulation module 3.
According to preferred embodiment, the system according to the present invention for generating wideband correlation further includes clock module
5.Clock module 5 is communicated to connect with initial module 1 and control module 4, and clock module 5 is for time parameter to be transmitted to respectively
Control module 4 and initial module 1.Clock module 5 is exported with two-way clock signal, and first via clock signal can be exported to control
The reference clock input terminal of molding block 4, the second tunnel clock signal can be exported to the second input terminal of initial module 1.
Phase-locked loop module 2 includes phase frequency detector 21, loop filter 22, voltage controlled oscillator 23 and frequency divider 24.Frequency discrimination
Phase discriminator 21 includes first input end and the second input terminal, and first input end and initial module 1 communicate to connect, for receiving first
FM signal, the second input terminal and frequency divider 24 communicate to connect, for receiving feedback signal；The input terminal of loop filter 22 connects
Connect the output end of phase frequency detector 21, the input terminal of the output end connection voltage controlled oscillator 23 of loop filter 22；Voltage controlled oscillation
First output end of device 23 connects frequency divider 24, for generating feedback signal, the second output terminal and modulation of voltage controlled oscillator 23
Module 3 communicates to connect.The first input end and control module 4 of frequency divider 24 communicate to connect, the second input terminal and voltage controlled oscillation
First output end of device 23 communicates to connect.Control module 4 controls the frequency dividing ratio of frequency divider 24 by control signal.
The first input end of phase frequency detector 21 receives the first FM signal, i.e. reference signal, and the second input terminal receives warp
Cross frequency dividing treated the second FM signal, i.e. feedback signal.Phase frequency detector 21 compares reference signal and feedback signal
It is right, the difference on the frequency and phase difference of two paths of signals are obtained, and difference on the frequency and phase difference are converted to voltage difference, which is led to
After crossing the filtering of loop filter 22, the control voltage as voltage controlled oscillator 23.The second frequency modulation letter that voltage controlled oscillator 23 generates
Number it is divided into two-way output signal, first via output signal is transmitted in frequency divider 24 as feedback signal, the second tunnel output letter
It number is transmitted to modulation module 3, modulation module 3 generates third FM signal after being modulated to the second tunnel output signal.
The embodiment of the present invention also provides a kind of method for generating wideband correlation, and Fig. 2 is implemented according to this implementation
The flow chart of the method for the generation FM signal of example.As shown in Fig. 2, using above system generate FM signal method include with
Lower step:
S0, setting system parameter, and the first FM signal, the first FM signal of conversion and tune are generated according to system parameter
Make the second FM signal.Here, system parameter can be transmitted to the corresponding module of system.
System parameter is transmitted to corresponding module by control module 4 respectively.
According to preferred embodiment, step S0 be may comprise steps of: S0.1, setting time parameter, and according to the time
The first FM signal of parameter setting system parameter and generation, that is, time parameter is transmitted to control module by clock module 5 respectively
4 and initial module 1, it can be that control module 4 and initial module 1 provide work clock by clock module 5, clock module 5 has
There is the output of two-way clock signal, first via clock signal can be exported to control module 4, the second tunnel clock signal is exported to first
Beginning module 1；And S0.2, generation state modulator instruction, and instructed according to state modulator and generate the first FM signal, conversion first
The second FM signal of FM signal and modulation, that is, control module 4 generates state modulator instruction, and respectively refers to state modulator
Order is divided into three road signals and is transmitted to initial module 1, phase-locked loop module 2 and modulation module 3 respectively, that is to say control module 4 to first
Beginning module 1, phase-locked loop module 2 and modulation module 3 are configured.
S1, the first FM signal is generated.
Initial module 1 can generate the first FM signal by phase measurements and look-up table.
According to preferred embodiment, step S1 be may comprise steps of: S1.1, receive state modulator instruction, that is, initial
Module 1 receives the state modulator instruction that control module 4 issues；And S1.2, according to state modulator instruct generate the first frequency modulation letter
Number, that is, initial module 1 instructs according to state modulator and generates the first FM signal.Initial module 1 can have a signal output
End after initial module 1 receives the waveform parameter configuration-direct from control module 4, carries out FM signal using look-up table
It generates and exports.In the present embodiment, initial module 1 can use digital analog converter, generate first by digital-to-analogue conversion technology and adjust
Frequency signal, the first FM signal are the linear FM signal that bandwidth is 100MHz, and frequency linearity is better than 10-6, this is this implementation
The final generation broadband of example, high linearity linear FM signal provide guarantee.
S2, the first FM signal is converted into the second FM signal.
According to preferred embodiment, step S2 be may comprise steps of:
S2.1, frequency and phase discrimination processing is carried out to received first FM signal of institute and feedback signal, in implementation of the invention
In example, the first input end of phase frequency detector 21 receives the first FM signal, and the second input terminal is received from the anti-of frequency divider 24
Feedback signal, and frequency and phase discrimination processing is carried out to the first FM signal and feedback signal.
S2.2, loop filtering processing is carried out to by frequency and phase discrimination treated the first FM signal, utilizes loop herein
Filter 22 handles signal, then passes the signal along to voltage controlled oscillator 23.
S2.3, frequency modulation processing is carried out by loop filterings treated signal using 23 pairs of voltage controlled oscillator, to obtain the
Two FM signals.
S2.4, feedback by the second FM signal of scaling down processing with according to the first FM signal of signal trace of feedback,
Second FM signal is transmitted to frequency divider 24, the second input terminal of phase frequency detector 21 by the first output end of voltage controlled oscillator 23
Divided device 24 is received treated the second FM signal, control module 4 inputs frequency dividing ratio control instruction in frequency divider 24, right
The frequency dividing ratio of phaselocked loop is controlled, and carries out source to the second FM signal that voltage controlled oscillator 23 exports according to above-mentioned frequency dividing ratio
Reason.
The first input end of phase frequency detector 21 and the second input terminal receive reference signal and feedback signal, frequency discrimination mirror respectively
Reference signal and feedback signal are compared phase device 21, obtain the difference on the frequency and phase difference of two paths of signals, and by difference on the frequency and
Phase difference is converted to voltage difference, the control electricity after which is filtered by loop filter 22, as voltage controlled oscillator 23
Pressure.Two-way output signal is divided by the second FM signal that voltage controlled oscillator 23 generates, first via output signal is as locking phase
The output signal of ring moulds block 2 is transmitted to modulation module 3, and the second tunnel output signal is transmitted in frequency divider 24 as feedback signal.
S3, the second FM signal is modulated into third FM signal.Modulation module uses switch modulation in the present embodiment,
It can also be using other modulator approaches in other embodiments.The second FM signal is modulated into third tune by switch modulation
Frequency signal.
In the present embodiment, the first FM signal is obtained by digital-to-analogue conversion technology, it in other examples, can also be with
Directly obtained by Digital Frequency Synthesize (DDS).In the present embodiment, control module 4 uses field programmable gate array
(FPGA), single-chip microcontroller or Digital Signal Processing (DSP) circuit can also in other examples, be used.
The centre frequency of the third FM signal generated in the present embodiment is 5.4GHz, bandwidth 2.5GHz, frequency linearity
Degree is better than 8.8 × 10-4.System provided in this embodiment has the characteristics that small in size, low in energy consumption, is conducive to collect in one single chip
At.The method provided in this embodiment for generating wideband correlation can make final FM signal have superior width
Band performance and good frequency linearity, solve that existing linear FM signal production method bandwidth is limited and linearity index error
Technical bottleneck, meet demand of the high-resolution radar system to high performance wideband linear FM signal.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of system for generating wideband correlation, which is characterized in that the system comprises:
Initial module, for generating the first FM signal；
Phase-locked loop module is communicated to connect with the initial module, for first FM signal to be converted into the second frequency modulation letter
Number；And
Modulation module is communicated to connect with the phase-locked loop module, for second FM signal to be converted into third frequency modulation letter
Number.
2. the system according to claim 1 for generating wideband correlation, which is characterized in that the system is also wrapped
It includes:
Control module is communicated to connect with the initial module, phase-locked loop module and modulation module, is referred to for generating state modulator
It enables, and state modulator instruction is transmitted to the initial module, the phase-locked loop module and the modulation module respectively.
3. the system according to claim 2 for generating wideband correlation, which is characterized in that the system is also wrapped
It includes:
Clock module is communicated to connect with the initial module and control module, described for time parameter to be transmitted to respectively
Control module and the initial module.
4. the system according to claim 3 for generating wideband correlation, which is characterized in that the phase-locked loop module
Including phaselocked loop, the phaselocked loop can realize second FM signal to first FM signal by feedback control
Tracking.
5. the system according to claim 4 for generating wideband correlation, which is characterized in that the phase-locked loop module
Include:
Frequency divider；
Phase frequency detector, including first input end and the second input terminal, the first input end and initial module communicate to connect, and use
In receiving first FM signal, second input terminal and the frequency divider are communicated to connect, for receiving feedback signal；
Loop filter, the loop filter and the phase frequency detector communicate to connect；And
Voltage controlled oscillator, the input terminal of the voltage controlled oscillator are connect with the output end of the loop filter, the voltage-controlled vibration
The first output end for swinging device connects the frequency divider, for generating feedback signal, the second output terminal of the voltage controlled oscillator with
The modulation module communication connection.
6. a kind of method for generating wideband correlation, which comprises the following steps:
S1, the first FM signal is generated；
S2, first FM signal is converted into the second FM signal；And
S3, second FM signal is modulated into third FM signal,
Wherein, second FM signal can track first FM signal.
7. generating the method for wideband correlation according to claim 6, which is characterized in that the method is in step S1
Before further include:
S0, setting system parameter, and first FM signal, conversion the first frequency modulation letter are generated according to the system parameter
Number and modulation second FM signal.
8. generating the method for wideband correlation according to claim 7, which is characterized in that the step S0 includes:
S0.1, setting time parameter, and the system parameter is arranged according to the time parameter and generates first frequency modulation
Signal；And
S0.2, state modulator instruction is generated, and according to state modulator instruction generation first FM signal, conversion
First FM signal and modulation second FM signal.
9. generating the method for wideband correlation according to claim 8, which is characterized in that the step S1 includes:
S1.1, state modulator instruction is received；And
S1.2, first FM signal is generated according to state modulator instruction.
10. generating the method for wideband correlation according to claim 9, which is characterized in that the step S2 includes:
S2.1, frequency and phase discrimination processing is carried out to received first FM signal of institute and feedback signal；
S2.2, loop filtering processing is carried out to by frequency and phase discrimination treated signal；
S2.3, frequency modulation processing is carried out to by loop filtering treated signal using voltage controlled oscillator, to obtain the second frequency modulation
Signal；And
S2.4, feedback are by the second FM signal of scaling down processing with the first FM signal described in the signal trace according to feedback.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690641A (en) * | 2019-10-11 | 2020-01-14 | 中国船舶重工集团公司第七0七研究所 | Reference frequency source device and method for cold atom interferometer laser output control |
| CN112087230A (en) * | 2020-09-17 | 2020-12-15 | 中国科学院空天信息创新研究院 | Broadband linear frequency modulation signal generating device and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090309785A1 (en) * | 2006-07-13 | 2009-12-17 | Siemens Aktiengesellschaft | Radar arrangement |
| CN202182940U (en) * | 2011-08-05 | 2012-04-04 | 中国电子科技集团公司第三十八研究所 | Generation system of large-bandwidth linear frequency modulation signal |
| CN206479633U (en) * | 2017-01-18 | 2017-09-08 | 成都拓来微波技术有限公司 | One kind miniaturization hanging Radio Beacon |
-
2018
- 2018-09-14 CN CN201811072284.XA patent/CN108983157A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090309785A1 (en) * | 2006-07-13 | 2009-12-17 | Siemens Aktiengesellschaft | Radar arrangement |
| CN202182940U (en) * | 2011-08-05 | 2012-04-04 | 中国电子科技集团公司第三十八研究所 | Generation system of large-bandwidth linear frequency modulation signal |
| CN206479633U (en) * | 2017-01-18 | 2017-09-08 | 成都拓来微波技术有限公司 | One kind miniaturization hanging Radio Beacon |
Non-Patent Citations (2)
| Title |
|---|
| 丁满来 等: "基于锁相跟踪技术的宽带线性调频产生方法研究", 《微波学报》 * |
| 何小艇: "《电子系统设计 第3版》", 31 August 2004, 浙江大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110690641A (en) * | 2019-10-11 | 2020-01-14 | 中国船舶重工集团公司第七0七研究所 | Reference frequency source device and method for cold atom interferometer laser output control |
| CN112087230A (en) * | 2020-09-17 | 2020-12-15 | 中国科学院空天信息创新研究院 | Broadband linear frequency modulation signal generating device and method |
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