CN105610464A - Method and system for two-point injection type modulation of transmitter in data set - Google Patents
Method and system for two-point injection type modulation of transmitter in data set Download PDFInfo
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- CN105610464A CN105610464A CN201510969446.XA CN201510969446A CN105610464A CN 105610464 A CN105610464 A CN 105610464A CN 201510969446 A CN201510969446 A CN 201510969446A CN 105610464 A CN105610464 A CN 105610464A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/106—M-ary FSK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/12—Modulator circuits; Transmitter circuits
- H04L27/127—Modulator circuits; Transmitter circuits using a controlled oscillator in a feedback loop
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
The invention provides a method and a system for two-point injection type modulation of a transmitter in a data set, wherein the method comprises the following steps of: generating a phase signal through a digital signal with the need of modulation; generating a varying frequency signal by the phase signal; generating a fixed frequency signal through a control signal; and performing amplitude decreasing for the varying frequency signal and performing carrier-frequency output for the fixed frequency signal. According to the method and the system, frequency can be changed just by changing a reference voltage, consequently, a range of settable frequency is large, and a range of application is wide; and by means of generating the varying frequency signal through a voltage-controlled module, difficulty in debugging is low, implementation is easy, influence of a high-frequency Q value is low, and product consistency is high.
Description
Technical field
The modulation technique field that the present invention relates to emitter in data set, relates in particular to emitter in data set2 pouring-in modulator approaches and system.
Background technology
Conventional directly modulation technique is to make it by modulation letter by the frequency that modulation signal is directly controlled oscillatorNumber rule linear change. This modulation technique need to be passed through frequency multiplication, filtering, and the links such as amplification reach order, thereby making circuit complexity, debugging difficulty is large, and modulation signal high-frequency effects are poor, and performance is referred toMark can not reach the guarantee of arriving very much; And making product in process of production, input human cost is high, productThe problems such as fraction defective is large.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, 2 pouring-in tune of emitter in a kind of data set are providedMethod and system processed, adopt 2 pouring-in peculiar modulation techniques, make circuit reduction, and product are consistentProperty high, reduce human cost.
Technical scheme of the present invention is, two of emitter pouring-in modulator approaches in data set, comprise asLower step:
The data signal of modulating by needs produces phase signal;
The frequency signal being changed by above-mentioned phase signal;
Produce fixing frequency signal by control signal;
The frequency signal of above-mentioned variation is carried out to amplitude decline and fixing frequency signal is carried out to carrier frequency defeatedGo out.
Above-mentioned method, wherein, described data signal of modulating by needs produces the step of phase signalComprise: the data signal of needs modulation, by GMSK module, is produced to GMSK phase signal.
Above-mentioned method, wherein, the step of the described frequency signal being changed by above-mentioned phase signalComprise:
By voltage-controlled module, the frequency signal that phase signal is changed.
Above-mentioned method, wherein, the described step that produces fixing frequency signal by control signal comprises:
By control signal by PD module produce different reference voltage signals and corresponding setpoint frequency andDetect the modulation signal of carrier frequency module feedback:
By voltage-controlled module, reference voltage signal is produced to fixing frequency signal.
Above-mentioned method, wherein, describedly carries out the frequency signal of above-mentioned variation amplitude decline and will fixThe frequency signal step of carrying out carrier frequency output comprise:
Receive fixing frequency signal and the frequency signal of variation by carrier frequency module;
The frequency signal of variation is carried out amplitude decline by carrier frequency module, and fixing frequency signal is carried outCarrier frequency output.
Above-mentioned method, wherein, the frequency signal of variation is carried out amplitude decline by described carrier frequency module, andAnd fixing frequency signal is carried out in the step of carrier frequency output: described carrier frequency module is by the frequency letter changingNumber amplitude drop to 1/5th of original signal.
Another side of the present invention, in data set, two of emitter pouring-in modulating systems, comprise GMSK mouldPiece, voltage-controlled module, PD module and carrier frequency module, between described carrier frequency module and GMSK module, PD moduleBe equipped with a voltage-controlled module;
Described GMSK module is for producing GMSK phase signal by the data signal of needs modulation;
The voltage-controlled module being provided with between described carrier frequency module and GMSK module for by GMSK module produceThe frequency signal that GMSK phase signal changes.
Above-mentioned modulating system, wherein, described PD module is for producing different benchmark electricity by control signalPress signal and corresponding setpoint frequency, and detect the modulation signal of described carrier frequency module feedback.
Above-mentioned modulating system, wherein, the voltage-controlled module being provided with between described carrier frequency module and PD module is usedProduce fixing frequency signal in the reference voltage signal that PD module is produced.
Above-mentioned modulating system, wherein, described carrier frequency module is produced GMSK phase signal by voltage-controlled moduleThe frequency signal of changing carries out amplitude decline, and PD module is produced to fixing frequency by voltage-controlled moduleRate signal carries out carrier frequency output.
The invention provides 2 pouring-in modulator approaches and the system of emitter in data set, wherein saidMethod, comprise the steps: that the data signal of modulating by needs produces phase signal; By above-mentionedThe frequency signal that phase signal changes; Produce fixing frequency signal by control signal; By above-mentionedThe frequency signal changing carries out amplitude decline and fixing frequency signal is carried out to carrier frequency output. Be specially,The reference voltage signal that PD module produces, by voltage-controlled module, produces fixing frequency signal, therefore only need moreChange reference voltage and just can change frequency, therefore it is large to establish frequency range, applied range; GMSK module producesThe frequency signal that changes by voltage-controlled module of GMSK phase signal, debugging difficulty is low, easily realize,And be subject to high frequency Q value to affect little; Carrier frequency module changes GMSK phase signal by voltage-controlled moduleFrequency signal carries out amplitude decline, the frequency signal that GMSK phase signal is changed by voltage-controlled moduleFor 1/5th of original signal, and this signal and PD module are produced to fixing frequency by voltage-controlled moduleRate signal carries out carrier frequency output, easily realize, and and affected by high frequency Q value little, homogeneity of productHigh.
Brief description of the drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, the present invention and spy thereofLevy, profile and advantage will become more obvious. In whole accompanying drawings, identical mark is indicated identical part.Deliberately proportionally do not draw accompanying drawing, focus on illustrating purport of the present invention.
Fig. 1 is the schematic diagram of 2 pouring-in modulator approaches of emitter in data set provided by the invention;
Fig. 2 is the structured flowchart of 2 pouring-in modulating systems of emitter in data set provided by the invention.
Detailed description of the invention
In the following description, having provided a large amount of concrete details manages the present invention more thoroughly to provideSeparate. But, it is obvious to the skilled person that the present invention can be without one orMultiple these details and being implemented. In other example, for fear of obscuring with the present invention,Be not described for technical characterictics more well known in the art.
In order thoroughly to understand the present invention, will detailed step and detailed knot be proposed in following descriptionStructure, to explain technical scheme of the present invention. Preferred embodiment of the present invention is described in detail as follows, butExcept these are described in detail, the present invention can also have other embodiments.
Shown in Fig. 1-Fig. 2, the invention provides 2 pouring-in modulation methods of emitter in data setMethod and system, wherein modulator approach, mainly comprises the steps:
Step S1: the data signal of modulating by needs produces phase signal, specifically comprises, will need to adjustThe data signal of system, by GMSK module 1, produces GMSK phase signal.
Step S2: the frequency signal being changed by above-mentioned phase signal, specifically comprises, by voltage-controlledModule 2, the frequency signal that phase signal is changed, is more specifically to need the data signal of modulation logicalCross GMSK module 1, produce GMSK phase signal, because the voltage of each period of GMSK phase signal isChange according to data are fixing, then by voltage-controlled module 2, the frequency signal changing.
Step S3: produce fixing frequency signal by control signal, specifically comprise, step S3a: willControl signal produces different reference voltage signals and corresponding setpoint frequency and detection by PD module 3The modulation signal that carrier frequency module 4 is fed back, whether detection Frequency and Amplitude meets the requirement of setpoint frequency, ifUndesirable, can automatically control fundamental voltage, to reach requirement; Step S3b: by voltage-controlled module 2Reference voltage signal is produced to fixing frequency signal.
Step S4: the frequency signal of above-mentioned variation is carried out to amplitude decline and fixing frequency signal is carried outCarrier frequency output, specifically comprises step S4a: receive fixing frequency signal and variation by carrier frequency module 4Frequency signal, be specially PD module 3 and produce fixing frequency signal and GMSK by voltage-controlled module 2The frequency signal that the GMSK phase signal that module 1 produces changes by voltage-controlled module 2 can enter simultaneouslyIn carrier frequency module 4; Step S4b: the frequency signal of variation is carried out amplitude decline by carrier frequency module 4, andFixing frequency signal is carried out to carrier frequency output, be specially, carrier frequency module 4 can be logical by GMSK phase signalCross the frequency signal that voltage-controlled module 2 changes and carry out amplitude decline, make GMSK phase signal by voltage-controlledThe frequency signal that module 2 changes is 1/5th of original signal, and by this signal and PD module3 produce fixing frequency signal by voltage-controlled module 2 carries out carrier frequency output.
In the present invention, the reference voltage signal that PD module 3 produces, by voltage-controlled module 2, produces fixingFrequency signal, just can change frequency therefore only need change reference voltage, therefore it is large to establish frequency range, applicationScope is wide; The frequency letter that the GMSK phase signal that GMSK module 1 produces changes by voltage-controlled module 2Number, debugging difficulty is low, easily realizes, and is subject to high frequency Q value to affect little; Carrier frequency module 4 is by GMSK phaseThe frequency signal that position signal changes by voltage-controlled module 2 carries out amplitude decline, makes GMSK phase signalThe frequency signal changing by voltage-controlled module 2 is original signal 1/5th, and by this signalProduce fixing frequency signal with PD module 3 by voltage-controlled module 2 and carry out carrier frequency output, easily realize,And and it is little affected by high frequency Q value, homogeneity of product is high.
Another side of the present invention, as shown in Figure 2, two of emitter notes in data set provided by the inventionEnter formula modulating system, comprise GMSK module 1, voltage-controlled module 2, PD module 3 and carrier frequency module 4, carrier frequencyBetween module 4 and GMSK module 1, PD module 3, be equipped with a voltage-controlled module 2; GMSK module 1 forThe data signal of needs modulation is produced to GMSK phase signal; Between carrier frequency module 4 and GMSK module 1The frequency that the voltage-controlled module 2 being provided with changes for the GMSK phase signal that GMSK module 1 is producedSignal.
In the present invention, PD module 3 is for producing control signal different reference voltage signal and correspondingSetpoint frequency, and detect the modulation signal that described carrier frequency module 4 is fed back, whether detect Frequency and AmplitudeMeet the requirement of setpoint frequency, if undesirable, can automatically control fundamental voltage, to reach requirement,Carrier frequency module 4 changes GMSK phase signal frequency signal by voltage-controlled module 2 carries out under amplitudeFall, and PD module 3 is produced to fixing frequency signal by voltage-controlled module 2 carry out carrier frequency output.
Because the present invention has adopted as above technical scheme, tool has the following advantages:
(1), the reference voltage signal that produces of PD module can be by voltage-controlled module, produce fixing frequency and believeNumber, just can change frequency therefore only need change reference voltage, therefore it is large to establish frequency range, applied range.
(2), the frequency signal that changes by voltage-controlled module of GMSK phase signal that produces of GMSK module,Debugging difficulty is low, easily realizes, and is subject to high frequency Q value to affect little.
(3) frequency signal that, carrier frequency module can change GMSK phase signal by voltage-controlled module entersRow amplitude declines, and making the frequency signal that GMSK phase signal changes by voltage-controlled module is original signal1/5th, and this signal and PD module produced to fixing frequency signal by voltage-controlled module carry outCarrier frequency output. Easily realize, and and affected by high frequency Q value little, and homogeneity of product is high.
Above preferred embodiment of the present invention is described. It will be appreciated that, the present invention is office notBe limited to above-mentioned specific implementations, the equipment of wherein not describing in detail to the greatest extent and structure are construed as uses abilityCommon mode in territory is implemented; Any those of ordinary skill in the art, are not departing from skill of the present inventionIn art scheme scope situation, all can utilize the method for above-mentioned announcement and technology contents to technical solution of the present inventionMake many possible variations and modification, or be revised as the equivalent embodiment of equivalent variations, this does not affectFlesh and blood of the present invention. Therefore, every content that does not depart from technical solution of the present invention, according to the present inventionTechnical spirit to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belong toIn the scope of technical solution of the present invention protection.
Claims (10)
1. two of emitter pouring-in modulator approaches in data set, is characterized in that, comprise the steps:
The data signal of modulating by needs produces phase signal;
The frequency signal being changed by above-mentioned phase signal;
Produce fixing frequency signal by control signal;
The frequency signal of above-mentioned variation is carried out to amplitude decline and fixing frequency signal is carried out to carrier frequency output.
2. the method for claim 1, is characterized in that, the described numeral letter of modulating by needsNumber producing the step of phase signal comprises:
The data signal of needs modulation, by GMSK module, is produced to GMSK phase signal.
3. the method for claim 1, is characterized in that, is describedly produced by above-mentioned phase signalThe step of the frequency signal changing comprises:
By voltage-controlled module, the frequency signal that phase signal is changed.
4. the method as described in as arbitrary in claim 1-3, is characterized in that, describedly produces by control signalThe step of raw fixing frequency signal comprises:
By control signal by PD module produce different reference voltage signals and corresponding setpoint frequency andDetect the modulation signal of carrier frequency module feedback:
By voltage-controlled module, reference voltage signal is produced to fixing frequency signal.
5. method as claimed in claim 4, is characterized in that, described by the frequency signal of above-mentioned variationCarry out amplitude decline and the step that fixing frequency signal carries out carrier frequency output comprised:
Receive fixing frequency signal and the frequency signal of variation by carrier frequency module;
The frequency signal of variation is carried out amplitude decline by carrier frequency module, and fixing frequency signal is carriedFrequently output.
6. method as claimed in claim 5, is characterized in that, described carrier frequency module is by the frequency changingSignal carries out amplitude decline, and fixing frequency signal is carried out in the step of carrier frequency output: described yearThe amplitude of the frequency signal of variation is dropped to 1/5th of original signal by frequency module.
7. two of emitter pouring-in modulating systems in data set, is characterized in that, comprise GMSK mouldPiece, voltage-controlled module, PD module and carrier frequency module, between described carrier frequency module and GMSK module, PD moduleBe equipped with a voltage-controlled module;
Described GMSK module is for producing GMSK phase signal by the data signal of needs modulation;
The voltage-controlled module being provided with between described carrier frequency module and GMSK module for by GMSK module produceThe frequency signal that GMSK phase signal changes.
8. modulating system as claimed in claim 7, is characterized in that, described PD module will be for controllingSignal processed produces different reference voltage signals and corresponding setpoint frequency, and detects described carrier frequency moduleThe modulation signal of feedback.
9. modulating system as claimed in claim 8, is characterized in that, described carrier frequency module and PD mouldThe voltage-controlled module being provided with between piece produces fixing frequency letter for the reference voltage signal that PD module is producedNumber.
10. modulating system as claimed in claim 9, is characterized in that, described carrier frequency module is by GMSKThe frequency signal that phase signal changes by voltage-controlled module carries out amplitude decline, and PD module is logicalCrossing voltage-controlled module produces fixing frequency signal and carries out carrier frequency output.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510969446.XA CN105610464A (en) | 2015-12-21 | 2015-12-21 | Method and system for two-point injection type modulation of transmitter in data set |
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| CN201510969446.XA CN105610464A (en) | 2015-12-21 | 2015-12-21 | Method and system for two-point injection type modulation of transmitter in data set |
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