CN106559377A - Send carrier generating circuit - Google Patents
Send carrier generating circuit Download PDFInfo
- Publication number
- CN106559377A CN106559377A CN201610946773.8A CN201610946773A CN106559377A CN 106559377 A CN106559377 A CN 106559377A CN 201610946773 A CN201610946773 A CN 201610946773A CN 106559377 A CN106559377 A CN 106559377A
- Authority
- CN
- China
- Prior art keywords
- signal
- carrier
- frequency
- carrier signals
- generating circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/36—Modulator circuits; Transmitter circuits
- H04L27/362—Modulation using more than one carrier, e.g. with quadrature carriers, separately amplitude modulated
Abstract
The invention discloses a kind of improved transmission carrier generating circuit.The characteristics of this circuit is first the signal that two voltage-controlled oscillators are produced to be mixed with multiplier, then the low frequency signal after mixing is filtered with a band filter, high-frequency signal after being mixed, then the orthogonal signal of two-way is isolated from this high-frequency signal as quadrature carrier signals with a phase separator, the quadrature carrier signals produced by a voltage-controlled oscillator in replacing traditional transtation mission circuit go to be modulated two-way orthogonal data signals.The present invention can improve impact of the power amplifier in transtation mission circuit to sending performance.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of improved transmission carrier generating circuit.
Background technology
Traditional transtation mission circuit is as shown in figure 1, the transtation mission circuit produces orthogonal carrier wave by a voltage-controlled oscillator
Signal, is referred to as I road carrier signals and Q road carrier signals, and this two paths of signals is homologous, simply 90 degree of phase.Two
Circuit-switched data, referred to as I circuit-switched datas and Q circuit-switched datas are done multiplying with I road carrier signals and Q road carrier signals respectively and are mixed, and use
After one adder is added, then amplify through power amplifier, sent by antenna.
Here, power amplifier due to power consumption it is big, so the interference signal of the frequency as signal is amplified can be produced, to which
Its module is interfered.Voltage-controlled oscillator is especially sensitive to the interference near its frequency of oscillation, such power amplifier
Interference just produces very big adverse effect to the performance of transtation mission circuit by voltage-controlled oscillator.
How to reduce interference of the power amplifier to voltage-controlled oscillator is problem to be solved by this invention.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of transmission carrier generating circuit, can improve in transtation mission circuit
Impact of the power amplifier to sending performance.
For solve above-mentioned technical problem, the present invention transmission carrier generating circuit, including：
One first voltage controls agitator, for producing the carrier signal that frequency is f1；
One second voltage controls agitator, for producing the carrier signal that frequency is f2；
One first multiplier, is mixed for the carrier signal of f2 for the carrier signal and frequency by frequency for f1, is obtained
To the carrier signal of two frequencies that frequency is f1+f2 and f1-f2；
One band pass filter circuit, for the carrier signal that rejection frequency is f1-f2, carrier wave of the reserve frequency for f1+f2
Signal；
One phase separator, for isolating two quadrature phases in the carrier signal from frequency for f1+f2, frequency is f1
The signal of+f2, i.e. I road carrier signals and Q road carrier signals, as quadrature carrier signals and export；
Wherein, f1 and f2 is positive count.
Using the transmission carrier generating circuit of the present invention, as two voltage-controlled oscillators are operated in f1 respectively, f2 this
In two frequencies, and the interference that power amplifier is produced is in f1+f2 frequencies, is separate in such frequency, and this can just cause
The interference that power amplifier is produced cannot have much impact to voltage-controlled oscillator, so as to improve the property of transtation mission circuit
Energy.
Description of the drawings
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings：
Fig. 1 is existing transtation mission circuit schematic diagram；
Fig. 2 is the transmission schematic diagram of the carrier generating circuit in transtation mission circuit.
Specific embodiment
With reference to shown in Fig. 2, the transmission carrier generating circuit, including two voltage-controlled oscillators (first voltage controls
Agitator and second voltage control agitator), one first multiplier, a band pass filter circuit, a phase separator.
Two voltage-controlled oscillators produce frequency respectively for f1, two carrier waves of f2, then by the first multiplier circuit
F1, f2 the two carrier frequency mixings obtain f1+f2, and then the carrier signal of two frequencies of f1-f2 uses the bandpass filtering
Device filters the f1-f2 frequency carrier signals (low frequency signal) after mixing, obtains f1+f2 frequency carrier signals (high-frequency signal), should
F1+f2 frequency carrier signals obtain two quadrature phases, signal conduct of the frequency for f1+f2 again by the phase separator
Quadrature carrier signals, output of the two signals as the transmission carrier generating circuit, by one in the traditional transtation mission circuit of replacement
The quadrature carrier signals that individual voltage-controlled oscillator is produced go to be modulated two-way orthogonal data signals.Wherein f1 and f2 is to appoint
Meaning positive number.
Also include in the circuit described in Fig. 2：
One second multiplier, is modulated to the I roads signal to be modulated being input into the I road carrier signals.
One the 3rd multiplier, is modulated to the Q roads signal to be modulated being input into the Q road carrier signals.
One adder, is added with Q roads signal to the I roads signal after modulation.
One power amplifier, is amplified for the signal after being added to the adder, then sends through antenna.
The present invention is described in detail above by specific embodiment, but these have not been constituted to the present invention's
Limit.Without departing from the principles of the present invention, those skilled in the art can also make many deformations and improvement, these
Should be regarded as protection scope of the present invention.
Claims (3)
1. it is a kind of to send carrier generating circuit, it is characterised in that to include：
One first voltage controls agitator, for producing the carrier signal that frequency is f1；
One second voltage controls agitator, for producing the carrier signal that frequency is f2；
One first multiplier, is mixed for the carrier signal of f2 for the carrier signal and frequency by frequency for f1, is obtained frequency
Carrier signal of the rate for two frequencies of f1+f2 and f1-f2；
One band pass filter circuit, for the carrier signal that rejection frequency is f1-f2, carrier signal of the reserve frequency for f1+f2；
One phase separator, for isolating two quadrature phases in the carrier signal from frequency for f1+f2, frequency is f1+f2
Signal, i.e. I road carrier signals and Q road carrier signals as quadrature carrier signals and are exported；
Wherein, f1 and f2 is positive count.
It is 2. as claimed in claim 1 to send carrier generating circuit, it is characterised in that：I road carrier signals and Q road carrier signals are same
Source, 90 degree of phase.
3. it is as claimed in claim 1 to send carrier generating circuit, it is characterised in that also to include：
One second multiplier, is modulated to the I roads signal to be modulated being input into the I road carrier signals；
One the 3rd multiplier, is modulated to the Q roads signal to be modulated being input into the Q road carrier signals；
One adder, is added with Q roads signal to the I roads signal after modulation；
One power amplifier, is amplified for the signal after being added to the adder, then sends through antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610946773.8A CN106559377A (en) | 2016-10-26 | 2016-10-26 | Send carrier generating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610946773.8A CN106559377A (en) | 2016-10-26 | 2016-10-26 | Send carrier generating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106559377A true CN106559377A (en) | 2017-04-05 |
Family
ID=58443457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610946773.8A Pending CN106559377A (en) | 2016-10-26 | 2016-10-26 | Send carrier generating circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106559377A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133513A (en) * | 1994-11-22 | 1996-10-16 | 三星电子株式会社 | Data transmitter and receiver for pilot frequency channel adopted expanded frequency spectrum communication system |
| CN1328388A (en) * | 2000-06-08 | 2001-12-26 | 日本电气株式会社 | Direct converting receiver and radio receiver-transmitter |
| CN1684357A (en) * | 2004-03-24 | 2005-10-19 | 三星电子株式会社 | Wideband i/q signal generation device |
| CN105791204A (en) * | 2016-04-29 | 2016-07-20 | 中国人民解放军国防科学技术大学 | Full-digital envelope detection demodulation method of alternating current IRIG-B code and apparatus thereof |
-
2016
- 2016-10-26 CN CN201610946773.8A patent/CN106559377A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1133513A (en) * | 1994-11-22 | 1996-10-16 | 三星电子株式会社 | Data transmitter and receiver for pilot frequency channel adopted expanded frequency spectrum communication system |
| CN1328388A (en) * | 2000-06-08 | 2001-12-26 | 日本电气株式会社 | Direct converting receiver and radio receiver-transmitter |
| CN1684357A (en) * | 2004-03-24 | 2005-10-19 | 三星电子株式会社 | Wideband i/q signal generation device |
| CN105791204A (en) * | 2016-04-29 | 2016-07-20 | 中国人民解放军国防科学技术大学 | Full-digital envelope detection demodulation method of alternating current IRIG-B code and apparatus thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170405 |
|
| WD01 | Invention patent application deemed withdrawn after publication |