CN107911141A - A kind of system for reducing communication terminal frequency and phase error - Google Patents
A kind of system for reducing communication terminal frequency and phase error Download PDFInfo
- Publication number
- CN107911141A CN107911141A CN201711132932.1A CN201711132932A CN107911141A CN 107911141 A CN107911141 A CN 107911141A CN 201711132932 A CN201711132932 A CN 201711132932A CN 107911141 A CN107911141 A CN 107911141A
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- Prior art keywords
- communication terminal
- phase error
- frequency
- reduced
- terminal frequency
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- 238000004891 communication Methods 0.000 title claims abstract description 40
- 230000003321 amplification Effects 0.000 claims description 2
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 2
- 230000008859 change Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
-
- 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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0458—Arrangements for matching and coupling between power amplifier and antenna or between amplifying stages
-
- 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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
- H04B1/1036—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
The present invention relates to communication terminal technical field, a kind of more particularly to system for reducing communication terminal frequency and phase error, by concatenating a wave filter between transceiver and match circuit, the signal of power amplifier transmitting is switched through dual-mode antenna, match circuit, low noise amplifier are coupled to the voltage controlled oscillator of transceiver effectively to suppress, and prevents that the signal from producing interference to voltage controlled oscillator and influences the precision of voltage controlled oscillator；And then frequency error and phase error are effectively reduced, improve the performance of communication terminal.
Description
Technical field
The present invention relates to communication terminal technical field, more particularly to a kind of reduction communication terminal frequency and phase
The system of error.
Background technology
With the development of society, people are higher and higher to the performance requirement of communication terminal, and focus more on mobile logical
Interrogate the property indices of terminal.And frequency error and phase error are very important two of mobile communication terminal devices refers to
Mark.For the communicating terminal of GSM standards, frequency error and phase error are of crucial importance.If frequency error and phase are missed
Difference is larger, then communicating terminal, which largely can not achieve, calls function or there is a phenomenon where " call drop ".Therefore, change
The frequency error and phase error of kind communicating terminal seem increasingly important.
The transmitting of existing communication terminal and reception loop structure are as shown in Figure 1, including transceiver, power amplification
Device, match circuit, dual-mode antenna switch and antenna.By Fig. 1, it can be evident that, if connection transmitting and reception circuit
Dual-mode antenna switch isolation degree it is bad, partly by power amplifier launch signal 1 (less buckling curve table is used in figure
Show) can be switched through dual-mode antenna, receive match circuit, low noise amplifier is coupled to the voltage controlled oscillator of transceiver, this
The coupling path of signal 1 is as shown in curve 2 in figure.It is subject to the voltage controlled oscillator modulation accuracy that signal 1 disturbs to be deteriorated, and then directly
It result in the increase of signal frequency error and phase error.This is that those skilled in the art do not expect to see.
The content of the invention
For above-mentioned problem, the invention discloses it is a kind of reduce communication terminal frequency and phase error be
System, including transceiver, power amplifier, wave filter and dual-mode antenna switch；
The transmitting terminal of the transceiver is connected by the power amplifier and dual-mode antenna switch；
The receiving terminal of the transceiver is connected by the wave filter and dual-mode antenna switch.
The above-mentioned system for reducing communication terminal frequency and phase error, wherein, the transceiver includes low noise
Power amplifier and voltage controlled oscillator.
The above-mentioned system for reducing communication terminal frequency and phase error, wherein, the voltage controlled oscillator is pressed for LC
Control oscillator.
The above-mentioned system for reducing communication terminal frequency and phase error, wherein, the system also includes matching electricity
Road；
The wave filter is connected by the match circuit and dual-mode antenna switch.
The above-mentioned system for reducing communication terminal frequency and phase error, wherein, the match circuit is impedance
With circuit.
The above-mentioned system for reducing communication terminal frequency and phase error, wherein, the system also includes antenna；
The antenna is connected with dual-mode antenna switch.
The above-mentioned system for reducing communication terminal frequency and phase error, wherein, the wave filter is low-pass filtering
Device.
The above-mentioned system for reducing communication terminal frequency and phase error, wherein, the power amplifier is radio frequency
Power amplifier.
The above-mentioned system for reducing communication terminal frequency and phase error, wherein, the communication terminal is hand
Machine.
The above-mentioned system for reducing communication terminal frequency and phase error, wherein, the communication terminal is GSM
Standard mobile phone.
Foregoing invention has the following advantages that or beneficial effect：
The invention discloses a kind of system for reducing communication terminal frequency and phase error, by transceiver and
With concatenating a wave filter between circuit, switched with effectively suppressing the signal of power amplifier transmitting through dual-mode antenna, match circuit,
Low noise amplifier is coupled to the voltage controlled oscillator of transceiver, prevents the signal from producing interference to voltage controlled oscillator and influencing
The precision of voltage controlled oscillator；And then frequency error and phase error are effectively reduced, improve the performance of communication terminal.
Brief description of the drawings
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, the present invention and its feature, outer
Shape and advantage will become more apparent.Identical mark indicates identical part in whole attached drawings.Not can according to than
Example draws attached drawing, it is preferred that emphasis is shows the purport of the present invention.
Fig. 1 is the transmitting of communication terminal in background of invention and the structure diagram for receiving loop structure；
Fig. 2 is the structure diagram for the system that communication terminal frequency and phase error are reduced in the embodiment of the present invention.
Embodiment
The present invention is further illustrated with specific embodiment below in conjunction with the accompanying drawings, but not as the limit of the present invention
It is fixed.
As shown in Fig. 2, the present embodiment is related to a kind of system for reducing communication terminal frequency and phase error, specifically
, which includes transceiver, power amplifier, match circuit, wave filter, dual-mode antenna switch and antenna；The hair of transceiver
Penetrate end to connect by power amplifier and dual-mode antenna switch, and then be connected with antenna, form transmitting link, the reception of transceiver
End passes sequentially through wave filter, match circuit and dual-mode antenna switch and connects, and then is connected with antenna, forms receives link.
In a preferred embodiment of the invention, above-mentioned match circuit is impedance matching circuit.
In a preferred embodiment of the invention, above-mentioned wave filter is low-pass filter.
In a preferred embodiment of the invention, above-mentioned power amplifier is radio-frequency power amplifier.
In an embodiment of the present invention, above-mentioned transceiver includes low noise amplifier and voltage controlled oscillator, specifically,
Above-mentioned wave filter, which is serially connected between low noise amplifier and match circuit, can suppress out of band signal well (relative to connecing
The frequency of link is received, the frequency for launching link is out of band signal)；Preferably, which is LC voltage controlled oscillators.The band
External signal is due to the bad generation of dual-mode antenna switch isolation degree of connection transmitting link and receives link, and even connection is launched
Link and the dual-mode antenna switch isolation degree of receives link are bad, then part (is adopted by the signal 100 of power amplifier transmitting in figure
Being represented with less buckling curve) meeting switch through dual-mode antenna, receive match circuit, low noise amplifier is coupled to transmitting-receiving
The voltage controlled oscillator of machine, the path of the signal 100 vivid can be found out, partly by power as shown in curve 2 in figure by Fig. 2
The signal 100 that amplifier is launched receives great suppression after dual-mode antenna switchs, match circuit enters wave filter,
So that the signal 100 is difficult to be coupled to voltage controlled oscillator through low noise amplifier, so as to prevent the signal 100 from shaking to voltage-controlled
Device is swung to produce interference and influence the precision of voltage controlled oscillator；And then frequency error and phase error are effectively reduced, improve shifting
The performance of dynamic communicating terminal.
In a preferred embodiment of the invention, communication terminal is GSM standard mobile phones.
To sum up, the invention discloses a kind of system for reducing communication terminal frequency and phase error, by receiving and dispatching
A wave filter is concatenated between the low noise amplifier and match circuit of machine, effectively to suppress the signal of power amplifier transmitting
Switched through dual-mode antenna, match circuit, low noise amplifier are coupled to the voltage controlled oscillator of transceiver, prevent the signal pair
Voltage controlled oscillator produces interference and influences the precision of voltage controlled oscillator；And then frequency error and phase error are effectively reduced, carry
The performance of communication terminal is risen.
It should be appreciated by those skilled in the art that those skilled in the art combine the prior art and above-described embodiment can be with
Realize change case, this will not be repeated here.Such change case has no effect on the substantive content of the present invention, and it will not be described here.
Presently preferred embodiments of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, wherein the equipment and structure be not described in detail to the greatest extent are construed as giving reality with the common mode in this area
Apply；Any those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the disclosure above
Methods and technical content many possible changes and modifications are made to technical solution of the present invention, or be revised as equivalent variations etc.
Embodiment is imitated, this has no effect on the substantive content of the present invention.Therefore, every content without departing from technical solution of the present invention, foundation
The technical spirit of the present invention still falls within the present invention to any simple modifications, equivalents, and modifications made for any of the above embodiments
In the range of technical solution protection.
Claims (10)
1. a kind of system for reducing communication terminal frequency and phase error, it is characterised in that including transceiver, power amplification
Device, wave filter and dual-mode antenna switch；
The transmitting terminal of the transceiver is connected by the power amplifier and dual-mode antenna switch；
The receiving terminal of the transceiver is connected by the wave filter and dual-mode antenna switch.
2. the system of communication terminal frequency and phase error is reduced as claimed in claim 1, it is characterised in that the receipts
Hair machine includes low noise amplifier and voltage controlled oscillator.
3. the system of communication terminal frequency and phase error is reduced as claimed in claim 2, it is characterised in that the pressure
Control oscillator is LC voltage controlled oscillators.
4. the system of communication terminal frequency and phase error is reduced as claimed in claim 1, it is characterised in that the system
System further includes match circuit；
The wave filter is connected by the match circuit and dual-mode antenna switch.
5. the system of communication terminal frequency and phase error is reduced as claimed in claim 4, it is characterised in that described
It is impedance matching circuit with circuit.
6. the system of communication terminal frequency and phase error is reduced as claimed in claim 1, it is characterised in that the system
System further includes antenna；
The antenna is connected with dual-mode antenna switch.
7. the system of communication terminal frequency and phase error is reduced as claimed in claim 1, it is characterised in that the filter
Ripple device is low-pass filter.
8. the system of communication terminal frequency and phase error is reduced as claimed in claim 1, it is characterised in that the work(
Rate amplifier is radio-frequency power amplifier.
9. the system of communication terminal frequency and phase error is reduced as claimed in claim 1, it is characterised in that the shifting
Dynamic communicating terminal is mobile phone.
10. the system of communication terminal frequency and phase error is reduced as claimed in claim 9, it is characterised in that described
Communication terminal is GSM standard mobile phones.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711132932.1A CN107911141A (en) | 2017-11-15 | 2017-11-15 | A kind of system for reducing communication terminal frequency and phase error |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711132932.1A CN107911141A (en) | 2017-11-15 | 2017-11-15 | A kind of system for reducing communication terminal frequency and phase error |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107911141A true CN107911141A (en) | 2018-04-13 |
Family
ID=61845581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711132932.1A Pending CN107911141A (en) | 2017-11-15 | 2017-11-15 | A kind of system for reducing communication terminal frequency and phase error |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107911141A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1592450A (en) * | 2003-08-29 | 2005-03-09 | 台达电子工业股份有限公司 | Front-end modules for mobile communication systems |
| CN1795617A (en) * | 2003-05-29 | 2006-06-28 | 索尼爱立信移动通讯股份有限公司 | Quad band antenna interface modules including matching network ports |
| CN102625477A (en) * | 2012-04-01 | 2012-08-01 | 河北人天通信技术有限公司 | 3G (third-generation) broadband digitalized super-remote wireless transmission system |
| CN103001687A (en) * | 2012-12-21 | 2013-03-27 | 北京工业大学 | A receiving device for receiving GSM-R signals |
| CN104160631A (en) * | 2012-03-01 | 2014-11-19 | 高通股份有限公司 | Frequency synthesizer architecture in a time-division duplex mode for a wireless device |
| CN105375936A (en) * | 2015-10-22 | 2016-03-02 | 上海斐讯数据通信技术有限公司 | Mobile communication terminal common antenna circuit |
-
2017
- 2017-11-15 CN CN201711132932.1A patent/CN107911141A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1795617A (en) * | 2003-05-29 | 2006-06-28 | 索尼爱立信移动通讯股份有限公司 | Quad band antenna interface modules including matching network ports |
| CN1592450A (en) * | 2003-08-29 | 2005-03-09 | 台达电子工业股份有限公司 | Front-end modules for mobile communication systems |
| CN104160631A (en) * | 2012-03-01 | 2014-11-19 | 高通股份有限公司 | Frequency synthesizer architecture in a time-division duplex mode for a wireless device |
| CN102625477A (en) * | 2012-04-01 | 2012-08-01 | 河北人天通信技术有限公司 | 3G (third-generation) broadband digitalized super-remote wireless transmission system |
| CN103001687A (en) * | 2012-12-21 | 2013-03-27 | 北京工业大学 | A receiving device for receiving GSM-R signals |
| CN105375936A (en) * | 2015-10-22 | 2016-03-02 | 上海斐讯数据通信技术有限公司 | Mobile communication terminal common antenna circuit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180413 |
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| RJ01 | Rejection of invention patent application after publication |