CN106603094A - RF emission method and circuit - Google Patents
RF emission method and circuit Download PDFInfo
- Publication number
- CN106603094A CN106603094A CN201611058745.9A CN201611058745A CN106603094A CN 106603094 A CN106603094 A CN 106603094A CN 201611058745 A CN201611058745 A CN 201611058745A CN 106603094 A CN106603094 A CN 106603094A
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- radio
- frequency transmissions
- power amplifier
- signal
- circuit
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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
- H04B1/02—Transmitters
- H04B1/04—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
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
-
- 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
- H04B2001/0408—Circuits with power amplifiers
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transmitters (AREA)
Abstract
The invention discloses an RF emission method and circuit. The method comprise that an RF emission power amplification circuit is determined to be in an OFF state; the RF emission power amplification circuit is started to amplify a signal to be emitted; and the amplified signal to be emitted is emitted. Thus, ground noise can be reduced, and the problem that GSM PvT exceeds the standard is solved to certain extent.
Description
Technical field
The present invention relates to rf modulations field, the method and circuit of more particularly to a kind of radio-frequency transmissions.
Background technology
3GPP (3rd Generation Partnership Project, third generation partner program) standard is required
GSM (Global System for Mobile Communication, global system for mobile communications) PvT under each power grade
(Power versus Time, Power x Time template) frequency spectrum will meet specific frequency spectrum framework.If PvT is exceeded, Ke Nengying
Other indexs of RF are rung, spectrum, modulation spectrum, phase error etc. is such as switched, in some instances it may even be possible to which directly resulting in GSM phones cannot be normal
Dial-out is gone, and has had a strong impact on Consumer's Experience.And experiences and practices show, PVT is exceeded to be mostly occurred under low power level, especially
Especially prominent when under GSM high frequencies (GSM1800 and GSM1900) and lowest power grade, the bottom for being essentially due to PvT is made an uproar too
What height caused.
The content of the invention
The invention mainly solves the technical problem of providing a kind of method and circuit of radio-frequency transmissions, GSM can be improved
PvT exceeded problem.
To solve above-mentioned technical problem, one aspect of the present invention is：A kind of method of radio-frequency transmissions is provided,
Methods described includes：Determine that radio-frequency transmissions power amplifier is closed；Radio-frequency transmissions power amplifier is opened, to utilize radio frequency
Transmitting power amplifier is amplified to signal to be transmitted；Signal to be transmitted after amplification is sent.
Wherein it is determined that radio-frequency transmissions power amplifier is closed including：Before signal to be transmitted sends, close
Close radio-frequency transmissions power amplifier.
Wherein, closing radio-frequency transmissions power amplifier includes：Antenna switch module is closed, and then closes radio-frequency transmissions power amplifier electricity
Road.
Wherein it is determined that before radio-frequency transmissions power amplifier is closed, including：Whether judge the power of radio-frequency transmissions
In threshold range；If the power of radio-frequency transmissions is in threshold range, performs and determine radio-frequency transmissions power amplifier in closing
The step of state.
Wherein, threshold value is lowest power grade PCL (Power Control Level, Power Control grade) 15.
To solve above-mentioned technical problem, another technical solution used in the present invention is：A kind of radio frequency transmitter circuitry is provided,
Including：Control circuit, determines that radio-frequency transmissions power amplifier is closed, and sends opening radio-frequency transmissions power amplifier letter
Number；Radio-frequency transmissions power amplifier, opens when signal is received, to be amplified to signal to be transmitted；Antenna, after amplification
Signal to be transmitted sends.
Wherein, also include：On-off circuit, for before signal to be transmitted sends, closing radio-frequency transmissions power amplifier electricity
Road.
Wherein, on-off circuit specifically for：Antenna switch module is closed, and then closes radio-frequency transmissions power amplifier.
Wherein, including：Decision circuitry, for judging the power of radio-frequency transmissions whether in threshold range；Execution circuit, uses
If when the power of radio-frequency transmissions is in threshold range, performing and determining the step of radio-frequency transmissions power amplifier is closed.
Wherein, threshold value is lowest power grade PCL15.
Above scheme, the control circuit of radio frequency transmitter circuitry determine that radio-frequency transmissions power amplifier is closed and sends
Radio-frequency transmissions power amplifier signal is opened, radio-frequency transmissions power amplifier receives signal and opens, to carry out to signal to be transmitted
Amplify, finally the signal to be transmitted after amplification is sent by antenna, bottom can be reduced and made an uproar, and then it is exceeded to improve GSM PvT
Problem.
Description of the drawings
Fig. 1 is the schematic flow sheet of one embodiment of RF transmission method of the present invention；
Fig. 2 is the schematic flow sheet of another embodiment of RF transmission method of the present invention；
Fig. 3 is that the present invention does not improve the bottom before GSM PvT and makes an uproar time plot；
Fig. 4 is that the present invention improves the bottom after GSM PvT and makes an uproar time plot；
Fig. 5 is the structural representation of one embodiment of circuit of radio-frequency transmissions of the present invention；
Fig. 6 is the structural representation of another embodiment of circuit of radio-frequency transmissions of the present invention；
Fig. 7 is the structural representation of the another embodiment of circuit of radio-frequency transmissions of the present invention.
Specific embodiment
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is referred to, Fig. 1 is the schematic flow sheet of one embodiment of RF transmission method of the present invention.If it is noted that
There is substantially the same result, the method for the present invention is not limited with the flow process order shown in Fig. 1.As shown in figure 1, the method bag
Include following steps：
S101：Determine that radio-frequency transmissions power amplifier is closed.
Digital mobile telephone network network standards of the GSM by Europe exploitation, its exploitation purpose is to allow all parts of the world to be used in conjunction with
One mobile telephone network standard, user can just be manageed it all over the whole world using a mobile phone.Gsm system includes GSM900：900MHz、
GSM1800：1800MHz and GSM1900：Several frequency ranges such as 1900MHz.
Gsm protocol specifies that mobile phone transmission power can be to be controlled by base station.Base station passes through descending SACCH (Slow
Associated Control Channel, slow associated control channel) channel, send the transmission power level that order controls mobile phone
Not, each power level difference 2dB.For example, GSM900 mobile phones maximum transmission power rank is 5 (33dBm), minimum emissive power level
It is not 19 (5dBm)；GSM1800 mobile phones and GSM1900 mobile phone maximum transmission power ranks are 0 (30dBm), minimum emissive power
Rank is 15 (0dBm).When mobile phone is away from base station, or in wireless shadow region when, base station can order mobile phone send larger work(
Rate, until 33dBm (GSM900), to overcome long-distance transmissions or building to block caused loss of signal.If mobile phone from
Base station is close, and during without any shelter, base station can order mobile phone send smaller power, until 5dBm (GSM900), to subtract
Few mobile phone, and so can be with to cochannel, the interference of other GSM users of adjacent channel and the interference of other wireless devices
Effective extending cell phone stand-by time, air time.
Wherein, gsm system limits handset emissions letter by the modulation spectrum to mobile phone transmission signal and the regulation of switching spectrum
Number when spectral bandwidth and shape, to reduce interference, the especially interference of side channel user.Therefore, gsm system is guarantee communication
Quality, it is stipulated that the transmission power of mobile phone is controlled by base station, changeable as needed, but while and strict regulations mobile phone
" shape " (PvT, ORFS) of the transmission signal in time domain and frequency domain, this undoubtedly significantly limit again, and mobile phone is external to be done
Disturb.And in general, PvT is exceeded to be mostly occurred under low power level, especially GSM high frequencies (GSM1800 and GSM1900)
And it is especially prominent under lowest power grade.Trace it to its cause, be essentially due to PvT bottom make an uproar it is too high so that causing GSM
The bottom of PvT rising edges level of making an uproar is higher and cause.Therefore, if can be to reduce the noise level before PvT rising edges, can
To improve problem PvT exceeded under GSM low power levels.
Therefore, before the work of radio-frequency transmissions power amplifier, allow which to be closed, it is ensured that in power amplifier not
Noise can be amplified, so as to reduce the noise level before PvT rising edges.
Alternatively, before armed useful signal sends, close radio-frequency transmissions power amplifier.
Alternatively, antenna switch module (Antenna Switch Module, abbreviation ASM) is closed, and then closes radio frequency and sent out
Penetrate power amplifier.
Wherein, antenna switch module is used for the radio frequency leading portion of mobile phone, acts on same duplexer filter, as GSM mobile handset is used
TDMA (Time Division Multiple Access, time division multiple acess) technology, receiver and transmitter discontinuous operation, patrol
Collect under the control of circuit, duplexer is connect to receiver or transmitter channels in appropriate time slot.
S102：Radio-frequency transmissions power amplifier is opened, to be amplified to signal to be transmitted using radio-frequency transmissions power amplifier.
Now, after opening radio-frequency transmissions power amplifier, radio-frequency transmissions power amplifier is only amplified to useful signal.
S103：Signal to be transmitted after amplification is sent.
Useful signal is Jing after radio-frequency transmissions power amplifier is amplified to power demand, then Jing duplexers are fed on antenna for mobile phone
Launch.
Wherein, it is will to launch and receive signal to be isolated that duplexer is acted on, it is ensured that receiving and launch can be while normal work
Make.It is made up of the band elimination filter of two groups of different frequencies, it is to avoid the machine transmission signal is transferred to receiver.
In the present embodiment, the control circuit of radio frequency transmitter circuitry determines that radio-frequency transmissions power amplifier is closed
And opening radio-frequency transmissions power amplifier signal is sent, radio-frequency transmissions power amplifier receives signal and opens, with to letter to be launched
Number it is amplified, finally the signal to be transmitted after amplification is sent by antenna, bottom can be reduced and made an uproar, and then improve GSM
PvT exceeded problem.
Fig. 2 is referred to, Fig. 2 is the schematic flow sheet of RF transmission method a further embodiment of the present invention.Present embodiment
In, the method is comprised the following steps：
S201：Judge the power of radio-frequency transmissions whether in threshold range.
The GSM mobile handset of different operating frequency, the threshold value of the power of its radio-frequency transmissions is different.GSM900 mobile phones are maximum to be sent out
It is 5 (33dBm) to penetrate power level, and minimum emissive power rank is 19 (5dBm), and GSM1800 mobile phones and GSM1900 mobile phones are maximum
Power level is 0 (30dBm), and minimum emissive power rank is 15 (0dBm).That is to say, judge in GSM high frequencies
When (GSM1800 and GSM1900), whether the power of its radio-frequency transmissions is in minimum emissive power rank.
S202：If the power of radio-frequency transmissions is in threshold range, performs and determine radio-frequency transmissions power amplifier in closing
The step of state.
If at GSM high frequencies (GSM1800 and GSM1900), the power of its radio-frequency transmissions is in minimum emissive power
Rank, then close radio-frequency transmissions power amplifier.
Wherein, minimum emissive power grade is PCL15.
S203：Determine that radio-frequency transmissions power amplifier is closed.
Can as above described in S101, therefore not to repeat here.
S204：Radio-frequency transmissions power amplifier is opened, to be amplified to signal to be transmitted using radio-frequency transmissions power amplifier.
Can as above described in S102, therefore not to repeat here.
S205：Signal to be transmitted after amplification is sent.
Can as above described in S103, therefore not to repeat here.
Wherein in an embodiment, as shown in Figure 3 and Figure 4, Fig. 3 is that the time of making an uproar of the bottom before not improving GSM PvT is bent
Line chart, Fig. 4 are that the bottom after improving GSM PvT is made an uproar time plot.Fig. 3 is the power for directly amplifying transmission signal until sending out
Penetrate, wherein, the signal includes noise signal and useful signal.As seen from Figure 3, under low power level, PvT rising edges it
Front noise level is higher, that is to say that normal line 32 is approached in 31 parts in Fig. 3 very much, so easilys lead to follow-up PvT
Curve is exceeded.Fig. 4 is, before the work of radio-frequency transmissions power amplifier, to close antenna switch module, and then close radio-frequency transmissions power amplifier
Circuit, then opens radio-frequency transmissions power amplifier again, to be amplified to signal to be transmitted using radio-frequency transmissions power amplifier, then
Jing duplexers are fed on antenna for mobile phone to be launched.As seen from Figure 4, under low power level, before PvT rising edges
Noise level is reduced, 31 partial distance normal lines 32 in that is to say 41 partial distance normal lines 42 in Fig. 4 than Fig. 3
Distance it is remote, improve the GSM PvT curves under low power level.
In the present embodiment, the control circuit of radio frequency transmitter circuitry determines that radio-frequency transmissions power amplifier is closed
And opening radio-frequency transmissions power amplifier signal is sent, radio-frequency transmissions power amplifier receives signal and opens, with to letter to be launched
Number it is amplified, finally the signal to be transmitted after amplification is sent by antenna, bottom can be reduced and made an uproar, and then improve GSM
PvT exceeded problem.
Fig. 5 is referred to, Fig. 5 is the structural representation of one embodiment of circuit of radio-frequency transmissions of the present invention.Present embodiment
In, the circuit 50 of the radio-frequency transmissions is the circuit of the radio-frequency transmissions in above-mentioned embodiment, and the circuit 50 of the radio-frequency transmissions includes：
Control circuit 51, radio-frequency transmissions power amplifier 52, antenna 53.
Control circuit 51 is used to determine that radio-frequency transmissions power amplifier is closed, and sends opening radio-frequency transmissions power amplifier
Circuit signal.
Radio-frequency transmissions power amplifier 52 is opened when signal is received, to be amplified to signal to be transmitted.
Signal to be transmitted after amplification is sent by antenna 53.
Alternatively, 52 useful signals for receiving of radio-frequency transmissions power amplifier are amplified to power demand.
Alternatively, useful signal is Jing after radio-frequency transmissions power amplifier 52 is amplified to power demand, then Jing duplexers are fed to
Launch on antenna 53.
Fig. 6 is referred to, Fig. 6 is the structural representation of another embodiment of circuit of radio-frequency transmissions of the present invention.It is different from
One embodiment, the circuit 60 of radio-frequency transmissions described in present embodiment also include on-off circuit 61.
On-off circuit 61 cuts out radio-frequency transmissions power amplifier for before signal to be transmitted sends.
On-off circuit 61 is specifically for cutting out antenna switch module, and then closes radio-frequency transmissions power amplifier.
Fig. 7 is referred to, Fig. 7 is the structural representation of the another embodiment of circuit of radio-frequency transmissions of the present invention.It is different from
One embodiment, the circuit 70 of radio-frequency transmissions described in present embodiment include control circuit 51, on-off circuit 61, radio-frequency transmissions work(
Electric discharge road 52 and antenna 53.Wherein, control circuit 51 also includes decision circuitry 71 and execution circuit 72.
Whether decision circuitry 71 is used for the power for judging radio-frequency transmissions in threshold range.
If execution circuit 72 is in threshold range for the power of radio-frequency transmissions, performs and determine radio-frequency transmissions power amplifier
The step of being closed.
Optionally, decision circuitry 71 and execution circuit 72 are integrated in control circuit 51.
Wherein, threshold value is lowest power grade PCL15.
The modules of above-mentioned radio frequency transmitter circuitry 50/60/70 can perform correspondence step in said method embodiment respectively,
Therefore here is not repeated to each module, the explanation of above correspondence step is referred in detail.
In the present embodiment, the control circuit of radio frequency transmitter circuitry determines that radio-frequency transmissions power amplifier is closed
And opening radio-frequency transmissions power amplifier signal is sent, radio-frequency transmissions power amplifier receives signal and opens, with to letter to be launched
Number it is amplified, finally the signal to be transmitted after amplification is sent by antenna, bottom can be reduced and made an uproar, and then improve GSM
PvT exceeded problem.
Embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, is included within the scope of the present invention.
Claims (10)
1. a kind of method of radio-frequency transmissions, it is characterised in that include：
Determine that radio-frequency transmissions power amplifier is closed；
The radio-frequency transmissions power amplifier is opened, to be amplified to signal to be transmitted using the radio-frequency transmissions power amplifier；
Signal to be transmitted after the amplification is sent.
2. method according to claim 1, it is characterised in that the determination radio-frequency transmissions power amplifier is closed
Including：
Before the signal to be transmitted sends, the radio-frequency transmissions power amplifier is closed.
3. method according to claim 2, it is characterised in that the closing radio-frequency transmissions power amplifier includes：
Antenna switch module is closed, and then closes the radio-frequency transmissions power amplifier.
4. the method according to any one of claims 1 to 3, it is characterised in that at the determination radio-frequency transmissions power amplifier
Before closed mode, including：
Judge the power of the radio-frequency transmissions whether in threshold range；
If the power of the radio-frequency transmissions is in threshold range, the determination radio-frequency transmissions power amplifier is performed in closing shape
The step of state.
5. method according to claim 4, it is characterised in that the threshold value is lowest power grade PCL15.
6. a kind of radio frequency transmitter circuitry, it is characterised in that include：
Control circuit, determines that radio-frequency transmissions power amplifier is closed, and sends opening radio-frequency transmissions power amplifier signal；
Radio-frequency transmissions power amplifier, opens when the signal is received, to be amplified to signal to be transmitted；
Antenna, the signal to be transmitted after the amplification is sent.
7. circuit according to claim 6, it is characterised in that also include：
On-off circuit, for, before the signal to be transmitted sends, closing the radio-frequency transmissions power amplifier.
8. circuit according to claim 7, it is characterised in that
The on-off circuit specifically for：
Antenna switch module is closed, and then closes the radio-frequency transmissions power amplifier.
9. the circuit according to any one of claim 6 to 8, it is characterised in that include：
Decision circuitry, for judging the power of the radio-frequency transmissions whether in threshold range；
Execution circuit, if for the radio-frequency transmissions power be in threshold range when, perform it is described determination radio-frequency transmissions power amplifier
The step of circuit is closed.
10. circuit according to claim 9, it is characterised in that the threshold value is lowest power grade PCL15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611058745.9A CN106603094B (en) | 2016-11-22 | 2016-11-22 | A kind of method and circuit of radio-frequency transmissions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611058745.9A CN106603094B (en) | 2016-11-22 | 2016-11-22 | A kind of method and circuit of radio-frequency transmissions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106603094A true CN106603094A (en) | 2017-04-26 |
| CN106603094B CN106603094B (en) | 2019-11-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611058745.9A Active CN106603094B (en) | 2016-11-22 | 2016-11-22 | A kind of method and circuit of radio-frequency transmissions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711957A (en) * | 2018-05-30 | 2018-10-26 | Oppo广东移动通信有限公司 | Control method, processing unit and the electronic equipment for preventing RF index from interfering |
| CN112821517A (en) * | 2021-02-23 | 2021-05-18 | 维沃移动通信有限公司 | Electronic device and control method of electronic device |
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| CN1364351A (en) * | 1999-12-13 | 2002-08-14 | 皇家菲利浦电子有限公司 | Mobile communication device with two transmit antennas |
| CN101056463A (en) * | 2007-05-31 | 2007-10-17 | 武汉虹信通信技术有限责任公司 | A method for uplink and downlink time division switching management in the TD-SCDMA RF receiving and transmission module |
| CN101114860A (en) * | 2007-08-17 | 2008-01-30 | 华为技术有限公司 | Method and device for controlling power amplification |
| CN102316566A (en) * | 2011-09-27 | 2012-01-11 | 中兴通讯股份有限公司 | Method and device for reducing electric energy consumption of long term evolution (LTE) base station |
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| CN1364351A (en) * | 1999-12-13 | 2002-08-14 | 皇家菲利浦电子有限公司 | Mobile communication device with two transmit antennas |
| US20020084845A1 (en) * | 2000-12-29 | 2002-07-04 | Spectrian Corporation | Closed loop active cancellation technique (ACT) - based RF power amplifier linearization architecture |
| CN101056463A (en) * | 2007-05-31 | 2007-10-17 | 武汉虹信通信技术有限责任公司 | A method for uplink and downlink time division switching management in the TD-SCDMA RF receiving and transmission module |
| CN101114860A (en) * | 2007-08-17 | 2008-01-30 | 华为技术有限公司 | Method and device for controlling power amplification |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108711957A (en) * | 2018-05-30 | 2018-10-26 | Oppo广东移动通信有限公司 | Control method, processing unit and the electronic equipment for preventing RF index from interfering |
| CN112821517A (en) * | 2021-02-23 | 2021-05-18 | 维沃移动通信有限公司 | Electronic device and control method of electronic device |
| CN112821517B (en) * | 2021-02-23 | 2024-05-10 | 维沃移动通信有限公司 | Electronic device and control method of electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106603094B (en) | 2019-11-08 |
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