CN109150229A - Control the mobile terminal and tdd systems of the receiving sensitivity of TDD system - Google Patents
Control the mobile terminal and tdd systems of the receiving sensitivity of TDD system Download PDFInfo
- Publication number
- CN109150229A CN109150229A CN201811129276.4A CN201811129276A CN109150229A CN 109150229 A CN109150229 A CN 109150229A CN 201811129276 A CN201811129276 A CN 201811129276A CN 109150229 A CN109150229 A CN 109150229A
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- switch
- mobile terminal
- downlink
- noise
- receiving
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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
- H04B1/38—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
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
- H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
-
- 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
- H04B1/401—Circuits for selecting or indicating operating mode
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
- Bidirectional Digital Transmission (AREA)
Abstract
The invention discloses the mobile terminals and tdd systems of the receiving sensitivity of control TDD system, its mobile terminal includes: R-T unit, downlink low-noise amplifier, power amplifier device and filter, the second RF bidirectional switch built in the power amplifier device includes common end, first switch and second switch, the common end is connect with filter, the first switch is connect with the input terminal of downlink low-noise amplifier, its output end connects the receiving end connection of R-T unit, its transmitting terminal connects the second switch, baseband signal is connected to first switch or second switch according to the common end switching that the time slot state of tdd systems controls the second RF bidirectional switch to form different communication paths.The present invention only increases by 1 grade of downlink low-noise amplifier in the receiving path between power amplifier device and R-T unit, to reduce the noise coefficient of entire tdd systems, to improve the sensitivity of TDD system, improves user experience.
Description
Technical field
The present invention relates to fields of communication technology, and in particular to a kind of mobile terminal for the receiving sensitivity for controlling TDD system
And tdd systems.
Background technique
The mobile terminals access carrier communication network such as smart phone needs to receive from baseband signal, in traditional TDD
Under (Time Division Duplex, TDD mode) system operating mode, because there is insertion in the device of receiving path
The transmission loss (loss) of loss and PCB trace, so that the baseband signal that antenna receives is cut before reaching R-T unit
It is weak, it can not be improved so as to cause mobile terminal receiving sensitivity, performance is poor.In this way, the situation poor in receiving sensitivity
Under, especially in the remote districts of signal covering, frequently results in the communication of mobile terminal such as mobile phone and frequently go offline, influence user's body
It tests.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
The technical problem to be solved in the present invention is that in view of the above drawbacks of the prior art, providing a kind of control TDD system
Receiving sensitivity mobile terminal and tdd systems, it is logical by reception between power amplifier device and R-T unit
Road increases by 1 grade of downlink low-noise amplifier, to reduce the noise coefficient of entire tdd systems, to improve TDD system
Sensitivity, improve user experience.
The technical proposal for solving the technical problem of the invention is as follows:
A kind of mobile terminal for the receiving sensitivity controlling TDD system, including terminal body, in the terminal body
It is provided with pcb board, R-T unit, downlink low-noise amplifier, power amplifier device and filter are provided on the pcb board
Wave device, the power amplifier device include the second RF bidirectional switch (301), and the second RF bidirectional switch (301) includes
Common end (RFC), first switch (RF1) and second switch (RF2), the common end (RFC) connect with the filter, institute
First switch (RF1) is stated to connect with the input terminal of the downlink low-noise amplifier, the downlink low-noise amplifier
Output end is connect with the receiving end (RX) of the R-T unit, the transmitting terminal of second switch (RF2) and the R-T unit
(TX) it connects, baseband signal controls the public affairs of the second RF bidirectional switch (301) according to the time slot state of tdd systems
End (RFC) switching altogether is connected to first switch (RF1) or second switch (RF2) to form different communication paths.
The mobile terminal of the receiving sensitivity of the control TDD system, wherein be additionally provided with antenna on the pcb board
And the first radio-frequency antenna switch connecting with the antenna, first radio-frequency antenna switch are connect with the filters in series.
The mobile terminal of the receiving sensitivity of the control TDD system, wherein when tdd systems, which are in, to be received
When gap state, common end (RFC) switching that baseband signal controls the second RF bidirectional switch (301) is connected to described first
(RF1) is switched to form downlink reception access.
The mobile terminal of the receiving sensitivity of the control TDD system, wherein when tdd systems are in transmitting
When gap state, common end (RFC) switching that baseband signal controls the second RF bidirectional switch (301) is connected to described second
(RF2) is switched to form uplink transmitting path.
The mobile terminal of the receiving sensitivity of the control TDD system, wherein when the conducting of downlink receiving path, institute
State the downlink signal that antenna receives, successively the selection Jing Guo first radio-frequency antenna switch, the filter filtering with it is excellent
Be input to the power amplifier device after change processing and amplify processing, then export to the downlink low-noise amplifier with into
Row noise reduction optimization processing, output is to the R-T unit after compensating the certain transmission consume of the downlink signal, to enhance base
It stands and receives the sensitivity of the downlink signal.
The mobile terminal of the receiving sensitivity of the control TDD system, wherein when the conducting of uplink receiving access, base
It stands and sends uplink signal to the R-T unit, exported by the output end (TX) of the R-T unit, successively pass through the function
Rate amplifying device enhanced processing, the filter filtering and optimization processing after the selection through first radio-frequency antenna switch,
Launched by the antenna.
The mobile terminal of the receiving sensitivity of the control TDD system, wherein the downlink low-noise amplifier is
1 grade of low-noise amplifier, noise coefficient 0.8dB.
The mobile terminal of the receiving sensitivity of the control TDD system, wherein filled by the downlink low noise amplification
The noise reduction process set reduces the noise coefficient of the entire downlink reception access, to compensate the downlink signal along PCB trace institute
The value of increased signal transmission consume is 2dB.
The mobile terminal of the receiving sensitivity of the control TDD system, wherein the power amplifier device is radio frequency increasing
Beneficial amplifier or radio-frequency power amplifier.
A kind of tdd systems are also provided, the mobile end of the receiving sensitivity including control TDD system described above
End and base station, the base station and the mobile terminal are communicated by being connected to the network, and by the uplink and downlink signals of base station according to
The time slot state control of the tdd systems is connected different communication paths and is transmitted.
Compared to the prior art, a kind of mobile terminal of receiving sensitivity controlling TDD system provided by the invention is timely
Division duplex system has the advantages that
1. being put by increasing by 1 grade of downlink low noise in the receiving path between the power amplifier device and the R-T unit
Big device, it is double to reduce the entire time-division with this to compensate transmission consume of the downlink signal caused by PCB trace in receiving path
The noise coefficient of work system receiving path improves user experience to promote the sensitivity of TDD system.
2. the increased downlink low-noise amplifier has, at low cost, performance is excellent, high reliablity and noise reduction and amplification
The characteristics of effect.
3. the scheme that the present invention designs, structure is simple, and link differential loss is optimal, realizes most in the design of noise-reduction coefficient
Short design path, design cost is low, is easier to promote.
Detailed description of the invention
Fig. 1 is the structure chart of the mobile terminal of the receiving sensitivity of present invention control TDD system.
Fig. 2 is the functional schematic block diagram of tdd systems of the invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, right as follows in conjunction with drawings and embodiments
The present invention is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and do not have to
It is of the invention in limiting.
Embodiment one
Referring to Figure 1, Fig. 1 is the structure chart of the mobile terminal of the receiving sensitivity of control TDD system provided by the invention.Such as figure
Shown in 1, the mobile terminal 10 of the receiving sensitivity of the control TDD system, including terminal body, the mobile terminal sheet
It is provided with pcb board in body, R-T unit 1, downlink low-noise amplifier 2, power amplifier device are provided on the pcb board
3 and filter 4, the R-T unit 1, downlink low-noise amplifier 2, power amplifier device 3 and filter 4 successively go here and there
Connection connection.
As shown in Figure 1, the power amplifier device 3 is built-in with the second RF bidirectional switch (301), the second RF bidirectional is opened
Closing (301) may make the reception of the 3 complete independently TDD system of power amplifier device and transmission time slot to control work.Namely
It says, mobile terminal provided by the present invention is the operating mode using time division duplex, distinguishes uplink also by time slot state
It is downlink.
Specifically, the second RF bidirectional switch (301) includes common end (RFC), first switch (RF1) and second
It switchs (RF2), the common end (RFC) connect with the filter 4, the first switch (RF1) and the downlink low noise
The input terminal of amplifying device 2 connects, the receiving end of the output end of the downlink low-noise amplifier 2 and the R-T unit 1
(RX) it connects, the second switch (RF2) connect with the transmitting terminal (TX) of the R-T unit.It can be seen from Fig. 1 that only described
A downlink low noise is increased in receiving path (i.e. downlink) between R-T unit 1 and the power amplifier device 3
Amplifying device 2, the downlink low-noise amplifier 2 are connected in series with the R-T unit 1, the power amplifier device 3.
Preferably, the power amplifier device 3 is rf gain amplifier or radio-frequency power amplifier.
Preferably, the downlink low-noise amplifier 2 is 1 grade of low-noise amplifier, noise coefficient 0.8dB.
According to noise factor cascading equations and limiting snesibility calculation formula, it is known that entire tdd systems noise system
Number (i.e. insertion loss) is determined by the consume of the front end receiver access of power amplifier device 3, and ignores power amplifier device 3
Insertion consume and the consume of rear end receiving path, as the insertion loss of the insertion loss of filter, the filter refers to
It is inserted into the front and back power ratio of circuit.In embodiments of the present invention, the filter can be regarded as passive network, then it is inserted into
Loss is its noise coefficient.
In the embodiment of the present invention, the reason of downlink low-noise amplifier 2 is only with 1 grade of low-noise amplifier
It is as follows:
Noise coefficient (Noise figure, NF) cascading equations are as follows:
NF0=NF1 + (NF2-1)/G1 + (NF3-1)/G1G2 + …. (NFn-1)/G1*…Gn-1 (1)
That is noise coefficient NF=every level-one low-noise amplifier input terminal signal-to-noise ratio/output end signal-to-noise ratio, wherein NF0Table
Show that the overall noise of TDD system receiving path, n indicate that n-th grade of noise, G indicate the gain of power amplifier, then the level of every level-one
Gain is indicated with Gn.
By (1) it is found that the NF(noise coefficient of the first order) play key, downlink low noise amplification dress to whole system
2 are set when working using multiple amplifier tubes, cascade noise depends on noise and the gain of the first order, because after the third level
Influence very little, total noise be the first order noise plus the noise of the second level subtract one divided by the first order the sum of gain,
Therefore, increased downlink low-noise amplifier is the first order on the access at the end RX of R-T unit 1, and since the downlink is low
Noise amplifying unit has lesser NF(noise coefficient), therefore, can effectively reduce the NF(noise coefficient of whole system), compensation
Increased loss (transmission loss) caused by the longer PCB trace in rear end, to effectively promote the mobile end in TDD receiving path
Hold level of sensitivity, value 2dB.
Further, as shown in Figure 1, be additionally provided with antenna 6 on the pcb board and connect with the antenna 6 first penetrates
Frequency duplexer 5, first radio-frequency antenna switch 5 are connected in series with the filter 4.
The mobile terminal is also built-in with base band 7, and the base band 7 carries out signal transmission, the base with the R-T unit 1
Baseband signal with 7 is for distinguishing uplink and downlink, and when for uplink, transmission is uplink signal, when for
When downlink, received is downlink signal.
Working principle: baseband signal controls second RF bidirectional according to the time slot state of tdd systems and switchs
(301) common end (RFC) switching is connected to first switch (RF1) or second switch (RF2) to form different communication paths.
Specifically, 1) when tdd systems, which are in, receives time slot state, it is double that 7 signal of base band controls second radio frequency
The first switch (RF1) is connected to the switching of the common end (RFC) of switch (301) to form downlink reception access.I.e. such as Fig. 1
Shown, when the conducting of downlink receiving path, the downlink signal that the antenna 6 receives successively passes through first radio-frequency antenna
The power amplifier device 3, which is input to, after the selection of switch 5, the filtering of the filter 4 and optimization processing amplifies processing, then
Output, to carry out noise reduction optimization processing, compensates the certain transmission consumption of the downlink signal to the downlink low-noise amplifier 2
Output is to the R-T unit 1 after damage, to enhance the sensitivity that base band 7 receives the downlink signal.It is low by the downlink
The noise reduction process of noise amplifying unit 2 reduces the noise coefficient of the entire downlink reception access, to compensate the downlink signal
The increased signal transmission consume of the too long institute of cabling on pcb board
2) when tdd systems are in transmission time slot state, 7 signal of base band controls the second RF bidirectional switch (301)
Common end (RFC) switching be connected to the second switch (RF2) to form uplink transmitting path.I.e. when uplink receiving access is led
When logical, base band sends uplink signal to the R-T unit 1, is exported by the output end (TX) of the R-T unit 1, is successively passed through
Cross 3 enhanced processing of power amplifier device, the filter 4 filtering and optimization processing after opened through first radio-frequency antenna
The selection for closing 5, is launched by the antenna 6.
Therefore, the present invention utilizes the operating mode of TDD time division duplex, is receiving in time slot by increasing by 1 grade of downlink low noise
Sound amplifying device effectively reduces the NF (noise coefficient) of reception system, compensates for PCB using its noise reduction and the effect of amplification
The too long caused transmission loss of cabling on plate, improves the level of sensitivity of mobile terminal, more promotion user is in remote districts
Mobile terminal for example mobile phone application experience.
Embodiment two
The present invention also provides a kind of tdd systems, as shown in Fig. 2, the system comprises control TDD systems described above
Receiving sensitivity mobile terminal 10 and the base station 20 that is connect with the mobile terminal 10 by antenna, the base station 20 with
The mobile terminal 10 is communicated by network mode, the network mode include bluetooth connection, wireless network connection or its
He is able to carry out the connection type of network connection communication.Pass through the time slot shape by 20 signal of base station according to the tdd systems
State (i.e. reception time slot state or transmission time slot state) control is connected different communication paths and is transmitted, specific such as above-mentioned movement
Described in the working principle of terminal 10.
In conclusion the invention discloses the mobile terminals and time division duplex of a kind of receiving sensitivity for controlling TDD system
System, the mobile terminal method include: pcb board to be provided in the terminal body, described including terminal body
R-T unit, downlink low-noise amplifier, power amplifier device and filter, the power amplification are provided on pcb board
Device includes the second RF bidirectional switch (301), and second RF bidirectional switch (301) includes common end (RFC), first opens
(RF1) and second switch (RF2), the common end (RFC) is closed to connect with the filter, the first switch (RF1) and
The input terminal of the downlink low-noise amplifier connects, and the output end of the downlink low-noise amplifier and the transmitting-receiving fill
Receiving end (RX) connection set, the second switch (RF2) connect with the transmitting terminal (TX) of the R-T unit, baseband signal root
It is connected to according to common end (RFC) switching that the time slot state of tdd systems controls the second RF bidirectional switch (301)
First switch (RF1) or second switch (RF2) are to form different communication paths.The present invention passes through in the power amplifier device
Increase by 1 grade of downlink low-noise amplifier in receiving path between the R-T unit, to compensate downlink in receiving path
Transmission consume of the signal caused by PCB trace, the noise coefficient of entire tdd systems receiving path is reduced with this, from
And the sensitivity of TDD system is promoted, improve user experience.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (10)
1. a kind of mobile terminal for the receiving sensitivity for controlling TDD system, which is characterized in that described including terminal body
It is provided with pcb board in terminal body, R-T unit, downlink low-noise amplifier, power are provided on the pcb board
Amplifying device and filter, the power amplifier device include the second RF bidirectional switch (301), second RF bidirectional
Switch (301) includes common end (RFC), first switch (RF1) and second switch (RF2), the common end (RFC) with it is described
Filter connection, the first switch (RF1) connect with the input terminal of the downlink low-noise amplifier, the downlink low noise
The output end of sound amplifying device is connect with the receiving end (RX) of the R-T unit, the second switch (RF2) and the transmitting-receiving
The transmitting terminal (TX) of device connects, and baseband signal controls second RF bidirectional according to the time slot state of tdd systems and opens
Common end (RFC) switching for closing (301) is connected to first switch (RF1) or second switch (RF2) to form different communication and lead to
Road.
2. the mobile terminal of the receiving sensitivity of control TDD system according to claim 1, which is characterized in that the PCB
The first radio-frequency antenna switch for being additionally provided with antenna on plate and being connect with the antenna, first radio-frequency antenna switch with it is described
Filters in series connection.
3. the mobile terminal of the receiving sensitivity of control TDD system according to claim 2, which is characterized in that work as the time-division
When duplex system is in reception time slot state, baseband signal controls the common end (RFC) of the second RF bidirectional switch (301)
Switching is connected to the first switch (RF1) to form downlink reception access.
4. the mobile terminal of the receiving sensitivity of control TDD system according to claim 2, which is characterized in that work as the time-division
When duplex system is in transmission time slot state, baseband signal controls the common end (RFC) of the second RF bidirectional switch (301)
Switching is connected to the second switch (RF2) to form uplink transmitting path.
5. the mobile terminal of the receiving sensitivity of control TDD system according to claim 3, which is characterized in that work as downlink
When receiving path is connected, the downlink signal that the antenna receives, the successively selection Jing Guo first radio-frequency antenna switch, institute
It states and is input to the power amplifier device after filter filtering and optimization processing and amplifies processing, then export low to the downlink
Noise amplifying unit is exported after compensating the certain transmission consume of the downlink signal to the transmitting-receiving with carrying out noise reduction optimization processing
Device, to enhance the sensitivity of downlink signal described in Baseband Receiver.
6. the mobile terminal of the receiving sensitivity of control TDD system according to claim 4, which is characterized in that work as uplink
When receiving path is connected, base band transmission uplink signal is defeated by the output end (TX) of the R-T unit to the R-T unit
Out, successively by the power amplifier device enhanced processing, the filter filtering and optimization processing after penetrate through described first
The selection of frequency duplexer is launched by the antenna.
7. the mobile terminal of the receiving sensitivity of control TDD system according to claim 5, which is characterized in that under described
Row low-noise amplifier is 1 grade of low-noise amplifier, noise coefficient 0.8dB.
8. the mobile terminal of the receiving sensitivity of control TDD system according to claim 7, which is characterized in that pass through institute
The noise reduction process of downlink low-noise amplifier is stated, the noise coefficient of the entire downlink reception access is reduced, described in compensation
Downlink signal along PCB trace the value of increased signal transmission consume be 2dB.
9. the mobile terminal of the receiving sensitivity of control TDD system according to claim 1, which is characterized in that the function
Rate amplifying device is rf gain amplifier or radio-frequency power amplifier.
10. a kind of tdd systems, the receiving sensitivity including the described in any item control TDD systems of such as claim 1-9
Mobile terminal and base station, the base station and the mobile terminal is communicated by network connection, and by base station signal according to
The time slot state control of the tdd systems is connected different communication paths and is transmitted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811129276.4A CN109150229B (en) | 2018-09-27 | 2018-09-27 | Mobile terminal and time division duplex system for controlling receiving sensitivity of TDD system |
| PCT/CN2019/107663 WO2020063612A1 (en) | 2018-09-27 | 2019-09-25 | Mobile terminal and time division duplex system for controlling receiving sensitivity of tdd system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811129276.4A CN109150229B (en) | 2018-09-27 | 2018-09-27 | Mobile terminal and time division duplex system for controlling receiving sensitivity of TDD system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109150229A true CN109150229A (en) | 2019-01-04 |
| CN109150229B CN109150229B (en) | 2021-07-13 |
Family
ID=64812598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811129276.4A Active CN109150229B (en) | 2018-09-27 | 2018-09-27 | Mobile terminal and time division duplex system for controlling receiving sensitivity of TDD system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109150229B (en) |
| WO (1) | WO2020063612A1 (en) |
Cited By (4)
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| WO2020063612A1 (en) * | 2018-09-27 | 2020-04-02 | 惠州Tcl移动通信有限公司 | Mobile terminal and time division duplex system for controlling receiving sensitivity of tdd system |
| CN110971266A (en) * | 2019-12-04 | 2020-04-07 | 惠州Tcl移动通信有限公司 | WIFI sensitivity enhancing device and electronic equipment |
| CN111465040A (en) * | 2020-04-21 | 2020-07-28 | 惠州Tcl移动通信有限公司 | Method for optimizing driving of time division duplex system |
| CN117615459A (en) * | 2024-01-22 | 2024-02-27 | 南京典格通信科技有限公司 | Dynamic TDD switch switching method based on 5G ad hoc network system |
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| JP2002171194A (en) * | 2000-11-30 | 2002-06-14 | Matsushita Electric Ind Co Ltd | Radio equipment, base radio station equipped therewith, portable information terminal and radio communication system incorpolating them |
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| WO2020063612A1 (en) * | 2018-09-27 | 2020-04-02 | 惠州Tcl移动通信有限公司 | Mobile terminal and time division duplex system for controlling receiving sensitivity of tdd system |
| CN110971266A (en) * | 2019-12-04 | 2020-04-07 | 惠州Tcl移动通信有限公司 | WIFI sensitivity enhancing device and electronic equipment |
| CN111465040A (en) * | 2020-04-21 | 2020-07-28 | 惠州Tcl移动通信有限公司 | Method for optimizing driving of time division duplex system |
| CN117615459A (en) * | 2024-01-22 | 2024-02-27 | 南京典格通信科技有限公司 | Dynamic TDD switch switching method based on 5G ad hoc network system |
| CN117615459B (en) * | 2024-01-22 | 2024-04-16 | 南京典格通信科技有限公司 | Dynamic TDD switch switching method based on 5G ad hoc network system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020063612A1 (en) | 2020-04-02 |
| CN109150229B (en) | 2021-07-13 |
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