CN104980205A - Transmitter diversity circuit and mobile terminal - Google Patents
Transmitter diversity circuit and mobile terminal Download PDFInfo
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- CN104980205A CN104980205A CN201410140531.0A CN201410140531A CN104980205A CN 104980205 A CN104980205 A CN 104980205A CN 201410140531 A CN201410140531 A CN 201410140531A CN 104980205 A CN104980205 A CN 104980205A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a transmitter diversity circuit and a mobile terminal. The transmitter diversity circuit is used in the design of a mobile terminal antenna circuit. The transmitter diversity circuit comprises a first antenna, a second antenna, a main antenna branch, an auxiliary antenna branch; a conducting circuit of which one end is connected with the first antenna and the second antenna, while the other end is connected with the main antenna branch and the auxiliary antenna branch, and which has a first state and a second state, a control unit for controlling the conducting circuit to switch between the first state and the second state according to a preset control strategy, wherein the first antenna and the second antenna are connected with the main antenna branch and the auxiliary antenna branch via the conducting circuit under the first state respectively; the first antenna and the second antenna are connected with the auxiliary antenna branch and the main antenna branch via the conducting circuit under the second state respectively. The transmitter diversity circuit of the invention could detect signal strengths of the two antennas in real time via the terminal, and use the antenna with a relative good electric field position as a transmitting antenna, thereby strengthening data transmission capacity of an up link of a communication terminal and simultaneously reducing power consumption of terminal equipment.
Description
Technical field
The present invention relates to moving communicating field, more specifically, relate to a kind of transmitting diversity circuit and mobile terminal.Background technology
In prior art, transmitting branch, main receiving branch and diversity reception diversity circuit are mainly comprised to the mobile terminal circuit under FDD (Frequency Division Duplexing) mode of operation, wherein transmitting branch and main receiving branch synthesize a HW highway by duplexer, are connected to main road antenna.Diversity reception branch road is a relatively independent circuit, is connected to diversity antenna.
The physical significance of diversity reception comprises, and makes receiving terminal can obtain multiple statistical iteration, carries the fading signal of same information, and the fading signal of the multiple statistical iteration received is carried out merging treatment, to reduce spatial fading impact to received signal.
When hardware designs, in order to improve the isolation between major-minor antenna, have strict demand to the minimum range between major-minor antenna and direction, major-minor antenna can design the two ends in terminal in general, and isolation is each other accomplished maximum.
Fig. 1 is traditional circuit design.
When communicating terminal works, due to power closed-loop control requirement, when terminal detects the signal weaker that it receives, be ensure communication link balance, terminal can improve the transmitting power of transmitter, to ensure the balance of communication link.In actual applications, the position residing in the electric field of base station due to major-minor antenna is different, and the signal power that two antennas receive can be different.
The position view of Fig. 2 terminal antenna in the electric field of base station.
In some cases, the signal that antenna 1 receives can be better than the signal received by antenna 2, and antenna 1 is in disadvantageous position relative to antenna 2 in the electric field of base station.At this moment, terminal, when using antenna 1 transmit ascending data, can reduce the exponent number of Data Modulation, cause the upstream rate of terminal to reduce, and simultaneously according to power closed loop control mechanism, terminal can promote its transmitting power, and power consumption of terminal can be caused like this to increase.
Therefore, the problem that the upstream rate that there is the terminal caused because antenna is in disadvantageous position in the electric field of base station in prior art reduces.
Summary of the invention
The invention provides a kind of transmitting diversity circuit and mobile terminal, the problem that the upstream rate for solving the terminal caused because antenna is in disadvantageous position in the electric field of base station existed in prior art reduces.
For achieving the above object, according to an aspect of the present invention, provide a kind of transmitting diversity circuit, and adopt following technical scheme:
Transmitting diversity circuit comprises: the first antenna; Second antenna; Main antenna branch road; Auxiliary antenna branch; One end is connected with described second antenna with described first antenna, the turning circuit that the other end is connected with described auxiliary antenna branch with described main antenna branch road, has the first state and the second state; Control unit, switches between a first state and a second state for controlling described turning circuit according to predetermined control strategy; Wherein, under described first state, described first antenna is connected with described main antenna branch road and described auxiliary antenna branch by described turning circuit respectively with described second antenna, under described second state, described first antenna is connected with described auxiliary antenna branch and described main antenna branch road by described turning circuit respectively with described second antenna.
Further, described main antenna branch road comprises: the transmitting branch connecting terminal radio frequency chip; Connect the main receiving branch of described terminal radio frequency chip; For the duplexer described transmitting branch and described main receiving branch merged, described duplexer connects described turning circuit.
Further, described auxiliary antenna branch is diversity reception branch road.
Further, described control unit also for: the radio frequency signal that the radio frequency signal received described first antenna by terminal and described second antenna are received carries out demodulation, the first signal strength signal intensity that described first antenna drawn receives and the secondary signal intensity that described second antenna receives; Obtain described first signal strength signal intensity and described secondary signal intensity, and described first signal strength signal intensity and described secondary signal intensity are carried out real-time comparison.
Further, described predetermined control strategy comprises: the value that described first signal strength signal intensity is greater than described secondary signal intensity exceed predetermined threshold value reach preset duration time, control described first antenna and the conducting of described main antenna branch road, described second antenna and described auxiliary antenna branch conducting; The value that described secondary signal intensity is greater than described first signal strength signal intensity exceed described predetermined threshold value reach described preset duration time, control described second antenna and the conducting of described main antenna branch road, described first antenna and described auxiliary antenna branch conducting.
Further, described predetermined threshold value is 1dB.
Further, described preset duration is 1 second.
Further, described turning circuit is double-pole double-throw switch.
Further, described control unit is a baseband chip.
According to another aspect of the present invention, provide a kind of mobile terminal, and adopt following technical scheme:
Mobile terminal comprises above-mentioned transmitting diversity circuit.
The embodiment of the present invention detects the signal strength signal intensity of two antennas in real time by terminal, all the time using good for electric field location antenna as transmitting antenna, and limit for the thresholding of switching over, decrease the invalid switching times of switch, strengthen the ability of switch by external interference.The upstream rate of effective raising terminal, and the transmitting power suitably reducing the power amplifier of terminal, reduce the power consumption of complete machine, for the cruising time having the end product of battery then effectively can extend battery.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 represents the structural representation of the legacy transmission diversity circuit described in background technology of the present invention;
Fig. 2 represents the position view of terminal antenna in the electric field of base station described in background technology of the present invention;
Fig. 3 represents the structural representation of the transmitting diversity circuit described in the embodiment of the present invention one;
Fig. 4 represents example one flow chart of the predetermined control strategy described in the embodiment of the present invention one;
Fig. 5 represents example two flow chart of the predetermined control strategy described in the embodiment of the present invention one;
Fig. 6 represents example three flow chart of the predetermined control strategy described in the embodiment of the present invention one;
Fig. 7 represents the structural representation of the transmitting diversity circuit described in the embodiment of the present invention two.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
Embodiment one
Fig. 3 represents the structural representation of the transmitting diversity circuit described in the embodiment of the present invention one.
Shown in Figure 3, transmitting diversity circuit comprises: the first antenna 10, second antenna 20, main antenna branch road 4, auxiliary antenna branch 5 and turning circuit 3, turning circuit 3 connects described first antenna 10 and described second antenna 20 respectively, and turning circuit 3 has the first state and the second state; Control unit 6, switches between a first state and a second state for controlling described turning circuit 3 according to predetermined control strategy; Wherein, under described first state, described first antenna 10 is connected with described main antenna branch road 4 and described auxiliary antenna branch 5 by described turning circuit 3 respectively with described second antenna 20, under described second state, described first antenna 10 is connected with described auxiliary antenna branch 4 and described main antenna branch road 5 by described turning circuit 3 respectively with described second antenna 20.
In the technique scheme of the present embodiment, need two equivalent or performance is close antennas in transmitting diversity circuit, i.e. the first antenna 10 and the second antenna 20.Main antenna branch road 4 i.e. main receiving branch, auxiliary antenna branch 5 i.e. diversity reception branch road, turning circuit 3 according to the predetermined control strategy of control unit 6, make the first antenna 10 can with main antenna branch road 4 conducting, also can with the conducting of auxiliary antenna branch 5; Equally, second antenna 20 also can switch between main antenna branch road 4 and auxiliary antenna branch 5, the effect reached like this is exactly in actual applications, the position residing in the electric field of base station due to major-minor antenna is different, the signal power that two antennas receive can be different, in some cases, the signal that the first antenna 10 receives can be better than the signal received by the second antenna 20, and the first antenna 10 is in disadvantageous position relative to the second antenna 20 in the electric field of base station.So just cause terminal when use first antenna 10 transmit ascending data, can reduce the exponent number of Data Modulation, cause the upstream rate of terminal to reduce, simultaneously according to power closed loop control mechanism, terminal can promote its transmitting power, and power consumption of terminal can be caused like this to increase.And by the technique scheme of the present embodiment, when there is above-mentioned situation, control unit 6 controls turning circuit 3 according to predetermined control strategy, makes the first antenna 10 and described second antenna 20 switched conductive respectively and between described main antenna branch road 4 and described auxiliary antenna branch 5.
More specifically, above-mentioned predetermined control strategy, comprise: the value that described first signal strength signal intensity is greater than described secondary signal intensity exceed predetermined threshold value reach preset duration time, control described first antenna 10 and the conducting of main antenna branch road, described second antenna 20 and the conducting of described auxiliary antenna branch 5; The value that described secondary signal intensity is greater than described first signal strength signal intensity exceed described predetermined threshold value reach described preset duration time, control described second antenna 5 and the conducting of described main antenna branch road 4, described first antenna and the conducting of described auxiliary antenna branch 5.
Illustrate the course of work of transmitting diversity circuit of the present invention below, specifically set forth predetermined control strategy with this.
Example one: shown in Figure 4, the course of work of transmitting diversity circuit comprises:
Step 401: default transmit antenna is main antenna 1.
First, when power-up initializing, the antenna 1 in system default two antennas is transmitting antenna, and the upward signal utilizing antenna 1 to launch and wireless communication networks carry out alternately.
Step 402: process respectively the signal that two antennas receive, detects RSSI1 and RSSI2 signal.
After access network, the radio frequency signal that terminal receives for two antennas processes, and demodulates both signal strength signal intensity RSSI1 and RSSI2 respectively.
Step 403: the size of RSSI1 and RSSI2 is contrasted.
If RSSI1 is greater than RSSI2, illustrate that current transmitting antenna meets job requirement, diverter switch does not do action, returns and performs step 403; If RSSI2 is greater than RSSI1, illustrate that current transmitting antenna does not meet job requirement, need to carry out switching and perform step 404.
Step 404: control unit exports control command, switching over.
Step 405: transmitting antenna is switched to antenna 2.
Namely baseband chip sends switching command, and diverter switch makes switching action, and transmitting antenna is switched to antenna 2.For reducing unnecessary switching, needing to ensure that RSSI2 is greater than RSSI11dB, and keeping 1 seconds, the invalid switching times of switch can be reduced like this, and the misoperation because extraneous bursty interference causes can be reduced.
Step 406: the size of RSSI1 and RSSI2 is contrasted.
Along with terminal change in location in the wireless network, from certain position, terminal detects that RSSI1 is greater than RSSI2, illustrates that current transmitting antenna does not meet job requirement, needs to switch.
Step 407: control unit exports control command, switching over.
Step 408: launch and be switched to antenna 1 all over the world.
Then baseband chip sends switching command, and diverter switch makes switching action, and transmitting antenna is switched to antenna 1.For reducing unnecessary switching, needing to ensure that RSSI1 is greater than RSSI21dB, and keeping 1 seconds, the invalid switching times of switch can be reduced like this, and the misoperation because extraneous bursty interference causes can be reduced.
Example two: shown in Figure 5, the course of work of transmitting diversity circuit comprises:
Step 501: default transmit antenna is main antenna 1.
First, when power-up initializing, the antenna 2 in system default two antennas is transmitting antennas, and the upward signal utilizing antenna 2 to launch and wireless communication networks carry out alternately.
Step 502: process respectively the signal that two antennas receive, detects RSSI1 and RSSI2 signal.
After access network, the radio frequency signal that terminal receives for two antennas processes, and demodulates both signal strength signal intensity RSSI1 and RSSI2 respectively.
Step 503: the size of RSSI1 and RSSI2 is contrasted.
If RSSI1 is greater than RSSI2, illustrate that current transmitting antenna does not meet job requirement, need to switch.
Step 504: control unit exports control command, switching over.
Step 505: transmitting antenna is switched to antenna 2.
Namely baseband chip sends switching command, and diverter switch makes switching action, and transmitting antenna is switched to antenna 1.For reducing unnecessary switching, needing to ensure that RSSI1 is greater than RSSI21dB, and keeping 1 seconds, the invalid switching times of switch can be reduced like this, and the misoperation because extraneous bursty interference causes can be reduced.
Step 506: the size of RSSI1 and RSSI2 is contrasted.
When RSSI2 is greater than RSSI1, returns and perform step 506.RSSI1 is greater than RSSI21d B and keeps 1 second time, performs step 507.
Step 507: control unit exports control command, switching over.
Step 508: transmitting antenna is switched to antenna 1.
Along with terminal change in location in the wireless network, from certain position, terminal detects that RSSI2 is greater than RSSI1, illustrate that current transmitting antenna does not meet job requirement, need to switch, then baseband chip sends switching command, and diverter switch makes switching action, and transmitting antenna is switched to antenna 2.For reducing unnecessary switching, needing to ensure that RSSI2 is greater than RSSI11dB, and keeping 1 seconds, the invalid switching times of switch can be reduced like this, and the misoperation because extraneous bursty interference causes can be reduced.
Example three: shown in Figure 6, the course of work of transmitting diversity circuit comprises:
Step 601: initial state two antennas receive only the downstream signal of base station.
Step 602: the signal that two antennas receive is processed respectively, detects RSSI1 and RSSI2.
First, when power-up initializing, system only receives the downstream signal of base station, and do not transmit output, and the radio frequency signal that terminal receives for two antennas processes, and demodulates both signal strength signal intensity RSSI1 and RSSI2 respectively.
Step 603: the size of RSSI1 and RSSI2 is contrasted.
If RSSI1 is greater than RSSI2, illustrate that current transmitting antenna 1 meets job requirement, just use antenna 1 conduct, return and perform step 603.
Along with terminal change in location in the wireless network, from certain position, terminal detects that RSSI2 is greater than RSSI1, illustrates that current transmitting antenna does not meet job requirement, needs to switch, and performs step 604.
Step 604: control unit exports control command, switching over.
Step 605: transmitting antenna is switched to antenna 1.
Namely baseband chip sends switching command, and diverter switch makes switching action, and transmitting antenna is switched to antenna 2.For reducing unnecessary switching, needing to ensure that RSSI2 is greater than RSSI11dB, and keeping 1 seconds, the invalid switching times of switch can be reduced like this, and the misoperation because extraneous bursty interference causes can be reduced.
Step 606: the size of RSSI2 and RSSI1 is compared.
Terminal detects that RSSI1 is greater than RSSI2, illustrates that current transmitting antenna does not meet job requirement, needs to switch, and performs step 607.
Step 607: control unit exports control command, switching over.
Step 608: transmitting antenna is switched to antenna 2.
Namely baseband chip sends switching command, and diverter switch makes switching action, and transmitting antenna is switched to antenna 2.For reducing unnecessary switching, needing to ensure that RSSI1 is greater than RSSI21dB, and keeping 1 seconds, the invalid switching times of switch can be reduced like this, and the misoperation because extraneous bursty interference causes can be reduced.
Above-described embodiment detects the signal strength signal intensity of two antennas in real time by terminal, all the time using good for electric field location antenna as transmitting antenna, and limit for the thresholding of switching over, decrease the invalid switching times of switch, strengthen the ability of switch by external interference.The upstream rate of effective raising terminal, and the transmitting power suitably reducing the power amplifier of terminal, reduce the power consumption of complete machine, for the cruising time having the end product of battery then effectively can extend battery.
Embodiment two
Fig. 7 represents the structural representation of the transmitting diversity circuit described in the embodiment of the present invention two.
Shown in Figure 7, transmitting diversity circuit comprises: the antenna that equivalent or performance is close, antenna 1 and antenna 2, transmitting branch PA, for the signal that emitting radio frequency signal exports; Main receiving branch LNA, for the main road Received signal strength that reception antenna receives; The duplexer of transmitting and receiving, becomes a road HW highway for transmitting branch and main receiving branch are merged; Diversity reception branch road, i.e. bypass LNA, for the diversity reception signal that reception antenna receives; The dpdt double-pole double-throw (DPDT) DPDT switch of one X-type, i.e. turning circuit 3, for switching the connection of transmitting path and antenna 1 and antenna 2; Baseband chip in circuit, namely above-mentioned control unit 4, for controlling the switching action of the dpdt double-pole double-throw (DPDT) DPDT switch of X-type.
Recall at communicating terminal radio frequency chip Interior Solutions the signal strength signal intensity RSSI1 and RSSI2 that antenna 1 and antenna 2 receive, and by an algorithm of baseband chip in house software, both signal strength signal intensities are contrasted, judges the antenna that received signal strength is stronger.
By control logic algorithm, export the switching command of the dpdt double-pole double-throw (DPDT) DPDT switch controlling X-type, ensure that transmission channel can be switched on the good antenna of received signal strength.
The mobile terminal that the embodiment of the present invention provides, and adopt following technical scheme:
Mobile terminal comprises above-mentioned transmitting diversity circuit.
The present invention detects the signal strength signal intensity of two antennas in real time by terminal, all the time using good for electric field location antenna as transmitting antenna, and to limit for the thresholding of switching over, decrease the invalid switching times of switch, strengthen the ability of switch by external interference.The upstream rate of effective raising terminal, and the transmitting power suitably reducing the power amplifier of terminal, reduce the power consumption of complete machine, for the cruising time having the end product of battery then effectively can extend battery.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the prerequisite not departing from principle of the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. a transmitting diversity circuit, is characterized in that, comprising:
First antenna;
Second antenna;
Main antenna branch road;
Auxiliary antenna branch;
One end is connected with described second antenna with described first antenna, the turning circuit that the other end is connected with described auxiliary antenna branch with described main antenna branch road, has the first state and the second state;
Control unit, switches between described first state and described second state for controlling described turning circuit according to predetermined control strategy;
Wherein, under described first state, described first antenna is connected with described main antenna branch road and described auxiliary antenna branch by described turning circuit respectively with the second antenna, under described second state, described first antenna is connected with described auxiliary antenna branch and described main antenna branch road by described turning circuit respectively with described second antenna.
2. transmitting diversity circuit as claimed in claim 1, it is characterized in that, described main antenna branch road comprises:
Connect the transmitting branch of terminal radio frequency chip;
Connect the main receiving branch of described terminal radio frequency chip;
For the duplexer described transmitting branch and described main receiving branch merged, described duplexer connects described turning circuit.
3. transmitting diversity circuit as claimed in claim 2, it is characterized in that, described auxiliary antenna branch is diversity reception branch road.
4. transmitting diversity circuit as claimed in claim 1, is characterized in that, described control unit also for:
Obtain the secondary signal intensity that the first signal strength signal intensity corresponding to described first antenna is corresponding with described second antenna, and described first signal strength signal intensity and described secondary signal intensity are carried out real-time comparison.
5. transmitting diversity circuit as claimed in claim 4, it is characterized in that, described predetermined control strategy comprises:
The value that described first signal strength signal intensity is greater than described secondary signal intensity exceed predetermined threshold value reach preset duration time, control described first antenna and the conducting of described main antenna branch road and described second antenna and described auxiliary antenna branch conducting;
The value that described secondary signal intensity is greater than described first signal strength signal intensity exceed described predetermined threshold value reach described preset duration time, control described second antenna and the conducting of described main antenna branch road and described first antenna and described auxiliary antenna branch conducting.
6. transmitting diversity circuit as claimed in claim 5, it is characterized in that, described predetermined threshold value is 1dB.
7. the transmitting diversity circuit as described in claim 5 or 6, is characterized in that, described preset duration is 1 second.
8. transmitting diversity circuit as claimed in claim 1, it is characterized in that, described turning circuit is double-pole double-throw switch.
9. transmitting diversity circuit as claimed in claim 8, it is characterized in that, described control unit is a baseband chip.
10. a mobile terminal, is characterized in that, comprises the transmitting diversity circuit described in any one of claim 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140531.0A CN104980205A (en) | 2014-04-09 | 2014-04-09 | Transmitter diversity circuit and mobile terminal |
| PCT/CN2014/084424 WO2015154358A1 (en) | 2014-04-09 | 2014-08-14 | Transmit diversity circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410140531.0A CN104980205A (en) | 2014-04-09 | 2014-04-09 | Transmitter diversity circuit and mobile terminal |
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| CN104980205A true CN104980205A (en) | 2015-10-14 |
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| CN201410140531.0A Pending CN104980205A (en) | 2014-04-09 | 2014-04-09 | Transmitter diversity circuit and mobile terminal |
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| CN (1) | CN104980205A (en) |
| WO (1) | WO2015154358A1 (en) |
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Application publication date: 20151014 |