CN104283595A - Transmitting diversity mode switch control method, device and circuit - Google Patents
Transmitting diversity mode switch control method, device and circuit Download PDFInfo
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- CN104283595A CN104283595A CN201310284595.3A CN201310284595A CN104283595A CN 104283595 A CN104283595 A CN 104283595A CN 201310284595 A CN201310284595 A CN 201310284595A CN 104283595 A CN104283595 A CN 104283595A
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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
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
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Abstract
The invention discloses a transmitting diversity mode switch control method, device and circuit which are suitable for a mobile terminal. The method includes the steps that no less than one transmitting diversity mode switch condition is preset, and all the transmitting diversity mode switch conditions are sorted; the transmitting diversity mode switch conditions are judged one by one according to the sequence of the transmitting diversity mode switch conditions, and if the conditions of a transmitting diversity mode are met, the multi-antenna transmitting diversity mode is adopted for the mobile terminal; if the conditions of a single antenna transmitting mode are met, the single antenna transmitting mode is adopted for the mobile terminal. By means of the technical scheme, one or more conditions in multiple conditions can be combined to conduct judgment, and flexible control over the mobile terminal under various complex scenes can be achieved, so that switching between the multi-antenna transmitting diversity mode and the single-antenna transmitting diversity mode can be achieved.
Description
Technical field
The present invention relates to technical field of mobile terminals, particularly relate to control method, device and circuit that a kind of diversity mode switches.
Background technology
The principal element affecting signal quality in wireless transmission environments is the decline of channel.For the system of 3G and 4G, its most important application is data service.And due to the up usual employing single antenna of mobile terminal, causing the fading capability of its antagonism wireless channel poor, upstream data rate is usually remarkable in downstream rate.If mobile terminal adopts multi-antenna transmit diversity method effectively can resist the decline of wireless channel, for system provides reliable information transmission, thus significantly improve uplink transmission rate.
But multi-antenna emission diversity technology uses many transmitting chains, compared with use single antenna, the power consumption of high frequency transmission circuit can enlarge markedly, and the power amplifier especially in transmitting chain needs larger power consumption.Current battery technology is still one of bottleneck of restriction mobile terminal development, and too much power consumption can cause the air time of mobile terminal, data download time and stand-by time to reduce.Due to battery technology restriction and not yet there is the method for feasible reduction transmit diversity power consumption, therefore, the transmit diversity techniques of mobile terminal not yet widely uses so far.
In current transmit diversity techniques scheme, mainly concentrate in the base station system.When base station detects that a certain road or a few roads transmitting chain exist fault, when cannot normally work, automatically switch to the method without transmit diversity.And for the transmit diversity of end side, current scheme, mainly according to the condition such as base station pilot power, transmitting power, translational speed that mobile terminal receives, carries out switching between transmit diversity and single-antenna transmission thus reducing power consumption.
When prior art exists fault for multiple transmitting chain Zhong mono-road, base station or a few road, automatically switch to non-transmission diversity pattern.And for mobile terminal, because it uses powered battery, cannot obtain stable power, transmit diversity techniques significantly can increase power consumption of mobile terminal.Therefore need under guarantee quality of service, when transmit diversity cannot bring enough gains, terminal switch can be made to non-multi-antenna emission diversity pattern, reach reduction power consumption, extend the object of terminal standby time, and it is relatively less how to control the handoff technique of multi-antenna emission diversity pattern for mobile terminal at present.
Simultaneously when mobile terminal is in some scene, the gain meeting step-down that transmit diversity brings, or transmit diversity techniques is opened and cannot be improved Consumer's Experience.And only propose Part Methods closedown transmit diversity in current technology, as reached the object reducing power consumption of terminal according to methods such as mobile terminal translational speed, mobile terminal emitting power, base station down pilot powers.But along with the communication pattern of mobile terminal support increase, complicated operative scenario, current method cannot be suitable for whole scene, cannot reach the object accurately controlling to carry out between mobile terminal multi-antenna diversity mode and single-antenna transmission pattern switching.
Summary of the invention
Mobile terminal employing multi-antenna emission diversity pattern or the technical problem of single-antenna transmission pattern cannot be controlled under complex scene to solve in prior art, the present invention proposes control method, device and the circuit that a kind of diversity mode switches, can by judging the one or more conditional combinations in multiple condition, can control flexibly under various complex scene mobile terminal, mobile terminal is switched between multi-antenna emission diversity pattern and single-antenna transmission pattern.
One aspect of the present invention provides the control method that a kind of diversity mode switches, and is applicable to mobile terminal, comprises the following steps:
Preset and be no less than a kind of diversity mode switching condition, and whole diversity mode switching condition is sorted;
Diversity mode switching condition is judged one by one according to the order of diversity mode switching condition, if meet the condition of diversity mode, then mobile terminal adopts multi-antenna emission diversity pattern, if meet the condition of single-antenna transmission pattern, then mobile terminal adopts single-antenna transmission pattern.
The present invention provides the control device that a kind of diversity mode switches on the other hand, is applicable to mobile terminal, comprises diversity mode switching judging circuit, control circuit, digital baseband circuit, analog baseband circuitry and RF radiating circuit, wherein,
Diversity mode switching judging circuit is no less than a kind of diversity mode switching condition for presetting, and whole diversity mode switching condition is sorted, judge diversity mode switching condition one by one according to the order of diversity mode switching condition, control signal is sent to control circuit;
Control circuit is used for according to control signal, opens or close digital baseband circuit, analog baseband circuitry and RF radiating circuit;
Digital baseband circuit is used for carrying out modulating-coding to digital signal, and carries out multichannel diversity, inputs to analog baseband circuitry;
Analog baseband circuitry is used for carrying out digital-to-analog conversion to signal, sends to RF radiating circuit;
RF radiating circuit is used for radio frequency signal and carries out up-conversion, amplification and filtering.
Present invention also offers a kind of diversity mode switching judging circuit, comprise memory cell, sequencing unit, judging unit and control signal generation unit, wherein,
Memory cell default is no less than a kind of diversity mode switching condition for storing;
Sequencing unit is used for whole diversity mode switching condition to sort;
Judging unit is used for judging diversity mode switching condition one by one according to the order of diversity mode switching condition;
Control signal for generating control signal, and is sent to control circuit by control signal generation unit.
Technical scheme of the present invention is the combination based on one or more Rule of judgment, judge whether to meet transmit diversity switching condition, by the part of functions circuit relevant to transmit diversity of control circuit temporary close radio frequency transmitter circuitry, analog baseband circuitry, digital baseband, the power consumption of mobile terminal effectively can be reduced.
Accompanying drawing explanation
Fig. 1 is the control flow chart that the diversity mode in the embodiment of the present invention one switches.
Fig. 2 is the control flow chart that the diversity mode in the embodiment of the present invention two switches.
Fig. 3 is the control flow chart that the diversity mode in the embodiment of the present invention three switches.
Fig. 4 is the structural representation of the diversity mode switching control in the embodiment of the present invention four.
Fig. 5 is the structural representation of the diversity mode switching judging circuit in the embodiment of the present invention five.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Technical scheme of the present invention judges based on to the combination of next condition or multiple condition, controls mobile terminal and switch between multi-antenna emission diversity pattern and single-antenna transmission pattern:
Condition one, judge that terminal needs the type of service of carrying out, when mobile terminal carries out speech business, close transmit diversity, adopt single-antenna transmission pattern, otherwise open transmit diversity, adopt multi-antenna emission diversity pattern.
Condition two, when the business of fixed rate is set up in mobile terminal and base station, close transmit diversity, adopt single-antenna transmission pattern, otherwise open transmit diversity, adopt multi-antenna emission diversity pattern.
Condition three, due to mobile terminal be in constantly mobile in and can plurality of communication systems be supported, when terminal is in system or cross-system switches, transmit diversity is opened during switching, adopt multi-antenna emission diversity pattern, thus guarantee handover success rate, after having switched, close transmit diversity, adopt single-antenna transmission pattern.
Condition four, when mobile terminal carries out data service, the size of the packet that need transmit arranges a threshold value.When data package size is lower than this threshold value, close transmit diversity, adopt single-antenna transmission pattern, when higher than this threshold value, open transmit diversity, adopt multi-antenna emission diversity pattern.
Condition five, can support plurality of communication systems due to mobile terminal, when mobile terminal carries out data service, the upstream peak speed of different communication systems is different.Under different communication systems, can arrange a threshold value, this threshold value is the ratio of the up peak rate of theory of mobile terminal speed and place communication system.When the ratio of mobile terminal upstream rate and the up peak rate of theory is lower than this threshold value, can transmit diversity be opened, adopt multi-antenna emission diversity pattern, during higher than this threshold value, close transmit diversity, adopt single-antenna transmission pattern.
Condition six, when the information that mobile terminal sends is control signal, close transmit diversity, adopt single-antenna transmission pattern, when the information that mobile terminal sends is user data, open transmit diversity, adopt multi-antenna emission diversity pattern.
Condition seven, a threshold value is arranged to the battery electric quantity of mobile terminal, when battery electric quantity is higher than this threshold value, open transmit diversity, adopt multi-antenna emission diversity pattern, when battery electric quantity is lower than this threshold value, close transmit diversity, adopt single-antenna transmission pattern.
Condition eight, mobile terminal, when battery is not limited, when powering as used external power source, adopt multi-antenna emission diversity pattern, improve terminal capabilities by using transmit diversity.
Condition nine, under employing multi-antenna emission diversity mode situation, when every road transmitting power is lower than predetermined threshold value, and when being no less than the transmitting chain power consumption of two-way transmitting chain power consumption higher than single antenna under present channel environment, close transmit diversity, adopt single-antenna transmission pattern.
Above condition can carry out combination in any in the specific implementation, in a conditional combination, arranges different condition orders as required, controls mobile terminal multi-antenna transmit diversity capability to reach.
Diversity mode switching condition is judged one by one according to the order of diversity mode switching condition, if meet the condition of diversity mode, then mobile terminal adopts multi-antenna emission diversity pattern, if meet the condition of single-antenna transmission pattern, then mobile terminal adopts single-antenna transmission pattern.
In addition, can also software interface be passed through, to mobile terminal input control signal, be selected to adopt multi-antenna emission diversity pattern or single-antenna transmission pattern by user oneself.
When mobile terminal is determined to adopt multi-antenna emission diversity pattern or single-antenna transmission pattern, controlled with transmit diversity interlock circuit in RF radiating circuit, analog baseband circuitry and digital baseband circuit by control circuit.
Enumerate three embodiments to be below illustrated.
Fig. 1 is the control flow chart that the diversity mode in the embodiment of the present invention one switches.As shown in Figure 1, this flow process comprises the following steps:
After step 101, mobile terminal work on power, close transmit diversity.When mobile terminal initiates business, start the judgement starting diversity mode switching.
Step 102, first decision condition are the type that mobile terminal initiates business.When mobile terminal initiates speech business, needed for speech business, channel width is less, and all plan according to mobile terminal single-antenna transmission during the network planning, therefore mobile terminal single-antenna transmission can meet voice quality requirement substantially, use multi-antenna emission diversity can not bring remarkable gain for speech business, therefore transmit diversity can be closed, use single-antenna transmission, but whether close transmit diversity, use single-antenna transmission, also need the judgement carrying out next condition, go to step 103; If not speech business, then go to step 106.
Step 103, can support plurality of communication systems due to mobile terminal, and mobile terminal can be in different mobile communication system, therefore, mobile terminal often can be in cross-system and to switch or in intra-system handover process simultaneously.Mobile terminal is in handoff procedure, due to reasons such as ascending power is limited, physical channel environment differences, terminal generation call drop likelihood ratio is high without probability during switching, therefore in order to reduce the indexs such as cutting off rate in handoff procedure, transmit diversity can be opened in handoff procedure, thus ensure uplink communication quality, after handoff procedure completes, close transmit diversity, use single-antenna transmission.Therefore this step judges whether mobile terminal is in handoff procedure, if be in handoff procedure, then goes to step 104, otherwise go to step 110.
Step 104, mobile terminal open transmit diversity, adopt multi-antenna emission diversity pattern.
Step 105, judge whether the handoff procedure of mobile terminal terminates, if do not terminated, then returns step 104, if terminated, then go to step 110.
Step 106, when mobile terminal initiate data service time, can judge according to the different condition of its data service.First judge whether data service is fixed rate data service, when carried out data service is fixed rate data service, according to the network planning, single-antenna transmission can meet data rate requirement substantially, open transmit diversity and can not improve upstream rate, gain is less, when being therefore fixed velocity service, goes to step 110; When for on-fixed speed ratio data service, enter next decision condition step 107.
Step 107, when mobile terminal need send upstream data bag less time, mobile terminal can transmit within a short period of time, and single antenna transmissions can meet Consumer's Experience requirement.Therefore packet is sent to needs and pre-set a threshold value, packet to be sent and this threshold value are compared, when lower than threshold value, goes to step 110; When higher than this threshold value, enter next decision condition step 108.
Step 108, for different communication systems, its upstream peak speed is different.Mobile terminal supports plurality of communication systems, when mobile terminal carries out data service, in different communication systems, pre-set a threshold value, this threshold value is the ratio of the theoretical up peak rate of mobile terminal upstream rate and place communication system, when the ratio of mobile terminal upstream rate and the up peak rate of theory is lower than this threshold value, goes to step 109, when the ratio of mobile terminal upstream rate and the up peak rate of theory is higher than this threshold value, go to step 110.
Step 109, mobile terminal open transmit diversity, adopt multi-antenna emission diversity pattern.
Step 110, mobile terminal close transmit diversity, adopt single-antenna transmission pattern.
When mobile terminal transmitting switches to single antenna by multiple antennas, single-antenna transmission power need improve AdB, and recommending A value to get (10lgN) dB, N is antenna number.
Step 111, a timer is set, when mobile terminal carries out business, can periodically judges switching condition, control transmit diversity state according to mobile terminal last state.
Fig. 2 is the control flow chart that the diversity mode in the embodiment of the present invention two switches.As shown in Figure 2, this control flow comprises the following steps:
After step 201, mobile terminal work on power, open transmit diversity, adopt multi-antenna emission diversity pattern.
Step 202, one is had to the mobile terminal of two antennas, in mobile terminal research and development, production process, obtain the power consumption of transmitting chain corresponding to each transmission power level by emulation, test, power consumption number calculate comprise in RF radiating circuit, analog baseband circuitry, digital baseband with transmit diversity relevant portion circuit.By the memory cell of the corresponding relation of the transmission power level on each road and transmitting chain power consumption stored in transmit diversity switching judging circuit.
During mobile terminal work, diversity mode switching judging circuit is tested two antenna place signals, obtains each road transmitting power, is designated as PA and PB respectively.Diversity mode switching judging circuit obtains the power consumption that each transmitting chain consumes from memory cell, is designated as WA and WB.
Step 203, threshold value is set, when getting two-way or any road power lower than a certain threshold value, terminal periodic emission mode is switched to single-antenna transmission, measure the transmitting power P on this road
single, transmit diversity commutation circuit obtains the power consumption that this transmitting chain consumes from memory cell, is designated as W
single.Also can not to the power setting threshold value of two-way, but regular emission mode is switched to single antenna, obtain P
singleand W
single.
Transmitting chain total consumed power under step 204, diversity mode switching judging circuit calculating diversity mode, W
many=WA+WB, with W
singlecompare.Work as W
many>W
singletime, go to step 205, otherwise go to step 206.
Step 205, closedown transmit diversity.When switching to single antenna, single-antenna transmission power need improve AdB, recommends A value to get 3dB.
For preventing pingpang handoff, average by repetitive measurement.Also, by arranging minimum switching interval, in this time period, emission mode switching is not carried out.
Step 206, open transmit diversity, adopt multi-antenna emission diversity pattern.
Step 207, a timer is set, judges mobile terminal period, control transmit diversity state according to mobile terminal last state.
Under mobile terminal is in single-antenna transmission pattern, threshold value is set, when transmitting power is higher than threshold value, the cycle will but antenna transmission pattern switches to multi-antenna emission diversity pattern, calculate W
many.Work as W
many<=W
singletime, switch to diversity mode.
Fig. 3 is the control flow chart that the diversity mode in the embodiment of the present invention three switches.As shown in Figure 3, this flow process comprises the following steps:
Step 301, mobile terminal work on power, and close transmit diversity.
Step 302, when mobile terminal initiate business time, whether mobile terminal provides control inerface, forced to enter multi-antenna emission diversity pattern by user's choice for use.When being set to pressure and entering multi-antenna emission diversity pattern, go to step 306; If do not force to enter multi-antenna emission diversity pattern, enter next decision condition step 303.
Step 303, to be in when mobile terminal the batteries such as Power supply not limited when, as powered by external power source, in order to obtain better upstream performance, improve terminal capabilities by using transmit diversity.Therefore whether this step to judge whether mobile terminal is in battery limited, if not limited, then goes to step 306; Otherwise enter next decision condition step 304.
Step 304, a threshold value is arranged to battery electric quantity, when battery electric quantity is lower than this threshold value, extends terminal use duration to reach, can transmit diversity be closed.Therefore this step judges that whether the battery electric quantity of mobile terminal is higher than the threshold value preset, and when lower than this threshold value, then goes to step 307; When higher than this threshold value, enter next decision condition 305.
Step 305, mobile terminal are after network registry, due to the needs of background service or terminal and base station synchronization, mobile terminal need send upstream control signaling, because the data volume of control signal is very little, and may communicate with base station with cycle or irregular mode continually, in order to reduce battery consumption, when sending upstream control signaling, transmit diversity can be closed.If user data, transmit diversity can be opened.Therefore this step judges that up is control signal or user data, if user data, then goes to step 306; If control signal, then go to step 307.
Step 306, open transmit diversity, adopt multi-antenna emission diversity pattern.
Step 307, closedown transmit diversity, adopt single-antenna transmission pattern.
Step 308, a timer is set, when mobile terminal carries out business, periodically switching condition is judged, control transmit diversity state according to mobile terminal last state.
In order to realize above-mentioned flow process, embodiments of the invention additionally provide the control device that a kind of diversity mode switches, as shown in Figure 4, this control device is applicable to the mobile terminal having two antennas, comprise diversity mode switching judging circuit 14, control circuit 15, digital baseband circuit 13, first analog baseband circuitry 12, second analog baseband circuitry 22, a RF radiating circuit 11 and the 2nd RF radiating circuit 21, wherein, a RF radiating circuit 11 and the 2nd RF radiating circuit 21 are connected with the first antenna 10 and the second antenna 21 respectively.
Diversity mode switching judging circuit presets one or more diversity mode switching conditions, and whole diversity mode switching condition is sorted, judge diversity mode switching condition one by one according to the order of diversity mode switching condition, control signal is sent to control circuit.
Control circuit, according to control signal, opens or cuts out digital baseband circuit, analog baseband circuitry and RF radiating circuit.
Digital baseband circuit carries out modulating-coding to digital signal, and carries out multichannel diversity, is divided into two-way, inputs to the first analog baseband circuitry and the second analog baseband circuitry respectively.
First analog baseband circuitry and the second analog baseband circuitry carry out digital-to-analog conversion to digital signal, send to a RF radiating circuit and the 2nd RF radiating circuit respectively.
One RF radiating circuit and the 2nd RF radiating circuit radio frequency signal carry out up-conversion, amplification and filtering, are sent to the first antenna and the second antenna, launch.
Mobile terminal and the said apparatus of two or more antenna are similar.
Further, embodiments of the invention also provide a kind of diversity mode switching judging circuit, and as shown in Figure 5, this circuit comprises memory cell 501, sequencing unit 502, judging unit 503 and control signal generation unit 504.
One or more diversity mode switching conditions that wherein cell stores is default, whole diversity mode switching condition sorts by sequencing unit, judging unit judges diversity mode switching condition one by one according to the order of diversity mode switching condition, control signal generation unit generates control signal, and control signal is sent to control circuit.
Technical scheme of the present invention makes mobile terminal can be suitable for various complex scene, reaches and can ensure quality of service, again by switching between multi-antenna emission diversity and single-antenna transmission, reaches the object significantly reducing power consumption of terminal.
It is noted that above embodiment is only in order to illustrate the present invention and unrestricted, the present invention is also not limited in above-mentioned citing, and all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in right of the present invention.
Claims (15)
1. a control method for diversity mode switching, is applicable to mobile terminal, it is characterized in that, comprise the following steps:
Preset and be no less than a kind of diversity mode switching condition, and whole diversity mode switching condition is sorted;
Diversity mode switching condition is judged one by one according to the order of diversity mode switching condition, if meet the condition of diversity mode, then mobile terminal adopts multi-antenna emission diversity pattern, if meet the condition of single-antenna transmission pattern, then mobile terminal adopts single-antenna transmission pattern.
2. the control method of a kind of diversity mode switching according to claim 1, it is characterized in that, mobile terminal adopts multi-antenna emission diversity pattern or single-antenna transmission pattern, carries out control realization by control circuit in RF radiating circuit, analog baseband circuitry and digital baseband circuit with transmit diversity interlock circuit.
3. the control method of a kind of diversity mode switching according to claim 1, it is characterized in that, described diversity mode switching condition comprises:
Judge that mobile terminal needs the type of service of carrying out, when carrying out speech business, adopt single-antenna transmission pattern, otherwise adopt multi-antenna emission diversity pattern.
4. the control method of a kind of diversity mode switching according to claim 1, it is characterized in that, described diversity mode switching condition comprises:
When the business of fixed rate is set up in mobile terminal and base station, adopt single-antenna transmission pattern, otherwise adopt multi-antenna emission diversity pattern.
5. the control method of a kind of diversity mode switching according to claim 1, it is characterized in that, described diversity mode switching condition comprises:
Mobile terminal be in constantly mobile in and support plurality of communication systems, when mobile terminal is in system or cross-system switches, during systematic evaluation, adopt multi-antenna emission diversity pattern, after having switched, employing single-antenna transmission pattern.
6. the control method of a kind of diversity mode switching according to claim 1, it is characterized in that, described diversity mode switching condition comprises:
When carrying out data service, the size of the packet that need transmit pre-sets threshold value.When packet is lower than described threshold value, adopt single-antenna transmission pattern, when packet is higher than described threshold value, adopt multi-antenna emission diversity pattern.
7. the control method of a kind of diversity mode switching according to claim 1, it is characterized in that, described diversity mode switching condition comprises:
Mobile terminal supports plurality of communication systems, when mobile terminal carries out data service, in different communication systems, pre-set threshold value, described threshold value is the ratio of the theoretical up peak rate of mobile terminal upstream rate and place communication system, when the ratio of mobile terminal upstream rate and the up peak rate of theory is lower than described threshold value, and employing multi-antenna emission diversity pattern, when the ratio of mobile terminal upstream rate and the up peak rate of theory is higher than described threshold value, adopt single-antenna transmission pattern.
8. the control method of a kind of diversity mode switching according to claim 1, it is characterized in that, described diversity mode switching condition comprises:
When the information that mobile terminal sends is control signal, adopt single-antenna transmission pattern, when the information that mobile terminal sends is user data, adopt multi-antenna emission diversity pattern.
9. the control method of a kind of diversity mode switching according to claim 1, it is characterized in that, described diversity mode switching condition comprises:
Threshold value is arranged to the battery electric quantity of mobile terminal, when battery electric quantity is higher than described threshold value, adopts multi-antenna emission diversity pattern, when battery electric quantity is lower than described threshold value, adopt single-antenna transmission pattern.
10. the control method of a kind of diversity mode switching according to claim 1, it is characterized in that, described diversity mode switching condition comprises:
When the battery of mobile terminal is not limited, adopt multi-antenna emission diversity pattern, the not limited situation of described battery comprises and uses external power source to power.
The control method that 11. a kind of diversity modes according to claim 1 switch, it is characterized in that, described diversity mode switching condition comprises:
Under employing multi-antenna emission diversity mode situation, when every road transmitting power is lower than predetermined threshold value, and when being no less than the transmitting chain power consumption of two-way transmitting chain power consumption higher than single antenna under present channel environment, adopt single-antenna transmission pattern.
The control method that 12. a kind of diversity modes according to claim 1 switch, is characterized in that, by mobile terminal input control signal, selects to adopt multi-antenna emission diversity pattern or single-antenna transmission pattern.
The control method that 13. a kind of diversity modes according to claim arbitrary in claim 1-12 switch, it is characterized in that, when mobile terminal is switched to single-antenna transmission pattern from multi-antenna emission diversity pattern, the transmitting power of single antenna improves (10lgN) dB, and wherein N is antenna number.
The control device that 14. 1 kinds of diversity modes switch, is applicable to mobile terminal, it is characterized in that, comprise diversity mode switching judging circuit, control circuit, digital baseband circuit, analog baseband circuitry and RF radiating circuit, wherein,
Diversity mode switching judging circuit is no less than a kind of diversity mode switching condition for presetting, and whole diversity mode switching condition is sorted, judge diversity mode switching condition one by one according to the order of diversity mode switching condition, control signal is sent to control circuit;
Control circuit is used for according to control signal, opens or close digital baseband circuit, analog baseband circuitry and RF radiating circuit;
Digital baseband circuit is used for carrying out modulating-coding to digital signal, and carries out multichannel diversity, inputs to analog baseband circuitry;
Analog baseband circuitry is used for carrying out digital-to-analog conversion to signal, sends to RF radiating circuit;
RF radiating circuit is used for radio frequency signal and carries out up-conversion, amplification and filtering.
15. 1 kinds of diversity mode switching judging circuit, is characterized in that, comprise memory cell, sequencing unit, judging unit and control signal generation unit, wherein,
Memory cell default is no less than a kind of diversity mode switching condition for storing;
Sequencing unit is used for whole diversity mode switching condition to sort;
Judging unit is used for judging diversity mode switching condition one by one according to the order of diversity mode switching condition;
Control signal for generating control signal, and is sent to control circuit by control signal generation unit.
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