CN101072413A - Mobile terminal with multi-path diversity antenna - Google Patents
Mobile terminal with multi-path diversity antenna Download PDFInfo
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- CN101072413A CN101072413A CNA2007101115591A CN200710111559A CN101072413A CN 101072413 A CN101072413 A CN 101072413A CN A2007101115591 A CNA2007101115591 A CN A2007101115591A CN 200710111559 A CN200710111559 A CN 200710111559A CN 101072413 A CN101072413 A CN 101072413A
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Abstract
The disclosed mobile terminal includes main antenna and multiplex diversity reception antenna (MDRA). The invention includes following parts and functions: being connected to main antenna, the main antenna receives main reception signal by using main antenna; being connected to MDRA, diversity reception module receives multiplex diversity signal, and selects one route of signal with best performance as diversity signal; being connected to the diversity reception module and main receiver, the baseband processor is in use for uniting diversity signal and main reception signal to form the reception signal. By the diversity technique of reception in two routes, especially, the invention designs diversity branch, which carries out diversity reception from the route with better performance in multiple routes of reception. The invention unites the signal of diversity reception with better performance and main reception signal so as to improve reception performance of mobile terminal.
Description
Technical field
The present invention relates to the communications field, more specifically, relate to portable terminal (for example, mobile phone) with multi-path diversity antenna.
Background technology
At moving communicating field, along with the growth of wireless speech and data traffic requirement, the application of wireless data service is also increasing thereupon, as: e-mail, web page browsing and note.The multimedia service demand of two-forty has comprised many business---voice, image and real-time video transmission.These business can cause developing to balanced transmission rate from present asymmetrical uplink and downlink data rate.The continuation of business demand increases in case exceeded the capacity at networking, and the means of other enhanced system capacity, throughput, coverage must be sought by operator, guarantees professional quality and maintains competitiveness in the market.
Because the objective condition of radio communication is quite abominable, when communication, be subjected to all multifactor influences, thereby cause a large amount of losses of power, wherein loss that existing spatial transmission caused and chromatic dispersion has hypsography and barrier caused shadow fading such as to block again.Also exist the energy loss that multipath fading causes simultaneously, the mutual interference between direct wave, reflected wave and the scattered wave that multipath fading is mainly produced by various reverberations and scattering object and crosstalk and travelling carriage motion and propagation medium change the factors of bringing such as frequency displacement in time and produce.
In the wireless communication system, because the influence of communication condition, the common problem of existence is the interference that transmits working frequency range is produced of successive bands.This interference effect received signal, the deviation that causes transmitting is bigger, can not be related with received signal, perhaps receiving ability is produced harmful effect.In addition, the receiver in the wireless communication system is subjected to the influence of multipath and decline simultaneously, causes the fluctuation in the relative short period (millisecond) of received signal amplitude, phase place or other performance.Under the communications of Mobile Terminals environment because the uncertainty of mobile terminal locations, disturb or potential interference source also uncertain, so, a relative terminal use, to he interference, receive multipath and decline will significantly worsen.When signal in high-frequency emission with when receiving, the deterioration of above problem also can aggravate.In order to overcome above problem, some wireless communication systems have been used the multichannel antenna at receiving terminal, so that improve the quality that transmits.Equally, use the multichannel antenna at transmitting terminal, having increased wherein, No. one antenna produces the possibility of better communication path to receiver.
When using the multipath reception antenna, antenna is spatial separation normally, and the decline that physical condition causes, multipath or interference are inequality certainly to the influence of all antennas.The selection algorithm of No. one antenna selects best antenna branch as diversity reception, and the foundation of algorithm can be the best of performance, as the intensity maximum of received signal.
Along with the expansion of telephone service, higher requirement has been arranged for the increase of power system capacity, data rate and multimedia service.About capacity, high-quality speech, data service and fail safe, cdma communication system has great advantage.In the cdma system, a plurality of users use different sign indicating number sequences and share identical frequency simultaneously.Because the user with CDMA day by day increases, in order to obtain the excellent communications quality, the scheme that research improves the performance of cdma system also gets more and more, and diversity technique is exactly a kind of.It declines when separate when different multipath components, can adopt diversity receiving technology with to anti-fading.Its basic principle is: the signal path that utilizes many transmission identical information and have approximately equalised average signal strength and separate fading characteristic, and these signals are carried out suitable merging (Combining) at receiving terminal, so that significantly reduce the influence of multipath fading, thereby improve the reliability of transmitting.In " Transmit diversity in 3G systems " literary composition, discuss diversity and can improve the performance of radio communication at the environment of decline.Diversity technique is applied in base station or portable terminal or base station and portable terminal.Yet because the complexity and the high-power damage phenomenon of base station system, in most cases it considers to use diversity technique.3GPP requires system at the base station applies antenna diversity, and portable terminal can be selected to use or need not.The cost of diversity receiving technology is to have increased the complexity that receives.In cdma system,, promptly can adopt the technology of diversity reception because the signal wideband transmit can think that the decline of multipath component is separate.Recently, diversity technique has been applied on the portable terminal, and for example, high pass CDMA20001x EVDO system has used double antenna on a portable terminal.
Summary of the invention
The present invention aims to provide a kind of portable terminal that should use diversity technique, has improved the receptivity of portable terminal.
According to an aspect of the present invention, provide a kind of portable terminal, having comprised: main antenna (701) and multichannel diversity reception antenna (801～801n); Main receiver (201a), it is connected to main antenna (701), uses main antenna (701) to receive main received signal; Diversity reception module (210), it is connected to multichannel diversity reception antenna, and (801～801n) receive the multichannel diversity signal, and therefrom select a road best signal of performance as diversity signal to use multichannel diversity reception antenna; And baseband processor (101), it is connected to diversity reception module (210), main receiver (201a), is used for diversity signal and the merging of main received signal are formed received signal.
In above-mentioned portable terminal, a road best signal of multichannel diversity signal performance is prominent one road signal.
In above-mentioned portable terminal, (801～801n) is to intersect collectionization to multi-path diversity antenna, or intelligent aerial array, or integrated aerial array.
In above-mentioned portable terminal, diversity reception module (210) comprising: the gating switch module, its be connected to multi-path diversity antenna (801～801n), be used for a road best signal of gating multichannel diversity signal performance; And diversity receiver (201b), it is connected to the gating switch module, be used for the road diversity signal that performance is best amplify with down-conversion as diversity signal.
In above-mentioned portable terminal, the gating switch module comprises: variable connector (301～301n), its be connected to respectively each road diversity antenna (801～801n), be used for conducting or turn-off from each road diversity antenna (signal of 801～801n); Controller (501), its be coupled to variable connector (301～301n), be used for differentiating that (quality of 801～801n) signal, and the switch conduction of instruction road signal that performance is best are turn-offed other switches from each road diversity antenna; And energy supply control module (102), its be connected to variable connector (301～301n) and controller (501), be used for the instruction of implementation controller (501).
In above-mentioned portable terminal, the gating switch module also comprises: band pass filter (401～401n), its be connected every road diversity antenna (801～801n) and every way switch (between 301～301n), be used for from multichannel diversity signal filtering interference signals.
In above-mentioned portable terminal, (301～301n) include: coupler (302) is coupled from diversity antenna (801～801n) signal strength signal intensities that receive to 501 each variable connector in real time; And single-pole double-throw switch (SPDT), it is connected in diversity receiver (201b) and diversity antenna, and (between 801～801n), control conducting or shutoff by energy supply control module (102), initial condition opens circuit for making switch and diversity receiver.
In above-mentioned portable terminal, controller (501) comprising: multichannel detection tube (901～901n), it is connected to each road coupler (302) respectively, and the diversity signal that is used for the high-frequency modulation signal form that will insert from the coupling of each road coupler (302) converts low frequency or direct current signal to; And comparator (902), it is connected to multichannel detection tube (901～901n), be used for comparison from multichannel detection tube (901～901n) diversity signal watt level, and adjudicate prominent one road signal as a road best signal of performance as low frequency or direct current signal form.
In above-mentioned portable terminal, also comprise: reflector (202), it is connected to main antenna (701), uses main antenna (701) emission wireless signal; Diversity receiver (201b) also is connected to reflector (202), and uses reflector (202) to transmit.
In above-mentioned portable terminal, also comprise: duplexer (601), it is connected between main antenna (701) and main receiver (201a) and the reflector (202), is used to make main receiver (201a) and the shared main antenna of reflector (202).
The present invention has optimized diversity reception, thereby whole receptivity is improved.Mobile terminal system of the present invention is realized simple, and cost is low, promotes aborning easily.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the structured flowchart according to the mobile terminal system of the embodiment of the invention;
Fig. 2 shows the structured flowchart according to the multichannel diversity reception gating of the embodiment of the invention and power judgement gating; And
Fig. 3 shows the structured flowchart of realizing that one tunnel diversity reception is differentiated.
Embodiment
The preferred implementation that the diversity reception that the present invention is proposed below in conjunction with accompanying drawing improves receptivity is further elaborated.
Fig. 1 shows the structured flowchart according to the mobile terminal system of the embodiment of the invention, and this mobile terminal system comprises:
The foregoing description scheme is compared with the existing diversity technique of portable terminal, has significantly increased the possibility of the signal strength signal intensity enhancing of diversity reception link, and diversity reception signal and main received signal improve the receptivity of portable terminal after merging.
Preferably, multi-path diversity antenna 801～801n can be the intersection collectionization, or the aerial array of intelligence, or integrated aerial array.Here the multichannel diversity reception antenna that is applied to can be the intersection collectionization, also can use the aerial array of intelligence.Along with the development of technology, be expected to the aerial array of application integration in the future.Because the factor of decline and the performance of antenna own, the signal that receives simultaneously on the two-way diversity antenna is inevitable inequality.
Wherein, a road best signal of multichannel diversity signal performance can be got prominent one road signal.Among this embodiment, in order to reduce diversity reception link 201b, thereby save cost.Simultaneously in order to realize the gating of better performances diversity reception branch road easily, the signal strength signal intensity by the diversity reception branch road decides that road in the two-way to be entered 201b by gating.
Preferably, diversity reception module 210 can comprise: the gating switch module, and it is connected to multi-path diversity antenna 801～801n, is used for a road best signal of gating multichannel diversity signal performance; And diversity receiver 201b, it is connected to the gating switch module, be used for the road diversity signal that performance is best amplify with down-conversion as diversity signal.
Fig. 2 shows the structured flowchart according to the multichannel diversity reception gating of the embodiment of the invention and power judgement gating.In Fig. 2, the signal that receives from diversity antenna is through 401 and 401n, arrives 301 and 301n then respectively.301 and 301n comprise two parts, the one, coupler 302, in real time to 501 signal strength signal intensities that receive of coupling diversity branches, the 2nd, single-pole double-throw switch (SPDT), by 102 controls, initial condition make 301 and 301n and 201b open circuit.Differentiate the signal of two-way diversity reception branch road in 501 modules after, passing through 102 control 301 or 301n gating 201b paths, the receive diversity signal amplifies and down-conversion, next transfers in line data with main received signal merging reconciliation and handles.
According to Fig. 2, the gating switch module can comprise: variable connector 301～301n, and it is connected to each road diversity antenna 801～801n respectively, is used for conducting or the shutoff signal from each road diversity antenna 801～801n; Controller 501, it is coupled to variable connector 301～301n, is used to differentiate the quality from the signal of each road diversity antenna 801～801n, and the switch conduction of instruction road signal that performance is best, and other switches are turn-offed; And energy supply control module 102, it is connected to variable connector 301～301n and controller 501, is used for the instruction of implementation controller 501.
The gating switch module also can comprise: band pass filter 401～401n, it is connected between every road diversity antenna 801～801n and the every way switch 301～301n, is used for from multichannel diversity signal filtering interference signals.In entire wireless communication system, portable terminal receives the signal from base station, because the influence of transmission signal vector and communication environment, the signal that arrives portable terminal comprises useful signal and interference signal from all directions, and the signal strength signal intensity difference.So at first through 401 and 401n, filtering interference signals.
Each variable connector 301～301n all can comprise: coupler 302, the signal strength signal intensity that receives from diversity antenna 801～801n to 501 couplings in real time; And single-pole double-throw switch (SPDT), it is connected between diversity receiver 201b and the diversity antenna 801～801n, controls conducting or shutoff by energy supply control module 102, and initial condition opens circuit for making switch and diversity receiver.
Fig. 3 shows the structured flowchart of realizing that one tunnel diversity reception is differentiated.Behind the signal of diversity reception from base station, at first to carry out the conversion of signal, high-frequency modulation signal is converted to low frequency or direct current signal, here we use 901 and 901n realize, specifically can use simple detection tube and change, also can select for use integrated wave detector to change.901 and the specific implementation of 901n module can come according to actual conditions fixed.Next, the direct current signal after the two-way conversion is through 902, and it is stronger to compare in the two-way diversity reception that road signal by 902 modules.But the comparator of 902 module application integration is realized here.902 output direct current signals generally are high level or low level.At last, 902 output signal is controlled gating performance diversity reception branch road preferably by 101 and 102, enters 201b.301 and 301n a road by gating, another road is by 102 controls, make 301 or 301n be in off-state, thereby one tunnel diversity reception is disconnected.Real-time that road diversity reception performance of judgement of system is better, and this diversity reception branch road of real-time gating, disconnects another road simultaneously.
According to Fig. 3, controller 501 can comprise: multichannel detection tube 901～901n, and it is connected to each road coupler 302 respectively, and the diversity signal that is used for the high-frequency modulation signal form that will insert from 302 couplings of each road coupler converts low frequency or direct current signal to; And comparator 902, it is connected to multichannel detection tube 901～901n, be used for the diversity signal watt level as low frequency or direct current signal form of comparison, and adjudicate prominent one road signal as a road best signal of performance from multichannel detection tube 901～901n.
Preferably, in above-mentioned portable terminal, also can comprise: reflector 202, it is connected to main antenna 701, uses main antenna 701 emission wireless signals; Diversity receiver 201b also is connected to reflector 202, and uses reflector 202 to transmit.
Also can comprise in above-mentioned portable terminal: duplexer 601, it is connected between main antenna 701 and main receiver 201a and the reflector 202, is used to make main receiver 201a and reflector 202 shared main antennas.
The foregoing description is used the multipath reception antenna at the diversity reception branch road; The receiving branch of selecting performance best (power maximum) is as diversity reception; Application switch gating and performance comparison circuit are realized the selection of receiving branch, comprise the judgement of power, the gating of branch road and the switching of branch road gating and power judgement.
As seen, the embodiment of the invention is based on the existing communication technology, and purpose is for reduce the influence of external interference and decline, the intensity of raising received signal, thereby the carrier-to-noise ratio of improvement reception link, and then improvement receptivity as far as possible.The embodiment of the invention mainly is to propose a kind of solution division that improves the portable terminal receptivity, system applies the two-way reception, be divided into main the reception and diversity reception.The shared main antenna of main receiver and reflector has been used the multichannel antenna at the diversity reception branch road, merges as diversity reception and main received signal by optimized choice one tunnel.Optimized Algorithm is realized by control module.
The embodiment of the invention is compared with the diversity technique that portable terminal has now been used, has significantly increased the possibility of the signal strength signal intensity enhancing of diversity reception link, and diversity reception signal and main received signal improve the receptivity of portable terminal after merging.
The present invention has optimized diversity reception, thereby whole receptivity is improved.Mobile terminal system of the present invention is realized simple, and cost is low, promotes aborning easily.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.Should be understood that the variation in these concrete enforcements is conspicuous for a person skilled in the art, do not break away from spiritual protection range of the present invention.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a portable terminal is characterized in that, comprising:
Main antenna (701) and multichannel diversity reception antenna (801～801n);
Main receiver (201a), it is connected to described main antenna (701), uses described main antenna (701) to receive main received signal;
Diversity reception module (210), it is connected to described multichannel diversity reception antenna, and (801～801n) receive the multichannel diversity signal, and therefrom select a road best signal of performance as diversity signal to use described multichannel diversity reception antenna; And
Baseband processor (101), it is connected to described diversity reception module (210), main receiver (201a), is used for described diversity signal and described main received signal merging are formed received signal.
2. portable terminal according to claim 1 is characterized in that, a road best signal of described multichannel diversity signal performance is prominent one road signal.
3. portable terminal according to claim 1 is characterized in that, (801～801n) is to intersect collectionization to described multi-path diversity antenna, or intelligent aerial array, or integrated aerial array.
4. according to each described portable terminal in the claim 1 to 3, it is characterized in that described diversity reception module (210) comprising:
The gating switch module, its be connected to described multi-path diversity antenna (801～801n), be used for a road best signal of the described multichannel diversity signal of gating performance; And
Diversity receiver (201b), it is connected to described gating switch module, be used for the road diversity signal that described performance is best amplify with down-conversion as diversity signal.
5. portable terminal according to claim 4 is characterized in that, described gating switch module comprises:
Variable connector (301～301n), its be connected to respectively each road diversity antenna (801～801n), be used for conducting or turn-off from each road diversity antenna (signal of 801～801n);
Controller (501), its be coupled to described variable connector (301～301n), be used for differentiating that (quality of 801～801n) signal, and the switch conduction of instruction road signal that performance is best are turn-offed other switches from each road diversity antenna; And
Energy supply control module (102), its be connected to described variable connector (301～301n) and controller (501), be used to carry out the instruction of described controller (501).
6. portable terminal according to claim 5 is characterized in that, described gating switch module also comprises:
Band pass filter (401～401n), its be connected every road diversity antenna (801～801n) and every way switch (between 301～301n), be used for from described multichannel diversity signal filtering interference signals.
7. portable terminal according to claim 5 is characterized in that, each described variable connector (301～301n) include:
Coupler (302) is coupled from described diversity antenna (801～801n) signal strength signal intensities that receive to 501 in real time; And
Single-pole double-throw switch (SPDT), it is connected in described diversity receiver (201b) and described diversity antenna, and (between 801～801n), control conducting or shutoff by described energy supply control module (102), initial condition opens circuit for making described switch and described diversity receiver.
8. portable terminal according to claim 5 is characterized in that, described controller (501) comprising:
(901～901n), it is connected to the described coupler in each road (302) respectively to the multichannel detection tube, and the diversity signal that is used for the high-frequency modulation signal form that will insert from the described coupler in each road (302) coupling converts low frequency or direct current signal to; And
Comparator (902), it is connected to described multichannel detection tube (901～901n), be used for comparison from described multichannel detection tube (901～901n) diversity signal watt level, and adjudicate prominent one road signal as a road best signal of described performance as low frequency or direct current signal form.
9. portable terminal according to claim 1 is characterized in that, also comprises:
Reflector (202), it is connected to main antenna (701), uses described main antenna (701) emission wireless signal;
Described diversity receiver (201b) also is connected to described reflector (202), and uses described reflector (202) to transmit.
10. portable terminal according to claim 9 is characterized in that, also comprises:
Duplexer (601), it is connected between described main antenna (701) and described main receiver (201a) and the described reflector (202), is used to make described main receiver (201a) and the shared described main antenna of described reflector (202).
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007101115591A CN101072413A (en) | 2007-03-01 | 2007-06-19 | Mobile terminal with multi-path diversity antenna |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200710005615 | 2007-03-01 | ||
| CN200710005615.3 | 2007-03-01 | ||
| CNA2007101115591A CN101072413A (en) | 2007-03-01 | 2007-06-19 | Mobile terminal with multi-path diversity antenna |
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| CN101072413A true CN101072413A (en) | 2007-11-14 |
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| CNA2007101115591A Pending CN101072413A (en) | 2007-03-01 | 2007-06-19 | Mobile terminal with multi-path diversity antenna |
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| CN103718468B (en) * | 2011-08-09 | 2016-10-19 | 谷歌技术控股有限责任公司 | Use the apparatus and method of the CDMA architecture of 3GPP2 compatible transceiver |
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| CN107645313A (en) * | 2017-08-30 | 2018-01-30 | 努比亚技术有限公司 | Antenna switching method, multi-antenna terminal and computer-readable recording medium |
| CN111969285A (en) * | 2020-08-25 | 2020-11-20 | 广州视源电子科技股份有限公司 | Antenna switching system, method, device, storage medium and processor |
| CN112532292A (en) * | 2020-11-22 | 2021-03-19 | 广州技象科技有限公司 | Receiving mode selection method and device based on signal diversity reception |
| CN112532292B (en) * | 2020-11-22 | 2021-10-08 | 广州技象科技有限公司 | Receiving mode selection method and device based on signal diversity reception |
| CN113949429A (en) * | 2021-10-15 | 2022-01-18 | 维沃移动通信有限公司 | Signal processing device and electronic equipment |
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