CN102637961B - Indoor distributed antenna system and multi-mode communication method - Google Patents
Indoor distributed antenna system and multi-mode communication method Download PDFInfo
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Abstract
The invention provides an indoor distributed antenna system and a multi-mode communication method. The system comprises a radio-frequency signal processing module, a circular polarization radiation module and a mono-polarization radiation module. The circular polarization radiation module comprises a first radiation caliber and a second radiation caliber which are the same and mutually perpendicular. The radio-frequency signal processing module is used for generating a first radio-frequency signal, a second radio-frequency signal and a third radio-frequency signal, wherein the first radio-frequency signal and the second radio-frequency signal are equal in amplitude and frequency, have a 90-degree phase difference and are transmitted to the circular polarization radiation module, and the third radio-frequency signal is transmitted to the mono-polarization radiation module. The circular polarization radiation module is used for receiving the first radio-frequency signal and transmitting a first radiation signal by means of the first radiation caliber, and receiving the second radio-frequency signal and transmitting a second radiation signal by means of the second radiation caliber. The mono-polarization radiation module is used for receiving the third radio-frequency signal and transmitting a third radiation signal. By the aid of the indoor distributed antenna system and the multi-mode communication method, mobile terminals supporting different communication system application modes in an indoor space can be guaranteed to reliably communicate.
Description
Technical field
The embodiment of the present invention relates to communication technical field, relates in particular to a kind of indoor distribution antenna system and multi-modal communications method.
Background technology
Because the proportion of indoor communications business increases day by day, in order to improve power system capacity, in indoor mobile communication system, apply multiple-input and multiple-output (Multiple-Input Multiple-Out-put, MIMO) technology.
Current indoor distribution antenna system is supported various kinds of mobile communication system, with global system for mobile communications (Global System of Mobile Communication, GSM) and Long Term Evolution (Long Term Evolution, LTE) system is example: when LTE system applies MIMO technology and gsm system be not during using MIMO technique, in order to meet the needs of the mobile terminal of supporting different communication systems, indoor distribution antenna system is mainly to receive two-way radiofrequency signal by the perpendicular polarization Radiation Module in dual polarized antenna and horizontal polarization Radiation Module, wherein, one tunnel radiofrequency signal is narrow frequency (high frequency), one tunnel radiofrequency signal is wideband (high and low frequency), thereby perpendicular polarization Radiation Module and horizontal polarization Radiation Module send the radiation signal of two-way quadrature, one path radiation signal is high frequency, one path radiation signal is high and low frequency, thereby for supporting the mobile terminal of LTE system to provide two-way incoherent high frequency radiation signal, for supporting the mobile terminal of gsm system that the radiation signal of one road low frequency is provided.
But, restriction due to dual polarized antenna technology and structural manufacturing process, cause the coverage of the two-way radiation signal that horizontal polarization Radiation Module and perpendicular polarization Radiation Module send inconsistent, and radiation frequency range difference is larger, cause supporting that the diversity reception effect of mobile terminal of LTE system is poor, support that the mobile terminal receptivity of gsm system is unstable, existing indoor distribution antenna system has certain limitation.
Summary of the invention
For the above-mentioned defect of prior art, the embodiment of the present invention provides a kind of indoor distribution antenna system and multi-modal communications method.
One aspect of the present invention provides a kind of indoor distribution antenna system, comprising:
Radio-frequency signal processing module, circular polarization radiation module and single polarization Radiation Module, described circular polarization radiation module comprises the first radiating aperture and the second radiating aperture, measure-alike and the position of described the first radiating aperture and described the second radiating aperture is orthogonal, described radio-frequency signal processing module is connected with described the second radiating aperture with described the first radiating aperture respectively, and described single polarization Radiation Module is connected with described radio-frequency signal processing module;
Described radio-frequency signal processing module, be used for generating the first radiofrequency signal, the second radiofrequency signal and the 3rd radiofrequency signal, wherein, described the first radiofrequency signal and described the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and described the first radiofrequency signal and described the second radiofrequency signal are sent to described circular polarization radiation module, and described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described circular polarization radiation module, for receiving described the first radiofrequency signal by described the first radiating aperture and sending the first radiation signal, and is received described the second radiofrequency signal and is sent the second radiation signal by described the second radiating aperture;
Described single polarization Radiation Module, for receiving described the 3rd radiofrequency signal and sending the 3rd radiation signal.
The present invention provides a kind of multi-modal communications method that indoor distribution antenna system provided by the invention is carried out of applying on the other hand, comprising:
Described radio-frequency signal processing module generates the first radiofrequency signal, the second radiofrequency signal and the 3rd radiofrequency signal, wherein, described the first radiofrequency signal and described the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and described the first radiofrequency signal and described the second radiofrequency signal are sent to described circular polarization radiation module, and described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described circular polarization radiation module is received described the first radiofrequency signal and is sent the first radiation signal by described the first radiating aperture, and is received described the second radiofrequency signal and sent the second radiation signal by described the second radiating aperture;
Described single polarization Radiation Module receives described the 3rd radiofrequency signal and sends the 3rd radiation signal.
The indoor distribution antenna system that the embodiment of the present invention provides and multi-modal communications method, by two required two-way constant amplitude equifrequency and phase differences of the communication system that meets using MIMO identical and orthogonal the first radiating aperture and the transmission of the second radiating aperture received RF signal processing module in circular polarization radiation module, be the radiofrequency signal of 90 degree and send radiation signal, thereby two-way quadrature and the consistent radiation signal of coverage in space, have been formed, while moving in the scope that makes to support the mobile terminal of the communication system of using MIMO to cover at corresponding signal, can both receive the incoherent radiation signal of two-way, there is good diversity, also by not required the penetrating signal and send radiation signal of communication system of using MIMO that meet of single polarization Radiation Module received RF signal processing module transmission, make to support can receive corresponding radiation signal when the mobile terminal of the communication system of using MIMO moves in the scope of corresponding signal covering, thereby guaranteed to support in the interior space that the mobile terminal of different communication systems application model can both carry out reliable communication.
Accompanying drawing explanation
Fig. 1 is the structural representation of an embodiment of indoor distribution antenna system of the present invention;
Fig. 2 is the flow chart of the multi-modal communications embodiment of the method one of carrying out of the indoor distribution antenna system shown in application drawing 1;
Fig. 3 is the structural representation of another embodiment of indoor distribution antenna system of the present invention;
Fig. 4 is the flow chart of the multi-modal communications embodiment of the method two of carrying out of the indoor distribution antenna system shown in application drawing 3;
Fig. 5 is the structural representation of the another embodiment of indoor distribution antenna system of the present invention;
Fig. 6 is the flow chart of the multi-modal communications embodiment of the method three of carrying out of the indoor distribution antenna system shown in application drawing 5.
Embodiment
Fig. 1 is the structural representation of an embodiment of indoor distribution antenna system of the present invention, and as shown in Figure 1, this system comprises:
Radio-frequency signal processing module 1, circular polarization radiation module 2 and single polarization Radiation Module 3, circular polarization radiation module 2 comprises the first radiating aperture 21 and the second radiating aperture 22, measure-alike and the position of the first radiating aperture 21 and the second radiating aperture 22 is orthogonal, radio-frequency signal processing module 1 is connected with the first radiating aperture 21, the second radiating aperture 22 respectively, and single polarization Radiation Module 3 is connected with radio-frequency signal processing module 1;
Wherein, radio-frequency signal processing module 1 is for generating the first radiofrequency signal, the second radiofrequency signal and the 3rd radiofrequency signal, wherein, the first radiofrequency signal and the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and the first radiofrequency signal and the second radiofrequency signal are sent to the first radiating aperture 21 and the second radiating aperture 22 in circular polarization radiation module 2, the 3rd radiofrequency signal is sent to single polarization Radiation Module 3; Circular polarization radiation module 2 is for being received the first radiofrequency signals and sent the first radiation signal by the first radiating aperture 21, and received the second radiofrequency signals and sent the second radiation signal by the second radiating aperture 22; Single polarization Radiation Module 3 is for receiving the 3rd radiofrequency signal and sending the 3rd radiation signal.
Fig. 2 is the flow chart of the multi-modal communications embodiment of the method one of carrying out of the indoor distribution antenna system shown in application drawing 1, and the method specifically comprises:
Radio-frequency signal processing module generates and meets the two-way radiofrequency signal that MIMO applies required frequency and be respectively the first radiofrequency signal and the second radiofrequency signal according to the real needs of the mobile communication system of using MIMO, wherein, the amplitude of the first radiofrequency signal and the second radiofrequency signal is identical with frequency, but phase difference is 90 degree.Be understandable that, because concrete indoor mobile communication system is different, the required frequency of using MIMO is also different, illustrate, if the needed frequency of using MIMO is the radiation signal of 2500～2690MHZ in LTE, the first radiofrequency signal that radio-frequency signal processing module generates and the frequency of the second radiofrequency signal are 2500～2690MHZ.The first radiofrequency signal and the second radiofrequency signal that radio-frequency signal processing module is 90 degree by constant amplitude equifrequency and phase difference send to circular polarization radiation module, it should be noted that, the first radiofrequency signal and the second radiofrequency signal that those of ordinary skills can understand be radio-frequency signal processing module is 90 degree by constant amplitude equifrequency and phase difference send to circular polarization radiation module by two isometric feeder lines, thereby guarantee that the first radiofrequency signal is consistent with the transmission path of the second radiofrequency signal, when arriving the first radiating aperture and the second radiating aperture, the phase difference of the first radiofrequency signal and the second radiofrequency signal is still 90 degree.Radio-frequency signal processing module also generates and meets the 3rd radiofrequency signal of respective frequencies according to the real needs of the mobile communication system of using MIMO not, and sends to single polarization Radiation Module.
Step 101, circular polarization radiation module is received the first radiofrequency signal and is sent the first radiation signal by the first radiating aperture, and is received the second radiofrequency signal and sent the second radiation signal by the second radiating aperture;
In circular polarization radiation module, comprise the first radiating aperture and the second radiating aperture, the size of the first radiating aperture and the second radiating aperture is identical with structural manufacturing process, and the first radiating aperture and the second radiating aperture orthogonal.It should be noted that what one of ordinary skill in the art will appreciate that is that the size of radiating aperture in circular polarization radiation module is according to the needed frequency of using MIMO in indoor mobile communication system and concrete setting.Circular polarization radiation module receives the first radiofrequency signal by the first radiating aperture, and receive the second radiofrequency signal by the second radiating aperture, the first radiating aperture sends the first radiation signal to the interior space after receiving the first radiofrequency signal, and the second radiating aperture sends the second radiation signal to the interior space after receiving the second radiofrequency signal.Because the first radiofrequency signal and the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and the first radiating aperture is mutually vertical with the second radiating aperture, therefore, the electric field intensity of the first radiation signal and the second radiation signal is spatially orthogonal and have isolation, thereby the first radiation signal and the second radiation signal have irrelevance.Because the size of the first radiating aperture and the second radiating aperture is identical with structural manufacturing process, and be positioned in same circular polarization radiation module, therefore, the radiation scope of the first radiation signal and the second radiation signal is spatially in full accord.Thereby in the process that the mobile terminal of supporting the communication system of using MIMO moves in corresponding signal cover, all the time can receive circular polarization radiation module by the incoherent radiation signal of two-way of the first radiating aperture and the second radiating aperture radiation, can obtain good diversity reception effect, using MIMO to greatest extent in indoor mobile communication system.
Single polarization Radiation Module receives the 3rd radiofrequency signal and also to the interior space, sends the 3rd radiation signal, thereby the mobile terminal of supporting the communication system of using MIMO can receive corresponding radiation signal in mobile process in corresponding signal cover, communicates.
It should be noted that, what one of ordinary skill in the art will appreciate that is that circular polarization radiation module in the embodiment of the present invention specifically comprises: microband paste circular polarization radiation module, spiral circle polarized radiation module etc., and the circular polarization radiation module with identical and mutually perpendicular the first radiating aperture and the second radiating aperture all can be carried out the function of circular polarization radiation module in the embodiment of the present invention; Single polarization Radiation Module comprises: horizontal polarization Radiation Module and perpendicular polarization Radiation Module, the embodiment of the present invention is not limited this.
Therefore, compared with prior art, the indoor distribution antenna system that the present embodiment provides and apply the multi-modal communications method that this indoor distribution antenna system is carried out, required two-way constant amplitude equifrequency and the phase difference of the communication system that meets using MIMO sending by two isometric feeder lines by two identical and orthogonal the first radiating apertures in circular polarization radiation module and the second radiating aperture received RF signal processing module is the radiofrequency signal of 90 degree and sends radiation signal, thereby two-way quadrature and the consistent radiation signal of coverage in space, have been formed, while moving in the scope that makes to support the mobile terminal of the communication system of using MIMO to cover at corresponding signal, can both receive the incoherent radiation signal of two-way, there is good diversity reception effect, also by not required the penetrating signal and send radiation signal of communication system of using MIMO that meet of single polarization Radiation Module received RF signal processing module transmission, make to support can receive corresponding radiation signal when the mobile terminal of the communication system of using MIMO moves in the scope of corresponding signal covering, thereby guaranteed to support the mobile terminal of different communication systems application model can both carry out reliable communication.
Fig. 3 is the structural representation of another embodiment of indoor distribution antenna system of the present invention, as shown in Figure 3, based on embodiment illustrated in fig. 1, radio-frequency signal processing module 1 comprises: remote radio unit (RRU) 11, splitter 12, phase shifter 13, wherein, remote radio unit (RRU) 11 is connected with phase shifter 13 with splitter 12 respectively, and splitter 12 is connected with phase shifter 13 with single polarization Radiation Module 3 respectively, and phase shifter 13 is connected with the second radiating aperture 22 with the first radiating aperture 21 respectively;
Wherein, remote radio unit (RRU) 11 is for generating the first radiofrequency signal and the 4th radiofrequency signal, and the first radiofrequency signal is sent to phase shifter 13, and the 4th radiofrequency signal is sent to splitter 12; Splitter 12 is processed generation the second radiofrequency signal and the 3rd radiofrequency signal for the 4th radiofrequency signal being carried out to shunt, make the second radiofrequency signal and the first radiofrequency signal equifrequency constant amplitude, and the second radiofrequency signal is sent to phase shifter 13, the 3rd radiofrequency signal is sent to single polarization Radiation Module 3; Phase shifter 13 is for carrying out phase shift processing to the first radiofrequency signal and/or the second radiofrequency signal, the phase difference that makes the first radiofrequency signal and the second radiofrequency signal is 90 degree, and the first radiofrequency signal is sent to the first radiating aperture 21, the second radiofrequency signal is sent to the second radiating aperture 22.
Fig. 4 is the flow chart of the multi-modal communications embodiment of the method two of carrying out of the indoor distribution antenna system shown in application drawing 3, as shown in Figure 4, take the LTE system of using MIMO and not the gsm system of using MIMO describe the processing procedure of this indoor distribution antenna system in detail as example, the method specifically comprises:
Step 200, remote radio unit (RRU) generates the first radiofrequency signal and the 4th radiofrequency signal, and the first radiofrequency signal is sent to phase shifter, and the 4th radiofrequency signal is sent to splitter;
Remote radio unit (RRU) carries out modulation treatment to the base band light signal receiving, thereby generate the first radiofrequency signal and the 4th radiofrequency signal that meet LTE system and gsm system, wherein, the first radiofrequency signal is high-frequency signal, and the 4th radiofrequency signal is the broadband signal that comprises high and low frequency.Remote radio unit (RRU) sends to phase shifter by the first radiofrequency signal, and the 4th radiofrequency signal is sent to splitter.
Step 201, splitter carries out shunt to the 4th radiofrequency signal and processes generation the second radiofrequency signal and the 3rd radiofrequency signal, make the second radiofrequency signal and the first radiofrequency signal constant amplitude equifrequency, and the second radiofrequency signal is sent to described phase shifter, the 3rd radiofrequency signal is sent to single polarization Radiation Module;
The frequency that splitter has set in advance the LTE system of using MIMO is the frequency of the first radiofrequency signal, therefore, splitter carries out shunt according to this default frequency to the 4th radiofrequency signal and processes generation the second radiofrequency signal and the 3rd radiofrequency signal, making the second radiofrequency signal and the first radiofrequency signal equifrequency is that the amplitude of high-frequency signal and the second radiofrequency signal and the first radiofrequency signal is identical, and the 3rd radiofrequency signal is low frequency signal.Splitter sends to phase shifter by the second radiofrequency signal, and the 3rd radiofrequency signal is sent to single polarization Radiation Module.
Step 202, single polarization Radiation Module receives the 3rd radiofrequency signal and sends the 3rd radiation signal.
Single polarization Radiation Module sends the 3rd radiation signal to the interior space after receiving the 3rd radiofrequency signal, thereby the low frequency signal that can obtain the radiation of single polarization Radiation Module in corresponding signal cover while supporting the mobile terminal of gsm system to move in the interior space communicates.
Step 203, phase shifter carries out phase shift processing to the first radiofrequency signal and/or the second radiofrequency signal, the phase difference that makes the first radiofrequency signal and the second radiofrequency signal is 90 degree, and the first radiofrequency signal is sent to the first radiating aperture, and the second radiofrequency signal is sent to the second radiating aperture;
Phase shifter is after receiving the first radiofrequency signal and the second radiofrequency signal, according to the phase place of the first radiofrequency signal and the second radiofrequency signal, the first radiofrequency signal and/or the second radiofrequency signal are carried out to phase shift processing, the phase difference that makes the first radiofrequency signal and the second radiofrequency signal is 90 degree, and the first radiofrequency signal is sent to the first radiating aperture, the second radiofrequency signal is sent to the second radiating aperture, it should be noted that, the first radiofrequency signal and the second radiofrequency signal that those of ordinary skills can understand be phase shifter is 90 degree by constant amplitude equifrequency and phase difference send to circular polarization radiation module by two isometric feeder lines, thereby guarantee that the first radiofrequency signal is identical with the transmission path of the second radiofrequency signal, when arriving the first radiating aperture and the second radiating aperture, phase difference is still 90 degree.
Step 204, circular polarization radiation module is received the first radiofrequency signal and is sent the first radiation signal by the first radiating aperture, and is received the second radiofrequency signal and sent the second radiation signal by the second radiating aperture.
Circular polarization radiation module sends first radiation signal to the interior space by the first radiating aperture after receiving the first radiofrequency signal, by the second radiating aperture, after receiving the second radiofrequency signal, to the interior space, sends the second radiation signal.Because the first radiofrequency signal and the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and the first radiating aperture is mutually vertical with the second radiating aperture, therefore, the electric field intensity of the first radiation signal and the second radiation signal is spatially orthogonal and have isolation, thereby the first radiation signal and the second radiation signal have irrelevance.Because the size of the first radiating aperture and the second radiating aperture is identical with structural manufacturing process, and be positioned in same circular polarization radiation module, therefore, the radiation scope of the first radiation signal and the second radiation signal is spatially in full accord.Thereby in the process that the mobile terminal of supporting LTE system moves in corresponding signal cover, all the time can receive circular polarization radiation module by the incoherent radiation signal of two-way of the first radiating aperture and the second radiating aperture radiation, can obtain good diversity, using MIMO to greatest extent in indoor mobile communication system.
The indoor distribution antenna system that the present embodiment provides and apply the multi-modal communications method that this indoor distribution antenna system is carried out, by two identical and orthogonal the first radiating apertures in circular polarization radiation module and the second radiating aperture, by feeder line, receiving two-way constant amplitude equifrequency and the phase difference through phase shifter, processed is the radiofrequency signal of 90 degree and sends radiation signal, thereby two-way quadrature and the consistent radiation signal of coverage in space, have been formed, while moving in the scope that makes to support the mobile terminal of LTE system to cover at corresponding signal, can both receive the incoherent radiation signal of two-way, there is good diversity reception effect, also by single polarization Radiation Module, receive the radiation signal sending after splitter is processed, while moving in the scope that makes to support the mobile terminal of gsm system to cover at corresponding signal, can receive corresponding radiation signal and communicate, thereby guarantee to support in the interior space that the mobile terminal of different communication systems application model can both carry out reliable communication.
Fig. 5 is the structural representation of the another embodiment of indoor distribution antenna system of the present invention, as shown in Figure 5, the present embodiment is that microband paste circular polarization radiation module and single polarization Radiation Module are that the concrete processing procedure of perpendicular polarization Radiation Module is elaborated for the circular polarization radiation module in embodiment illustrated in fig. 1.As shown in Figure 5, this system comprises: radio-frequency signal processing module 1, microband paste circular polarization radiation module 4 and perpendicular polarization Radiation Module 5, microband paste circular polarization radiation module 4 comprises the first radiating aperture 41, the second radiating aperture 42, the 3rd radiating aperture 43 and the 4th radiating aperture 44, the first radiating aperture 41 and the 3rd radiating aperture 43 are parallel to each other, the second radiating aperture 42 and the 4th radiating aperture 44 are parallel to each other, the first radiating aperture 41 is identical orthogonal with the second radiating aperture 42, and the 3rd radiating aperture 43 is mutually vertical with the 4th radiating aperture 44.Radio-frequency signal processing module 1 specifically comprises: remote radio unit (RRU) 11, splitter 12, controller 14, the first feeder line 15 and the second feeder line 16, remote radio unit (RRU) 11 is connected with controller 14 with splitter 12 respectively, and splitter 12 is connected with controller 14 with perpendicular polarization Radiation Module 5 respectively; Controller 14 is connected with the first radiating aperture 41 by the first feeder line 15, and is connected with the second radiating aperture 42 by the second feeder line 16;
Wherein, remote radio unit (RRU) 11 is for generating the first radiofrequency signal and the 4th radiofrequency signal, and the first radiofrequency signal is sent to controller 14, and the 4th radiofrequency signal is sent to splitter 12; Splitter 12 is processed generation the second radiofrequency signal and the 3rd radiofrequency signal for the 4th radiofrequency signal being carried out to shunt, make the second radiofrequency signal and the first radiofrequency signal constant amplitude equifrequency, and the second radiofrequency signal is sent to controller 14, the 3rd radiofrequency signal is sent to perpendicular polarization Radiation Module 5; Controller 14 is for controlling the transmitting time of the first radiofrequency signal and the second radiofrequency signal according to the length difference of the phase difference of the first radiofrequency signal and the second radiofrequency signal and the first feeder line 15 and the second feeder line 16, so that the first radiofrequency signal is when being transferred to the first radiating aperture 41 and the second radiofrequency signal and being transferred to the second radiating aperture 42 by the second feeder line 16 by the first feeder line 15, the phase difference of the first radiofrequency signal and the second radiofrequency signal is 90 degree.
Fig. 6 is the flow chart of the multi-modal communications embodiment of the method three of carrying out of the indoor distribution antenna system shown in application drawing 5, and as shown in Figure 3, the method specifically comprises:
Remote radio unit (RRU) carries out modulation treatment to the base band light signal receiving, thereby generates the first radiofrequency signal and the 4th radiofrequency signal that meets multi-mode communication system application, and wherein, the first radiofrequency signal is narrow frequency signal, and the 4th radiofrequency signal is broadband signal.Remote radio unit (RRU) sends to controller by the first radiofrequency signal, and the 4th radiofrequency signal is sent to splitter.
The frequency that splitter has set in advance the communication system of using MIMO is frequency and the amplitude of the first radiofrequency signal, therefore, splitter carries out shunt processing generation the second radiofrequency signal and the 3rd radiofrequency signal according to this default frequency and amplitude to the 4th radiofrequency signal, making the second radiofrequency signal and the first radiofrequency signal equifrequency is narrow frequency signal and to make the second radiofrequency signal identical with the amplitude of the first radiofrequency signal, and the 3rd radiofrequency signal is to meet the not signal of the communication system of using MIMO.Splitter sends to controller by the second radiofrequency signal, and the 3rd radiofrequency signal is sent to perpendicular polarization Radiation Module.
Perpendicular polarization Radiation Module sends the 3rd radiation signal to the interior space after receiving the 3rd radiofrequency signal, thereby in the interior space, supports the signal that can obtain the radiation of perpendicular polarization Radiation Module when the mobile terminal of using MIMO does not move in corresponding signal cover to communicate.
Controller detects the phase place of the first radiofrequency signal and the second radiofrequency signal, thereby obtains the phase difference of the first radiofrequency signal and the second radiofrequency signal.Controller detects the length of the first feeder line and the second feeder line, thereby obtains the length difference of the first feeder line and the second feeder line.It should be noted that, what one of ordinary skill in the art will appreciate that is that the detection mode of controller correlation frequency signal phase can be accomplished in several ways, and comprises software test and hardware circuit test.Controller can, by modes such as physical measurement, signal returns, repeat no more the detection mode of feeder line length herein.
Step 304, controller is controlled the transmitting time of the first radiofrequency signal and the second radiofrequency signal according to described phase difference and described length difference, so that the first radiofrequency signal is when being transferred to the first radiating aperture and the second radiofrequency signal and being transferred to the second radiating aperture by the second feeder line by the first feeder line, the phase difference of the first radiofrequency signal and the second radiofrequency signal is 90 degree;
Because the first radiofrequency signal is identical with the frequency of the second radiofrequency signal, so the wavelength of the first radiofrequency signal and the second radiofrequency signal is identical with the propagation cycle, because the first radiofrequency signal is transmitted by the first feeder line, the second radiofrequency signal is transmitted by the second feeder line, therefore, the length of the first feeder line is the transmission path of the first radiofrequency signal, and the length of the second feeder line is the transmission path of the second radiofrequency signal.Controller is according to detecting the first radiofrequency signal and the phase difference of the second radiofrequency signal and the length difference of the first feeder line and the second feeder line obtaining, each phase cycling of reference sine wave is 2 π, if change the phase place of 90 °, be π/4, the transmission time shifts to an earlier date or hysteresis T/4, be that transmission path increases or reduce l/4, the delay inequality that sends the first radiofrequency signal and the second radiofrequency signal is obtained in calculating, thereby control the transmitting time of the first radiofrequency signal and the second radiofrequency signal, so that the first radiofrequency signal is when being transferred to the first radiating aperture and the second radiofrequency signal and being transferred to the second radiating aperture by the second feeder line by the first feeder line, the phase difference of the first radiofrequency signal and the second radiofrequency signal is 90 degree.
For how clearer explanation controller obtains the delay inequality of the first radiofrequency signal and the second radiofrequency signal according to the length difference of the phase difference of the first radiofrequency signal and the second radiofrequency signal and the first feeder line and the second feeder line, several simple application scenarioss of take describe as example.Such as: if detecting, controller knows that the phase difference of the first radiofrequency signal and the second radiofrequency signal and the length difference of the first feeder line and the second feeder line are zero, illustrate that the phase place of the first radiofrequency signal and the second radiofrequency signal is identical and transmission path is identical, controlling the transmission delay of the first radiofrequency signal and the second radiofrequency signal poor is 1/4th the odd-multiple in the propagation cycle of the first radiofrequency signal or the second radiofrequency signal.If detecting, controller knows that the phase difference of the first radiofrequency signal and the second radiofrequency signal is zero, and the length difference of the first feeder line and the second feeder line is 1/4th odd-multiple of the wavelength of the first radiofrequency signal or the second radiofrequency signal, illustrate that the identical and transmission path of the phase place of the first radiofrequency signal and the second radiofrequency signal differs the phase difference of 90 degree, sends the first radiofrequency signal and the second radiofrequency signal simultaneously.
In microband paste circular polarization radiation module, comprise four sizes and the identical radiating aperture of structural manufacturing process, and first is parallel with the 3rd radiating aperture, second is parallel with the 4th radiating aperture, and the first and second radiating apertures are orthogonal, and the third and fourth radiating aperture is orthogonal.It should be noted that what one of ordinary skill in the art will appreciate that is that the size of radiating aperture in circular polarization radiation module is according to the needed frequency of using MIMO in indoor mobile communication system and concrete setting.
Microband paste circular polarization radiation module receives the first radiofrequency signal by the first radiating aperture, and receive the second radiofrequency signal by the second radiating aperture, the first radiating aperture sends the first radiation signal by the first and the 3rd radiating aperture to the interior space after receiving the first radiofrequency signal, and the second radiating aperture sends the second radiation signal by the second and the 4th radiating aperture to the interior space after receiving the second radiofrequency signal.Because the first radiofrequency signal and the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and the first radiating aperture is mutually vertical with the second radiating aperture, therefore, the electric field intensity of the first radiation signal and the second radiation signal is spatially orthogonal and have isolation, thereby the first radiation signal and the second radiation signal have irrelevance.Because the size of four radiating apertures is identical with structural manufacturing process, and be positioned in same microband paste circular polarization radiation module, therefore, the radiation scope of the first radiation signal and the second radiation signal is spatially in full accord.Thereby in the process that indoor moving terminal moves in signal cover, all the time can receive the incoherent radiation signal of two-way of microband paste circular polarization radiation module radiation, can obtain good diversity reception effect, using MIMO to greatest extent in indoor mobile communication system.It should be noted that the present embodiment also can carry out the function of above-mentioned the first radiating aperture and the second radiating aperture by orthogonal the 3rd radiating aperture and the 4th radiating aperture, repeat no more herein.
The indoor distribution antenna system that the present embodiment provides and apply the multi-modal communications method that this indoor distribution antenna system is carried out, by two identical and orthogonal the first radiating apertures in microband paste circular polarization radiation module and the second radiating aperture, by feeder line, receive the radiofrequency signal sending through controller, thereby two-way quadrature and the consistent radiation signal of coverage in space, have been formed, while moving in the scope that makes to support the mobile terminal of MIMO application to cover at corresponding signal, can both receive the incoherent radiation signal of two-way, there is good diversity reception effect, also by perpendicular polarization Radiation Module, receive the radiation signal sending after splitter is processed, make to support that when the mobile terminal of the system of using MIMO moves in the scope of corresponding signal covering, can receive corresponding radiation signal communicates, thereby guaranteed to support in the interior space that the mobile terminal of different communication systems application model can both carry out reliable communication.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computer read/write memory medium, this program, when carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. an indoor distribution antenna system, is characterized in that, comprising:
Radio-frequency signal processing module, circular polarization radiation module and single polarization Radiation Module, described circular polarization radiation module comprises the first radiating aperture and the second radiating aperture, measure-alike and the position of described the first radiating aperture and described the second radiating aperture is orthogonal, described radio-frequency signal processing module is connected with described the second radiating aperture with described the first radiating aperture respectively, and described single polarization Radiation Module is connected with described radio-frequency signal processing module;
Described radio-frequency signal processing module, be used for generating the first radiofrequency signal, the second radiofrequency signal and the 3rd radiofrequency signal, wherein, described the first radiofrequency signal and described the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and described the first radiofrequency signal and described the second radiofrequency signal are sent to described circular polarization radiation module, and described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described circular polarization radiation module, for receiving described the first radiofrequency signal by described the first radiating aperture and sending the first radiation signal, and is received described the second radiofrequency signal and is sent the second radiation signal by described the second radiating aperture;
Described single polarization Radiation Module, for receiving described the 3rd radiofrequency signal and sending the 3rd radiation signal;
Wherein, described radio-frequency signal processing module comprises:
Remote radio unit (RRU), splitter and phase shifter, wherein, described remote radio unit (RRU) is connected with described phase shifter with described splitter respectively, described splitter is connected with described phase shifter with described single polarization Radiation Module respectively, and described phase shifter is connected with described the second radiating aperture with described the first radiating aperture respectively;
Described remote radio unit (RRU), for generating the first radiofrequency signal and the 4th radiofrequency signal, and sends to described phase shifter by described the first radiofrequency signal, and described the 4th radiofrequency signal is sent to described splitter;
Described splitter, for described the 4th radiofrequency signal being carried out to shunt, process generation the second radiofrequency signal and the 3rd radiofrequency signal, make the second radiofrequency signal and described the first radiofrequency signal constant amplitude equifrequency, and described the second radiofrequency signal is sent to described phase shifter, described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described phase shifter, for described the first radiofrequency signal and/or described the second radiofrequency signal are carried out to phase shift processing, the phase difference that makes described the first radiofrequency signal and described the second radiofrequency signal is 90 degree, and described the first radiofrequency signal is sent to described the first radiating aperture, described the second radiofrequency signal is sent to described the second radiating aperture.
2. indoor distribution antenna system according to claim 1, is characterized in that,
Described circular polarization radiation module is microband paste circular polarization radiation module or spiral circle polarized radiation module.
3. indoor distribution antenna system according to claim 1, is characterized in that, described single polarization Radiation Module is perpendicular polarization Radiation Module or horizontal polarization Radiation Module.
4. an indoor distribution antenna system, is characterized in that, comprising:
Radio-frequency signal processing module, circular polarization radiation module and single polarization Radiation Module, described circular polarization radiation module comprises the first radiating aperture and the second radiating aperture, measure-alike and the position of described the first radiating aperture and described the second radiating aperture is orthogonal, described radio-frequency signal processing module is connected with described the second radiating aperture with described the first radiating aperture respectively, and described single polarization Radiation Module is connected with described radio-frequency signal processing module;
Described radio-frequency signal processing module, be used for generating the first radiofrequency signal, the second radiofrequency signal and the 3rd radiofrequency signal, wherein, described the first radiofrequency signal and described the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and described the first radiofrequency signal and described the second radiofrequency signal are sent to described circular polarization radiation module, and described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described circular polarization radiation module, for receiving described the first radiofrequency signal by described the first radiating aperture and sending the first radiation signal, and is received described the second radiofrequency signal and is sent the second radiation signal by described the second radiating aperture;
Described single polarization Radiation Module, for receiving described the 3rd radiofrequency signal and sending the 3rd radiation signal;
Wherein, described radio-frequency signal processing module comprises:
Remote radio unit (RRU), splitter, controller, the first feeder line and the second feeder line, wherein, described remote radio unit (RRU) is connected with described controller with described splitter respectively, and described splitter is connected with described controller with described single polarization Radiation Module respectively;
Described controller is connected with described the first radiating aperture by described the first feeder line, and is connected with described the second radiating aperture by described the second feeder line;
Described remote radio unit (RRU), for generating the first radiofrequency signal and the 4th radiofrequency signal, and sends to described controller by described the first radiofrequency signal, and described the 4th radiofrequency signal is sent to described splitter;
Described splitter, for described the 4th radiofrequency signal being carried out to shunt, process generation the second radiofrequency signal and the 3rd radiofrequency signal, make the second radiofrequency signal and described the first radiofrequency signal constant amplitude equifrequency, and described the second radiofrequency signal is sent to described controller, described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described controller, for control the transmitting time of described the first radiofrequency signal and described the second radiofrequency signal according to the length difference of the phase difference of described the first radiofrequency signal and described the second radiofrequency signal and described the first feeder line and described the second feeder line, so that described the first radiofrequency signal is when being transferred to described the first radiating aperture and described the second radiofrequency signal and being transferred to described the second radiating aperture by described the second feeder line by described the first feeder line, the phase difference of described the first radiofrequency signal and described the second radiofrequency signal is 90 degree.
5. indoor distribution antenna system according to claim 4, is characterized in that,
Described circular polarization radiation module is microband paste circular polarization radiation module or spiral circle polarized radiation module.
6. indoor distribution antenna system according to claim 4, is characterized in that, described single polarization Radiation Module is perpendicular polarization Radiation Module or horizontal polarization Radiation Module.
7. the multi-modal communications method that application indoor distribution antenna system as claimed in claim 1 is carried out, is characterized in that, comprising:
Described radio-frequency signal processing module generates the first radiofrequency signal, the second radiofrequency signal and the 3rd radiofrequency signal, wherein, described the first radiofrequency signal and described the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and described the first radiofrequency signal and described the second radiofrequency signal are sent to described circular polarization radiation module, and described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described circular polarization radiation module is received described the first radiofrequency signal and is sent the first radiation signal by described the first radiating aperture, and is received described the second radiofrequency signal and sent the second radiation signal by described the second radiating aperture;
Described single polarization Radiation Module receives described the 3rd radiofrequency signal and sends the 3rd radiation signal;
Wherein, described radio-frequency signal processing module comprises: remote radio unit (RRU), splitter and phase shifter,
Described remote radio unit (RRU) generates the first radiofrequency signal and the 4th radiofrequency signal, and described the first radiofrequency signal is sent to described phase shifter, and described the 4th radiofrequency signal is sent to described splitter;
Described splitter carries out shunt to described the 4th radiofrequency signal and processes generation the second radiofrequency signal and the 3rd radiofrequency signal, make the second radiofrequency signal and described the first radiofrequency signal constant amplitude equifrequency, and described the second radiofrequency signal is sent to described phase shifter, described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described phase shifter carries out phase shift processing to described the first radiofrequency signal and/or described the second radiofrequency signal, the phase difference that makes described the first radiofrequency signal and described the second radiofrequency signal is 90 degree, and described the first radiofrequency signal is sent to described the first radiating aperture, described the second radiofrequency signal is sent to described the second radiating aperture.
8. the multi-modal communications method that application indoor distribution antenna system as claimed in claim 4 is carried out, is characterized in that, comprising:
Described radio-frequency signal processing module generates the first radiofrequency signal, the second radiofrequency signal and the 3rd radiofrequency signal, wherein, described the first radiofrequency signal and described the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and described the first radiofrequency signal and described the second radiofrequency signal are sent to described circular polarization radiation module, and described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described circular polarization radiation module is received described the first radiofrequency signal and is sent the first radiation signal by described the first radiating aperture, and is received described the second radiofrequency signal and sent the second radiation signal by described the second radiating aperture;
Described single polarization Radiation Module receives described the 3rd radiofrequency signal and sends the 3rd radiation signal;
Wherein, described radio-frequency signal processing module comprises: remote radio unit (RRU), splitter, controller, the first feeder line and the second feeder line,
Described remote radio unit (RRU) generates the first radiofrequency signal and the 4th radiofrequency signal, and described the first radiofrequency signal is sent to described controller, and described the 4th radiofrequency signal is sent to described splitter;
Described splitter carries out shunt to described the 4th radiofrequency signal and processes generation the second radiofrequency signal and the 3rd radiofrequency signal, make the second radiofrequency signal and described the first radiofrequency signal constant amplitude equifrequency, and described the second radiofrequency signal is sent to described controller, described the 3rd radiofrequency signal is sent to described single polarization Radiation Module;
Described controller detects the phase difference of described the first radiofrequency signal and described the second radiofrequency signal and the length difference of described the first feeder line and described the second feeder line;
Described controller is controlled the transmitting time of described the first radiofrequency signal and described the second radiofrequency signal according to described phase difference and described length difference, so that described the first radiofrequency signal is when being transferred to described the first radiating aperture and described the second radiofrequency signal and being transferred to described the second radiating aperture by described the second feeder line by described the first feeder line, the phase difference of described the first radiofrequency signal and described the second radiofrequency signal is 90 degree.
9. multi-modal communications method according to claim 8, is characterized in that, the transmitting time that described controller is controlled described the first radiofrequency signal and described the second radiofrequency signal according to described phase difference and described length difference comprises:
If described controller detects, know that the phase difference of described the first radiofrequency signal and described the second radiofrequency signal and the length difference of described the first feeder line and described the second feeder line are zero, control 1/4th the odd-multiple in the poor propagation cycle for described the first radiofrequency signal or described the second radiofrequency signal of transmission delay of described the first radiofrequency signal and described the second radiofrequency signal.
10. multi-modal communications method according to claim 9, is characterized in that, the transmitting time that described controller is controlled described the first radiofrequency signal and described the second radiofrequency signal according to described phase difference and described length difference also comprises:
If detecting, described controller knows that the phase difference of described the first radiofrequency signal and described the second radiofrequency signal is zero, and the length difference of described the first feeder line and described the second feeder line is 1/4th odd-multiple of the wavelength of described the first radiofrequency signal or described the second radiofrequency signal, sends described the first radiofrequency signal and described the second radiofrequency signal simultaneously.
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