CN102637961A - Indoor distributed antenna system and multi-mode communication method - Google Patents
Indoor distributed antenna system and multi-mode communication method Download PDFInfo
- Publication number
- CN102637961A CN102637961A CN201210086672XA CN201210086672A CN102637961A CN 102637961 A CN102637961 A CN 102637961A CN 201210086672X A CN201210086672X A CN 201210086672XA CN 201210086672 A CN201210086672 A CN 201210086672A CN 102637961 A CN102637961 A CN 102637961A
- Authority
- CN
- China
- Prior art keywords
- radiofrequency signal
- signal
- radiating aperture
- sent
- radiation module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
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 invention relates to communication technical field, relates in particular to a kind of indoor distributed antenna system and multi-modal communications method.
Background technology
Because the professional proportion of indoor communications increases day by day, in order to improve power system capacity, in indoor GSM, uses multiple-input and multiple-output (Multiple-Input Multiple-Out-put, MIMO) technology.
Present indoor distributed antenna system is supported multiple GSM; With global system for mobile communications (Global System of Mobile Communication, GSM) and Long Term Evolution (Long Term Evolution, LTE) system is an example: when LTE system applies MIMO technology and gsm system not during using MIMO technique; In order to satisfy the needs of the portable terminal of supporting different communication systems; Indoor distributed antenna system mainly is to receive the two-way radiofrequency signal through perpendicular polarization Radiation Module in the dual polarized antenna and horizontal polarization Radiation Module, and 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, and a path radiation signal is a high frequency, and a path radiation signal is a high and low frequency; Thereby, the radiation signal of one road low frequency is provided for the portable terminal of supporting gsm system for the portable terminal of supporting the LTE system provides two-way incoherent high frequency radiation signal.
But; Because the restriction of 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 bigger, causes supporting that the diversity reception effect of portable terminal of LTE system is relatively poor; Support that the portable terminal receptivity of gsm system is unstable, existing indoor distributed antenna system has certain limitation.
Summary of the invention
To the above-mentioned defective of prior art, the embodiment of the invention provides a kind of indoor distributed antenna system and multi-modal communications method.
One aspect of the present invention provides a kind of indoor distributed antenna system, comprising:
Radiofrequency signal processing module, circular polarization radiation module and single polarization Radiation Module; Said circular polarization radiation module comprises first radiating aperture and second radiating aperture; Measure-alike and the position of said first radiating aperture and said second radiating aperture is orthogonal; Said radiofrequency signal processing module is connected with said second radiating aperture with said first radiating aperture respectively, and said single polarization Radiation Module is connected with said radiofrequency signal processing module;
Said radiofrequency signal processing module; Be used to generate first radiofrequency signal, second radiofrequency signal and the 3rd radio frequency signal; Wherein, Said first radiofrequency signal and the said second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and said first radiofrequency signal and said second radiofrequency signal are sent to said circular polarization radiation module, and said the 3rd radio frequency signal is sent to said single polarization Radiation Module;
Said circular polarization radiation module is used for receiving said first radiofrequency signal and sending first radiation signal through said first radiating aperture, and receives said second radiofrequency signal and send second radiation signal through said second radiating aperture;
Said single polarization Radiation Module is used to receive said the 3rd radio frequency signal and sends the 3rd radiation signal.
The present invention provides a kind of multi-modal communications method that indoor distributed antenna system provided by the invention carries out of using on the other hand, comprising:
Said radiofrequency signal processing module generates first radiofrequency signal, second radiofrequency signal and the 3rd radio frequency signal; Wherein, Said first radiofrequency signal and the said second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree; And said first radiofrequency signal and said second radiofrequency signal sent to said circular polarization radiation module, and said the 3rd radio frequency signal is sent to said single polarization Radiation Module;
Said circular polarization radiation module receives said first radiofrequency signal and sends first radiation signal through said first radiating aperture, and receives said second radiofrequency signal and send second radiation signal through said second radiating aperture;
Said single polarization Radiation Module receives said the 3rd radio frequency signal and sends the 3rd radiation signal.
Indoor distributed antenna system that the embodiment of the invention provides and multi-modal communications method; Required two-way constant amplitude equifrequency and the phase difference of the communication system that meets using MIMO that sends through two identical and orthogonal first radiating apertures on the 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 formed the consistent radiation signal of two-way quadrature and coverage in the space; The portable terminal that makes the communication system of supporting using MIMO can both receive the incoherent radiation signal of two-way when in the scope that the signal of correspondence covers, moving, and has good diversity; Also meet not required the penetrating signal and send radiation signal of communication system of using MIMO through what single polarization Radiation Module received RF signal processing module was sent; Make and support to receive corresponding radiation signal when the portable terminal of the communication system of using MIMO does not move in the scope of the signal covering of correspondence, thereby guaranteed to support in the interior space that the portable terminal of different communication systems application model can both carry out reliable communication.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the indoor distributed antenna system of the present invention;
Fig. 2 is the flow chart of the application multi-modal communications method embodiment one that indoor distributed antenna system carried out shown in Figure 1;
Fig. 3 is the structural representation of indoor another embodiment of distributed antenna system of the present invention;
Fig. 4 is the flow chart of the application multi-modal communications method embodiment two that indoor distributed antenna system carried out shown in Figure 3;
Fig. 5 is the structural representation of the another embodiment of the indoor distributed antenna system of the present invention;
Fig. 6 is the flow chart of the application multi-modal communications method embodiment three that indoor distributed antenna system carried out shown in Figure 5.
Embodiment
Fig. 1 is the structural representation of an embodiment of the indoor distributed antenna system of the present invention, and as shown in Figure 1, this system comprises:
Radiofrequency signal processing module 1, circular polarization radiation module 2 and single polarization Radiation Module 3; Circular polarization radiation module 2 comprises first radiating aperture 21 and second radiating aperture 22; Measure-alike and the position of first radiating aperture 21 and second radiating aperture 22 is orthogonal; Radiofrequency signal processing module 1 is connected with first radiating aperture 21, second radiating aperture 22 respectively, and single polarization Radiation Module 3 is connected with radiofrequency signal processing module 1;
Wherein, Radiofrequency signal processing module 1 is used to generate first radiofrequency signal, second radiofrequency signal and the 3rd radio frequency signal; Wherein, First radiofrequency signal and the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and first radiofrequency signal and second radiofrequency signal are sent to first radiating aperture 21 and second radiating aperture 22 on the circular polarization radiation module 2, and the 3rd radio frequency signal is sent to single polarization Radiation Module 3; Circular polarization radiation module 2 is used for receiving first radiofrequency signal and sending first radiation signal through first radiating aperture 21, and receives second radiofrequency signal and send second radiation signal through second radiating aperture 22; Single polarization Radiation Module 3 is used to receive the 3rd radio frequency signal and sends the 3rd radiation signal.
Fig. 2 is the flow chart of the application multi-modal communications method embodiment one that indoor distributed antenna system carried out shown in Figure 1, and this method specifically comprises:
The radiofrequency signal processing module generates according to the real needs of the GSM of using MIMO and meets the two-way radiofrequency signal that MIMO uses required frequency and be respectively first radiofrequency signal and second radiofrequency signal; Wherein, The amplitude of first radiofrequency signal and second radiofrequency signal is identical with frequency, but phase difference is 90 degree.It is understandable that; Because concrete indoor GSM 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, then first radiofrequency signal of radiofrequency signal processing module generation and the frequency of second radiofrequency signal are 2500～2690MHZ.The radiofrequency signal processing module is that first radiofrequency signal and second radiofrequency signal of 90 degree sends to the circular polarization radiation module with constant amplitude equifrequency and phase difference; Need to prove; Those of ordinary skills can be understood that the radiofrequency signal processing module is that first radiofrequency signal and second radiofrequency signal of 90 degree sends to the circular polarization radiation module through two isometric feeder lines with constant amplitude equifrequency and phase difference; Thereby guarantee that first radiofrequency signal is consistent with the transmission path of second radiofrequency signal; When arriving first radiating aperture and second radiating aperture, the phase difference of first radiofrequency signal and second radiofrequency signal still is 90 degree.The radiofrequency signal processing module also generates according to the real needs of the GSM of using MIMO not and meets the 3rd radio frequency signal of respective frequencies, and sends to the single polarization Radiation Module.
Step 101, the circular polarization radiation module receives first radiofrequency signal and sends first radiation signal through first radiating aperture, and receives second radiofrequency signal and send second radiation signal through second radiating aperture;
Comprise first radiating aperture and second radiating aperture on the circular polarization radiation module, the size and the structural manufacturing process of first radiating aperture and second radiating aperture are identical, and first radiating aperture and second radiating aperture are orthogonal.It should be noted that what one of ordinary skill in the art will appreciate that is that the size of radiating aperture on the circular polarization radiation module is according to the needed frequency of using MIMO in the indoor GSM and concrete the setting.The circular polarization radiation module receives first radiofrequency signal through first radiating aperture; And receive second radiofrequency signal through second radiating aperture; First radiating aperture sends first radiation signal to the interior space after receiving first radiofrequency signal, second radiating aperture sends second radiation signal to the interior space after receiving second radiofrequency signal.Because first radiofrequency signal and the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree; And first radiating aperture is vertical each other with second radiating aperture; Therefore; The electric field intensity of first radiation signal and second radiation signal is spatially orthogonal and have isolation, thereby first radiation signal and second radiation signal have irrelevance.Because the size and the structural manufacturing process of first radiating aperture and second radiating aperture are identical, and are positioned on the same circular polarization radiation module, therefore, the radiation scope of first radiation signal and second radiation signal is spatially in full accord.Thereby in the process that the portable terminal of supporting the communication system of using MIMO moves in the signal cover of correspondence; All the time can receive the incoherent radiation signal of two-way of circular polarization radiation module through first radiating aperture and the second radiating aperture radiation; Can obtain good diversity reception effect, using MIMO to greatest extent in indoor GSM.
The single polarization Radiation Module receives the 3rd radio frequency signal and sends the 3rd radiation signal to the interior space, communicates thereby can receive corresponding radiation signal in the process of supporting the portable terminal of the communication system of using MIMO in the signal cover of correspondence, to move.
Need to prove; What one of ordinary skill in the art will appreciate that is that circular polarization radiation module in the embodiment of the 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 first radiating aperture and second radiating aperture all can be carried out the function of circular polarization radiation module in the embodiment of the invention; The single polarization Radiation Module comprises: horizontal polarization Radiation Module and perpendicular polarization Radiation Module, the embodiment of the invention does not limit this.
Therefore; Compared with prior art; The indoor distributed antenna system that present embodiment provides and use the multi-modal communications method that this indoor distributed antenna system carries out; Be the radiofrequency signal of 90 degree and send radiation signal through required two-way constant amplitude equifrequency and the phase difference of the communication system that meets using MIMO that two isometric feeder lines send through two identical and orthogonal first radiating apertures on the circular polarization radiation module and the second radiating aperture received RF signal processing module; Thereby formed the consistent radiation signal of two-way quadrature and coverage in the space; The portable terminal that makes the communication system of supporting using MIMO can both receive the incoherent radiation signal of two-way when in the scope that the signal of correspondence covers, moving, and has good diversity reception effect; Also meet not required the penetrating signal and send radiation signal of communication system of using MIMO through what single polarization Radiation Module received RF signal processing module was sent; Make and support to receive corresponding radiation signal when the portable terminal of the communication system of using MIMO does not move in the scope of the signal covering of correspondence, thereby guaranteed to support the portable terminal of different communication systems application model can both carry out reliable communication.
Fig. 3 is the structural representation of indoor another embodiment of distributed antenna system of the present invention; As shown in Figure 3, based on embodiment illustrated in fig. 1, radiofrequency signal processing module 1 comprises: remote radio unit (RRU) 11, splitter 12, phase shifter 13; Wherein, Remote radio unit (RRU) 11 links to each other with phase shifter 13 with splitter 12 respectively, and splitter 12 links to each other with phase shifter 13 with single polarization Radiation Module 3 respectively, and phase shifter 13 links to each other with second radiating aperture 22 with first radiating aperture 21 respectively;
Wherein, remote radio unit (RRU) 11 is used to generate first radiofrequency signal and the 4th radiofrequency signal, and first radiofrequency signal is sent to phase shifter 13, and the 4th radiofrequency signal is sent to splitter 12; Splitter 12 is used for that the 4th radiofrequency signal is carried out shunt and handles generation second radiofrequency signal and the 3rd radio frequency signal; Make second radiofrequency signal and the first radiofrequency signal equifrequency constant amplitude; And second radiofrequency signal sent to phase shifter 13, the 3rd radio frequency signal is sent to single polarization Radiation Module 3; Phase shifter 13 is used for first radiofrequency signal and/or second radiofrequency signal are carried out the phase shift processing; The phase difference that makes first radiofrequency signal and second radiofrequency signal is 90 degree; And first radiofrequency signal sent to first radiating aperture 21, second radiofrequency signal is sent to second radiating aperture 22.
Fig. 4 is the flow chart of the application multi-modal communications method embodiment two that indoor distributed antenna system carried out shown in Figure 3; As shown in Figure 4; With the LTE system of using MIMO and not the gsm system of using MIMO be the processing procedure that example specifies this indoor distributed antenna system, this method specifically comprises:
Remote radio unit (RRU) carries out modulation treatment to the base band light signal that receives; Thereby generate first radiofrequency signal and the 4th radiofrequency signal that meet LTE system and gsm system; Wherein, first radiofrequency signal is a 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 with first radiofrequency signal, and the 4th radiofrequency signal is sent to splitter.
The frequency that splitter is provided with the LTE system of using MIMO in advance is the frequency of first radiofrequency signal; Therefore; Splitter carries out shunt according to this frequency preset to the 4th radiofrequency signal and handles generation second radiofrequency signal and the 3rd radio frequency signal; Making second radiofrequency signal and the first radiofrequency signal equifrequency is that the amplitude of high-frequency signal and second radiofrequency signal and first radiofrequency signal is identical, and the 3rd radio frequency signal is a low frequency signal.Splitter sends to phase shifter with second radiofrequency signal, and the 3rd radio frequency signal is sent to the single polarization Radiation Module.
The single polarization Radiation Module sends the 3rd radiation signal to the interior space after receiving the 3rd radio frequency signal, thereby the low frequency signal that can obtain the radiation of single polarization Radiation Module when supporting the portable terminal of gsm system in the signal cover of correspondence, to move in the interior space communicates.
Phase shifter is after receiving first radiofrequency signal and second radiofrequency signal; Phase place according to first radiofrequency signal and second radiofrequency signal is carried out the phase shift processing to first radiofrequency signal and/or second radiofrequency signal; The phase difference that makes first radiofrequency signal and second radiofrequency signal is 90 degree; And first radiofrequency signal sent to first radiating aperture, and second radiofrequency signal is sent to second radiating aperture, need to prove; Those of ordinary skills can be understood that phase shifter is that first radiofrequency signal and second radiofrequency signal of 90 degree sends to the circular polarization radiation module through two isometric feeder lines with constant amplitude equifrequency and phase difference; Thereby guarantee that first radiofrequency signal is identical with the transmission path of second radiofrequency signal, when arriving first radiating aperture and second radiating aperture, phase difference still is 90 degree.
Step 204, the circular polarization radiation module receives first radiofrequency signal and sends first radiation signal through first radiating aperture, and receives second radiofrequency signal and send second radiation signal through second radiating aperture.
The circular polarization radiation module is sent first radiation signal to the interior space through first radiating aperture after receiving first radiofrequency signal, after receiving second radiofrequency signal, send second radiation signal to the interior space through second radiating aperture.Because first radiofrequency signal and the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree; And first radiating aperture is vertical each other with second radiating aperture; Therefore; The electric field intensity of first radiation signal and second radiation signal is spatially orthogonal and have isolation, thereby first radiation signal and second radiation signal have irrelevance.Because the size and the structural manufacturing process of first radiating aperture and second radiating aperture are identical, and are positioned on the same circular polarization radiation module, therefore, the radiation scope of first radiation signal and second radiation signal is spatially in full accord.Thereby in the process that the portable terminal of supporting the LTE system moves in the signal cover of correspondence; All the time can receive the incoherent radiation signal of two-way of circular polarization radiation module through first radiating aperture and the second radiating aperture radiation; Can obtain good diversity, using MIMO to greatest extent in indoor GSM.
The indoor distributed antenna system that present embodiment provides and use the multi-modal communications method that this indoor distributed antenna system carries out; Receiving two-way constant amplitude equifrequency and the phase difference handled through phase shifter through two identical and orthogonal first radiating apertures on the circular polarization radiation module and second radiating aperture through feeder line is the radiofrequency signal of 90 degree and sends radiation signal; Thereby formed the consistent radiation signal of two-way quadrature and coverage in the space; Can both receive the incoherent radiation signal of two-way when the portable terminal of supporting the LTE system is moved in the scope of the signal covering of correspondence, have good diversity reception effect; Also receive through splitter and handle the radiation signal that send the back through the single polarization Radiation Module; Can receive corresponding radiation signal when the portable terminal of supporting gsm system is moved and communicate in the scope of the signal covering of correspondence, thereby guarantee to support in the interior space that the portable terminal of different communication systems application model can both carry out reliable communication.
Fig. 5 is the structural representation of the another embodiment of the indoor distributed antenna system of the present invention; As shown in Figure 5, 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 to the circular polarization radiation module in embodiment illustrated in fig. 1.As shown in Figure 5; This system comprises: radiofrequency 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 first radiating aperture 41, second radiating aperture 42, the 3rd radiating aperture 43 and the 4th radiating aperture 44; First radiating aperture 41 and the 3rd radiating aperture 43 are parallel to each other; Second radiating aperture 42 and the 4th radiating aperture 44 are parallel to each other, and first radiating aperture 41 is identical orthogonal with second radiating aperture 42, and the 3rd radiating aperture 43 is vertical each other with the 4th radiating aperture 44.Radiofrequency signal processing module 1 specifically comprises: remote radio unit (RRU) 11, splitter 12, controller 14, first feeder line 15 and second feeder line 16; Remote radio unit (RRU) 11 links to each other with controller 14 with splitter 12 respectively, and splitter 12 is connected with controller 14 with perpendicular polarization Radiation Module 5 respectively; Controller 14 links to each other with first radiating aperture 41 through first feeder line 15, and links to each other with second radiating aperture 42 through second feeder line 16;
Wherein, remote radio unit (RRU) 11 is used to generate first radiofrequency signal and the 4th radiofrequency signal, and first radiofrequency signal is sent to controller 14, and the 4th radiofrequency signal is sent to splitter 12; Splitter 12 is used for that the 4th radiofrequency signal is carried out shunt and handles generation second radiofrequency signal and the 3rd radio frequency signal; Make second radiofrequency signal and the first radiofrequency signal constant amplitude equifrequency; And second radiofrequency signal sent to controller 14, the 3rd radio frequency signal is sent to perpendicular polarization Radiation Module 5; Controller 14 is used for controlling according to the length difference of the phase difference of first radiofrequency signal and second radiofrequency signal and first feeder line 15 and second feeder line 16 transmitting time of first radiofrequency signal and second radiofrequency signal; So that first radiofrequency signal is when being transferred to first radiating aperture 41 and second radiofrequency signal and being transferred to second radiating aperture 42 through second feeder line 16 through first feeder line 15, the phase difference of first radiofrequency signal and second radiofrequency signal is 90 degree.
Fig. 6 is the flow chart of the application multi-modal communications method embodiment three that indoor distributed antenna system carried out shown in Figure 5, and as shown in Figure 3, this method specifically comprises:
Remote radio unit (RRU) carries out modulation treatment to the base band light signal that receives, and meets first radiofrequency signal and the 4th radiofrequency signal that multi-mode communication system is used thereby generate, and wherein, first radiofrequency signal is narrow frequency signal, and the 4th radiofrequency signal is a broadband signal.Remote radio unit (RRU) sends to phase shifter with first radiofrequency signal, and the 4th radiofrequency signal is sent to splitter.
The frequency that splitter is provided with the communication system of using MIMO in advance is the frequency and the amplitude of first radiofrequency signal; Therefore; Splitter carries out shunt processing generation second radiofrequency signal and the 3rd radio frequency signal according to this frequency preset and amplitude to the 4th radiofrequency signal; Making second radiofrequency signal and the first radiofrequency signal equifrequency is narrow frequency signal and to make second radiofrequency signal identical with the amplitude of first radiofrequency signal, and the 3rd radio frequency signal is to meet the not signal of the communication system of using MIMO.Splitter sends to phase shifter with second radiofrequency signal, and the 3rd radio frequency signal is sent to the perpendicular polarization Radiation Module.
The perpendicular polarization Radiation Module sends the 3rd radiation signal to the interior space after receiving the 3rd radio frequency signal, thereby supports the signal that can obtain the radiation of perpendicular polarization Radiation Module in the signal cover of correspondence when the portable terminal of using MIMO does not move to communicate in the interior space.
Controller detects the phase place of first radiofrequency signal and second radiofrequency signal, thereby obtains the phase difference of first radiofrequency signal and second radiofrequency signal.Controller detects the length of first feeder line and second feeder line, thereby obtains the length difference of first feeder line and second feeder line.Need to prove 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 the test of software test and hardware circuit.Controller can repeat no more through modes such as physical measurement, signal passbacks to the detection mode of feeder line length here.
Because first radiofrequency signal is identical with the frequency of second radiofrequency signal; So the wavelength of first radiofrequency signal and second radiofrequency signal is identical with the propagation cycle; Because first radiofrequency signal is through the transmission of first feeder line, second radiofrequency signal is through the transmission of second feeder line, therefore; The length of first feeder line is the transmission path of first radiofrequency signal, and the length of second feeder line is the transmission path of second radiofrequency signal.Controller is according to detecting first radiofrequency signal and the phase difference of second radiofrequency signal and the length difference of first feeder line and second feeder line that is obtained; Each phase cycling of reference sine wave is 2 π; If change 90 ° phase place; Be π/4, then the transmission time shifts to an earlier date or hysteresis T/4, and promptly transmission path increases or reduce l/4; The delay inequality of sending first radiofrequency signal and second radiofrequency signal is obtained in calculating; Thereby control the transmitting time of first radiofrequency signal and second radiofrequency signal, so that first radiofrequency signal is when being transferred to first radiating aperture and second radiofrequency signal and being transferred to second radiating aperture through second feeder line through first feeder line, the phase difference of first radiofrequency signal and second radiofrequency signal is 90 degree.
For how clearer explanation controller obtains the delay inequality of first radiofrequency signal and second radiofrequency signal according to the length difference of the phase difference of first radiofrequency signal and second radiofrequency signal and first feeder line and second feeder line, be that example describes with several kinds of simple application scenarioss.Such as: controller is if detection knows that the phase difference of first radiofrequency signal and second radiofrequency signal and the length difference of first feeder line and second feeder line are zero; Explain that the phase place of first radiofrequency signal and second radiofrequency signal is identical and transmission path is identical, the transmission delay difference of then controlling first radiofrequency signal and second radiofrequency signal is 1/4th the odd in the propagation cycle of first radiofrequency signal or second radiofrequency signal.Controller is zero if detect the phase difference of knowing first radiofrequency signal and second radiofrequency signal; And the length difference of first feeder line and second feeder line is 1/4th a odd of the wavelength of first radiofrequency signal or second radiofrequency signal; Explain that the identical and transmission path of the phase place of first radiofrequency signal and second radiofrequency signal differs the phase difference of 90 degree, then sends first radiofrequency signal and second radiofrequency signal simultaneously.
Comprise four sizes and the identical radiating aperture of structural manufacturing process on the microband paste circular polarization radiation module; And first is parallel with the 3rd radiating aperture; Second is parallel with the 4th radiating aperture, and first and second radiating apertures are orthogonal, and 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 on the circular polarization radiation module is according to the needed frequency of using MIMO in the indoor GSM and concrete the setting.
Microband paste circular polarization radiation module receives first radiofrequency signal through first radiating aperture; And receive second radiofrequency signal through second radiating aperture; First radiating aperture sends first radiation signal through the first and the 3rd radiating aperture to the interior space after receiving first radiofrequency signal, second radiating aperture sends second radiation signal through the second and the 4th radiating aperture to the interior space after receiving second radiofrequency signal.Because first radiofrequency signal and the second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree; And first radiating aperture is vertical each other with second radiating aperture; Therefore; The electric field intensity of first radiation signal and second radiation signal is spatially orthogonal and have isolation, thereby first radiation signal and second radiation signal have irrelevance.Because the size and the structural manufacturing process of four radiating apertures are identical, and are positioned on the same microband paste circular polarization radiation module, therefore, the radiation scope of first radiation signal and second radiation signal is spatially in full accord.Thereby in the process that indoor portable 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 GSM.It should be noted that present embodiment also can carry out the function of above-mentioned first radiating aperture and second radiating aperture through orthogonal the 3rd radiating aperture and the 4th radiating aperture, repeat no more here.
The indoor distributed antenna system that present embodiment provides and use the multi-modal communications method that this indoor distributed antenna system carries out; Receive the radiofrequency signal of sending through feeder line through two identical and orthogonal first radiating apertures on the microband paste circular polarization radiation module and second radiating aperture through controller; Thereby formed the consistent radiation signal of two-way quadrature and coverage in the space; Can both receive the incoherent radiation signal of two-way when the portable terminal of supporting MIMO to use is moved in the scope of the signal covering of correspondence, have good diversity reception effect; Also receive through splitter and handle the radiation signal that send the back through the perpendicular polarization Radiation Module; Make and support that can receive corresponding radiation signal when the portable terminal of the system of using MIMO does not move in the scope of the signal covering of correspondence communicates, thereby guaranteed to support in the interior space that the portable 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 be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (10)
1. an indoor distributed antenna system is characterized in that, comprising:
Radiofrequency signal processing module, circular polarization radiation module and single polarization Radiation Module; Said circular polarization radiation module comprises first radiating aperture and second radiating aperture; Measure-alike and the position of said first radiating aperture and said second radiating aperture is orthogonal; Said radiofrequency signal processing module is connected with said second radiating aperture with said first radiating aperture respectively, and said single polarization Radiation Module is connected with said radiofrequency signal processing module;
Said radiofrequency signal processing module; Be used to generate first radiofrequency signal, second radiofrequency signal and the 3rd radio frequency signal; Wherein, Said first radiofrequency signal and the said second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree, and said first radiofrequency signal and said second radiofrequency signal are sent to said circular polarization radiation module, and said the 3rd radio frequency signal is sent to said single polarization Radiation Module;
Said circular polarization radiation module is used for receiving said first radiofrequency signal and sending first radiation signal through said first radiating aperture, and receives said second radiofrequency signal and send second radiation signal through said second radiating aperture;
Said single polarization Radiation Module is used to receive said the 3rd radio frequency signal and sends the 3rd radiation signal.
2. indoor distributed antenna system according to claim 1 is characterized in that, said radiofrequency signal processing module comprises:
Remote radio unit (RRU), splitter and phase shifter; Wherein, Said remote radio unit (RRU) links to each other with said phase shifter with said splitter respectively; Said splitter is connected with said phase shifter with said single polarization Radiation Module respectively, and said phase shifter links to each other with said second radiating aperture with said first radiating aperture respectively;
Said remote radio unit (RRU) is used to generate first radiofrequency signal and the 4th radiofrequency signal, and said first radiofrequency signal is sent to said phase shifter, and said the 4th radiofrequency signal is sent to said splitter;
Said splitter; Be used for that said the 4th radiofrequency signal is carried out shunt and handle generation second radiofrequency signal and the 3rd radio frequency signal; Make second radiofrequency signal and the said first radiofrequency signal constant amplitude equifrequency; And said second radiofrequency signal sent to said phase shifter, said the 3rd radio frequency signal is sent to said single polarization Radiation Module;
Said phase shifter; Be used for said first radiofrequency signal and/or said second radiofrequency signal are carried out the phase shift processing; The phase difference that makes said first radiofrequency signal and said second radiofrequency signal is 90 degree; And said first radiofrequency signal sent to said first radiating aperture, said second radiofrequency signal is sent to said second radiating aperture.
3. indoor distributed antenna system according to claim 1 is characterized in that, said radiofrequency signal processing module comprises:
Remote radio unit (RRU), splitter, controller, first feeder line and second feeder line, wherein, said remote radio unit (RRU) links to each other with said controller with said splitter respectively, and said splitter is connected with said controller with said single polarization Radiation Module respectively;
Said controller links to each other with said first radiating aperture through said first feeder line, and links to each other with said second radiating aperture through said second feeder line;
Said remote radio unit (RRU) is used to generate first radiofrequency signal and the 4th radiofrequency signal, and said first radiofrequency signal is sent to said controller, and said the 4th radiofrequency signal is sent to said splitter;
Said splitter; Be used for that said the 4th radiofrequency signal is carried out shunt and handle generation second radiofrequency signal and the 3rd radio frequency signal; Make second radiofrequency signal and the said first radiofrequency signal constant amplitude equifrequency; And said second radiofrequency signal sent to said controller, said the 3rd radio frequency signal is sent to said single polarization Radiation Module;
Said controller; Be used for controlling the transmitting time of said first radiofrequency signal and said second radiofrequency signal according to the length difference of the phase difference of said first radiofrequency signal and said second radiofrequency signal and said first feeder line and said second feeder line; So that said first radiofrequency signal is when being transferred to said first radiating aperture and said second radiofrequency signal and being transferred to said second radiating aperture through said second feeder line through said first feeder line, the phase difference of said first radiofrequency signal and said second radiofrequency signal is 90 degree.
4. according to each described indoor distributed antenna system of claim 1-3, it is characterized in that,
Said circular polarization radiation module is microband paste circular polarization radiation module or spiral circle polarized radiation module.
5. according to each described indoor distributed antenna system of claim 1-3, it is characterized in that said single polarization Radiation Module is perpendicular polarization Radiation Module or horizontal polarization Radiation Module.
6. use the multi-modal communications method that indoor distributed antenna system as claimed in claim 1 carries out for one kind, it is characterized in that, comprising:
Said radiofrequency signal processing module generates first radiofrequency signal, second radiofrequency signal and the 3rd radio frequency signal; Wherein, Said first radiofrequency signal and the said second radiofrequency signal constant amplitude equifrequency and phase difference are 90 degree; And said first radiofrequency signal and said second radiofrequency signal sent to said circular polarization radiation module, and said the 3rd radio frequency signal is sent to said single polarization Radiation Module;
Said circular polarization radiation module receives said first radiofrequency signal and sends first radiation signal through said first radiating aperture, and receives said second radiofrequency signal and send second radiation signal through said second radiating aperture;
Said single polarization Radiation Module receives said the 3rd radio frequency signal and sends the 3rd radiation signal.
7. multi-modal communications method according to claim 6 is characterized in that, said radiofrequency signal processing module comprises: remote radio unit (RRU), splitter and phase shifter,
Said remote radio unit (RRU) generates first radiofrequency signal and the 4th radiofrequency signal, and said first radiofrequency signal is sent to said phase shifter, and said the 4th radiofrequency signal is sent to said splitter;
Said splitter carries out shunt to said the 4th radiofrequency signal and handles generation second radiofrequency signal and the 3rd radio frequency signal; Make second radiofrequency signal and the said first radiofrequency signal constant amplitude equifrequency; And said second radiofrequency signal sent to said phase shifter, said the 3rd radio frequency signal is sent to said single polarization Radiation Module;
Said phase shifter carries out the phase shift processing to said first radiofrequency signal and/or said second radiofrequency signal; The phase difference that makes said first radiofrequency signal and said second radiofrequency signal is 90 degree; And said first radiofrequency signal sent to said first radiating aperture, said second radiofrequency signal is sent to said second radiating aperture.
8. multi-modal communications method according to claim 6 is characterized in that, said radiofrequency signal processing module comprises: remote radio unit (RRU), splitter, controller, first feeder line and second feeder line,
Said remote radio unit (RRU) generates first radiofrequency signal and the 4th radiofrequency signal, and said first radiofrequency signal is sent to said controller, and said the 4th radiofrequency signal is sent to said splitter;
Said splitter carries out shunt to said the 4th radiofrequency signal and handles generation second radiofrequency signal and the 3rd radio frequency signal; Make second radiofrequency signal and the said first radiofrequency signal constant amplitude equifrequency; And said second radiofrequency signal sent to said controller, said the 3rd radio frequency signal is sent to said single polarization Radiation Module;
Said controller detects the phase difference of said first radiofrequency signal and said second radiofrequency signal and the length difference of said first feeder line and said second feeder line;
Said controller is controlled the transmitting time of said first radiofrequency signal and said second radiofrequency signal according to said phase difference and said length difference; So that said first radiofrequency signal is when being transferred to said first radiating aperture and said second radiofrequency signal and being transferred to said second radiating aperture through said second feeder line through said first feeder line, the phase difference of said first radiofrequency signal and said second radiofrequency signal is 90 degree.
9. multi-modal communications method according to claim 8 is characterized in that, the transmitting time that said controller is controlled said first radiofrequency signal and said second radiofrequency signal according to said phase difference and said length difference comprises:
Said controller is if detect the phase difference know said first radiofrequency signal and said second radiofrequency signal and the length difference of said first feeder line and said second feeder line is zero, and the transmission delay difference of then controlling said first radiofrequency signal and said second radiofrequency signal is 1/4th the odd in the propagation cycle of said first radiofrequency signal or said second radiofrequency signal.
10. multi-modal communications method according to claim 9 is characterized in that, the transmitting time that said controller is controlled said first radiofrequency signal and said second radiofrequency signal according to said phase difference and said length difference also comprises:
Said controller is zero if detect the phase difference of knowing said first radiofrequency signal and said second radiofrequency signal; And the length difference of said first feeder line and said second feeder line is 1/4th a odd of the wavelength of said first radiofrequency signal or said second radiofrequency signal, then sends said first radiofrequency signal and said second radiofrequency signal simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210086672.XA CN102637961B (en) | 2012-03-28 | 2012-03-28 | Indoor distributed antenna system and multi-mode communication method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210086672.XA CN102637961B (en) | 2012-03-28 | 2012-03-28 | Indoor distributed antenna system and multi-mode communication method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102637961A true CN102637961A (en) | 2012-08-15 |
| CN102637961B CN102637961B (en) | 2014-03-05 |
Family
ID=46622262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210086672.XA Active CN102637961B (en) | 2012-03-28 | 2012-03-28 | Indoor distributed antenna system and multi-mode communication method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102637961B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048911A (en) * | 2019-12-02 | 2020-04-21 | 成都瑞迪威科技有限公司 | Phased array antenna capable of realizing random polarization switching |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101536354A (en) * | 2006-11-14 | 2009-09-16 | 艾利森电话股份有限公司 | An antenna with an improved radiation pattern |
| CN101849369A (en) * | 2007-09-05 | 2010-09-29 | 诺基亚西门子通信公司 | Adaptive adjustment of an antenna arrangement for exploiting polarization and/or beamforming separation |
| CN101997591A (en) * | 2009-08-10 | 2011-03-30 | 雷凌科技股份有限公司 | Wireless transceiver, multi-input multi-output wireless communication system and method |
| CN102055064A (en) * | 2009-10-30 | 2011-05-11 | 雷凌科技股份有限公司 | Circularly polarized antenna in MIMO wireless communication system |
| CN102138251A (en) * | 2008-08-28 | 2011-07-27 | 爱立信电话股份有限公司 | Antenna arrangement for interference reduction and MIMO communication |
-
2012
- 2012-03-28 CN CN201210086672.XA patent/CN102637961B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101536354A (en) * | 2006-11-14 | 2009-09-16 | 艾利森电话股份有限公司 | An antenna with an improved radiation pattern |
| CN101849369A (en) * | 2007-09-05 | 2010-09-29 | 诺基亚西门子通信公司 | Adaptive adjustment of an antenna arrangement for exploiting polarization and/or beamforming separation |
| CN102138251A (en) * | 2008-08-28 | 2011-07-27 | 爱立信电话股份有限公司 | Antenna arrangement for interference reduction and MIMO communication |
| CN101997591A (en) * | 2009-08-10 | 2011-03-30 | 雷凌科技股份有限公司 | Wireless transceiver, multi-input multi-output wireless communication system and method |
| CN102055064A (en) * | 2009-10-30 | 2011-05-11 | 雷凌科技股份有限公司 | Circularly polarized antenna in MIMO wireless communication system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111048911A (en) * | 2019-12-02 | 2020-04-21 | 成都瑞迪威科技有限公司 | Phased array antenna capable of realizing random polarization switching |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102637961B (en) | 2014-03-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102683900B (en) | Multi-input multi-output antenna system and multi-input multi-output method | |
| US20140192845A1 (en) | Method and Apparatus For an Adaptive Multi-Antenna System | |
| US11251882B2 (en) | Device and method for calibrating phased array antenna | |
| EP2586136A2 (en) | A method and device for obtaining precoding matrix | |
| CN102637963B (en) | Indoor distributed antenna system and multiple input multiple output method | |
| WO2017023466A1 (en) | Apparatus, system and method of single-user (su) multi-in-multi-out (mimo) communication | |
| CN104617391A (en) | Method and device for adjusting antenna directional pattern | |
| CN106464389A (en) | Antenna testing apparatus, system and method, and related device | |
| CN106785449A (en) | The reconfigurable method of antenna radiation pattern, antenna assembly and Wireless Telecom Equipment | |
| US9583828B2 (en) | Apparatus, system and method of controlling one or more antennas of a mobile device | |
| US20210359805A1 (en) | Transmission of reference signals from a terminal device | |
| CN102780522B (en) | A kind of aerial array, based on the communication system of this aerial array and communication means | |
| CN102637961B (en) | Indoor distributed antenna system and multi-mode communication method | |
| CN108988913B (en) | A kind of antenna terminal mapping method and the network equipment | |
| KR20230004441A (en) | Antenna array control method and system | |
| EP3699612A1 (en) | Method for performing a radiated two-stage method measurement as well as measurement setup | |
| US20230261766A1 (en) | Methods and equipments for locking transmission state | |
| CN114976637A (en) | Antenna control method, antenna module and communication equipment | |
| JP6243830B2 (en) | Information terminal and wireless communication method | |
| CN102664649B (en) | Radiofrequency front-end module, wireless access network equipment and method for controlling same | |
| CN102664670B (en) | Uplink signal reception control method of intelligent antenna, device and wireless access point | |
| US20200395981A1 (en) | Transmission of reference signals from a terminal device | |
| Khaleghi et al. | Wireless backscatter communication using multiple transmitter scheme | |
| US8848772B2 (en) | Device, system and method of phase quantization for phased array antenna | |
| US9391367B2 (en) | Apparatus, system and method of steering an antenna array |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |