CN105306113A - Multi-input multi-output system and implementation method thereof - Google Patents
Multi-input multi-output system and implementation method thereof Download PDFInfo
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- CN105306113A CN105306113A CN201410320578.5A CN201410320578A CN105306113A CN 105306113 A CN105306113 A CN 105306113A CN 201410320578 A CN201410320578 A CN 201410320578A CN 105306113 A CN105306113 A CN 105306113A
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Abstract
The invention relates to a multi-input multi-output system and an implementation method thereof, wherein the method comprises the following steps: respectively combining a signal from the output end of each antenna of a multi-antenna communication system with a signal from the output end of an antenna of another communication system; and taking each combined signal as a signal source, respectively inputting the signal source in various floor branch antennas of an indoor distribution system, wherein the signal source input into any floor branch antenna is different from the signal source input into one or two floor branch antennas in adjacent floors, and implementing double flow by utilizing a single-channel indoor distribution system. According to the invention, the multi-input multi-output system is implemented in the indoor distribution system with the relatively low cost.
Description
Technical field
The disclosure relates to MIMO (MultipleInputMultipleOutput, multiple-input and multiple-output) field, especially, relates to a kind of multi-input multi-output system and its implementation.
Background technology
Within 2014, will be the first year of LTE (LongTermEvolution, Long Term Evolution) network, be also a year of LTE network great development.Along with the development of mobile Internet, Mobile data flow presents the trend of explosive growth, and relevant statistics shows, have 70% ~ 80% to occur in indoor environment in mobile data services, therefore in-door covering is the emphasis that in recent and following a period of time, operator pays close attention to.In order to promote in-door covering effect, accelerate networking progress, each operator organizes the work of indoor distribution reform strengthening energetically, and the contention of indoor flow becomes the focus of each large carriers vie.
But, there is following problem in current FenLTEHe road, room:
1, simple conjunction road Problems existing
Current most of LTE room combiner all adopts simple conjunction road mode, that is, only at trunk, LTE signal is closed road to compartment system, that is, identical running time-frequency resource transmits a road signal to user.This mode engineering construction is simple, cost is low, is that transformation prevailing model is divided in current LTE room, but there are the following problems simply to close road:
(1) user awareness is poor
MIMO is one of core technology of LTE, LTE utilizes MIMO technology to realize double-stream mode, namely, identical running time-frequency resource transmits the orthogonal signal of two-way to user or utilizes identical running time-frequency resource to be two user's services simultaneously, utilize this principle, the data rate of eating dishes without rice or wine and network capacity promote one times.
At present, in LTE network construction, outdoor station all adopts 2T2R (that is, 2 tunnels receptions are launched on 2 tunnels) or 2T4R etc., MIMO is achieved in outdoor, but room is divided simple when closing road, although due to simple close road mode under every floor have many antennas, some ports of what they connect is all equipment, namely only containing a signal branch, the signal sent is all identical signal, and autocorrelation is strong, and orthogonality is poor, propogator matrix order is 1, therefore cannot realize MIMO.That is, can more than 100Mbps being reached at outdoor user's Theoretical Rate, reducing half once entering indoor speed, bring experience inconsistent to operation later, certainly will cause user awareness when future opens net and have a strong impact on.
(2) network investment efficiency-cost ratio is low
Current each manufacturer LTE equipment all can realize MIMO, and equipment possesses double-current ability, but when simply closing road, owing to realizing MIMO, the potentiality of equipment cannot fully be excavated, capacity waste half.
Illustrate with 20M bandwidth FDD (FrequencyDivisionDuplex, Frequency Division Duplexing (FDD))-LTE, single current theoretical throughput is 79.63Mbps, and double-current theoretical throughput is 152.88Mbps.When user develops into a certain degree to network capacity, namely throughput has had requirement, reach the throughput identical with double fluid, when double fluid cannot be realized, only way increases carrier frequency exactly, namely realize identical throughput by the bandwidth of 40M, capacity that thus can only be identical by the equipment guarantee doubled, which increase equipment investment cost, waste valuable frequency resource, network investment efficiency-cost ratio is low.
2, conventional double fluid transforms Problems existing at present
Current room divides the transformation of LTE double fluid to mainly contain two kinds of modes: build two-way room subsystem and frequency shift technique, but there are the following problems for these two kinds of reforming modes:
(1) property coordination difficulty is large
Divide to be due to current room and transform on point basis, former C solarium, former C solarium divides the property being maturation, when dividing transformation in LTE room, to coordinate difficulty large for property, unlikely transform former room subsystem as two-way room to divide, frequency shift mode installs and uses active antenna due to needs, need during transformation to destroy original industry finishing, substantially cannot realize.
(2) two-way room divides improvement cost high
Former C net single channel room will be divided and be transformed into two-way room and divide, expense is suitable with newly-built a set of room subsystem, and construction cost is unacceptable.
Frequency shift mode needs to change room and divides all antennas, and construction cost and difficulty of construction are all larger.
(3) the reform strengthening cycle is long
Two-way room divides transformation and frequency shift mode transformation because workload is large, the construction period is long, can not meeting the market requirement under the condition of current network Large scale construction.
Summary of the invention
The disclosure proposes new technical scheme in view of at least one in above problem.
The disclosure provides a kind of implementation method of multi-input multi-output system in one, and it achieves multi-input multi-output system at indoor distributed system at lower cost.
The disclosure provides a kind of multi-input multi-output system on the other hand at it, and it achieves multi-input multi-output system at indoor distributed system at lower cost.
According to the disclosure, a kind of implementation method of multi-input multi-output system is provided, comprises:
The signal of the every root antenna output end from multiple antenna communication is carried out conjunction road with the signal of another communication system antenna output respectively;
Conjunction Hou Mei road, road signal is inputed to respectively each floor branch antenna of indoor distributed system as information source, the information source inputing to arbitrary floor branch antenna is different from the information source of the one deck inputed in its contiguous floors or two-layer branch antenna, realizes double fluid to utilize single channel indoor distributed system.
In embodiments more of the present disclosure, the method also comprises:
Judge whether the loss that signal penetrates floor is greater than setting threshold;
If be greater than setting threshold, then before carrying out closing road, the signal weighting of the multiple antennas output of multiple antenna communication is mixed into two-way orthogonal signalling.
In embodiments more of the present disclosure, multiple antenna communication is the LTE system of FDD or TDD standard, and another communication system is other mobile communication system except LTE system.
In embodiments more of the present disclosure, between the antenna of each floor branch road of indoor distributed system, be in vertical isolation state.
In embodiments more of the present disclosure, when multiple antenna communication comprises two transmit antennas, conjunction road Hou mono-tunnel information source is inputed to the antenna of the odd floors branch road of indoor distributed system, the antenna of the even floors branch road of another road information source input indoor distributed system behind road will be closed.
In embodiments more of the present disclosure, the step that the signal weighting of the multiple antennas output of multiple antenna communication is mixed into two-way orthogonal signalling is comprised:
Be separated according to different proportion by the signal of coupler by each antenna output end of multiple antenna communication;
Will from the isolated signal plus of different antennae output to form two-way orthogonal signalling.
According to the disclosure, additionally provide a kind of multi-input multi-output system, comprise multiple antenna communication and mixer, wherein,
The signal of the every root antenna output end from multiple antenna communication is carried out conjunction road with the signal of another communication system antenna output by mixer respectively, conjunction Hou Mei road, road signal is inputed to respectively each floor branch antenna of indoor distributed system as information source, wherein, the information source inputing to arbitrary floor branch antenna is different from the information source of the one deck inputed in its contiguous floors or two-layer branch antenna, realizes double fluid to utilize single channel indoor distributed system.
In embodiments more of the present disclosure, multi-input multi-output system also comprises:
Judging unit, for judging whether the loss that signal penetrates floor is greater than setting threshold;
Signal weighting unit, if for being greater than setting threshold, was then mixed into two-way orthogonal signalling by the signal weighting of the multiple antennas output of multiple antenna communication before carrying out closing road.
In embodiments more of the present disclosure, multiple antenna communication is the LTE system of FDD or TDD standard, and another communication system is other mobile communication system except LTE system.
In embodiments more of the present disclosure, between the antenna of each floor branch road of indoor distributed system, be in vertical isolation state.
In embodiments more of the present disclosure, when multiple antenna communication comprises two transmit antennas, an output of mixer is connected with the antenna of the odd floors branch road of indoor distributed system, and another output of mixer is connected with the antenna of the even floors branch road of indoor distributed system.
In embodiments more of the present disclosure, signal weighting unit comprises:
Coupler, the signal for each antenna output end by multiple antenna communication is separated according to different proportion;
Electric bridge, for will from the isolated signal plus of different antennae output to form two-way orthogonal signalling.
In technical scheme of the present disclosure, because the information source having at least one deck and this layer to connect in contiguous floors is different, and cover contiguous floors because signal can penetrate floor, therefore can realize MIMO between contiguous floors.Because this implementation does not introduce new components and parts, and engineering amount of reform is very little, and the MIMO therefore significantly reducing indoor distributed system realizes cost.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the disclosure, forms a application's part.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of the implementation method of the multi-input multi-output system of a disclosure embodiment.
Fig. 2 is that the indoor distributed system MIMO of disclosure scheme one realizes schematic diagram.
Fig. 3 is that the indoor distributed system MIMO of disclosure scheme two realizes schematic diagram.
Fig. 4 is the operation principle schematic diagram that the disclosure balances compound single channel double fluid device.
Fig. 5 is the structural representation of the multi-input multi-output system of a disclosure embodiment.
Embodiment
Below with reference to accompanying drawings the disclosure is described.It should be noted that following being described in is only explanatory and exemplary in essence, never as any restriction to the disclosure and application or use.Unless stated otherwise, otherwise positioned opposite and numerical expression and the numerical value of the parts of setting forth in an embodiment and step do not limit the scope of the present disclosure.In addition, technology well known by persons skilled in the art, method and apparatus may not be discussed in detail, but are intended to the part becoming specification in appropriate circumstances.
The following embodiment of the disclosure is on the basis of existing indoor distributed system, through improving the small-scale of indoor distributed system, people is for producing the second orthogonal multipath in road, low cost, simple and have effectively achieved MIMO spatial reuse function, improve the perception of the network capacity of indoor distributed system, speed and the network user.
Fig. 1 is the schematic flow sheet of the implementation method of the multi-input multi-output system of a disclosure embodiment.
As shown in Figure 1, this embodiment can comprise the following steps:
S102, the signal of the every root antenna output end from multiple antenna communication is carried out conjunction road with the signal of another communication system antenna output respectively, particularly, the signal of every root antenna output end can from the RRU of multiple antenna communication (RemoteRFUnit, radio frequency remote equipment) or base station equipment;
S104, conjunction Hou Mei road, road signal is inputed to respectively each floor branch antenna of indoor distributed system as information source, wherein, according to the size of floor area coverage, same floor can dispose one or more antenna, the information source that every root antenna receives is all identical, and the information source inputing to arbitrary floor branch antenna is different from the information source of the one deck inputed in its contiguous floors or two-layer branch antenna, realizes double fluid to utilize single channel indoor distributed system.
In an example, suppose that certain building has 6 layers, multiple antenna communication has two transmit antennas, indoor distributed system is disposed in this building, can antenna 1 and the signal after closing road that transmits of other communication systems be inputed in the antenna of 1 floor, 4 floor and 5 floor, the transmit signal close road after of antenna 2 with other communication systems is inputed in the antenna of 2 floor, 3 floor and 6 floor.Because every layer can receive this layer and the signal of adjacent layer antenna transmission, therefore indoor MIMO can be realized.
In another example, assumed condition is identical with above-mentioned example, can also dispose in the following manner: can antenna 1 and the signal after closing road that transmits of other communication systems be inputed in the antenna of 1 floor, 3 floor and 5 floor, the transmit signal close road after of antenna 2 with other communication systems is inputed in the antenna of 2 floor, 4 floor and 6 floor.Because every layer can receive the signal of this layer and adjacent layer antenna transmission, because the conjunction road signal of the adjacent two layers of every layer is all different from current layer, when current layer can receive the same road signal of adjacent two layers transmitting, increase the coverage strength of adjacent layer signal at current layer, therefore can realize indoor MIMO better.
In this embodiment, because the information source having at least one deck and this layer to connect in contiguous floors is different, and cover contiguous floors because signal can penetrate floor, therefore can realize MIMO between contiguous floors.Because this implementation does not introduce new components and parts, and engineering amount of reform is very little, and the MIMO therefore significantly reducing indoor distributed system realizes cost.
In a further example, first can judge whether the loss that signal penetrates floor is greater than setting threshold; If be greater than setting threshold, then before carrying out closing road, the signal weighting of the multiple antennas output of multiple antenna communication is mixed into two-way orthogonal signalling.
Namely, when floor penetration loss is larger, can before the signal of multiple antenna communication and another communication system signal be carried out conjunction road, first each road signal of multiple antenna communication is weighted mixing, make the signal all containing two-way before mixing in the signal of mixed every road, like this, after carrying out conjunction road by this signal and with another communication system signal, make each road signal all containing multiaerial system in each floor branch road of indoor distributed system, prevent because floor penetration loss is excessive and cause user to receive simple two-way signal.
Particularly, the step signal weighting of the multiple antennas output of multiple antenna communication being mixed into two-way orthogonal signalling can comprise: be separated according to different proportion by the signal of coupler by each antenna output end of multiple antenna communication; Will from the isolated signal plus of different antennae output to form two-way orthogonal signalling.
Such as, suppose that multiple antenna communication comprises two transmit antennas, by a coupler first via can be transmitted and be divided into two paths of signals M11 and M12 by 1:1, by another coupler the second tunnel transmitted again and be divided into two paths of signals M21 and M22 by 1:3, it is to be noted, the segregation ratio of each road signal is not limited to this, as long as the segregation ratio difference transmitted to two-way.And then M11 is combined with M21 and M22 respectively, by M12 and M21 and M22 combination, form two-way orthogonal signalling.
It is to be noted, when multiple antenna communication comprises two transmit antennas, conjunction road Hou mono-tunnel information source is inputed to the antenna of the odd floors branch road of indoor distributed system, the antenna of the even floors branch road of another road information source input indoor distributed system behind road will be closed.Like this, can receive the same road signal penetrated from contiguous floors at current floor, and then enhance the signal strength signal intensity of this road signal, what improve MIMO realizes effect.
In addition, between the antenna of each floor branch road of indoor distributed system, be in vertical isolation state, to make the signal from This floor and the signal in orthogonal from contiguous floors.
Multiple antenna communication in above-described embodiment can be FDD or TDD (TimeDivisionDuplex, time division duplex) LTE system of standard, another communication system can for other mobile communication system except LTE system, such as, CDMA (CodeDivisionMultipleAccess, code division multiple access), WCDMA (WidebandCodeDivisionMultipleAccess, Wideband Code Division Multiple Access (WCDMA)), GSM (GlobalSystemforMobilecommunications, global system for mobile communications), TD-SCDMA (TimeDivision-SynchronizationCodeDivisionMultipleAccess, Time Division-Synchronous Code Division Multiple Access accesses) etc.
Next by instantiation, above-described embodiment is described further.
According to research test data analysis, if double fluid effect is more satisfactory when two paths of signals level difference is no more than 5dB.
Scheme one: hierarchy optimization solution is divided in room
Fig. 2 is that the indoor distributed system MIMO of disclosure scheme one realizes schematic diagram.
As shown in Figure 2, utilize LTERRU two transmit antennas port to connect the indoor distributed system of different layers respectively, such as, port one connects 1,3,5,7 layer, and port 2 connects 2,4,6,8 layers.
Due to from the signal of port one and the air transmission matrix H of the two paths of signals from port 2 orthogonal, the floor that the signal of 2 layers can penetrate 1,2 interlayers covers in 1 layer, therefore can form the multipath signal of a road loss and time delay and 1 floor middle port 1 signal in orthogonal, concrete mathematical model is as follows:
R1＝L*h11*S1+h12*S2
R2＝L*h21*S1+h22*S2
Wherein, L is the penetration loss of signal through floor, h11, h12, h21, h22 is each element in transmission matrix H, represent the transmission coefficient of two paths of signals to two reception antennas of terminal, h11 represents No. 1 of the terminal transmission system between antenna and port one, h12 represents the transmission system between No. 1 antenna of terminal and port 2, h21 represents No. 2 of the terminal transmission systems between antenna and port one, h22 represents the transmission system between No. 2 antennas of terminal and port 2, R1, R2 is the Received signal strength of terminal two antenna, S1, S2 is the two paths of signals that port one and port 2 are launched, use its inverse matrix can go out original bit stream signal according to the signal receiving received according to above transmission matrix H, i.e. S1 and S2.Such as, LTE can send reference signal at forward direction, and terminal can obtain the transmission matrix H of two paths of signals by measuring reference signals, and terminal calculates inverse matrix according to transmission matrix H, then the R1 that will receive, R2 Matrix Multiplication just can obtain S1 and S2 with inverse matrix.
When actual indoor distributed system is built, the antenna of each floor is all hidden in inside ceiling, penetrate floor in lower layer signal, after this layer signal penetrates ceiling, if it is better to use simple staggered floor to cover double-current effect when two paths of signals difference is no more than 5dB.Generally, ceiling penetration loss is 8dB, then floor loss is no more than 5+8=13dB.
The advantage of the program is that engineering amount of reform is relatively less, and without introduction means, cost is minimum.The program extraordinaryly can be applicable to the scene of floor penetration loss lower than 13dB.
Scheme two: the compound separate zone stimulation scheme of weighting
Fig. 3 is that the indoor distributed system MIMO of disclosure scheme two realizes schematic diagram.
Fig. 4 is the operation principle schematic diagram that the disclosure balances compound single channel double fluid device.
As shown in Figure 3 and Figure 4, system that employs the compound single channel double fluid device of balance and staggered floor covering method.Wherein, balance compound single channel double fluid device and use customization electric bridge to be weighted by two paths of signals and to mix and be divided into orthogonal two paths of signals, two paths of signals is input in odd and even number floor respectively, carries out alternate covering, utilizes single channel indoor distributed system to realize double-current function.Balance compound single channel double fluid device and can comprise coupler (nonequilibrium bridge also can be utilized to realize), power splitter and balanced bridge electric bridge, balance compound single channel double fluid device by coupler by the signal coupling of port one a part in the signal of port 2, form new branch road 1, in like manner by the signal coupling of port 2 part in the signal of port one, form new branch road 2, these two new branch roads cover the different floors of indoor distributed system respectively, owing to passing through signal weighting, two paths of signals is orthogonal, therefore reaches MIMO requirement.
As shown in Figure 3, based on above-mentioned consideration, following Mathematical Modeling is proposed:
R1＝h11*(0.5S1+0.25S2)*L+h12*(0.5S1+0.75S2)
＝(0.5L*h11+0.5h12)*S1+(0.25L*h11+0.75h12)*S2
R2＝h21*(0.5S1+0.25S2)*L+h22*(0.5S1+0.75S2)
＝(0.5L*h21+0.5h22)*S1+(0.25L*h21+0.75h22)*S2
Wherein, h11, h12, h21, h22 are the transmission matrix in two floors between indoor distributed system antenna and user antenna, and its implication is floor penetration loss with scheme one, L.
As can be seen from Figure 4, the signal in port one, 2 is separated according to different proportion with power splitter by coupler, such as, by the signal coupling 1/4 in port one, by signal coupling 1/2 in port 2; The signal be coupled out is joined respectively in an other road signal, form two-way orthogonal signalling; Again two paths of signals is covered different floor respectively, utilize the mode of alternate covering, form MIMO;
As can be seen from above-mentioned Mathematical Modeling, S1, S2 two paths of signals maximum difference 0.5/0.25=2 times=3dB, meet the requirement of above-mentioned 5dB.And the coefficient of S1, S2 has orthogonality in above-mentioned Mathematical Modeling, therefore the order of transmission matrix H is 2, can calculate source code flow signal S1 and S2 according to this inverse of a matrix matrix.
From Mathematical Modeling, S1 and the S2 coefficient amplitude that terminal two antenna receives is suitable, solves the terminal caused because of storey floors penetration loss reason in scheme one and receives two-way code stream intensity imbalance problem.
In this scenario, two paths of signals is weighted and mixes and be divided into orthogonal two paths of signals, two paths of signals is input to respectively in odd and even number floor, carries out alternate covering, utilize single channel room subsystem to achieve double-current function, and then achieve the MIMO function of indoor distributed system.
The advantage of the program is that engineering amount of reform is relatively less, and introduction means is less, and electric bridge volume is little, easy for installation, and cost is lower, and because two paths of data stream receiving intensity is suitable, double-current effect is optimum, and can realize multiuser MIMO in indoor distributed system.
The program very well can be applicable to the scene that floor penetration loss is greater than 13dB.
In figure 3, the weighted blend of balance compound single channel double fluid device realization to LTE signal can be utilized.Particularly, compound double-current device balance two paths of signals is utilized, S1, S2 two paths of signals maximum difference 0.5/0.25=2 times=3dB.
In above-mentioned two schemes, the floor that can penetrate 1,2 interlayers due to the signals of 2 layers covers in 1 layer, form the multipath signal of a road loss and time delay and 1 floor middle port 1 signal in orthogonal, therefore, the two-way utilizing large space, the greatly antenna of isolation to achieve LTE indoor distribution system sends.Because usual mimo antenna space length is at about 1 meter, or the same antenna not same polarization, and antenna space distance of the present disclosure is more than 3 meters, and be vertical isolation, therefore isolation is greater than usual mimo antenna each other.
Disclosure above-described embodiment is transformed (such as by simple on common single channel indoor distributed system basis, the trunk of not system is divided) for indoor, LTE indoor distribution overlay network basis realizes LTE double fluid function, and double-current improvement cost is only one of percentage of traditional double-current improvement cost.
One of ordinary skill in the art will appreciate that, realize the whole of said method embodiment to have been come by the hardware that program command is relevant with part steps, aforesaid program can be stored in a computing equipment read/write memory medium, this program is when performing, perform and comprise the step of said method embodiment, and aforesaid storage medium can comprise ROM, RAM, magnetic disc and CD etc. various can be program code stored medium.
Fig. 5 is the structural representation of the multi-input multi-output system of a disclosure embodiment.
As shown in Figure 5, the system 50 in this embodiment can comprise multiple antenna communication 502 and mixer 504, wherein,
The signal of the every root antenna output end from multiple antenna communication is carried out conjunction road with the signal of another communication system antenna output by mixer 504 respectively, conjunction Hou Mei road, road signal is inputed to respectively each floor branch antenna of indoor distributed system as information source, wherein, the information source inputing to arbitrary floor branch antenna is different from the information source of the one deck inputed in its contiguous floors or two-layer branch antenna, realizes double fluid to utilize single channel indoor distributed system.
Further, multi-input multi-output system can also comprise judging unit and signal weighting unit.Wherein, judging unit, for judging whether the loss that signal penetrates floor is greater than setting threshold; Signal weighting unit, if for being greater than setting threshold, was then mixed into two-way orthogonal signalling by the signal weighting of the multiple antennas output of multiple antenna communication before carrying out closing road.
In an example, signal weighting unit can comprise coupler and electric bridge, wherein, coupler, the signal for each antenna output end by multiple antenna communication is separated according to different proportion; Electric bridge, for will from the isolated signal plus of different antennae output to form two-way orthogonal signalling.
In addition, when multiple antenna communication comprises two transmit antennas, an output of mixer is connected with the antenna of the odd floors branch road of indoor distributed system, and another output of mixer is connected with the antenna of the even floors branch road of indoor distributed system.
Vertical isolation state is between the antenna of each floor branch road of indoor distributed system.
Wherein, multiple antenna communication can be the LTE system of FDD or TDD standard, and another communication system can be other mobile communication system except LTE system, such as, and CDMA, WCDMA, GSM, TD-SCDMA etc.
In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and part identical with similar between each embodiment can cross-reference.For device embodiment, due to itself and embodiment of the method basic simlarity, so description is fairly simple, relevant part can see the explanation of embodiment of the method part.
Although describe the disclosure with reference to exemplary embodiment, should be understood that the disclosure is not limited to above-mentioned exemplary embodiment.It will be obvious to those skilled in the art that and can revise above-mentioned exemplary embodiment under the condition not deviating from the scope of the present disclosure and spirit.The scope of appended claim should be endowed the widest explanation, to comprise all such amendments and equivalent 26S Proteasome Structure and Function.
Claims (12)
1. an implementation method for multi-input multi-output system, is characterized in that, comprising:
The signal of the every root antenna output end from multiple antenna communication is carried out conjunction road with the signal of another communication system antenna output respectively;
Conjunction Hou Mei road, road signal is inputed to respectively each floor branch antenna of indoor distributed system as information source, wherein, the information source inputing to arbitrary floor branch antenna is different from the information source of the one deck inputed in its contiguous floors or two-layer branch antenna, realizes double fluid to utilize single channel indoor distributed system.
2. the implementation method of multi-input multi-output system according to claim 1, is characterized in that, described method also comprises:
Judge whether the loss that signal penetrates floor is greater than setting threshold;
If be greater than setting threshold, then before carrying out closing road, the signal weighting of the multiple antennas output of multiple antenna communication is mixed into two-way orthogonal signalling.
3. the implementation method of multi-input multi-output system according to claim 1 and 2, is characterized in that, described multiple antenna communication is the LTE system of FDD or TDD standard, and another communication system described is other mobile communication system except LTE system.
4. the implementation method of multi-input multi-output system according to claim 1 and 2, is characterized in that, is in vertical isolation state between the antenna of each floor branch road of described indoor distributed system.
5. the implementation method of multi-input multi-output system according to claim 1 and 2, it is characterized in that, when described multiple antenna communication comprises two transmit antennas, conjunction road Hou mono-tunnel information source is inputed to the antenna of the odd floors branch road of indoor distributed system, the antenna of the even floors branch road of another road information source input indoor distributed system behind road will be closed.
6. the implementation method of multi-input multi-output system according to claim 2, is characterized in that, the step that the described signal weighting by the multiple antennas output of multiple antenna communication is mixed into two-way orthogonal signalling comprises:
Be separated according to different proportion by the signal of coupler by each antenna output end of multiple antenna communication;
Will from the isolated signal plus of different antennae output to form two-way orthogonal signalling.
7. a multi-input multi-output system, is characterized in that, comprises multiple antenna communication and mixer, wherein,
The signal of the every root antenna output end from multiple antenna communication is carried out conjunction road with the signal of another communication system antenna output by described mixer respectively, conjunction Hou Mei road, road signal is inputed to respectively each floor branch antenna of indoor distributed system as information source, wherein, the information source inputing to arbitrary floor branch antenna is different from the information source of the one deck inputed in its contiguous floors or two-layer branch antenna, realizes double fluid to utilize single channel indoor distributed system.
8. multi-input multi-output system according to claim 7, is characterized in that, described multi-input multi-output system also comprises:
Judging unit, for judging whether the loss that signal penetrates floor is greater than setting threshold;
Signal weighting unit, if for being greater than setting threshold, was then mixed into two-way orthogonal signalling by the signal weighting of the multiple antennas output of multiple antenna communication before carrying out closing road.
9. the multi-input multi-output system according to claim 7 or 8, is characterized in that, described multiple antenna communication is the LTE system of FDD or TDD standard, and another communication system described is other mobile communication system except LTE system.
10. the multi-input multi-output system according to claim 7 or 8, is characterized in that, is in vertical isolation state between the antenna of each floor branch road of described indoor distributed system.
11. multi-input multi-output systems according to claim 7 or 8, it is characterized in that, when described multiple antenna communication comprises two transmit antennas, an output of mixer is connected with the antenna of the odd floors branch road of indoor distributed system, and another output of mixer is connected with the antenna of the even floors branch road of indoor distributed system.
12. multi-input multi-output systems according to claim 8, is characterized in that, described signal weighting unit comprises:
Coupler, the signal for each antenna output end by multiple antenna communication is separated according to different proportion;
Electric bridge, for will from the isolated signal plus of different antennae output to form two-way orthogonal signalling.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109982339A (en) * | 2017-12-28 | 2019-07-05 | 中国电信股份有限公司 | Indoor distributed system and two-way coupler |
| CN111313939A (en) * | 2020-02-24 | 2020-06-19 | 中国电信股份有限公司 | Multi-channel indoor distribution system and MIMO signal transmission method thereof |
| CN114171875A (en) * | 2022-02-14 | 2022-03-11 | 中国电信股份有限公司 | Combiner and indoor branch system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114335961A (en) * | 2017-12-28 | 2022-04-12 | 中国电信股份有限公司 | Double-path coupler and indoor distribution system |
| CN111313939A (en) * | 2020-02-24 | 2020-06-19 | 中国电信股份有限公司 | Multi-channel indoor distribution system and MIMO signal transmission method thereof |
| CN111313939B (en) * | 2020-02-24 | 2021-03-16 | 中国电信股份有限公司 | Multi-channel indoor distribution system and MIMO signal transmission method thereof |
| CN114171875A (en) * | 2022-02-14 | 2022-03-11 | 中国电信股份有限公司 | Combiner and indoor branch system |
| CN114171875B (en) * | 2022-02-14 | 2022-05-17 | 中国电信股份有限公司 | Combiner and indoor branch system |
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