CN103580736A - Power balance control method of antenna port of LTE MIMO system - Google Patents
Power balance control method of antenna port of LTE MIMO system Download PDFInfo
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- CN103580736A CN103580736A CN201310479375.6A CN201310479375A CN103580736A CN 103580736 A CN103580736 A CN 103580736A CN 201310479375 A CN201310479375 A CN 201310479375A CN 103580736 A CN103580736 A CN 103580736A
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Abstract
The invention discloses a power balance control method of an antenna port of an LTE MIMO system. The method is mainly characterized in that a path damage detection module is added in a repeater of the LTE MIMO system, and a passive electronic label is attached to the inner side of a dual polarized antenna in a matched mode. A radio-frequency signal transmitted by the path damage detection module reaches the dual polarized antenna port through a combiner and the like, the passive electronic label is activated, after being activated, the passive electronic label transmits the radio-frequency signal to the path damage detection module through the antenna, the path damage detection module receives the radio-frequency signal sent by the electronic label, the path damage value between an output port in an MIMO repeater device and the dual polarized antenna port is calculated through a data processing unit, data information is transmitted to a monitoring unit, and the monitoring unit automatically adjusts power output values of two down links in the repeater of the LTE MIMO system according to path damage value information, transmitted by the data processing unit, of different feeder circuits. According to the method, power imbalance at the antenna port can be timely found, and the power of the antenna port can be automatically adjusted.
Description
Technical field
The present invention relates to Information & Communication Technology field, be specifically related to the method that LTE mimo system antenna opening power-balance is controlled.
Background technology
Along with domestic mobile data services demand increases day by day, domestic each large operation commercial city has started LTE(Long Term Evolution) the commercial net of examination build, indoor overlay network construction is the most important thing of 4G network second phase planning.MIMO(Multiple-Input Multiple-Out-put) technology is one of 4G core technology, and aspect raising network rate and quality, it is playing the part of key player.The newly-built indoor covering system of 4G generally adopts double-fed line mimo system.A large amount of engineering tests show: the power of the end of double-fed line mimo system---antenna port must be about equally, i.e. the performance number balance of two antenna ports, and the indoor overlay area of guarantee peak data rate, and now communication quality is optimum.
As shown in Figure 1, for thering is at present the LTE double-fed line MIMO indoor covering system figure of trunking.Wherein, repeater comprises two-way up-downgoing amplification link, is connected to respectively between antenna for base station signal 1, antenna for base station signal 2 and two two power splitters.The downlink transfer link of Fig. 1 system: two-way antenna for base station signal enters LTE double-fed line MIMO repeater, through processing such as amplification, filtering, output two-way radiofrequency signal is respectively by two power splitters shunt Chu Si road radiofrequency signals, and cross match restructuring, sends a signal to dual polarized antenna; Uplink link: just in time contrary with downlink transfer link.
Balancing antenna mouth power, can only lean on debugging and testing personnel to adjust antenna opening power when engineering opening commissioning or plant maintenance and make it to export balance at present.But, the long-time operation of network, along with impacts such as device aging, ambient temperature variations, certainly will have different impacts to one group of double-fed wire antenna mouth performance number, cause this group antenna opening unbalanced power, and then affect indoor overlay area, traffic rate and communication quality.And when antenna opening unbalanced power, network monitoring center can't be found this fault at once, only have the network rate, of poor quality during to customer complaint of this section by the time, technical staff just can receive the notice of maintenance.
Summary of the invention
The object of the invention is to provide a kind of method that LTE mimo system antenna opening power-balance is controlled, and can find in time the unbalanced power of antenna opening, and automatically adjusts antenna opening power in time, to keep two antenna opening power outputs to equate.The object of the invention is realized by following technical scheme:
A kind of method that LTE mimo system antenna opening power-balance is controlled, its based on the system passive electronic label that comprises base station, LTE MIMO repeater, two power splitters, dual polarized antenna and be attached at dual polarized antenna inner side, LTE MIMO repeater is arranged between base station and two two power splitters, and two two power splitters shunt Chu tetra-tunnel radiofrequency signal cross match are delivered to dual polarized antenna through different feeder lines; LTE MIMO repeater comprises: link, two mixers, two path loss detection modules, data processing unit and monitoring units are amplified in two-way up-downgoing; Two mixers are incited somebody to action respectively descending amplification link on the way and after closing road with a path loss detection module, are connected two power splitters; Two two power splitters shunt Chu tetra-tunnel radiofrequency signal cross match are delivered to dual polarized antenna through different feeder lines; It is characterized in that, described method comprises:
(1) control described two path loss detection modules to described passive electronic label emitting radio frequency signal;
(2) described passive electronic label passes through described dual polarized antenna to path loss detection module emitting radio frequency signal after being activated;
(3) described path loss detection module receives the radiofrequency signal of passive electronic label transmitting;
(4) data processing unit, according to the radiofrequency signal transmitting and receiving of two path loss detection modules, calculates LTE MIMO repeater output port to the circuit loss value P of different feeder lines between dual polarized antenna port
n, computing formula is as follows:
P
n=P
TTX-P
MRX-P
△
Wherein, n is different feeder line names, n=1 or 2, P
tTXfor the transmitting power of passive electronic label to path loss detection module emitting radio frequency signal, P
mRXfor path loss detection module receives the received power of the radiofrequency signal that electronic tag sends over, P
△for passive electronic label imports loss into the power of dual polarized antenna inside;
(5) monitoring unit is according to the circuit loss value P of described different feeder lines
n, adjust the descending power output valve that link is amplified in two-way up-downgoing, so that the dual polarized antenna mouth transmission power level of same group of double-fed line is consistent.
As concrete technical scheme, it is identical that link structure is amplified in described two-way up-downgoing, is specifically configured to: comprise the first filter, first duplexer, power amplifier, LNA, the second duplexer and the second filter; The first filter one termination antenna for base station signal, the other end is connected with first duplexer two-way communication; One output of first duplexer connects power amplifier, and the output of power amplifier connects an input of the second duplexer; One output termination LNA of the second duplexer, an input of the output termination first duplexer of LNA; First duplexer is connected with one end two-way communication of the second filter, and the other end of the second filter is for being connected with a described mixer two-way communication.
As concrete technical scheme, described monitoring unit is adjusted two-way up-downgoing and is amplified the control end that the control signal of the descending power output valve of link accesses respectively the power amplifier of described two-way up-downgoing amplification link.
As concrete technical scheme, the frequency range of the radiofrequency signal of described path loss detection module transmitting is: 920～925MHz; After described passive electronic label is activated, the frequency range of the radiofrequency signal of transmitting is: 920～925MHz.
The present invention increases path loss detection module in LTE MIMO repeater, and in dual polarized antenna inner side, sticks passive electronic label ordinatedly.Like this, the radiofrequency signal of path loss detection module transmitting, via mixer, feeder line, power splitter, arrive dual polarized antenna port, activation is attached to the passive electronic label of antenna inner side, after passive electronic label is activated, by a day alignment path loss detection module emitting radio frequency signal, path loss detection module receives the radiofrequency signal that electronic tag sends over, and through data processing unit, calculates MIMO trunking output port to the circuit loss value between dual polarized antenna port; Data message is sent to monitoring unit, and the circuit loss value information of the different feeder lines that monitoring unit sends according to data processing unit, can adjust the power stage value of two down links of LTEMIMO repeater automatically.
Beneficial effect of the present invention is:
A., the power back-off of double-fed line transmission to signal attenuation is provided;
B. can balance control antenna opening power, improve 4G internal home network speed and communication quality;
C. reduce terminal equipment transmitting power, reduce terminal equipment power consumption;
D. can find in time antenna opening power abnormal conditions, notify Surveillance center at once;
E. reduce attendant and turn out for work, lower maintenance cost;
F. according to business demand, can remote adjustment antenna opening power, control coverage, accomplish to save energy and reduce the cost.
Accompanying drawing explanation
Fig. 1 is for having at present the formation block diagram of the LTE double-fed line MIMO indoor covering system of trunking.
The formation block diagram of the LTE MIMO repeater that Fig. 2 provides for the embodiment of the present invention.
The antenna opening power-balance control principle block diagram that Fig. 3 provides for the embodiment of the present invention.
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment
As shown in Figure 2, the method that LTE mimo system antenna opening power-balance that the present embodiment provides is controlled, mainly by a LTE MIMO repeater and coordinate a passive electronic label (not showing in Fig. 2) to realize.Wherein, LTE MIMO repeater is arranged between base station and two two power splitters of LTE double-fed line MIMO indoor covering system, and two two power splitters shunt Chu tetra-tunnel radiofrequency signal cross match are delivered to dual polarized antenna through different feeder lines.LTE MIMO repeater comprises: link is amplified in the first up-downgoing, link, the first mixer, the second mixer, the first path loss detection module, the second path loss detection module, data processing unit and monitoring unit are amplified in the second up-downgoing.
Wherein, the aerial signal 1 of the connection base station, one end of link is amplified in the first up-downgoing, and the other end connects the first mixer.The aerial signal 2 of the connection base station, one end of link is amplified in the second up-downgoing, and the other end connects the second mixer.The first mixer amplifies the first up-downgoing after link closes road with one end of the first path loss detection module and is connected.Two power splitters (in conjunction with Fig. 1).The second mixer amplifies the second up-downgoing after link closes road with one end of the second path loss detection module and is connected another two power splitter (in conjunction with Fig. 1).Passive electronic label is attached at described dual polarized antenna inner side, for after being activated by dual polarized antenna to path loss detection module emitting radio frequency signal.The other end connection data processor of the first path loss detection module, it is for to passive electronic label emitting radio frequency signal, and receives the radiofrequency signal of passive electronic label transmitting.The other end connection data processor of the second path loss detection module, it is for to passive electronic label emitting radio frequency signal, and receives the radiofrequency signal of passive electronic label transmitting.Data processing unit, according to the radiofrequency signal transmitting and receiving of the first path loss detection module and the second path loss detection module, calculates repeater output port to the circuit loss value of different feeder lines between dual polarized antenna port.The circuit loss value information of the described different feeder lines that monitoring unit provides according to data processing unit, adjusts the descending power output valve that link is amplified in first, second up-downgoing.
Particularly, it is identical with the first up-downgoing amplification link structure that link is amplified in the first up-downgoing, is specifically configured to: comprise the first filter, first duplexer, power amplifier, LNA, the second duplexer and the second filter; The first filter one termination antenna for base station signal, the other end is connected with first duplexer two-way communication; One output of first duplexer connects power amplifier, and the output of power amplifier connects an input of the second duplexer; One output termination LNA of the second duplexer, an input of the output termination first duplexer of LNA; First duplexer is connected with one end two-way communication of the second filter, and the other end of the second filter is for being connected with the described first or second mixer two-way communication.Above-mentioned monitoring unit is adjusted first, second up-downgoing and is amplified the control end that the power amplifier of link is amplified in described first, second up-downgoing of control signal access of the descending power output valve of link.
Above-mentioned LTE MIMO repeater, its binary channels down link: antenna for base station signal 1, antenna for base station signal 2 are connected to antenna end at a distance by the signal behind filter, duplexer, power amplifier, duplexer, filter and path loss detection module He Lu，He road separately by double-fed line respectively; Binary channels up link: the signal that antenna reception sends to terminal equipment is at a distance through entering base station equipment after mixer, filter, duplexer, LNA, duplexer, filter separately.
As shown in Figure 3, be the method that LTE mimo system antenna opening power-balance provided by the invention is controlled, its principle is: in LTE MIMO repeater, increase path loss detection module, and in dual polarized antenna inner side, stick passive electronic label ordinatedly.Path loss detection module emitting radio frequency signal (920～925MHz) wherein, by through feeder line, mixer, power splitter, arrive dual polarized antenna port, activation is attached to the passive electronic label of antenna inner side, after passive electronic label is activated, by a day alignment path loss detection module emitting radio frequency signal, (920～925MHz, transmitting power is P
tTX), path loss detection module receives the radiofrequency signal that electronic tag sends over, and (received power is P
mRX), can calculate so repeater output port to the circuit loss value P between dual polarized antenna port
n(n is different feeder line names, n=1 or 2)
P
n=P
TTX-P
MRX-P
△
P
△: passive electronic label imports loss into the power of dual polarized antenna inside, and after Antenna Design completes, this parameter is known determined value;
P
tTX: the nominal value after passive electronic label dispatches from the factory.
Pass through correlation data calculation, data message is sent to monitoring unit, the circuit loss value information of the different feeder lines that monitoring unit sends according to data processing unit, can automatically adjust two descending power output valves of repeater, guarantee that the dual polarized antenna mouth transmission power level of same group of double-fed line is consistent.For example: if the circuit loss value P of same group of double-fed line after testing, after computing
1, P
2be respectively: 18dB, 20dB can adjust two descending power output valve P so in MIMO trunking
oUT1, P
oUT2, make P
oUT1-P
1=P
oUT2– P
2, that is: P
oUT1– 18=P
oUT2– 20, that is: P
oUT1+ 2=P
oUT2
Beneficial effect of the present invention is:
A., the power back-off of double-fed line transmission to signal attenuation is provided;
B. can balance control antenna opening power, improve 4G internal home network speed and communication quality;
C. reduce terminal equipment transmitting power, reduce terminal equipment power consumption;
D. can find in time antenna opening power abnormal conditions, notify Surveillance center at once;
E. reduce attendant and turn out for work, lower maintenance cost;
F. according to business demand, can remote adjustment antenna opening power, control coverage, accomplish to save energy and reduce the cost.
Above embodiment is only fully openly the present invention, wherein physical circuit schematic diagram should not be considered to realize unique example of the present invention, based on purport of the present invention, based on the present embodiment, without creative work, be that attainable other concrete examples should belong to the scope that the application discloses.
Claims (4)
1. the method that a LTE mimo system antenna opening power-balance is controlled, its based on the system passive electronic label that comprises base station, LTE MIMO repeater, two power splitters, dual polarized antenna and be attached at dual polarized antenna inner side, LTE MIMO repeater is arranged between base station and two two power splitters, and two two power splitters shunt Chu tetra-tunnel radiofrequency signal cross match are delivered to dual polarized antenna through different feeder lines; LTE MIMO repeater comprises: link, two mixers, two path loss detection modules, data processing unit and monitoring units are amplified in two-way up-downgoing; Two mixers are incited somebody to action respectively descending amplification link on the way and after closing road with a path loss detection module, are connected two power splitters; Two two power splitters shunt Chu tetra-tunnel radiofrequency signal cross match are delivered to dual polarized antenna through different feeder lines; It is characterized in that, described method comprises:
(1) control described two path loss detection modules to described passive electronic label emitting radio frequency signal;
(2) described passive electronic label passes through described dual polarized antenna to path loss detection module emitting radio frequency signal after being activated;
(3) described path loss detection module receives the radiofrequency signal of passive electronic label transmitting;
(4) data processing unit, according to the radiofrequency signal transmitting and receiving of two path loss detection modules, calculates LTE MIMO repeater output port to the circuit loss value P of different feeder lines between dual polarized antenna port
n, computing formula is as follows:
P
n=P
TTX-P
MRX-P
△
Wherein, n is different feeder line names, n=1 or 2, P
tTXfor the transmitting power of passive electronic label to path loss detection module emitting radio frequency signal, P
mRXfor path loss detection module receives the received power of the radiofrequency signal that electronic tag sends over, P
△for passive electronic label imports loss into the power of dual polarized antenna inside;
(5) monitoring unit is according to the circuit loss value P of described different feeder lines
n, adjust the descending power output valve that link is amplified in two-way up-downgoing, so that the dual polarized antenna mouth transmission power level of same group of double-fed line is consistent.
2. the method that LTE mimo system antenna opening power-balance according to claim 1 is controlled, it is characterized in that, it is identical that link structure is amplified in described two-way up-downgoing, is specifically configured to: comprise the first filter, first duplexer, power amplifier, LNA, the second duplexer and the second filter; The first filter one termination antenna for base station signal, the other end is connected with first duplexer two-way communication; One output of first duplexer connects power amplifier, and the output of power amplifier connects an input of the second duplexer; One output termination LNA of the second duplexer, an input of the output termination first duplexer of LNA; First duplexer is connected with one end two-way communication of the second filter, and the other end of the second filter is for being connected with a described mixer two-way communication.
3. the method that LTE mimo system antenna opening power-balance according to claim 2 is controlled, it is characterized in that, described monitoring unit is adjusted two-way up-downgoing and is amplified the control end that the control signal of the descending power output valve of link accesses respectively the power amplifier of described two-way up-downgoing amplification link.
4. the method that LTE mimo system antenna opening power-balance according to claim 1 is controlled, is characterized in that, the frequency range of the radiofrequency signal of described path loss detection module transmitting is: 920～925MHz; After described passive electronic label is activated, the frequency range of the radiofrequency signal of transmitting is: 920～925MHz.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104159238A (en) * | 2014-09-09 | 2014-11-19 | 刘秀珠 | Method for indoor wireless communication system |
| CN104243060A (en) * | 2014-08-26 | 2014-12-24 | 朱今兰 | Forwarding device based on LTE and radio frequency detection method |
| CN106716860A (en) * | 2014-09-03 | 2017-05-24 | 株式会社Ntt都科摩 | Wireless transmitting station |
| CN110139309A (en) * | 2019-04-29 | 2019-08-16 | 武汉虹信通信技术有限责任公司 | A kind of power detection regulating system, power detecting method and power regulating method |
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| CN102124789A (en) * | 2008-08-20 | 2011-07-13 | 高通股份有限公司 | Power control for wireless lan stations |
| CN102932897A (en) * | 2012-11-12 | 2013-02-13 | 中国联合网络通信集团有限公司 | Auxiliary pilot frequency transmission power adjustment method and base station |
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Patent Citations (3)
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| CN102124789A (en) * | 2008-08-20 | 2011-07-13 | 高通股份有限公司 | Power control for wireless lan stations |
| US20110105059A1 (en) * | 2009-05-04 | 2011-05-05 | Qualcomm Incorporated | Uplink power control for wireless communication |
| CN102932897A (en) * | 2012-11-12 | 2013-02-13 | 中国联合网络通信集团有限公司 | Auxiliary pilot frequency transmission power adjustment method and base station |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104243060A (en) * | 2014-08-26 | 2014-12-24 | 朱今兰 | Forwarding device based on LTE and radio frequency detection method |
| CN104243060B (en) * | 2014-08-26 | 2016-11-23 | 国网山东省电力公司烟台供电公司 | A kind of retransmission unit based on LTE and radio frequency detection method |
| CN106716860A (en) * | 2014-09-03 | 2017-05-24 | 株式会社Ntt都科摩 | Wireless transmitting station |
| CN104159238A (en) * | 2014-09-09 | 2014-11-19 | 刘秀珠 | Method for indoor wireless communication system |
| WO2016037421A1 (en) * | 2014-09-09 | 2016-03-17 | 刘秀珠 | Method for optimizing indoor wireless communication system |
| CN110139309A (en) * | 2019-04-29 | 2019-08-16 | 武汉虹信通信技术有限责任公司 | A kind of power detection regulating system, power detecting method and power regulating method |
| CN110139309B (en) * | 2019-04-29 | 2022-07-19 | 武汉虹信科技发展有限责任公司 | Power detection and regulation system, power detection method and power regulation method |
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