CN101321330A - Same-frequency band combination and shunt circuit composite unit, apparatus and method - Google Patents
Same-frequency band combination and shunt circuit composite unit, apparatus and method Download PDFInfo
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- CN101321330A CN101321330A CNA2008100296594A CN200810029659A CN101321330A CN 101321330 A CN101321330 A CN 101321330A CN A2008100296594 A CNA2008100296594 A CN A2008100296594A CN 200810029659 A CN200810029659 A CN 200810029659A CN 101321330 A CN101321330 A CN 101321330A
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Abstract
The invention discloses a same frequency band combining and dividing complex unit, including: a duplexer, allocated independently for each same frequency band system signal from the base station, providing duplex switching for the uplink and the downlink of the system signals; an isolating unit, allocated independently for each uplink and each downlink, for improving the signal isolation degree when the same frequency band system signals are transmitted in a same direction; an electric bridge combiner/divider, allocated independently for each same frequency band system signal, for combing the downlink signals of two same frequency band system signals to transmit by one path at least, or, feeding at least one path of uplink signals in the uplink of the two same frequency band system signals. In addition, the invention also discloses a device applying the unit and a corresponding processing method. The invention has the following advantages: firstly, the isolation degree between the same frequency bands is improved, and regulated according to the requirements; secondarily, the passive inter-modulation property of the system signals can be reduced.
Description
[technical field]
The present invention relates to a kind of path combining technique of communication system, relate in particular to a kind of same-frequency band combination and shunt circuit composite unit, device and method that is applicable to multi-system access platform.
[technical background]
Multi-system access platform (POI, Points Of Interface) is one of catenet central apparatus of covering engineering, close the road by system signal, and the signal that will close behind the road introduced the antenna feeder compartment system multiple business, reach and make full use of resource, the purpose of reducing investment outlay.
But because frequency resource limited has above operators of two families in the same system, the method that multisystem multi-operator frequency range is closed the road as shown in Figure 1 at present.Close the signal of road homologous ray multi-operator with at least one electric bridge mixer, and then close each electric bridge mixer of road with the frequency range mixer and close the different system signal of exporting behind the road.
This design according to Fig. 1, isolation is less between each operator of homologous ray, easily cause base station alarm, though can be by increasing the isolation between the signal of different operators that isolated location improves identical systems, but owing to use magnetic material in the isolated location design, its passive intermodulation poor performance is about-80dBc, and this is far smaller than the requirement of base station receiver less than-140dBc.In order to solve this deficiency, the normal method that adopts is when intermodulation has influence on base station receiver in the known technology, and the transmitting-receiving frequency that changes the base station is avoided passive intermodulation, and such measure can influence normal frequency planning undoubtedly.
Thereby, how to be the technological difficulties that need to be resolved hurrily in the current multi-system access platform to close the road with frequency band signals effectively.
[summary of the invention]
For this reason, purpose of the present invention will overcome above-mentioned deficiency exactly, and a kind of same-frequency band combination and shunt circuit composite unit is provided, and is applied in the multi-system access platform, provides preferable composite effect for one group two with frequency band signals.
Another object of the present invention is for a kind of same-frequency band combination road multiplexer composite device being provided, integrating the unit described in a plurality of last purposes, to handle many groups with the frequency range system signal.
A further object of the present invention is to sum up aforementioned two purposes, provides a kind of same-frequency band combination road complex method along separate routes, so that those skilled in the art can realize the unit or the device of other version in view of the above flexibly.
For realizing this purpose, the present invention adopts following technical scheme:
Same-frequency band combination and shunt circuit composite unit of the present invention, in multi-system access platform, finish two with the system signal of frequency range close road and along separate routes, comprising:
Duplexer for independently being equipped with the frequency range system signal from each of base station, providing the up link of system signal and the duplex of down link is switched;
Isolated location, for each up link and each down link independently are equipped with, the Signal Spacing degree when raising is transmitted in the same way with the frequency range system signal;
The electric bridge combiner-divider, for each independently is equipped with the frequency range system signal, two described down link signals with the frequency range system signal are closed the road become the output of at least one road, or, will go signal at least on the way along separate routes and in two described up links of feed-in with the frequency range system signal.
In the up link and down link with frequency range system signal together, its employed separately isolated location inserts loss by the difference of link under making.
Described isolated location adopts circulator to realize.Each isolated location adopts the cascade of at least two circulator phases.
Same-frequency band combination of the present invention road multiplexer composite device comprises at least two described same-frequency band combination and shunt circuit composite units, is respectively applied for to handle the different system frequency band signals, and comprises,
The frequency range combiner-divider closes road feed-in antenna-feedback system with the down link and the up link of the output of each electric bridge combiner-divider in each same-frequency band combination and shunt circuit composite unit, or, the signal of antenna-feedback system feed-in is shunted to each electric bridge mixer.
Exist two described frequency ranges to close the road splitter, each closes output port of road splitter with each electric bridge and is connected, and two frequency ranges close that one of each self-forming of road splitter comprises identical downstream signal and different descending output port on phase place.
Same-frequency band combination of the present invention road is complex method along separate routes, and two-way is carried out signal transmission between base station and the antenna-feedback system with the system signal of frequency range,
When signal downlink, respectively two-way is isolated down link from the downstream signal of the same frequency range of base station, two down links are made different insertion losses, both isolation is improved after, two downstream signals with frequency range are closed the road so that export antenna-feedback system to;
When signal uplink, the upward signal from antenna-feedback system is carried out shunt, be dispensed in two up links with the frequency range system signal, two up links are made different insertion losses, both isolation is improved after, be fed into the base station more respectively.
In down link and up link, the method that improves isolation adopts circulator to realize.
Compared with prior art, the present invention possesses following advantage: at first, adopt circulator as isolated location, can change the insertion loss value of each frequency range, thereby the isolation between each frequency range is improved, and can regulate because of need; Secondly, because different system signals handles by unit independently separately, so the isolation between different system also can correspondingly improve; Once more, by the inhibitory action of duplexer, can reduce the passive intermodulation characteristic of system signal.
[description of drawings]
Fig. 1 is a same-frequency band combination road multiplexer composite device principle schematic in the prior art;
Fig. 2 is the principle schematic of same-frequency band combination of the present invention road multiplexer composite device.
[embodiment]
The present invention is further illustrated below in conjunction with drawings and Examples:
See also Fig. 2, same-frequency band combination of the present invention road multiplexer composite device by be used for GSM900, GSM1800 and WCDMA 3 same-frequency band combination and shunt circuit composite units of totally 3 different frequency ranges close the road splitter in conjunction with 2 frequency ranges and form, be used for multi-system access platform.The communication system of listed different frequency range can also be the communication system of other frequency range, for example TD-SCDMA, DCS etc. among the figure.
For each same-frequency band combination and shunt circuit composite unit shown in Figure 2, in the used unit of GSM900, two interface a1 and a2 are used to insert the signal of two-way from the GSM900 frequency range of base station, these two signals with frequency range are generally different operators and use, the frequency sub-band difference that is adopted each other, but because frequency range is close, so the easy phase mutual interference of signal.
In same unit, adopt the electrical structure of roughly the same symmetry.In the used unit of GSM900, signal for interface a1 and interface a2 input, interface a1 is by being connected with the synthetic port (not indicating among the figure) of a duplexer 11, two ports of the TX of this duplexer 11 and RX (not indicating among the figure) are respectively applied for transmission of downlink signal and upward signal, thereby realize the function of single worker's transmission herein, form the down link and the up link that are separated.
Duplexer 11 next-door neighbours corresponding with interface a1 are provided with, and are two (or two groups) isolated locations 121 and 122 that place its down link and up link, and wherein isolated location 121 is arranged in the down link, and isolated location 122 is arranged in the up link.Isolated location 121 and 122 all adopts circulator to realize that each isolated location 121,122 both can only comprise a circulator, also can comprise the circulator of a plurality of cascades.Under the good situation of coupling, any forward path can produce the insertion loss value of about-20dB in the single circulator when reverse transmission.Utilize this character, insert one or one group of circulator after, two isolations with the frequency range system signal improve about 20dB to I haven't seen you for ages.When using one group of circulator, i.e. during at least two circulator cascades, then can make isolation is that the basis is the multiple raising with 20dB.
In like manner, what be connected with interface a2 is duplexer 21, up link and down link have been isolated in the setting of duplexer 21, be provided with isolated location 221 and 222 in this up link and the down link equally, wherein the link at isolated location 221 places is a down link, and the link at isolated location 222 places is a up link.
Two ports that electric bridge among Fig. 2 closes road splitter 13 respectively with the down link of two-way GSM900 in isolated location 121 be connected with 221, so realize the downstream signal in the down link of two-way GSM900 is closed road output, because two paths of signals carries out the isolation processing by isolated location 121 and 221 respectively before closing the road, thereby both signal transmission qualities are comparatively reliable.
In like manner, two ports that electric bridge closes road splitter 23 respectively with the up link of two-way GSM900 in isolated location 122 be connected with 222 so that will by this electric bridge close the input of road splitter 23 other ends antenna-feedback system the signal feed-in and be dispensed in these two up links.Because these two up links all exist isolated location 122 and 222, thereby, the transmission quality of two upward signals in like manner can be guaranteed.
By above-mentioned duplexer 11,21, isolated location 121,122,221,222 and electric bridge close road splitter 13,23 promptly form same-frequency band combination and shunt circuit composite unit of the present invention, it has finished the high-isolation transfer of data with the frequency range system to two-way GSM900, has guaranteed the signal transmission quality between base station and the antenna-feedback system, because the effect of duplexer, the passive reflection intermodulation that each frequency range produced can be resisted, thereby can further reach the target of low intermodulation design.
But, above-mentioned this unit can only be adapted to the situation with a kind of system signal, and wants to handle simultaneously the signal of a plurality of different systems, then needs to be provided with a plurality of identical described unit, as shown in Figure 2, be respectively GSM900, GSM1800 and WCDMA described unit is set.
For each electric bridge of integrating in the different described unit closes road splitter 13,23,33,43,53,63 signal is provided with two frequency ranges and closes road splitter 51 and 52, and electric bridge closes road splitter 13,33,53, the downstream signal with frequency range closed the signal exported behind the road and close each corresponding port in road splitter 51 and 52, so that the downstream signal of a plurality of ports closes the road and exports antenna-feedback system to the most at last by two port symmetrical distribution to frequency range.Frequency range is closed the also reverse upward signal with the antenna-feedback system feed-in of road splitter 51 and 52 and is assigned to its a plurality of ports, further is fed into electric bridge afterwards and closes road splitter 23,43, described two ports of 63, so that electric bridge closes further transmission upward signal of road splitter 23,43,63.
Close road and by-passing by what frequency range was closed road splitter 51 and 52, be built into described same-frequency band combination road multiplexer composite device, can make the signal of a plurality of communication systems, homologous ray different operators carry out the high-isolation transmission process by a plurality of same-frequency band combination and shunt circuit composite units.
As shown in Figure 2, during signal downlink, establish if there is the signal of at least two systems, one of them is the GSM900 system signal, and there is the signal of two operators in this GSM900 system signal.
With the GSM900 system signal is example, the signal of different operators is respectively through interface a1 and a2 input, handle through duplexer 11 and 21 respectively then, the signal that makes different operators only respectively the down link by separately export isolated location 121 and 221 to, since isolated location 121 with 221 pairs under the insertion loss effect made of signal in the link different, therefore, the isolation of two signals can be improved, close road splitter 13 by electric bridge then and close the road, then by two port respectively symmetrical distribution to frequency range close in each corresponding port of road splitter 51 and 52.By that analogy, other system signal also in an identical manner the most at last downstream signal transfer to frequency range and close road splitter 51 and 52, finally close and be fed into antenna-feedback system by port ANT1 and ANT2 after road splitter 51 and 52 closes the road by frequency range.
And for the upward signal of GSM900 system, the signal of travelling carriage (as mobile phone) is after antenna-feedback system is handled, transfer to described two frequency ranges and close road splitter 51 and 52, be dispensed to two ports that electric bridge closes road splitter 23 by them, close road splitter 23 by electric bridge again and further it be dispensed to two isolated locations 122 and 222 in the up link, at last respectively through duplexer 11 and 21 gatings after interface a1 and a2 transfer to the base station.By that analogy, other system signal is also handled upward signal in an identical manner, and finally transfers to the base station.
In sum, in multi-system access platform, same-frequency band combination of the present invention road along separate routes complex method and device had both guaranteed the high-isolation of the signal of different system signal, homologous ray different operators, signal transmission quality is improved, reach the design object of low intermodulation again, improved prior art effectively.
The foregoing description is a preferred implementation of the present invention; but embodiments of the present invention not merely are restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1, a kind of same-frequency band combination and shunt circuit composite unit, in multi-system access platform, finish two with the system signal of frequency range close road and along separate routes, it is characterized in that comprising:
Duplexer for independently being equipped with the frequency range system signal from each of base station, providing the up link of system signal and the duplex of down link is switched;
Isolated location, for each up link and each down link independently are equipped with, the Signal Spacing degree when raising is transmitted in the same way with the frequency range system signal;
The electric bridge combiner-divider, for each independently is equipped with the frequency range system signal, two described down link signals with the frequency range system signal are closed the road become the output of at least one road, or, will go signal at least on the way along separate routes and in two described up links of feed-in with the frequency range system signal.
2, same-frequency band combination and shunt circuit composite unit according to claim 1 is characterized in that: in the up link and down link with frequency range system signal together, its employed separately isolated location inserts loss by the difference of link under making.
3, same-frequency band combination and shunt circuit composite unit according to claim 2 is characterized in that: described isolated location adopts circulator to realize.
4, same-frequency band combination and shunt circuit composite unit according to claim 3 is characterized in that: each isolated location adopts the cascade of at least two circulator phases.
5, a kind of same-frequency band combination road multiplexer composite device is characterized in that: comprises at least two as any described same-frequency band combination and shunt circuit composite unit in the claim 1 to 4, is respectively applied for and handles the different system frequency band signals, and comprise,
The frequency range combiner-divider closes road feed-in antenna-feedback system with the down link and the up link of the output of each electric bridge combiner-divider in each same-frequency band combination and shunt circuit composite unit, or, the signal of antenna-feedback system feed-in is shunted to each electric bridge mixer.
6, same-frequency band combination according to claim 5 road multiplexer composite device, it is characterized in that: exist two described frequency ranges to close the road splitter, each closes output port of road splitter with each electric bridge and is connected, and two frequency ranges close that one of each self-forming of road splitter comprises identical downstream signal and different descending output port on phase place.
7, a kind of same-frequency band combination road complex method along separate routes carries out signal transmission between base station and the antenna-feedback system to two-way with the system signal of frequency range, it is characterized in that:
When signal downlink, respectively two-way is isolated down link from the downstream signal of the same frequency range of base station, two down links are made different insertion losses, both isolation is improved after, two downstream signals with frequency range are closed the road so that export antenna-feedback system to;
When signal uplink, the upward signal from antenna-feedback system is carried out shunt, be dispensed in two up links with the frequency range system signal, two up links are made different insertion losses, both isolation is improved after, be fed into the base station more respectively.
8, same-frequency band combination road shunt complex method according to claim 7, it is characterized in that: in down link and up link, the method that improves isolation adopts circulator to realize.
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| CN101572903B (en) * | 2009-06-09 | 2011-04-13 | 华为技术有限公司 | Signal reporting method, intermodulation performance testing method and system thereof |
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| CN102546035A (en) * | 2010-12-10 | 2012-07-04 | 中国移动通信集团广东有限公司 | Signal interference suppression device |
| CN102664694A (en) * | 2012-04-25 | 2012-09-12 | 中国联合网络通信有限公司广东省分公司 | Multi-band and multi-signal mixed inter-modulation interference analyzer and analyzing method thereof |
| CN105491579A (en) * | 2016-01-15 | 2016-04-13 | 国家电网公司 | Mobile communication system and mobile communication method in cable tunnel |
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| CN107968661A (en) * | 2017-12-29 | 2018-04-27 | 河南思维轨道交通技术研究院有限公司 | Signal handling equipment and signal transmission system |
| CN108400789A (en) * | 2017-02-06 | 2018-08-14 | 罗森伯格技术（昆山）有限公司 | Multisystem mixing platform and the method for improving multisystem mixing platform intermodulation |
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| CN101572903B (en) * | 2009-06-09 | 2011-04-13 | 华为技术有限公司 | Signal reporting method, intermodulation performance testing method and system thereof |
| CN102546035A (en) * | 2010-12-10 | 2012-07-04 | 中国移动通信集团广东有限公司 | Signal interference suppression device |
| WO2012079542A1 (en) * | 2010-12-17 | 2012-06-21 | 华为技术有限公司 | Doherty power amplifier |
| CN102664694A (en) * | 2012-04-25 | 2012-09-12 | 中国联合网络通信有限公司广东省分公司 | Multi-band and multi-signal mixed inter-modulation interference analyzer and analyzing method thereof |
| CN105491579A (en) * | 2016-01-15 | 2016-04-13 | 国家电网公司 | Mobile communication system and mobile communication method in cable tunnel |
| CN107800459A (en) * | 2016-08-31 | 2018-03-13 | 中国电信股份有限公司 | For the radio frequency remote unit RRU and path combining method across frequency range carrier aggregation |
| CN108400789A (en) * | 2017-02-06 | 2018-08-14 | 罗森伯格技术（昆山）有限公司 | Multisystem mixing platform and the method for improving multisystem mixing platform intermodulation |
| CN108400789B (en) * | 2017-02-06 | 2022-01-14 | 罗森伯格技术有限公司 | Multi-system combiner platform and method for improving inter-modulation of multi-system combiner platform |
| CN107968661A (en) * | 2017-12-29 | 2018-04-27 | 河南思维轨道交通技术研究院有限公司 | Signal handling equipment and signal transmission system |
| CN112134582A (en) * | 2020-09-15 | 2020-12-25 | 上海鸿晔电子科技股份有限公司 | Frequency hopping multiplexer and control method thereof |
| CN112134582B (en) * | 2020-09-15 | 2021-07-13 | 上海鸿晔电子科技股份有限公司 | Frequency hopping multiplexer and control method thereof |
| CN112234332A (en) * | 2020-10-15 | 2021-01-15 | 上海三吉电子工程有限公司 | Radio frequency combiner |
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