CN103686986A - An apparatus and a method for forwarding a global positioning system GPS signal - Google Patents
An apparatus and a method for forwarding a global positioning system GPS signal Download PDFInfo
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- CN103686986A CN103686986A CN201210362364.5A CN201210362364A CN103686986A CN 103686986 A CN103686986 A CN 103686986A CN 201210362364 A CN201210362364 A CN 201210362364A CN 103686986 A CN103686986 A CN 103686986A
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Abstract
The invention discloses an apparatus and a method for forwarding a global positioning system GPS signal. A GPS receiving antenna disposed outside a signal coupling device receives a GPS signal and transmits the GPS signal to a transmitting antenna arranged in the signal coupling device. The transmitting antenna transmits the GPS signal in signal coupling space. A receiving signal disposed in the signal coupling device receives the GPS signal and forwards the GPS to a base station. The base station extracts a clock signal in the GPS signal and carries out clock synchronization. The apparatus and the method for forwarding a GPS signal forwards the GPS signal so as to share the GPS signal, thereby saving cost, decreasing engineering implement difficulty, and enhancing operation stability and security.
Description
Technical field
The present invention relates to base station clock synchronization technical field, relate in particular to a kind of global position system GPS signal retransmission unit and method.
Background technology
Mobile communications network, CDMA(Code-Division Multiple Access for example: code division multiple access) network, it is the network of a needs height clock synchronous, must adopt accurate clock signal to carry out synchronously, just can guarantee the normal work of the code division multiple access systems such as the necessary short code of cdma system, long code, WALSHCODE (Walsh code), complete the operation flow such as initiation, paging, switching of calling.
At present, cdma system is comprised of switching network, radio base station controller BSC, wireless base station BTS, antenna transmission system conventionally.Wherein, need the wireless base station of precise synchronization, all adopt GPS(Global Position System: global positioning system) mode is obtained clock, every cover wireless base station need to adopt a set of complete gps system, can not share each other.At present, the spread of indoor distributed system and application in network, cause the BBU(Building Base band Unite as wireless base station network element: indoor baseband processing unit) equipment is laid in the important office points such as module office, branch office, core office in a large number, not only consume in a large number the materials such as antenna feeder, and roof, the hoistway of office point, the hole that rolls off the production line are occupied by a large amount of GPS and antenna feeder, affected the attractive in appearance of the dilatation in later stage and office point; Part website, due to increasing of feeder line, has also affected owner, periphery resident's relation, has caused unnecessary panic and worry to radiation.
Summary of the invention
In view of this, the technical problem that the present invention will solve is to provide a kind of global position system GPS signal retransmission unit, by gps signal is forwarded, realizes sharing gps signal.
A global position system GPS signal retransmission unit, comprising: signal coupling apparatus, be arranged on GPS reception antenna outside described signal coupling apparatus, be arranged on transmitting antenna and reception antenna in described signal coupling apparatus; Described signal coupling apparatus is airtight screening arrangement; Described GPS reception antenna is used for receiving gps signal, and sends described gps signal to described transmitting antenna; Wherein, described in each, GPS reception antenna is connected with a transmitting antenna; The number of described GPS reception antenna and described transmitting antenna is all one or more; Described transmitting antenna is for launching described gps signal in signal coupling space; Described reception antenna is used for receiving described gps signal in signal coupling space, and described gps signal is forwarded to base station; The clock signal in described gps signal is extracted in described base station, carries out clock synchronous; The number of described reception antenna is more than 2 or 2.
According to gps signal retransmission unit of the present invention embodiment, further, lightning protection unit, the surge current of the gps signal receiving for GPS reception antenna described in filtering.
According to gps signal retransmission unit of the present invention embodiment, further, also comprise: receive retransmission unit, for receiving described gps signal from lightning protection unit, described gps signal is carried out to low pass and amplify laggard line linearity amplification processing, and the gps signal after processing is sent to described transmitting antenna.
According to gps signal retransmission unit of the present invention embodiment, further, described transmitting antenna and described reception antenna are all physical isolation.
According to gps signal retransmission unit of the present invention embodiment, further, described in each, reception antenna is connected with the BBU equipment of a base station, and described reception antenna is sent to by the gps signal receiving the BBU equipment that reception antenna connects therewith; Described BBU equipment extracts the clock signal in described gps signal, carries out clock synchronous.
According to gps signal retransmission unit of the present invention embodiment, further, the number of described GPS reception antenna and transmitting electric wire is all 2, and the number of described reception antenna is 10.
The technical problem that the present invention will solve is to provide a kind of global position system GPS signal retransmission method, by gps signal is forwarded, realizes sharing gps signal.
A global position system GPS signal retransmission method, comprising: the GPS reception antenna being arranged on outside signal coupling apparatus receives gps signal, and described gps signal is sent to and is arranged on transmitting antenna in described signal coupling apparatus; Wherein, described signal coupling apparatus is airtight screening arrangement; Described in each, GPS reception antenna is connected with a transmitting antenna; The number of described GPS reception antenna and described transmitting antenna is one or more; Described transmitting antenna is launched described gps signal in signal coupling space; The reception antenna being arranged in described signal coupling apparatus receives described gps signal, and described gps signal is forwarded to base station; The clock signal in described gps signal is extracted in described base station, carries out clock synchronous; Wherein, the number of described reception antenna is more than 2 or 2.
According to gps signal retransmission method of the present invention embodiment, further, the surge current of the gps signal that GPS reception antenna receives described in lightning protection unit filtering.
According to gps signal retransmission method of the present invention embodiment, further, receive retransmission unit and receive described gps signal from lightning protection unit, described gps signal is carried out sending line linearity amplification processing to after low pass amplification, and the gps signal after processing is sent to described transmitting antenna.
According to gps signal retransmission method of the present invention embodiment, further, described transmitting electric wire and described reception antenna are all physical isolation.
According to gps signal retransmission method of the present invention embodiment, further, described in each, receive electric wire and be connected with the BBU equipment of a base station, described reception antenna is sent to by the gps signal receiving the BBU equipment that reception antenna connects therewith; Described BBU equipment extracts the clock signal in described gps signal, carries out clock synchronous.
According to gps signal retransmission method of the present invention embodiment, further, the number of described GPS reception antenna and transmitting electric wire is all 2, and the number of described reception antenna is 10.
Gps signal retransmission unit of the present invention and method, by gps signal is forwarded, realization is shared gps signal, has saved cost, has reduced the difficulty of engineering construction, has improved stability and the fail safe of operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is according to the schematic diagram of gps signal retransmission unit of the present invention embodiment;
Fig. 2 is for according to the schematic diagram of an embodiment of the gps signal retransmission unit that is arranged on base station of the present invention;
Fig. 3 is according to the structural representation of the reception retransmission unit in gps signal retransmission unit of the present invention embodiment;
Fig. 4 is according to the flow chart of gps signal retransmission method of the present invention embodiment.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention is wherein described.Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.Below in conjunction with each figure and embodiment, technical scheme of the present invention is carried out to many-sided description.
Split-second precision benchmark has become one of the basic guarantee platform in the fields such as communication, electric power, radio and television, safety monitoring, Industry Control.GPS can provide high accuracy, round-the-clock, round-the-clock navigation, location and time service service, time service excellent performance.The equipment such as communication, electric power, radio and television, safety monitoring, Industry Control can obtain standard clock signal information from gps satellite.
Fig. 1 is according to the schematic diagram of gps signal retransmission unit of the present invention embodiment.As shown in the figure, global position system GPS signal retransmission unit comprises: signal coupling apparatus 15, be arranged on GPS reception antenna 111,112 outside signal coupling apparatus, be arranged on transmitting antenna 121,122 and reception antenna 131,132,133,134,135 in signal coupling apparatus.Transmitting antenna can be launched gps signal, and reception antenna can receive gps signal." GPS reception antenna " herein for distinguishing the reception antenna that is arranged on different parts, can be a kind of antenna with " reception antenna ".
Transmitting antenna 121,122 is launched gps signal in signal coupling space.Reception antenna 131,132,133,134,135 is for receiving gps signal in signal coupling space, and gps signal is forwarded to base station 141,142,143,144,145.What be connected with reception antenna can be that each on base station need to obtain gps signal parts or the device of lock in time.The clock signal that extract in gps signal base station 141,142,143,144,145, carries out clock synchronous; The number of reception antenna is more than 2 or 2.
The surge current of the gps signal that according to one embodiment of present invention, lightning protection unit 161,162 filtering GPS reception antennas receive.Lightning current is a kind of surge current electricity; circuit is being struck by lightning and usually can be being produced very high switching overvoltage connecting, while disconnecting inductive load or bulk loads; this instantaneous overvoltage (or overcurrent) is called surge voltage (or surge current), is that a kind of transition is disturbed.
Receive retransmission unit 171,172 and receive gps signal from lightning protection unit, gps signal is carried out to low pass and amplify laggard line linearity amplification processing, and the gps signal after processing is sent to transmitting antenna 121,122.Transmitting antenna and reception antenna are all physical isolation.According to an embodiment, lightning protection unit and receive retransmission unit with GPS reception antenna for corresponding one by one.GPS reception antenna 111,112 is connected to through the identical lightning protection unit 161,162 of 2 covers the reception retransmission unit 171,172 that 2 covers are identical respectively.
According to one embodiment of present invention, each reception antenna is connected with the BBU equipment of a base station, and reception antenna is sent to by the gps signal receiving the BBU equipment that reception antenna connects therewith; BBU equipment extracts the clock signal in gps signal, carries out clock synchronous.The number of GPS reception antenna and transmitting antenna is 2, and the number of reception antenna is 10.According to an embodiment, the number of GPS reception antenna and transmitting antenna, and the number of reception antenna is according to actual requirement of engineering setting, to guarantee that all reception antennas can receive the gps signal that transmitting antenna sends smoothly.
Gps signal retransmission unit of the present invention, is shared and is realized the shared gps antenna of multiple devices by gps signal, reduces with location gps antenna quantity, solves construction difficult problem, simplifies dilatation step.Can receive aerial synchronizing signal by gps antenna, for example, adopt the gps antenna input that 2 covers are identical, this 2 cover signal can be worked simultaneously or work alone separately, for downstream component provides stable gps signal input.
Treated gps signal forwards with wireless mode in signal coupling space by emitter.Signal coupling space is a space that shielding properties is good, in this shielding space, by a plurality of reception antennas (GPS reception antenna), gps signal is carried out to Space Coupling, finally by a plurality of reception antennas in the same space, received, completed the whole process that receives and forward and share.Each reception antenna exports the signal obtaining to outside respectively, for distinct device, uses, and completes many complete equipments sharing gps signal.
In the process that receives and forward, transmitting antenna and reception antenna are physically-isolated, so to the not restriction of the quantity of reception antenna, as long as the position of placing license, the quantity of reception antenna in theory can be unrestricted.And due to space isolation, lightning protection effect is highly significant.Thunderbolt or surge current induced current cannot be isolated and be imported into rear class by space.In addition, above shell, be designed with significant indicator light, the operating state of indication mechanism directly perceived.
In existing technology, often adopt 2 kinds of modes to carry out gps clock distribution, a kind of is internal clocking apportion design, this mode be gps signal is received by digital receiver and demodulation, computing after obtain the clock signal of base band, and the clock signal of base band is delivered to digital circuit distributor, in internal system, carry out clock distribution, to reach multiple host, share the object of gps clock.As the manufacturers design such as MOTOROLA are crossed this type systematic, if GPS receiver or gps antenna go wrong, cause whole clock generation problem.Another kind of mode is direct-connected apportion design, and GPS is directly distributed by straight-through threeway, and DC feedback and signal transmission are carried out to direct-coupling simultaneously, transfers to gps antenna.
Adopting the advantage of first kind of way is that reliability is high, and allocative efficiency is high, and shortcoming is undue dependence and single GPS receiver, very large to the dependence of hardware producer, if producer does not design at the beginning of development system, just cannot apply this method and carry out GPS distribution, applicable surface is narrow.It is exactly simple adopting the advantage of second method, shortcoming is that system is too simple, multichannel feeding circuit is without isolation, antenna feeder loop is straight-through, cause exerting an influence mutually, Ruo Yi road receiving loop breaks down, and directly causes not working of whole system, based on above characteristic, direct distribution method can only be applied to the occasion that 2 road GPS distribute at present.
Gps signal retransmission unit of the present invention can be realized input and output region isolation, lightning-arrest effective, and the fault of any one apparatus of output terminal only can affect equipment self, can not cause and disturbs or whole system is quit work other equipment.It is large that GPS shares quantity, is designed at present 2 minutes 10, can expand leeway large.This equipment is also significant to the amplification of gps signal, and in gps antenna position, the extreme applications such as not good, can obtain good distribution effects.
Fig. 2 is for according to the schematic diagram of an embodiment of the gps signal retransmission unit that is arranged on base station of the present invention; As shown in the figure, the structure of more common base station comprises base station controller BSC (Base Station Controller), indoor baseband processing unit BBU, RRU(Radio Remote Unit: Remote Radio Unit), handheld terminal MS, and the mode that wherein adopts optical fiber to connect between BSC, BBU and RRU.Gps signal retransmission unit is connected with the BBU equipment of base station, and the reception antenna of gps signal retransmission unit is sent to by the gps signal receiving the BBU equipment that reception antenna connects therewith, realizes sharing of gps signal.BBU equipment extracts the clock signal in gps signal, carries out clock synchronous.
Fig. 3 is according to the structural representation of the reception retransmission unit in gps signal retransmission unit of the present invention embodiment.As shown in the figure, receiving retransmission unit 32 comprises: coupling is every straight unit 321,325, one-level amplifying unit 322, secondary amplifying unit 323, output filtering unit 324 and feedback control unit 326.Coupling receives every straight unit 321 the GPS wire size that GPS reception antenna 31 receives, and cut off direct current, gps signal is through one-level amplifying unit 322, secondary amplifying unit 323, output filtering unit 324, feedback control unit 326, coupling, every the processing of straight unit 325, send to transmitting antenna 33 by the gps signal of processing.According to an embodiment, one-level amplifying unit 322 is low-pass amplifier, and secondary amplifying unit 323 is linear amplifier.By the amplification to gps signal, make the extreme applications such as not good in gps antenna position, can obtain good reception and distribution effects.
Fig. 4 is according to the flow chart of gps signal retransmission method of the present invention embodiment.As shown in the figure:
Wherein, signal coupling apparatus is airtight screening arrangement; Each GPS reception antenna is connected with a transmitting antenna; The number of GPS reception antenna and transmitting antenna is one or more;
The surge current of the gps signal that according to one embodiment of present invention, lightning protection unit filtering GPS reception antenna receives.Receive retransmission unit and receive gps signal from lightning protection unit, gps signal is carried out sending line linearity amplification processing to after low pass amplification, and the gps signal after processing is sent to transmitting antenna.Each reception antenna is connected with the BBU equipment of a base station, and reception antenna is sent to by the gps signal receiving the BBU equipment that reception antenna connects therewith; BBU equipment extracts the clock signal in gps signal, carries out clock synchronous.
Gps signal retransmission unit of the present invention and method are through actual Project Realization, and stable performance, receives star good, drive test and test calls are normal, have reached design objective requirement, have realized a plurality of equipment sharing gps signal, save cost, improved the stability of operation.
May realize in many ways method and system of the present invention.For example, can realize method and system of the present invention by any combination of software, hardware, firmware or software, hardware, firmware.The said sequence that is used for the step of method is only in order to describe, and the step of method of the present invention is not limited to above specifically described order, unless otherwise specified.In addition, in certain embodiments, can be also the program being recorded in recording medium by the invention process, these programs comprise for realizing the machine readable instructions of the method according to this invention.Thereby the present invention also covers storage for carrying out the recording medium of the program of the method according to this invention.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment with various modifications that the present invention's design is suitable for special-purpose.
Claims (12)
1. a global position system GPS signal retransmission unit, is characterized in that, comprising:
Signal coupling apparatus, be arranged on GPS reception antenna outside signal coupling apparatus, be arranged on transmitting antenna and reception antenna in described signal coupling apparatus;
Described signal coupling apparatus is electromagnetic screen, has airtight signal coupling space;
Described GPS reception antenna is used for receiving gps signal, and sends described gps signal to described transmitting antenna; Wherein, described in each, GPS reception antenna is connected with a transmitting antenna; The number of described GPS reception antenna and described transmitting antenna is all one or more;
Described transmitting antenna is for launching described gps signal in signal coupling space;
Described reception antenna is used for receiving described gps signal in signal coupling space, and described gps signal is forwarded to base station; The clock signal in described gps signal is extracted in described base station, carries out clock synchronous;
The number of described reception antenna is more than 2 or 2.
2. gps signal retransmission unit as claimed in claim 1, is characterized in that, also comprises:
Lightning protection unit, the surge current of the gps signal receiving for GPS reception antenna described in filtering.
3. gps signal retransmission unit as claimed in claim 2, is characterized in that, also comprises:
Receive retransmission unit, for receive described gps signal from lightning protection unit, described gps signal is carried out to low pass and amplify laggard line linearity amplification processing, and the gps signal after processing is sent to described transmitting antenna.
4. gps signal retransmission unit as claimed in claim 1, is characterized in that:
Described transmitting antenna and described reception antenna are all physical isolation.
5. gps signal retransmission unit as claimed in claim 1, is characterized in that:
Described in each, reception antenna is connected with the BBU equipment of a base station, and described reception antenna is sent to by the gps signal receiving the BBU equipment that reception antenna connects therewith;
Described BBU equipment extracts the clock signal in described gps signal, carries out clock synchronous.
6. gps signal retransmission unit as claimed in claim 5, is characterized in that:
The number of described GPS reception antenna and transmitting antenna is all 2, and the number of described reception antenna is 10.
7. a global position system GPS signal retransmission method, is characterized in that, comprising:
The GPS reception antenna being arranged on outside signal coupling apparatus receives gps signal, and described gps signal is sent to and is arranged on transmitting antenna in described signal coupling apparatus;
Wherein, described signal coupling apparatus is electromagnetic screen, has airtight signal coupling space; Described in each, GPS reception antenna is connected with a transmitting antenna; The number of described GPS reception antenna and described transmitting antenna is one or more;
Described transmitting antenna is launched described gps signal in signal coupling space;
The reception antenna being arranged in described signal coupling apparatus receives described gps signal, and described gps signal is forwarded to base station; The clock signal in described gps signal is extracted in described base station, carries out clock synchronous;
Wherein, the number of described reception antenna is more than 2 or 2.
8. gps signal retransmission method as claimed in claim 7, is characterized in that:
The surge current of the gps signal that described in lightning protection unit filtering, GPS reception antenna receives.
9. gps signal retransmission method as claimed in claim 8, is characterized in that:
Receive retransmission unit and receive described gps signal from lightning protection unit, described gps signal is carried out sending line linearity amplification processing to after low pass amplification, and the gps signal after processing is sent to described transmitting antenna.
10. gps signal retransmission method as claimed in claim 7, is characterized in that:
Described transmitting antenna and described reception antenna are all physical isolation.
11. gps signal retransmission methods as claimed in claim 7, is characterized in that:
Described in each, reception antenna is connected with the BBU equipment of a base station, and described reception antenna is sent to by the gps signal receiving the BBU equipment that reception antenna connects therewith;
Described BBU equipment extracts the clock signal in described gps signal, carries out clock synchronous.
12. gps signal retransmission methods as claimed in claim 7, is characterized in that, also comprise:
The number of described GPS reception antenna and transmitting antenna is all 2, and the number of described reception antenna is 10.
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| CN201210362364.5A CN103686986B (en) | 2012-09-26 | 2012-09-26 | A kind of global position system GPS signal retransmission unit and method |
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| CN201210362364.5A CN103686986B (en) | 2012-09-26 | 2012-09-26 | A kind of global position system GPS signal retransmission unit and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105353388A (en) * | 2015-11-11 | 2016-02-24 | 陕西天基通信科技有限责任公司 | Multipath output conversion system with monitoring function |
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| WO2006005228A1 (en) * | 2004-07-13 | 2006-01-19 | Utstarcom Telecom Co., Ltd. | A interfacing method between remote unit and centralized bs |
| US7920441B2 (en) * | 2006-09-21 | 2011-04-05 | Atheros Communications, Inc. | Optimized time acquisition algorithm for low-power GPS-based watch applications |
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