CN202696611U - Multi-frequency micro-power optical fiber remote terminal - Google Patents
Multi-frequency micro-power optical fiber remote terminal Download PDFInfo
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- CN202696611U CN202696611U CN2012202552741U CN201220255274U CN202696611U CN 202696611 U CN202696611 U CN 202696611U CN 2012202552741 U CN2012202552741 U CN 2012202552741U CN 201220255274 U CN201220255274 U CN 201220255274U CN 202696611 U CN202696611 U CN 202696611U
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Abstract
The utility model relates to the field of mobile communication, in particular to a multi-frequency micro-power optical fiber remote terminal. The remote terminal comprises a broadband optical transceiver, a radio frequency unit and a passive multi-frequency combiner, which are connected in sequence, wherein the radio frequency unit comprises a single-channel downlink radio frequency amplification link and a single-channel uplink radio frequency amplification link. The single-channel uplink and downlink radio frequency amplification links are adopted for the radio frequency unit, so that compared with a multi-frequency independent channel amplification design scheme, the multi-frequency micro-power optical fiber remote terminal has the advantages of simple circuit, small size, low power consumption and high universality. When a new frequency band is added, only the passive multi-frequency combiner is required to be replaced to support the new frequency band system, so that the expandability of the equipment is increased.
Description
Technical field
The utility model relates to moving communicating field, particularly a kind of multifrequency micropower optical fiber remote termination.
Background technology
Along with networking and the Client application of mobile communication are fast-developing, covering demand and the quality requirement of indoor signal are day by day vigorous, and traditional indoor distributed system is slightly inadequate aspect indoor degree of depth covering, so the application of some active indoor distributed systems occurred.Wherein adopting optical fiber is a kind of mainstream applications form wherein as the multifrequency micropower fiber plant of transfer resource.
The implementation of multi-frequency fiber micropower far-end generally has two kinds, a kind of is to adopt wide band light transmitting-receiving and the mode that frequency-division section independently amplifies to realize, this kind scheme advantage is that each frequency range has independently amplifying circuit and filtering device, isolation of system is good, but shortcoming is system pass and is directly proportional with the frequency range number, frequency range is more, corresponding amplifying circuit and filtering device are just more, so that hardware circuit area and number of devices are more during multiband, equipment volume and power consumption are larger, simultaneously newly-increased band spreading difficulty.The second is to adopt wide band light transmitting-receiving and passage to share the scheme of amplifying, then adopt the higher double antenna of isolation to cover, its advantage is that system configuration is simple, small volume, newly-increased band spreading is better, need not hardware and changes, its shortcoming is the isolation design difficulty between dual-mode antenna, in order to reach the requirement of isolation of system degree, must affect dual-mode antenna directivity and receiving sensitivity separately, a kind of scheme before the antenna cover successful is lower than in practical engineering application simultaneously.
The utility model content
The purpose of this utility model is to overcome the shortcoming and defect of prior art, provide a kind of equipment volume little, can expand, multifrequency micropower optical fiber remote termination that isolation is good.
The purpose of this utility model is achieved through the following technical solutions:
A kind of multifrequency micropower optical fiber remote termination comprises the wide band light transceiver, radio frequency unit, the passive multiplefrequency mixer that connect successively, and described radio frequency unit comprises that the downlink radio frequency of single channel amplifies the up radio frequency amplification link of link, single channel.
According to above-mentioned scheme of the present utility model, it can realize by the wide band light transceiver opto-electronic conversion (light-receiving) and the electric light conversion (light emission) of broadband signal, the light signal that the higher level equipment emission is come is converted to radiofrequency signal, also the radiofrequency signal of this equipment is converted to light signal and passes to higher level equipment, can also amplify link by the downlink radio frequency in the radio frequency unit, up radio frequency amplifies link, finish the two-way shared amplification of multi-band signal, the utility model volume is little, can expand, and by adopting passive multiplefrequency mixer to realize closing the road and separating of a plurality of frequency range uplink and downlink signals.
Therein among embodiment, described wide band light transceiver connects higher level equipment by optical fiber, described passive multiplefrequency mixer connects cover antenna, wherein, the covering principle of down link is: higher level equipment can arrive the wide band light transceiver with optical signal transmission through optical fiber, become the radiofrequency signal of multiband through photoelectric conversion, the radiofrequency signal of multiband enters the downlink in the radio frequency unit, through being amplified into passive multiplefrequency mixer, be radiated the space by cover antenna and carry out wireless signal and cover through closing behind the road, the ul transmissions principle is: the wireless signal of multiband receives and enters passive multiplefrequency mixer by cover antenna, enter radio frequency unit through closing the road after signal separation and the filtering, after the up amplification of multi-frequency band radio-frequency signal process single channel, opto-electronic conversion by the wide band light transceiver, multi-frequency band radio-frequency signal dress is changed to light signal, gives the equipment of upper level by optical fiber.
Therein among embodiment, described passive multiplefrequency mixer comprises the upstream filter of two above different frequency ranges, the downstream filter of two above different frequency ranges, described upstream filter is connected between the up input interface and output interface of passive multiplefrequency mixer, described downstream filter is connected between the descending input interface and output interface of passive multiplefrequency mixer, adopt this design, not only satisfied the isolation design between the up-downgoing system, and support the cover antenna of omnidirectional to use so that multifrequency shares the amplification system antenna port, significantly promote on signal cover and effect than two-antenna scheme.
Among embodiment, described wide band light transceiver comprises the photoelectric converting device that carries out light signal and the two-way conversion of the signal of telecommunication therein.
Description of drawings
Fig. 1 is the structural representation of the multifrequency micropower optical fiber remote termination of the utility model embodiment;
Fig. 2 is the application schematic diagram of the multifrequency micropower optical fiber remote termination of the utility model embodiment.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Embodiment
Referring to shown in Figure 1, it is the structural representation of the multifrequency micropower optical fiber remote termination of the utility model embodiment, the multifrequency micropower optical fiber remote termination of the utility model embodiment includes the wide band light transceiver 101 that connects successively, radio frequency unit 102, passive multiplefrequency mixer 103, radio frequency unit 102 comprises that the downlink radio frequency of single channel amplifies link, the up radio frequency of single channel amplifies link, wherein, radio frequency unit 102 adopts the downlink radio frequency of single channel to amplify link, the up radio frequency of single channel amplifies link, can obviously reduce the volume of optical fiber remote termination, wide band light transceiver 101 is used for realizing that the opto-electronic conversion (light-receiving) of broadband signal and electric light dress change (light emission), radio frequency unit 102 comprises the descending amplification link of single channel, the up radio frequency of single channel amplifies link, finish the two-way shared amplification of multi-band signal, and by adopting passive multiplefrequency mixer 103, realize closing the road and separating of a plurality of frequency range uplink and downlink signals, can obviously strengthen the extensibility of equipment, and satisfied the insulated degree requirement of system, and can make equipment finally by an aerial radiation with receive the spacing wireless signal.
Therein among embodiment, referring to shown in Figure 2, wide band light transceiver 101 connects higher level equipment 104 by optical fiber, passive multiplefrequency mixer 103 connects cover antenna 105, wherein, the covering principle of down link is: higher level equipment 104 can arrive wide band light transceiver 101 with optical signal transmission through optical fiber, become the radiofrequency signal of multiband through photoelectric conversion, the radiofrequency signal of multiband enters the downlink in the radio frequency unit 102, through being amplified into passive multiplefrequency mixer 103, be radiated the space by cover antenna 105 and carry out wireless signal and cover through closing behind the road, the ul transmissions principle is: the wireless signal of multiband receives and enters passive multiplefrequency mixer 103 by cover antenna 105, enter radio frequency unit 102 through closing the road after signal separation and the filtering, after the up amplification of multi-frequency band radio-frequency signal process single channel, electric light conversion by wide band light transceiver 101 is changed to light signal with multi-frequency band radio-frequency signal dress, gives the equipment 104 of upper level by optical fiber.
Therein among embodiment, passive multiplefrequency mixer 103 can comprise the upstream filter of two above different frequency ranges, the downstream filter of two above different frequency ranges, upstream filter is connected between the up input interface and output interface of passive multiplefrequency mixer, downstream filter is connected between the descending input interface and output interface of passive multiplefrequency mixer, wherein output interface is generally for connecting cover antenna 104, adopt this design, not only satisfied the isolation design between the up-downgoing system, and support the cover antenna of omnidirectional, significantly promote on signal cover and effect than two-antenna scheme.
In addition, wide band light transceiver 101 comprises the photoelectric converting device that carries out light signal and the two-way conversion of the signal of telecommunication, and the light signal that is used for the higher level equipment emission is come is converted to radiofrequency signal, also the radiofrequency signal of this equipment is converted to light signal and passes to higher level equipment.
For the ease of to understanding of the present utility model, the below is take a kind of double frequency micropower optical fiber remote termination as example, the utility model is done being described in further detail, but this concrete example do not consist of the restriction to execution mode of the present utility model.
A kind of double frequency (GSM1800 and WCDMA2100) micropower optical fiber remote termination, comprise wide band light transceiver and radio frequency unit, passive multiplefrequency mixer, wherein, the wide band light transceiver is connected with higher level equipment by optical fiber, radio frequency unit is connected with passive multiplefrequency mixer with the wide band light transceiver respectively, and passive multiplefrequency mixer is connected with cover antenna.
The wide band light transceiver is used for realizing opto-electronic conversion (light-receiving) and the electric light conversion (light emission) of broadband rf signal, with higher level equipment emission and the light signal that comes is converted to radiofrequency signal, also the radiofrequency signal of this equipment is converted to light signal and passes to higher level equipment.Radio frequency unit comprises that the downlink radio frequency of single channel amplifies the up radio frequency amplification link of link and single channel, finishes the two-way shared amplification of multi-band signal.Passive multiplefrequency mixer is realized closing the road and separating of GSM1800 frequency range and WCDMA2100 frequency range uplink and downlink signals, and realizes the frequency range isolation of descending and uplink port.
The operation principle of the double frequency micropower optical fiber remote termination in this concrete example comprises that down link covers principle and ul transmissions principle, and preferred operation principle is specific as follows:
Down link covers principle: the light signal that comprises GSM1800 and WCDMA2100 information from higher level equipment by Optical Fiber Transmission to the wide band light transceiver, become the radiofrequency signal of GSM1800 and WCDMA2100 through opto-electronic conversion, GSM1800 and WCDMA2100 radiofrequency signal enter the downlink in the radio frequency unit, through being amplified into passive multiplefrequency mixer, being radiated the space by cover antenna and carrying out wireless signal and cover through closing behind the road;
The wireless signal of ul transmissions principle: GSM1800 and WCDMA2100 receives and enters passive multiplefrequency mixer by cover antenna, enter radio frequency unit through closing the road after signal separation and the filtering, after GSM1800 and the up amplification of WCDMA2100 radiofrequency signal process single channel, opto-electronic conversion by the wide band light transceiver, multi-frequency band radio-frequency signal dress is changed to light signal, gives the equipment of upper level by optical fiber.
The utility model has following advantage and effect with respect to prior art:
(1) the present invention has used passive multiplefrequency mixer in system, the multiple-frequency signal of up-downgoing path has been carried out filtering and synthetic, satisfied the isolation between the up-downgoing system, final equipment is by an aerial radiation and receive the spacing wireless signal, the system that adopts double antenna to cover scheme compares, and coverage effect promotes significantly;
(2) the present invention adopts the design of up-downgoing unipath at the radio frequency amplifier section, with adopt multiband respectively the scheme of independent path Enlargement Design to compare circuit simple, volume is little, power consumption is little, versatility is good, and when future, newly-increased frequency range accessed, only need to change passive multiplefrequency mixer and can support new frequency range.
The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (4)
1. a multifrequency micropower optical fiber remote termination is characterized in that, comprises the wide band light transceiver, radio frequency unit, the passive multiplefrequency mixer that connect successively, and described radio frequency unit comprises that the downlink radio frequency of single channel amplifies the up radio frequency amplification link of link, single channel.
2. multifrequency micropower optical fiber remote termination according to claim 1 is characterized in that, described wide band light transceiver connects higher level equipment by optical fiber, and described passive multiplefrequency mixer connects cover antenna.
3. multifrequency micropower optical fiber remote termination according to claim 1 and 2, it is characterized in that, described passive multiplefrequency mixer comprises the upstream filter of two above different frequency ranges, the downstream filter of two above different frequency ranges, described upstream filter is connected between the up input interface and output interface of passive multiplefrequency mixer, and described downstream filter is connected between the descending input interface and output interface of passive multiplefrequency mixer.
4. multifrequency micropower optical fiber remote termination according to claim 3 is characterized in that, described wide band light transceiver comprises the photoelectric converting device that carries out light signal and the two-way conversion of the signal of telecommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202552741U CN202696611U (en) | 2012-05-31 | 2012-05-31 | Multi-frequency micro-power optical fiber remote terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202552741U CN202696611U (en) | 2012-05-31 | 2012-05-31 | Multi-frequency micro-power optical fiber remote terminal |
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| Publication Number | Publication Date |
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| CN202696611U true CN202696611U (en) | 2013-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012202552741U Expired - Lifetime CN202696611U (en) | 2012-05-31 | 2012-05-31 | Multi-frequency micro-power optical fiber remote terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105813093A (en) * | 2016-03-30 | 2016-07-27 | 武汉虹信通信技术有限责任公司 | Separated antenna coverage system for multi-service signal deep coverage and networking |
-
2012
- 2012-05-31 CN CN2012202552741U patent/CN202696611U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105813093A (en) * | 2016-03-30 | 2016-07-27 | 武汉虹信通信技术有限责任公司 | Separated antenna coverage system for multi-service signal deep coverage and networking |
| CN105813093B (en) * | 2016-03-30 | 2019-10-25 | 武汉虹信通信技术有限责任公司 | Separated antenna for the covering networking of multi-service signal depth covers system |
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Granted publication date: 20130123 |
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| CX01 | Expiry of patent term |