CN102333323B - Wireless coverage system of high-speed carrier - Google Patents
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Abstract
The invention provides a wireless coverage system of a high-speed carrier, which is used for realizing signal coverage in the high-speed carrier. The wireless coverage system of the high-speed carrier comprises a forward antenna, a reverse antenna, a near-end module and at least one far-end module, wherein the near-end module and the at least one far-end module are both arranged in the carrier and are correspondingly connected through optical fibers, and the forward antenna and the reverse antenna are both arranged outside the high-speed carrier and are connected with the near-end module for receiving base station signals. The forward antenna and the reverse antenna respectively receive the external base station signals, the received base station signals are converted into optical signals by the near-end module and then transmitted to the corresponding at least one far-end module to be sent to a user. The signals sent by the user are converted into the optical signals by the at least one far-end module, then transmitted to the near-end module, and sent to an external base station through the forward antenna and the reverse antenna. With the wireless coverage system of the high-speed carrier, the communication quality of internal users is improved, and simultaneously the penetration loss of the signals is avoided.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of Wireless coverage system of high-speed carrier.
Background technology
At present, high-speed carriering tool is as communication network that bullet train used, as GSM (Global System of Mobile communication, global system for mobile communications) communication network normally arranges along the railway base station and repeater and carries out signal covering.
Yet, be thisly fixed on the base station of Along Railway and the coverage mode of repeater is still difficult to guarantee that the signal in every row bullet train all can cover, thereby affect the speech quality of the user in bullet train, cause communication equipment normally to use.And, due to speed train cars good airproof performance, when external signal enters interior, can there is certain penetration loss, thereby also can have influence on interior user's speech quality.
Summary of the invention
In view of this, the invention provides a kind of Wireless coverage system of high-speed carrier that can improve communication quality.
A kind of Wireless coverage system of high-speed carrier, it covers for realize signal a high-speed carriering tool inside, and described Wireless coverage system of high-speed carrier comprises a forward facing antenna, a reverse antenna, a local module and at least one remote end module.Described local module is all arranged on high-speed carriering tool inside with described at least one remote end module and is connected through optical fiber correspondence.Described forward facing antenna is all arranged on the outside of described high-speed carriering tool and is connected to receive base station signal with described local module with described reverse antenna.Described forward facing antenna and described reverse antenna receive respectively external base station signal and after described local module converts the described base station signal receiving to light signal, transfer to corresponding described at least one remote end module to be sent to user.After the signal that described at least one remote end module sends user converts light signal to, transfer to described local module, and be sent to external base station through described forward facing antenna and described reverse antenna.
Compared with prior art, Wireless coverage system of high-speed carrier provided by the invention, local module and remote end module are all arranged on to comprehensive covering that whole high-speed carriering tool signal is realized in high-speed carriering tool inside, thereby improved the communication quality of user in high-speed carriering tool, and, this system by forward facing antenna and oppositely antenna be arranged on high-speed carriering tool outside, thereby avoided the impact on speech quality of penetration loss that signal produces when penetrating high-speed carriering tool.
Accompanying drawing explanation
Fig. 1 is the module diagram of the Wireless coverage system of high-speed carrier that provides of first embodiment of the invention.
Fig. 2 is the local module schematic diagram of first embodiment of the invention high speed delivery vehicle wireless shrouding system.
Fig. 3 is the first remote end module schematic diagram of first embodiment of the invention high speed delivery vehicle wireless shrouding system.
Fig. 4 is the module diagram of the Wireless coverage system of high-speed carrier that provides of second embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Refer to Fig. 1, the Wireless coverage system of high-speed carrier 10 that first embodiment of the invention provides comprises a forward facing antenna 11a, reverse antenna 11b, local module 12 and eight remote end modules (the first remote end module 161 is to the 8th remote end module 168).In present embodiment, high-speed carriering tool is bullet train.Described local module 12 and described eight remote end modules are all arranged on bullet train inside, described forward facing antenna 11a and described reverse antenna 11b be all arranged on the outside of described bullet train and with described local module 12 wired connections in order to receive base station signal.Be appreciated that forward facing antenna 11a and the outside that oppositely antenna 11b is arranged on two stature cars of bullet train all can.In present embodiment, the quantity correspondence of remote end module is set to eight, is appreciated that the quantity of remote end module also can be according to actual needs setting, and in addition, described forward facing antenna 11a can be connected by radio frequency cable with described local module 12 with described reverse antenna 11b.
Described local module 12 is connected through optical fiber successively with described the first remote end module 161, described the second remote end module 162, described the 3rd remote end module 163 and described the 4th remote end module 164, and described local module 12 is also connected through optical fiber successively with described the 5th remote end module 165, described the 6th remote end module 166, described the 7th remote end module 167 and described the 8th remote end module 168.
Described local module 12 comprises the first electrooptic switching element 1271, the first photoelectric conversion unit 1272, the second electrooptic switching element 1273 and the second photoelectric conversion unit 1274.Described the first electrooptic switching element 1271 and described the second electrooptic switching element 1273 convert to after light signal for the base station signal that described forward facing antenna 11a and described reverse antenna 11b are received, and are sent to described the first remote end module 161 and described the 5th remote end module 165.The light signal that described the first photoelectric conversion unit 1272 and described the second photoelectric conversion unit 1274 send for receiving described each remote end module, and convert described light signal to the signal of telecommunication and send to external base station by described forward facing antenna 11a and described reverse antenna 11b.
In present embodiment, the outside of described each remote end module 161～168 includes an antenna, for the signal receiving being sent to user and receiving subscriber signal.
Refer to Fig. 2, described local module 12 comprises forward direction duplexer 121a, opposition duplex device 121b, the first LNA unit 122a, the second LNA unit 122b, the first frequency mixer 123a, the second frequency mixer 123b, power detecting unit 124, A/D (Analog/Digital, mould/number) transducer 125, the first numerical frequency processing unit 126, near-end light transmitting-receiving module 127, D/A (Digital/Analog, D/A) transducer 128, three-mixer 129, branching unit 130, the first amplifier 131a and the second amplifier 131b.Wherein, described near-end light transmitting-receiving module 127 comprises the first electrooptic switching element 1271, the first photoelectric conversion unit 1272, the second electrooptic switching element 1273 and the second photoelectric conversion unit 1274.
Described forward direction duplexer 121a is connected successively with the input of described the first LNA unit 122a and described the first frequency mixer 123a, described opposition duplex device 121b is connected successively with the input of described the second LNA unit 122b and described the second frequency mixer 123b, and the output of described the first frequency mixer 123a and described the second frequency mixer 123b is all connected with described power detecting unit 124.The input of described power detecting unit 124, described A/D converter 125 and described the first numerical frequency processing unit 126 connects successively.The output of described the first numerical frequency processing unit 126 is connected with the output of described the second photoelectric conversion unit 1274 with input and described first photoelectric conversion unit 1272 of described the first electrooptic switching element 1271, described the second electrooptic switching element 1273, and the output of described the first numerical frequency processing unit 126 is also connected successively with described D/A converter 128, described three-mixer 129 and described branching unit 130.The output of described branching unit 130 is connected with the input of described the second amplifier 131b with described the first amplifier 131a respectively, and the output of described the first amplifier 131a and described the second amplifier 131b is connected with described opposition duplex device 121b with described forward direction duplexer 121a respectively.
Described forward direction duplexer 121a and described opposition duplex device 121b are respectively used to isolate corresponding signal from the base station signal that described forward facing antenna 11a and described reverse antenna 11b receive.In present embodiment, outside mobile communications network is GSM (Global System ofMobile communication, global system for mobile communications) standard signal, be appreciated that Wireless coverage system of high-speed carrier 10 can also adapt to other mobile communications networks as WCDMA, CDMA2000, TD-SCDMA network etc.
Described the first LNA unit 122a and described the second LNA unit 122b are respectively used to described isolated GSM signal correspondence to amplify processing.Described the first frequency mixer 123a and described the second frequency mixer 123b are respectively used to the two-way GSM signal correspondence after amplifying to carry out down-converted, to obtain two-way intermediate-freuqncy signal.Described power detecting unit 124 is for detection of the signal power of two-way intermediate-freuqncy signal and select power compared with great mono-road signal.Described A/D converter 125 converts digital signal to for selecting Yi road signal.Described the first numerical frequency processing unit 126 is for digital medium-frequency signal being carried out to Digital Down Convert processing on down direction to obtain baseband signal, and on up direction, baseband signal carried out to Digital Up Convert processing to obtain digital medium-frequency signal.Described the first electrooptic switching element 1271 and described the second electrooptic switching element 1273 are for converting the electrical signal to light signal.Described the first photoelectric conversion unit 1272 and described the second photoelectric conversion unit 1274 convert the signal of telecommunication to for the light signal that described local module 12 is received.Described D/A converter 128 is for converting the digital signal receiving to analog signal.Described three-mixer 129 is for analog signal is carried out to upconversion process, to obtain radiofrequency signal.Described branching unit 130 is for receiving Yi road signal and be divided into the signal of two-way same frequency.Described the first amplifier 131a and described the second amplifier 131b are for amplifying processing to signal.
Be appreciated that, described the first numerical frequency processing unit 126 comprises FPGA (FieldProgrammable Gata Array, primary scene programmable gate array), MCU (MicroControl Unit, micro-control unit), DSP (Digital Signal Processing, digital signal processor) and conventional peripheral circuit element.In present embodiment, described the first numerical frequency processing unit 126 carries out filtering processing by software (numeral) mode by signal.Also be appreciated that and can between described the first frequency mixer 123a, the second frequency mixer 123b and described power detecting unit 124 and between described the first numerical frequency processing unit 126 and near-end light transmitting-receiving module 127, filter be set for signal is carried out to filtering processing.
Refer to Fig. 3, described the first remote end module 161 comprises far-end light transmitting-receiving module 1612, the second numerical frequency processing unit 1613, D/A converter 1614, the 4th frequency mixer 1615, the 3rd amplifier 1616, duplexer 1617, the 3rd LNA unit 1618, the 5th frequency mixer 1619 and A/D converter 1620.Wherein, described far-end light transmitting-receiving module 1612 comprises the 3rd photoelectric conversion unit 1612a, the 3rd electrooptic switching element 1612b, the 4th electrooptic switching element 1612c and the 4th photoelectric conversion unit 1612d.
Described the second numerical frequency processing unit 1613, described D/A converter 1614, described the 4th frequency mixer 1615, described the 3rd amplifier 1616, described duplexer 1617, described the 3rd LNA unit 1618, described the 5th frequency mixer 1619 and described A/D converter 1620 connect to form closed-loop path successively, the input of described the second numerical frequency processing unit 1613 is also connected with described the 4th photoelectric conversion unit 1612d with described the 3rd photoelectric conversion unit 1612a, the output of described the second numerical frequency processing unit 1613 is also connected with described the 4th electrooptic switching element 1612c with described the 3rd electrooptic switching element 1612b.
Described the 3rd photoelectric conversion unit 1612a converts the signal of telecommunication to for the downlink optical signal that described the first remote end module 161 is sent.Described the 4th photoelectric conversion unit 1612d is converted to the signal of telecommunication for the uplink optical signal that described the second remote end module 162 is sent.Described the second numerical frequency processing unit 1613 is for baseband signal being carried out to Digital Up Convert processing on down direction to obtain digital medium-frequency signal, and on up direction, digital medium-frequency signal carried out to Digital Down Convert processing to obtain baseband signal.Described D/A converter 1614 is for converting the digital signal receiving to analog signal.Described the 4th frequency mixer 1615 is for carrying out upconversion process by analog if signal, to obtain radiofrequency signal.Described the 3rd amplifier 1616 is for amplifying radiofrequency signal processing.Described duplexer 1617 is for transmitting and receiving radiofrequency signal.Described the 3rd LNA unit 1618 is for amplifying radiofrequency signal.Described the 5th frequency mixer 1619 is for by the radiofrequency signal down-converted after amplifying, to obtain intermediate-freuqncy signal.Described A/D converter 1620 is for being converted to digital signal by intermediate-freuqncy signal.Described the 3rd electrooptic switching element 1612b is for sending to the uplink electrical signals of described local module 12 to be converted to light signal.Described the 4th electrooptic switching element 1612c is for converting the downlink electrical signal that is sent to described the second remote end module 162 to light signal.Be appreciated that described the second numerical frequency processing unit 1613 comprises FPGA, MCU, DSP and conventional peripheral circuit element, described the second numerical frequency processing unit 1613 carries out filtering processing by software mode by signal.Be appreciated that, also can between described the 4th frequency mixer 1615 and described the 3rd amplifier 1616 and between described the 3rd LNA unit 1618 and described the 5th frequency mixer 1619, filter be set for signal is carried out to filtering processing, described FPGA is also for carrying out delay compensation to signal.
Be appreciated that, described the second remote end module comprises a far-end light transmitting-receiving module, the far-end light transmitting-receiving module of described the second remote end module also comprises two photoelectric conversion units and two electrooptic switching elements, the light signal that described two photoelectric conversion units send for light signal that described the first remote end module 161 down directions are sent and described the 3rd remote end module 163 up directions converts respectively the signal of telecommunication to, described two electrooptic switching elements are for sending to the uplink electrical signals of described the first remote end module 161 and send to the downlink electrical signal of described the 3rd remote end module 163 to convert respectively light signal to, far-end light transmitting-receiving module signal processing mode in described each remote end module by that analogy, repeat no more.
In conjunction with Fig. 1 to Fig. 3, the signal process that in described Wireless coverage system of high-speed carrier 10, local module 12 and the first remote end module 161 are processed is as follows:
Down direction:
Described forward facing antenna 11a and described reverse antenna 11b receive respectively external base station signal and respectively correspondence send to described forward direction duplexer 121a and described opposition duplex device 121b, described forward direction duplexer 121a and described opposition duplex device 121b isolate respectively GSM signal from the base station signal receiving, and described two-way GSM signal is sent to respectively to described the first LNA unit 122a and described the second LNA unit 122b amplifies processing, described the first frequency mixer 123a and described the second frequency mixer 123b respectively by the GSM signal down-converted after amplifying to obtain two-way intermediate-freuqncy signal, described power detecting unit 124 is sent to described A/D converter 125 by power in the signal power of described two-way intermediate-freuqncy signal compared with great mono-tunnel intermediate-freuqncy signal and converts to and be sent to described the first numerical frequency processing unit 126 after digital signal again and carry out Digital Down Convert processing, to obtain baseband signal, described the first numerical frequency processing unit 126 also transfers to described the first electrooptic switching element 1271 according to CPRI agreement after to base band signal process to carry out after electric light is converted to light signal being sent to described the first remote end module 161.
Described the 3rd photoelectric conversion unit 1612a receives the light signal that the first electrooptic switching element 1271 of described near-end light transmitting-receiving module 127 sends and converts the signal of telecommunication to, described the second numerical frequency processing unit 1613 carries out Digital Up Convert again after first the signal of telecommunication being processed according to CPRI agreement processes and converts intermediate-freuqncy signal to and send to described D/A converter 1614, simultaneously, described the second numerical frequency processing unit 1613 also separates the signal of telecommunication receiving that riches all the way to be given described the 4th electrooptic switching element 1612c and converts the light transmitting-receiving module that is sent to described the second remote end module 162 after light signal to.Described D/A converter 1614 converts the intermediate-freuqncy signal receiving to be sent to described the 4th frequency mixer 1615 after analog signal and to carry out upconversion process to obtain radiofrequency signal to, and described the 3rd amplifier 1616 sends to user by described duplexer 1617 after will described radiofrequency signal amplifying.
Up direction:
Described duplexer 1617 receives to be sent into described the 3rd LNA unit 1618 after the signal that user sends and amplifies, signal after 1619 pairs of described amplifications of described the 5th frequency mixer carries out down-converted to obtain intermediate-freuqncy signal, described A/D converter 1620 converts described intermediate-freuqncy signal to be sent to described the second numerical frequency processing unit 1613 after digital signal and to carry out Digital Down Convert processing to, to obtain baseband signal, the second numerical frequency processing unit 1613 transfers to described the 3rd electrooptic switching element 1612b and converts the first photoelectric conversion unit 1272 in the near-end light transmitting-receiving module 127 that is sent to described local module 12 after light signal to by carrying out electric light after also processing according to CPRI agreement.Simultaneously, after the uplink optical signal that described the 4th photoelectric conversion unit 1612d sends described the second remote end module 162 converts the signal of telecommunication to and is modulated into, by described the second numerical frequency processing unit 1613, be sent to described the 3rd electrooptic switching element 1612b and convert to after light signal, then be sent to the first photoelectric conversion unit 1272 in the near-end light transmitting-receiving module 127 of local module 12.
The light signal that described the first photoelectric conversion unit 1272 and described the second photoelectric conversion unit 1274 send corresponding remote end module converts the signal of telecommunication to, and described the first numerical frequency processing unit 126 carries out Digital Up Convert after first the signal of telecommunication being processed according to CPRI agreement again and processes to form and be sent to described D/A converter 128 after intermediate-freuqncy signal and convert analog signal to, described three-mixer 129 by described simulation upconversion process to obtain radiofrequency signal, described branching unit 130 is sent to respectively described the first amplifier 131a and described the second amplifier 131b after described radiofrequency signal is divided into two-way same frequency signal, described the first amplifier 131a and described the second amplifier 131b are corresponding respectively after described two-way radiofrequency signal is amplified sends to external base station through described forward direction duplexer 121a and described opposition duplex device 121b.
Be appreciated that other each remote end modules 162～168 structure and and local module 12 between communication process roughly similar with the first remote end module 161, repeat no more herein.
Refer to Fig. 4, the Wireless coverage system of high-speed carrier 20 that it provides for second embodiment of the invention, the Wireless coverage system of high-speed carrier 10 of described Wireless coverage system of high-speed carrier 20 and the first execution mode is roughly the same, it is different from the structure of the connected mode of each far-end and the far-end light of each remote end module transmitting-receiving module that difference is that number, the near-end light of the near-end light transmitting-receiving module of local module are received and dispatched module, other structures are roughly the same, do not repeat them here.
Described Wireless coverage system of high-speed carrier 20 comprises a forward facing antenna 21a, reverse antenna 21b, local module 22 and eight remote end modules (the first remote end module 241 is to the 8th remote end module 248).Described local module 22 and described eight remote end modules are all arranged on bullet train inside, described forward facing antenna 21a and described reverse antenna 21b be all arranged on car of described bullet train outside and with described local module 22 wired connections in order to receive base station signal.The quantity of remote end module is set to eight, is appreciated that the quantity of remote end module also can be according to actual needs setting.In present embodiment, described forward facing antenna 21a can be connected with described local module 22 by radio frequency cable respectively with described reverse antenna 21b, and described local module 22 connects through optical fiber to described the 8th remote end module 248 is corresponding respectively with described the first remote end module 241.
Described local module 22 comprises that the first electrooptic switching element 2211 is to the 8th electrooptic switching element 2218 and the first photoelectric conversion unit 2221 to the 8th photoelectric conversion unit 2228.Described the first electrooptic switching element 2211 is connected through optical fiber with the input of described the first remote end module 241 to described the 8th remote end module 248 to the output of described the 8th electrooptic switching element 2218 is corresponding respectively, described the first photoelectric conversion unit 2221 to the input of described the 8th photoelectric conversion unit 2228 respectively correspondence be connected through optical fiber with the output of described the first remote end module 241 to described the 8th remote end module 248.
Described each electrooptic switching element 2211～2218 converts to after light signal and to be correspondingly respectively sent to described each remote end module 241～248 for the base station signal that described forward facing antenna 21a is received with described reverse antenna 21b.The light signal that described each photoelectric conversion unit 2221～2228 sends for receiving each remote end module 241～248 of described correspondence, and convert described light signal to the signal of telecommunication and send to external base station by described forward facing antenna 21a and described reverse antenna 21b.
Be appreciated that, the first remote end module 161 internal structures in described each remote end module 241～248 internal structures and the first execution mode are roughly the same, difference is, the far-end light transmitting-receiving module in described each remote end module 241～248 only comprises a photoelectric conversion unit and an electrooptic switching element.
Wireless coverage system of high-speed carrier provided by the invention, local module and each remote end module are all arranged on to comprehensive covering that whole high-speed carriering tool signal is realized in high-speed carriering tool inside, thereby improved the communication quality of user in high-speed carriering tool, and, this system by forward facing antenna and oppositely antenna be arranged on high-speed carriering tool outside, thereby avoided the impact on speech quality of penetration loss that signal produces when penetrating high-speed carriering tool.
Claims (11)
1. a Wireless coverage system of high-speed carrier, it covers for realize signal a high-speed carriering tool inside, described Wireless coverage system of high-speed carrier comprises a forward facing antenna, a reverse antenna, a local module and at least one remote end module, described local module is all arranged on high-speed carriering tool inside with described at least one remote end module and is connected through optical fiber correspondence, described forward facing antenna is all arranged on described high-speed carriering tool outside and is connected to receive base station signal with described local module with described reverse antenna, described forward facing antenna and described reverse antenna receive respectively external base station signal and after described local module converts the described base station signal receiving to light signal, transfer to corresponding described at least one remote end module to be sent to user, after converting light signal to, the signal that described at least one remote end module sends user transfers to described local module, and be sent to external base station through described forward facing antenna and described reverse antenna.
2. Wireless coverage system of high-speed carrier as claimed in claim 1, it is characterized in that, described local module comprises a near-end light transmitting-receiving module, described at least one remote end module comprises a far-end light transmitting-receiving module corresponding with described near-end light transmitting-receiving module, and described near-end light transmitting-receiving module is received and dispatched between module and is connected to carry out signal transmission through optical fiber with described far-end light.
3. Wireless coverage system of high-speed carrier as claimed in claim 2, it is characterized in that, described near-end light transmitting-receiving module comprises at least one electrooptic switching element and at least one photoelectric conversion unit, described far-end light transmitting-receiving module comprises two electrooptic switching elements and two photoelectric conversion units, at least one electrooptic switching element of described near-end light transmitting-receiving module and at least one photoelectric conversion unit respectively one of them photoelectric conversion unit and one of them electrooptic switching element of corresponding and described far-end light transmitting-receiving module are connected through optical fiber, another photoelectric conversion unit of described far-end light transmitting-receiving module and another electrooptic switching element are corresponding to be respectively connected through optical fiber with an electrooptic switching element and a photoelectric conversion unit of the adjacent far-end light transmitting-receiving module being connected successively.
4. Wireless coverage system of high-speed carrier as claimed in claim 3, it is characterized in that, described near-end light transmitting-receiving module comprises first electrooptic switching element, first photoelectric conversion unit, second electrooptic switching element and second photoelectric conversion unit, described Wireless coverage system of high-speed carrier comprises first remote end module connecting through optical fiber successively, second remote end module, the 3rd remote end module and the 4th remote end module, and the 5th remote end module connecting successively, the 6th remote end module, the 7th remote end module and the 8th remote end module, described the first electrooptic switching element and described the first photoelectric conversion unit are connected through optical fiber with described the first remote end module respectively, described the second electrooptic switching element and described the second photoelectric conversion unit are connected through optical fiber with described the 5th remote end module respectively.
5. Wireless coverage system of high-speed carrier as claimed in claim 4, it is characterized in that, the far-end light transmitting-receiving module of described the first remote end module comprises the 3rd photoelectric conversion unit and the 3rd electrooptic switching element, and the first electrooptic switching element of described near-end light transmitting-receiving module and described the first photoelectric conversion unit are corresponding to be respectively connected through optical fiber with described the 3rd photoelectric conversion unit and described the 3rd electrooptic switching element.
6. Wireless coverage system of high-speed carrier as claimed in claim 5, it is characterized in that, described local module also comprises a forward direction duplexer, an opposition duplex device, a first LNA unit, a second LNA unit, first frequency mixer, second frequency mixer, a power detecting unit, a D/A converting unit and a first numerical frequency processing unit, described forward direction duplexer and described opposition duplex device respectively with described the first LNA unit and described the second corresponding connection in LNA unit, described the first LNA unit is connected with described power detecting unit with described the second frequency mixer through described the first frequency mixer with described the second LNA unit is corresponding respectively, described power detecting unit is connected with described D/A switch unit and described the first numerical frequency processing unit, described the first numerical frequency processing unit is connected with described the first electrooptic switching element and described the second electrooptic switching element respectively, described forward direction duplexer and described opposition duplex device are isolated respectively and are sent to described the first LNA unit after corresponding signal and described the second LNA unit correspondence is amplified processing from received external base station signal, described the first frequency mixer and described the second frequency mixer are respectively used to the two paths of signals down-converted after amplifying to obtain transferring to described power detecting unit to carry out signal selection after two-way intermediate-freuqncy signal, described D/A switch unit transfers to described the first numerical frequency processing unit selected digital signal is carried out after Digital Down Convert is processed into baseband signal to transfer to described the first electrooptic switching element and described the second electrooptic switching element after selected signal is converted to digital signal.
7. Wireless coverage system of high-speed carrier as claimed in claim 6, it is characterized in that, described local module also comprises a D/A converter, a three-mixer, a branching unit, first amplifier and second amplifier, described the first photoelectric conversion unit and described the second photoelectric conversion unit are connected with described the first numerical frequency processing unit respectively, described the first numerical frequency processing unit also with described D/A converter, described three-mixer and described branching unit connect successively, described branching unit is connected with described the first amplifier and described the second amplifier respectively, described the first amplifier is connected with described opposition duplex device with described forward direction duplexer with described the second amplifier is corresponding respectively, the light signal that described the first photoelectric conversion unit and described the second photoelectric conversion unit receive the described remote end module from correspondence converts to and transfers to described the first numerical frequency processing unit the signal of telecommunication and carry out Digital Up Convert and be processed into intermediate-freuqncy signal, transferring to described D/A converter converts to and is sent to described three-mixer after analog signal and carries out upconversion process to obtain radiofrequency signal again, described branching unit carries out transferring to respectively after shunt described the first amplifier by described radiofrequency signal and amplifies by forward direction duplexer and send, and transfer to described the second amplifier and amplify by opposition duplex device and send.
8. Wireless coverage system of high-speed carrier as claimed in claim 5, it is characterized in that, described the first remote end module also comprises a second numerical frequency processing unit, a D/A converter, the 3rd amplifier, the 4th frequency mixer and a duplexer, described the 3rd photoelectric conversion unit, described the second numerical frequency processing unit, described D/A converter, described the 4th frequency mixer, described the 3rd amplifier and described duplexer connect successively, the light signal that described the 3rd photoelectric conversion unit receives the first electrooptic switching element from described near-end light transmitting-receiving module converts the signal of telecommunication to, described the second numerical frequency processing unit separates a road by the described signal of telecommunication and through Digital Up Convert, converts intermediate-freuqncy signal to and convert analog signal transmission to described the 4th frequency mixer by described D/A converter, described the 4th frequency mixer carries out upconversion process to obtain radiofrequency signal by the analog signal receiving, described the 3rd amplifier sends by described duplexer after described radiofrequency signal is amplified.
9. Wireless coverage system of high-speed carrier as claimed in claim 8, it is characterized in that, described the first remote end module also comprises a 3rd LNA unit, the 5th frequency mixer and an A/D converter, described the second numerical frequency processing unit, described D/A converter, described the 4th frequency mixer, described the 3rd amplifier, described duplexer, described the 3rd LNA unit, described the 5th frequency mixer and described A/D converter connect to form closed-loop path successively, described the second numerical frequency processing unit is also connected to described the first photoelectric conversion unit through described the 3rd electrooptic switching element, described the 3rd LNA unit transfers to described the 5th frequency mixer after amplifying for the corresponding signal that described duplexer is received and carries out down-converted to obtain intermediate-freuqncy signal, described A/D converter converts described intermediate-freuqncy signal to transfer to described the second numerical frequency processing unit after digital signal and carry out Digital Down Convert and convert baseband signal to, through described the 3rd electrooptic switching element, described baseband signal is converted to light signal and transfers to the first photoelectric conversion unit that described near-end light is received and dispatched module.
10. Wireless coverage system of high-speed carrier as claimed in claim 8, it is characterized in that, described the first remote end module also comprises the 4th electrooptic switching element and the 4th photoelectric conversion unit, described the second numerical frequency processing unit is connected with described the 4th electrooptic switching element and described the 4th photoelectric conversion unit respectively, described the second numerical frequency processing unit also transfers to described the second remote end module after another road signal of described the 3rd photoelectric conversion unit transmission of the reception separating is transferred to described the 4th electrooptic switching element again, described the 4th photoelectric conversion unit converts the light signal of described the second remote end module transmission to the signal of telecommunication and transfers to described the 3rd electrooptic switching element to export the first photoelectric conversion unit of described near-end light transmitting-receiving module to by described the second numerical frequency processing unit.
11. Wireless coverage system of high-speed carriers as claimed in claim 2, it is characterized in that, described Wireless coverage system of high-speed carrier comprises eight remote end modules, described near-end light transmitting-receiving module comprises eight electrooptic switching elements and eight photoelectric conversion units, described eight electrooptic switching elements and described eight photoelectric conversion units are corresponding to be respectively connected through optical fiber with described eight remote end modules, described forward facing antenna and described reverse antenna by the external base station signal of reception through each electrooptic switching element of described near-end light transmitting-receiving module carry out electric light conversion by Optical Fiber Transmission to each corresponding remote end module to be sent to user, the signal that described each remote end module sends user carries out electric light conversion and by optical fiber, transfers to respectively in the near-end light transmitting-receiving module of described local module each corresponding photoelectric conversion unit and carry out opto-electronic conversion and through described forward facing antenna and described reverse antenna, be sent to external base station again.
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| CN201110255479.XA CN102333323B (en) | 2011-08-31 | 2011-08-31 | Wireless coverage system of high-speed carrier |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599790A (en) * | 2009-01-08 | 2009-12-09 | 武汉盛华微系统技术股份有限公司 | A kind of intelligent micropower optical fiber wireless covering system |
| CN102118762A (en) * | 2011-04-01 | 2011-07-06 | 北京邮电大学 | One-way coverage scheme of wireless communication network for high-speed railway |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101599790A (en) * | 2009-01-08 | 2009-12-09 | 武汉盛华微系统技术股份有限公司 | A kind of intelligent micropower optical fiber wireless covering system |
| CN102118762A (en) * | 2011-04-01 | 2011-07-06 | 北京邮电大学 | One-way coverage scheme of wireless communication network for high-speed railway |
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