CN101494493B - Digital direct discharging station using digital microwave transmission - Google Patents
Digital direct discharging station using digital microwave transmission Download PDFInfo
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- CN101494493B CN101494493B CN2009100373237A CN200910037323A CN101494493B CN 101494493 B CN101494493 B CN 101494493B CN 2009100373237 A CN2009100373237 A CN 2009100373237A CN 200910037323 A CN200910037323 A CN 200910037323A CN 101494493 B CN101494493 B CN 101494493B
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Abstract
The invention discloses a digital repeater system which adopts digital microwave transmission, comprising a base station, a near-end microwave antenna, a remote-end microwave antenna, a relay end, a near-end outdoor equipment unit, a remote-end outdoor equipment unit and a capped end; the base is coupled with one end of the relay end by a base station antenna and the other end of the relay end is connected with the near-end microwave antenna by the near-end outdoor equipment unit; the remote-end microwave antenna is connected with the capped end by the remote-end outdoor equipment unit; and carrier signals which are transmitted and modulated are adopted between the capped end and the relay end by the ear-end outdoor equipment unit and the remote-end outdoor equipment unit. Digital radio-frequency signals which are transmitted by adopting the digital repeater system with digital microwave transmission are not easy to be affected by weather and the signal transmission is more stable; optical fiber does not need to be laid and the cost of network construction is reduced; and the lacking frequency resource of mobile communication is not occupied; and the digital repeater system comprises the relay end and the caped end and does not have requirements of transceiving isolation on transceiving microwave signals.
Description
Technical field
The present invention relates to a kind of digital direct discharging station, particularly a kind of digital direct discharging station that adopts the digital microwave transmission.
Background technology
In recent years, the mobile communication cause was very fast in China's development, and mobile communications network covers the whole nation basically.But, need carry out the covering of blind area, base station in order to build the mobile communication overlay network of high-quality.Direct discharging station is little owing to its investment, stable performance, and the speed of building a station is fast, and is low to environmental requirement, and installation and maintenance are easy, are a kind of equipment of good coverage hole.
The repeater of using at present mainly contains three types, optical fiber repeater, wireless discharging-directly station and frequency-shift repeater.Wherein optical fiber repeater comprises remote termination and near-end machine, its descending coupling base station signal, and up reception antenna signal is through optical fiber transmission signals between near-end machine and remote termination.Wireless discharging-directly station directly receives aerial base station signal, and amplifies, transmits.Frequency-shift repeater adopts shift frequency mode transmission signals.
But the construction of optical fiber repeater must have optical fiber; Wireless discharging-directly station is not divided into near-end machine and remote termination, and it is directly to receive aerial base station signal and amplify forwarding, so it must satisfy certain receive-transmit isolation; The signal of frequency-shift repeater system transmissions is operated in microwave frequency band; Its microwave frequency is than higher; Signal communication is subject to weather effect, and the signal of the frequency-shift repeater that has transmission is operated on the frequency of other communication systems, has taken the frequency resource of other communication systems.
Summary of the invention
The invention provides a kind of digital direct discharging station that adopts the digital microwave transmission, its system dynamics is big, and communication is not subject to weather effect, and does not take the frequency resource of other communication systems.
Technical scheme of the present invention is: a kind of digital direct discharging station that adopts the digital microwave transmission comprises base station, near-end microwave antenna, remote microwave antenna, relay, near-end Outdoor Device Unit, far-end Outdoor Device Unit and capped end;
Said base station is of coupled connections through an end of antenna for base station and said relay, and the other end of said relay is connected with the near-end microwave antenna through the near-end Outdoor Device Unit, and the remote microwave antenna is connected with said capped end through the far-end Outdoor Device Unit;
Said relay obtains the downstream signal of said base station through the antenna for base station coupling; Convert said downstream signal into digital signal; Again this digital signal down variable frequency is arrived baseband signal, convert this baseband signal into analog if signal then and output to said near-end Outdoor Device Unit; Said near-end Outdoor Device Unit is modulated to the microwaves corresponding frequency range with this analog if signal, launches through the near-end microwave antenna after the processing and amplifying then; Said far-end Outdoor Device Unit receives the microwave signal of near-end microwave antenna emission through the remote microwave antenna; This microwave signal is demodulated into analog if signal outputs to said capped end; Said capped end converts this analog if signal into baseband signal; Convert this baseband signal into analog signal again, and then upconvert to radiofrequency signal and launch through antenna;
Said capped end converts this radiofrequency signal into digital signal through the antenna received RF signal, again this digital signal down variable frequency is arrived baseband signal, converts this baseband signal into analog if signal then and outputs to said far-end Outdoor Device Unit; Said distal end Outdoor Device Unit is modulated to the microwaves corresponding frequency range with this analog if signal, launches through the remote microwave antenna then; Said near-end Outdoor Device Unit receives the microwave signal of remote microwave antenna emission through the near-end microwave antenna; This microwave signal is demodulated into analog if signal outputs to said relay; Said relay converts this analog if signal into baseband signal; Convert this baseband signal into analog signal again, then this analog signal is upconverted to upward signal and be coupled to said base station through antenna for base station.
The digital direct discharging station of employing digital microwave transmission of the present invention; With the radiofrequency signal digitlization; Adopt digital microwave wireless transmission between relay and capped end; Space transmission be modulation after the carrier wave that has digitized radio frequency signal, so Digitized Transmission radiofrequency signal of the present invention is not subject to the influence of weather, the signal transmission is more stable; Need not lay just ability transmission signals of optical fiber, reduce the networking expense; The microwave resource is the frequency resource that belongs to total in addition, its rich, and the digital direct discharging station of employing digital microwave transmission of the present invention adopts the microwave transmission signal, and it can not take lacking frequency resource of mobile communication; And the digital direct discharging station of employing digital microwave transmission of the present invention comprises relay and capped end, adopts the microwave wireless transmission of digital signals between relay and the capped end, on the transmitting-receiving microwave signal, does not have the requirement of receive-transmit isolation.
Description of drawings
Fig. 1 is the overall structure schematic diagram that the present invention adopts the digital direct discharging station of digital microwave transmission;
Fig. 2 is the structural principle block diagram of relay of the present invention;
Fig. 3 is the structural principle block diagram of capped end of the present invention.
Embodiment
The digital direct discharging station of employing digital microwave transmission of the present invention; With the radiofrequency signal digitlization; Adopt digital microwave wireless transmission between relay and capped end; Space transmission be modulation after the carrier wave that has digitized radio frequency signal, so Digitized Transmission radiofrequency signal of the present invention is not subject to the influence of weather, the signal transmission is more stable; Need not lay just ability transmission signals of optical fiber, reduce the networking expense; The microwave resource is the frequency resource that belongs to total in addition, its rich, and the digital direct discharging station of employing digital microwave transmission of the present invention adopts the microwave transmission signal, and it can not take lacking frequency resource of mobile communication; And the digital direct discharging station of employing digital microwave transmission of the present invention comprises relay and capped end, adopts the microwave wireless transmission of digital signals between relay and the capped end, on the transmitting-receiving microwave signal, does not have the requirement of receive-transmit isolation.
Below in conjunction with accompanying drawing and specific embodiment the present invention is done a detailed elaboration.
Like Fig. 1, the digital direct discharging station of employing digital microwave transmission of the present invention comprises base station, near-end microwave antenna, remote microwave antenna, relay, near-end Outdoor Device Unit (ODU), far-end Outdoor Device Unit (ODU) and capped end.The base station is of coupled connections through an end of antenna for base station and relay; The other end of relay is connected with the near-end microwave antenna through near-end Outdoor Device Unit (ODU); Remote microwave antenna and the wireless connections of near-end microwave antenna, the remote microwave antenna is connected with Digital Microwave repeater capped end through far-end Outdoor Device Unit (ODU).
The downlink working process of the digital direct discharging station of employing digital microwave transmission of the present invention is: said relay obtains the downstream signal of said base station through the antenna for base station coupling; Convert said downstream signal into digital signal; Again this digital signal down variable frequency is arrived baseband signal, convert this baseband signal into analog if signal then and output to said near-end Outdoor Device Unit (ODU); Said near-end Outdoor Device Unit (ODU) is modulated to the microwaves corresponding frequency range with this analog if signal, launches through the near-end microwave antenna after the processing and amplifying then; Said far-end Outdoor Device Unit (ODU) receives the microwave signal of near-end microwave antenna emission through the remote microwave antenna; This microwave signal is demodulated into analog if signal outputs to said capped end; Said capped end converts this analog if signal into baseband signal; Convert this baseband signal into analog signal again, and then upconvert to radiofrequency signal and launch through antenna.
The up course of work of the digital direct discharging station of employing digital microwave transmission of the present invention is: said capped end is through the antenna received RF signal; Convert this radiofrequency signal into digital signal; Again this digital signal down variable frequency is arrived baseband signal, convert this baseband signal into analog if signal then and output to said far-end Outdoor Device Unit (ODU); Said distal end Outdoor Device Unit (ODU) is modulated to the microwaves corresponding frequency range with this analog if signal, launches through the remote microwave antenna then; Said near-end Outdoor Device Unit (ODU) receives the microwave signal of remote microwave antenna emission through the near-end microwave antenna; This microwave signal is demodulated into analog if signal outputs to said relay; Said relay converts this analog if signal into baseband signal; Convert this baseband signal into analog signal again, then this analog signal is upconverted to upward signal and be coupled to said base station through antenna for base station.
In one embodiment; The downlink working process of the digital direct discharging station of employing digital microwave of the present invention transmission specifically can for: the relay obtains the downstream signal of base station through the antenna for base station coupling; This downstream signal is down-converted to analog if signal; Carrying out analog-to-digital conversion again is digital medium-frequency signal (can be digital medium-frequency signal with downstream signal through analog-to-digital conversion directly also), carries out Digital Down Convert processing (this Digital Down Convert is handled and is mainly extraction, filtering) then and is baseband signal; Afterwards this baseband signal is carried out framing and handle, the baseband signal after then this framing being handled is modulated to the analog if signal that is fit to near-end Outdoor Device Unit (ODU) transmission, at last this analog if signal is outputed to near-end Outdoor Device Unit (ODU); Near-end Outdoor Device Unit (ODU) is modulated to the microwaves corresponding frequency range with this analog if signal, launches through the near-end microwave antenna after the processing and amplifying then.
Far-end Outdoor Device Unit (ODU) receives the microwave signal that the near-end microwave antenna is launched through the remote microwave antenna, and this microwave signal is carried out the conversion of microwave to intermediate frequency, outputs to said capped end afterwards; The baseband signal that capped end is a framing with this signal demodulation process; Again the baseband signal of this framing is separated frame and be treated to baseband signal; Carry out Digital Up Convert processing (this Digital Up Convert is handled and is mainly filtering, interpolation processing) then and be digital medium-frequency signal; To carry out digital-to-analogue conversion be analog if signal to this digital medium-frequency signal then, and carrying out upconversion process again is radiofrequency signal, launches through antenna.
In one embodiment; The up course of work of the digital direct discharging station of employing digital microwave of the present invention transmission specifically can for: said capped end is through the antenna received RF signal; With its down-converted is analog if signal; Carry out analog-to-digital conversion again; Convert this analog if signal into digital medium-frequency signal (can be digital medium-frequency signal through analog-to-digital conversion directly also), carry out Digital Down Convert processing (this Digital Down Convert is handled and is mainly filtering, extracts and handle) afterwards and be baseband signal downstream signal; Afterwards this baseband signal is carried out framing and handle, the baseband signal after then this framing being handled is modulated to the analog if signal that is fit to far-end Outdoor Device Unit (ODU) transmission, at last this analog if signal is outputed to far-end Outdoor Device Unit (ODU); Far-end Outdoor Device Unit (ODU) is modulated to the microwaves corresponding frequency range with this analog if signal, launches through the remote microwave antenna after the processing and amplifying then.
Near-end Outdoor Device Unit (ODU) receives the microwave signal that the remote microwave antenna is launched through the near-end microwave antenna, and this microwave signal is carried out the conversion of microwave to intermediate frequency, outputs to said relay afterwards; The baseband signal that this signal demodulation process of relay is a framing; Again the baseband signal of this framing is separated frame and be treated to baseband signal; Carry out Digital Up Convert processing (this Digital Up Convert is handled and is mainly filtering, interpolation processing) then and be digital medium-frequency signal; To carry out digital-to-analogue conversion be analog if signal to this digital medium-frequency signal then, and carrying out upconversion process again is radiofrequency signal, is coupled to said base station through antenna for base station.
Wherein, in one embodiment, like Fig. 2, said relay comprises near-end radio frequency unit, near-end Digital IF Processing unit, near-end microwave frame processing unit and near-end IF Modulation/demodulating unit; One end of said near-end radio frequency unit is of coupled connections through antenna for base station and said base station, and the other end of said near-end radio frequency unit is connected with said near-end microwave antenna through near-end Digital IF Processing unit, near-end microwave frame processing unit, near-end IF Modulation/demodulating unit, near-end Outdoor Device Unit (ODU) successively.
Said near-end radio frequency unit is coupled to downstream signal through antenna for base station from said base station; And it is down-converted to analog if signal; Analog-to-digital conversion through said near-end Digital IF Processing unit; And become baseband signal after the Digital Down Converts processing such as extraction and Filtering Processing; Handle through the framing of said near-end microwave frame processing unit, the baseband signal after said near-end IF Modulation/demodulating unit is handled this framing is modulated into analog if signal and outputs to said near-end Outdoor Device Unit (ODU) again.
Said near-end IF Modulation/demodulating unit is demodulated into the analog if signal of this near-end Outdoor Device Unit (ODU) output the baseband signal of corresponding framing; Said near-end microwave frame processing unit is separated the baseband signal of this framing and is reverted to baseband signal after frame is handled; Become analog intermediate frequency signal after handling through filtering, interpolation and the digital-to-analogue conversion of said near-end Digital IF Processing unit again and output to said near-end radio frequency unit, said near-end radio frequency unit converts this analog intermediate frequency signal into radiofrequency signal and is coupled to said base station through antenna for base station.
In one embodiment, like Fig. 3, said capped end comprises remote radio unit (RRU), remote digital IF processing unit, remote microwave frame processing unit and far-end IF Modulation/demodulating unit.
One end of said far-end IF Modulation/demodulating unit is connected with said far-end Outdoor Device Unit, and the other end is connected with remote radio unit (RRU) through said remote microwave frame processing unit, remote digital IF processing unit successively.
Said far-end IF Modulation/demodulating unit is demodulated into the analog if signal of said far-end Outdoor Device Unit output the baseband signal of corresponding framing; Said remote microwave frame processing unit is separated the baseband signal of this framing and is reverted to baseband signal after frame is handled; Become analog intermediate frequency signal after handling through Digital Up Convert such as the filtering of said remote digital IF processing unit, interpolation and digital-to-analogue conversion again and output to said remote radio unit (RRU), said remote radio unit (RRU) converts this analog intermediate frequency signal into radiofrequency signal and launches through antenna.
Said remote radio unit (RRU) is through said antenna received RF signal; It is down-converted to analog intermediate frequency signal; Analog-to-digital conversion through said remote digital IF processing unit; And become baseband signal after the Digital Down Converts processing such as filtering and extraction, and said remote microwave frame processing unit carries out framing to this baseband signal to be handled, and the baseband signal after by said far-end IF Modulation/demodulating unit this framing being handled again is modulated into analog if signal and outputs to said far-end Outdoor Device Unit.
The digital direct discharging station of employing digital microwave transmission of the present invention can be operated in the main frequency range of China Mobile, and it can be GSM, CDMA, CDMA2000, WCDMA and TD-SCDMA etc.Microwave frequency band comprises the microwave communication frequency range that all countries allow.
In sum; The digital direct discharging station of employing digital microwave transmission of the present invention; With the radiofrequency signal digitlization, adopt digital microwave wireless transmission between relay and capped end, the space transmission be modulation after the carrier wave that has digitized radio frequency signal; Therefore Digitized Transmission radiofrequency signal of the present invention is not subject to the influence of weather, and the signal transmission is more stable; Need not lay just ability transmission signals of optical fiber, reduce the networking expense; The microwave resource is the frequency resource that belongs to total in addition, its rich, and the digital direct discharging station of employing digital microwave transmission of the present invention adopts the microwave transmission signal, and it can not take lacking frequency resource of mobile communication; And the digital direct discharging station of employing digital microwave transmission of the present invention comprises relay and capped end, adopts the microwave wireless transmission of digital signals between relay and the capped end, on the transmitting-receiving microwave signal, does not have the requirement of receive-transmit isolation.And the digital direct discharging station of employing digital microwave transmission simultaneously of the present invention adopts the digital microwave transmission, and the system works clock recovers from said far-end IF Modulation/demodulating unit, and its system frequency is more stable for a long time, does not have the system frequency deviation problem.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any modification of within spirit of the present invention and principle, being done, be equal to replacement and improvement etc., all should be included within the claim protection range of the present invention.
Claims (5)
1. a digital direct discharging station that adopts the digital microwave transmission comprises base station, near-end microwave antenna and remote microwave antenna, it is characterized in that, also comprises: relay, near-end Outdoor Device Unit, far-end Outdoor Device Unit and capped end;
Said base station is of coupled connections through an end of antenna for base station and said relay; The other end of said relay is connected with said near-end microwave antenna through said near-end Outdoor Device Unit, and the remote microwave antenna is connected with said capped end through the far-end Outdoor Device Unit;
Said relay obtains the downstream signal of said base station through the antenna for base station coupling; Convert said downstream signal into digital signal; Again this digital signal down variable frequency is arrived baseband signal, convert this baseband signal into analog if signal then and output to said near-end Outdoor Device Unit; Said near-end Outdoor Device Unit is modulated to the microwaves corresponding frequency range with this analog if signal, launches through the near-end microwave antenna after the processing and amplifying then; Said far-end Outdoor Device Unit receives the microwave signal of near-end microwave antenna emission through the remote microwave antenna; This microwave signal is demodulated into analog if signal outputs to said capped end; Said capped end converts this analog if signal into baseband signal; Convert this baseband signal into analog signal again, and then upconvert to radiofrequency signal and launch through antenna;
Said capped end converts this radiofrequency signal into digital signal through the antenna received RF signal, again this digital signal down variable frequency is arrived baseband signal, converts this baseband signal into analog if signal then and outputs to said far-end Outdoor Device Unit; Said far-end Outdoor Device Unit is modulated to the microwaves corresponding frequency range with this analog if signal, launches through the remote microwave antenna then; Said near-end Outdoor Device Unit receives the microwave signal of remote microwave antenna emission through the near-end microwave antenna; This microwave signal is demodulated into analog if signal outputs to said relay; Said relay converts this analog if signal into baseband signal; Convert this baseband signal into analog signal again, then this analog signal is upconverted to upward signal and be coupled to said base station through antenna for base station.
2. the digital direct discharging station of employing digital microwave transmission according to claim 1 is characterized in that:
Said relay comprises near-end radio frequency unit, near-end Digital IF Processing unit, near-end microwave frame processing unit and near-end IF Modulation/demodulating unit;
One end of said near-end radio frequency unit is of coupled connections through antenna for base station and said base station, and the other end is connected with said near-end Outdoor Device Unit through near-end Digital IF Processing unit, near-end microwave frame processing unit, near-end IF Modulation/demodulating unit successively;
Said near-end radio frequency unit is coupled to downstream signal through antenna for base station from said base station; And it is down-converted to analog if signal; Become baseband signal after analog-to-digital conversion, extraction and the Filtering Processing through said near-end Digital IF Processing unit; Handle through the framing of said near-end microwave frame processing unit, the baseband signal after said near-end IF Modulation/demodulating unit is handled this framing is modulated into analog if signal and outputs to said near-end Outdoor Device Unit again;
Said near-end IF Modulation/demodulating unit is demodulated into the analog if signal of this near-end Outdoor Device Unit output the baseband signal of corresponding framing; Said near-end microwave frame processing unit is separated the baseband signal of this framing and is reverted to baseband signal after frame is handled; Become analog intermediate frequency signal after handling through filtering, interpolation and the digital-to-analogue conversion of said near-end Digital IF Processing unit again and output to said near-end radio frequency unit, said near-end radio frequency unit converts this analog intermediate frequency signal into radiofrequency signal and is coupled to said base station through antenna for base station.
3. the digital direct discharging station of employing digital microwave transmission according to claim 1 and 2 is characterized in that:
Said capped end comprises remote radio unit (RRU), remote digital IF processing unit, remote microwave frame processing unit and far-end IF Modulation/demodulating unit;
One end of said far-end IF Modulation/demodulating unit is connected with said far-end Outdoor Device Unit, and the other end is connected with remote radio unit (RRU) through said remote microwave frame processing unit, remote digital IF processing unit successively;
Said far-end IF Modulation/demodulating unit is demodulated into the analog if signal of said far-end Outdoor Device Unit output the baseband signal of corresponding framing; Said remote microwave frame processing unit is separated the baseband signal of this framing and is reverted to baseband signal after frame is handled; Become analog intermediate frequency signal after handling through filtering, interpolation and the digital-to-analogue conversion of said remote digital IF processing unit again and output to said remote radio unit (RRU), said remote radio unit (RRU) converts this analog intermediate frequency signal into radiofrequency signal and launches through antenna;
Said remote radio unit (RRU) is through said antenna received RF signal; It is down-converted to analog intermediate frequency signal; Become baseband signal after analog-to-digital conversion, filtering and the extraction processing through said remote digital IF processing unit; Said remote microwave frame processing unit carries out framing to this baseband signal to be handled, and the baseband signal after by said far-end IF Modulation/demodulating unit this framing being handled again is modulated into analog if signal and outputs to said far-end Outdoor Device Unit.
4. the digital direct discharging station of employing digital microwave transmission according to claim 1 and 2, it is characterized in that: said digital direct discharging station comprises GSM or CDMA or WCDMA or CDMA2000 or TD-SCDMA direct discharging station.
5. the digital direct discharging station of employing digital microwave transmission according to claim 3, it is characterized in that: said digital direct discharging station comprises GSM or CDMA or WCDMA or CDMA2000 or TD-SCDMA direct discharging station.
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| CN2009100373237A CN101494493B (en) | 2009-02-23 | 2009-02-23 | Digital direct discharging station using digital microwave transmission |
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| CN2009100373237A CN101494493B (en) | 2009-02-23 | 2009-02-23 | Digital direct discharging station using digital microwave transmission |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102307064A (en) * | 2011-05-16 | 2012-01-04 | 武汉虹信通信技术有限责任公司 | Frequency-shift-based multi-system analogue fiber broadband access system and transmission method thereof |
| CN102238564B (en) * | 2011-07-04 | 2013-11-06 | 京信通信系统（中国）有限公司 | Digital microwave remote coverage system and method |
| CN103634785B (en) * | 2013-09-13 | 2016-09-28 | 京信通信系统（中国）有限公司 | Radio Network System |
| CN103501202B (en) * | 2013-10-28 | 2016-08-17 | 中国人民解放军91388部队 | Wireless network communications system based on submarine target locating and tracking and method |
| CN111835367B (en) | 2019-04-11 | 2022-04-22 | 华为技术有限公司 | Signal processing chip and communication device |
| CN111010683B (en) * | 2019-11-18 | 2023-03-21 | 广东电网有限责任公司 | Signal coverage transmission method and system for re-shielding environment |
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