CN201623710U - Digital fiber zooming system with both GSM and WCDMA - Google Patents
Digital fiber zooming system with both GSM and WCDMA Download PDFInfo
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- CN201623710U CN201623710U CN2010201124066U CN201020112406U CN201623710U CN 201623710 U CN201623710 U CN 201623710U CN 2010201124066 U CN2010201124066 U CN 2010201124066U CN 201020112406 U CN201020112406 U CN 201020112406U CN 201623710 U CN201623710 U CN 201623710U
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Abstract
A digital fiber zooming system with both GSM and WCDMA comprises a local machine and a remote machine, wherein the local machine comprises a proximal end duplexer, a proximal end upper frequency conversion module, a proximal end lower frequency conversion module, a proximal end combiner, a proximal end ADC subsystem, a proximal end DAC subsystem and a proximal end optical transceiver module; the remote machine comprises a remote end duplexer, a remote end upper frequency conversion module, a remote end lower frequency conversion module, a remote end combiner, a remote end ADC subsystem, a remote end DAC subsystem, a remote end optical transceiver module, a power amplifier module and a low-noise amplifier module; a proximal end baseband processing unit is connected between the proximal end optical transceiver module, the proximal end ADC subsystem and the proximal end DAC subsystem; and a remote end baseband processing unit is connected between the remote end optical transceiver module, the remote end ADC subsystem and the remote end DAC subsystem. The straight amplification station can realize remote transmission of GSM and WCDMA multi-carrier mobile signals and large dynamic range of signal coverage.
Description
[technical field]
The utility model relates to the field, repeater, the digital optical fiber remote system of particularly a kind of GSM and WCDMA coexistence.
[background technology]
Along with the fast development of China's mobile communication cause, the radio network optimization and the network coverage have shown its importance day by day, and wherein, direct discharging station is the low and characteristics in increase coverage territory rapidly with cost of investment that it was had, are widely used.The wireless signal distance transmission system of repeater generally all adopts the analogue transmission technology at present.Wherein, analog optical fiber transmission system be exactly wherein adopt many a kind of.Because there is the defective of intrinsic noise stack in the analog optical fiber transmission means, cause the dynamic range of long-distance transmissions and subregion transmission to descend, be difficult to solve the long-distance transmissions of multi-carrier signal and the signal covering problem of big capacity, great dynamic range.
The digital optical fiber remote system adopts numeral, optical fiber processing technology, and proximal fiber is signal digitalized, to far-end, utilizes remote radio unit (RRU) that signal is regenerated, amplified by Optical Fiber Transmission, and the transmission means of signal between near, far-end is digital form.The digital optical fiber remote system is the wireless network soverlay technique that a kind of effective realization base station signal zooms out, and mainly is made up of digital near-end machine and digital remote termination two parts.When practical application, digital near-end machine can be one, and that digital remote termination can have is a plurality of, can parallel connection also can connect, and it is flexible that whole network organizing is accomplished.Digital optical fiber direct station can effectively compensate the transmission link loss, and can not make network produce the noise stack, guarantees can not produce harmful effect to the base station; Digital optical fiber direct station enlarges a lot than traditional optical fiber repeater transmission range, its single-hop distance can reach 40 kilometers, and the system transmissions maximum distance can reach more than 140 kilometers, is particularly suitable for using in the environment of long Distance Transmission.
The baseband processing unit of ordinary numbers fiber optic stretch system mainly is that the signal of communication (as GSM standard or WCDMA standard) at a certain standard carries out on the numeral/down-conversion, framing/separate signal processing such as frame.Two kinds of standards then need two complete equipments, and cost is higher.
[utility model content]
Technical problem to be solved in the utility model is to provide the digital optical fiber remote system of a kind of GSM and WCDMA coexistence, utilize a cover hardware device to realize the long-distance transmissions and the covering of the multi-carrier mobile communication signal under GSM and two kinds of standards of WCDMA, for mobile communication system increased a kind of flexibly, the new technique means of great dynamic range and jumbo radiofrequency signal long-distance transmissions and covering, the system applies flexibility is strong, effectively reduces cost.
The utility model solves the problems of the technologies described above by the following technical solutions:
The digital optical fiber remote system of a kind of GSM and WCDMA coexistence comprises near-end machine and remote termination, and the near-end machine is connected by optical fiber with remote termination; Described near-end machine comprises near-end duplexer, near-end up-conversion module, near-end down conversion module, near-end mixer, near-end ADC subsystem, near-end DAC subsystem, near-end optical transceiver module; Described remote termination comprises far-end duplexer, far-end up-conversion module, far-end down conversion module, far-end mixer, far-end ADC subsystem, far-end DAC subsystem, far-end optical transceiver module, power amplifier module, LNA module;
Described near-end up-conversion module comprises GSM link up-conversion module and WCDMA link up-conversion module, described near-end down conversion module comprises GSM link down conversion module and WCDMA link down conversion module, and described near-end DAC subsystem comprises GSM link DAC subsystem and WCDMA link DAC subsystem; Described far-end up-conversion module comprises GSM link up-conversion module and WCDMA link up-conversion module, described far-end down conversion module comprises GSM link down conversion module and WCDMA link down conversion module, and described far-end DAC subsystem comprises GSM link DAC subsystem and WCDMA link DAC subsystem.
Be connected with the near-end baseband processing unit between described near-end optical transceiver module, near-end ADC subsystem, the near-end DAC subsystem; Be connected with the far-end baseband processing unit between described far-end optical transceiver module, far-end ADC subsystem, the far-end DAC subsystem; Described near-end baseband processing unit comprises near-end Base-Band Processing down going channel and near-end Base-Band Processing data feedback channel; Described near-end Base-Band Processing down going channel comprises GSM link down going channel and WCDMA link down going channel, and its input is connected with near-end ADC subsystem output, and its output is connected with the input of near-end optical transceiver module; Described near-end Base-Band Processing data feedback channel comprises GSM link data feedback channel and WCDMA link data feedback channel, and its input is connected with the output of near-end optical transceiver module, and its output is connected with the input of near-end DAC subsystem; Described far-end baseband processing unit comprises far-end Base-Band Processing down going channel and far-end Base-Band Processing data feedback channel; Described far-end Base-Band Processing data feedback channel comprises GSM link data feedback channel and WCDMA link data feedback channel, and its input is connected with far-end ADC subsystem output, and its output is connected with the input of far-end optical transceiver module; Described far-end Base-Band Processing down going channel comprises GSM link down going channel and WCDMA link down going channel, and its input is connected with the output of far-end optical transceiver module, and its output is connected with the input of far-end DAC subsystem.
Described GSM link possesses 8 carrier wave frequency-selecting functions, and described WCDMA link possesses 3 carrier wave frequency-selecting functions.
The utility model possesses following beneficial effect: 1, this system adopts technology such as Digital Signal Processing, Digital Transmission, can effectively remedy the multiple deficiency of analog, transmission existence.Digital Signal Processing, Digital Transmission have bigger dynamic range, have remarkable application advantage in the network optimization.2, this system utilizes a cover hardware device to realize the long-distance transmissions and the covering of the multi-carrier mobile communication signal under GSM and two kinds of standards of WCDMA, for mobile communication system increased a kind of flexibly, the new technique means of great dynamic range and jumbo radiofrequency signal long-distance transmissions and covering, the system applies flexibility is strong, effectively reduces cost.3, this system is the multi-modulation scheme multicarrier frequency-selecting function that realizes on the distinctive digital intermediate frequency platform of digital optical fiber direct station, can it be 12 years with the dilatation of 8 years GSM signals according to the actual requirements, only need update software to get final product during dilatation, effectively solve the dilatation problem of optical fiber repeater, on operability and cost, have greater advantage.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the utility model structural representation.
[embodiment]
See also shown in Figure 1ly, the digital optical fiber remote system of a kind of GSM and WCDMA coexistence comprises near-end machine and remote termination, and the near-end machine is connected by optical fiber with remote termination; Described near-end machine comprises near-end duplexer, near-end up-conversion module, near-end down conversion module, near-end mixer, near-end ADC subsystem, near-end DAC subsystem, near-end optical transceiver module; Described remote termination comprises far-end duplexer, far-end up-conversion module, far-end down conversion module, far-end mixer, far-end ADC subsystem, far-end DAC subsystem, far-end optical transceiver module, power amplifier module, LNA module.
Described near-end up-conversion module comprises GSM link up-conversion module and WCDMA link up-conversion module, described near-end down conversion module comprises GSM link down conversion module and WCDMA link down conversion module, and described near-end DAC subsystem comprises GSM link DAC subsystem and WCDMA link DAC subsystem; Described far-end up-conversion module comprises GSM link up-conversion module and WCDMA link up-conversion module, described far-end down conversion module comprises GSM link down conversion module and WCDMA link down conversion module, and described far-end DAC subsystem comprises GSM link DAC subsystem and WCDMA link DAC subsystem.
Be connected with the near-end baseband processing unit between described near-end optical transceiver module, near-end ADC subsystem, the near-end DAC subsystem; Be connected with the far-end baseband processing unit between described far-end optical transceiver module, far-end ADC subsystem, the far-end DAC subsystem; Described near-end baseband processing unit comprises near-end Base-Band Processing down going channel and near-end Base-Band Processing data feedback channel; Described near-end Base-Band Processing down going channel comprises GSM link down going channel and WCDMA link down going channel, and its input is connected with near-end ADC subsystem output, and its output is connected with the input of near-end optical transceiver module; Described near-end Base-Band Processing data feedback channel comprises GSM link data feedback channel and WCDMA link data feedback channel, and its input is connected with the output of near-end optical transceiver module, and its output is connected with the input of near-end DAC subsystem; Described far-end baseband processing unit comprises far-end Base-Band Processing down going channel and far-end Base-Band Processing data feedback channel; Described far-end Base-Band Processing data feedback channel comprises GSM link data feedback channel and WCDMA link data feedback channel, and its input is connected with far-end ADC subsystem output, and its output is connected with the input of far-end optical transceiver module; Described far-end Base-Band Processing down going channel comprises GSM link down going channel and WCDMA link down going channel, and its input is connected with the output of far-end optical transceiver module, and its output is connected with the input of far-end DAC subsystem.
Described GSM link possesses 8 carrier wave frequency-selecting functions, and described WCDMA link possesses 3 carrier wave frequency-selecting functions.
Baseband processing unit is a core component of realizing the utility model function, and (FPGA:Field Programmable Gate Array) realizes with field programmable gate array.In the utility model, owing to improved the sample frequency of ADC subsystem, expanded the processing bandwidth, baseband processing unit is the signal of parallel processing GSM and two standards of WCDMA simultaneously, by two paths of signals being closed road/along separate routes, can reach the requirement of transmitting two standard signals simultaneously at interface.Because will be to 8 carrier wave GSM signals, 3 carrier wave WCDMA signals carry out frequency-selecting, need carry out Filtering Processing separately to each carrier wave, baseband processing unit has designed multistage FIR filter and has carried out filtering to satisfy simultaneously in the GSM/WCDMA standard with the outer requirement that suppresses and the requirement of system transmissions time delay.
This digital fiber optic stretch optical transceiver module employing CPRI (The Common Public RadioInterface is organized to set up by CPRI) of system interface standard.CPRI has defined the interface relationship between base station data processing and control element (PCE) REC (Radio Equipment Control) and the base station transceiver unit R E (Radio Equipment), and its data frame structure directly is used in the transfer of data of the nearly far end radio frequency signal of the utility model.
The utility model downstream signal workflow is: behind the unwanted signal, downconvert to analog intermediate frequency signal by near-end GSM down conversion module outside the GSM signal process duplexer filtering band that the base station coupling is come; Equally, outside the WCDMA signal process duplexer filtering band that the base station coupling is come, behind the unwanted signal, downconvert to analog intermediate frequency signal by near-end WCDMA down conversion module; Send into near-end AD subsystem after the near-end mixer is combined into one the tunnel with GSM analog intermediate frequency signal and WCDMA analog intermediate frequency signal two-way and be converted into digital medium-frequency signal.The near-end baseband processing unit downconverts to baseband signal again with GSM link and the pairing digital medium-frequency signal of WCDMA link respectively, and carries out filtering extraction, to reach the band that needs degree of inhibition outward.GSM baseband signal after treatment and WCDMA baseband signal are closed behind the road according to the CPRI framing, and the signal after the framing is sent into the near-end optical transceiver module and is converted to digital optical signal, passes to remote termination through optical fiber.The remote termination optical transceiver module is converted into the signal of telecommunication with the light signal that receives, the far-end baseband processing unit is separated frame and is isolated GSM baseband signal and WCDMA baseband signal, up-converts to digital medium-frequency signal and sends into far-end DAC subsystem through the laggard line number word of filtering interpolation respectively.The parallel DAC of the two-way of far-end DAC subsystem is converted to GSM analog if signal and WCDMA analog if signal with GSM digital medium-frequency signal and WCDMA digital medium-frequency signal, respectively by remote termination GSM up-conversion module and WCDMA up-conversion module up-conversion to radiofrequency signal.Radiofrequency signal enters duplexer and obtains comparatively pure signal after carrying out power amplification through power amplifier module, connects antenna-feedback system again and is transmitted in the air.
The workflow of the utility model upward signal is basic with descending identical, be after the GSM in space and WCDMA radiofrequency signal are received by antenna-feedback system, through the filtering of far-end duplexer, the LNA module is amplified, the remote termination down conversion module downconverts to analog if signal, send into remote termination ADC subsystem after the remote termination mixer is combined into one the tunnel with GSM analog if signal and WCDMA analog if signal and be converted to digital medium-frequency signal, the far-end baseband processing unit is converted to digital optical signal by the far-end optical transceiver module and is transmitted through the fiber to the near-end machine after digital medium-frequency signal is carried out Digital Down Convert and CPRI framing.The near-end photoelectric conversion module is converted to digital electric signal with light signal, process near-end baseband processing unit carries out filtering interpolation and Digital Up Convert is a digital medium-frequency signal, after near-end two-way DAC is converted into analog if signal with GSM and WCDMA digital medium-frequency signal, send into respectively on GSM up-conversion module and the WCDMA up-conversion module and fade to radiofrequency signal, through obtaining pure GSM and WCDMA signal after the corresponding duplexer filtering, the base station is sent in coupling.
The utility model has the advantage of: 1, this system adopts the technology such as Digital Signal Processing, Digital Transmission, can effectively remedy the multiple deficiency of analog signal processing, transmission existence. Digital Signal Processing, Digital Transmission have bigger dynamic range, have remarkable application advantage in the network optimization. 2, this system utilizes a cover hardware device to realize long-distance transmissions and the covering of the multi-carrier mobile communication signal under GSM and two kinds of standards of WCDMA, for GSM increased a kind of flexibly, the new technique means of great dynamic range and jumbo radiofrequency signal long-distance transmissions and covering, the system applies flexibility is strong, effectively reduces cost. 3, this system is the multi-standard multicarrier frequency-selecting function that realizes at the distinctive digital intermediate frequency platform of digital optical fiber direct station, can it be 12 years with the dilatation of 8 years GSM signals according to the actual requirements, only need update software to get final product during dilatation, effectively solve the dilatation problem of optical fiber repeater, have greater advantage in operability and cost.
Claims (3)
1. the digital optical fiber remote system of GSM and WCDMA coexistence comprises near-end machine and remote termination, and the near-end machine is connected by optical fiber with remote termination; Described near-end machine comprises near-end duplexer, near-end up-conversion module, near-end down conversion module, near-end mixer, near-end ADC subsystem, near-end DAC subsystem, near-end optical transceiver module; Described remote termination comprises far-end duplexer, far-end up-conversion module, far-end down conversion module, far-end mixer, far-end ADC subsystem, far-end DAC subsystem, far-end optical transceiver module, power amplifier module, LNA module; It is characterized in that: described near-end up-conversion module comprises GSM link up-conversion module and WCDMA link up-conversion module, described near-end down conversion module comprises GSM link down conversion module and WCDMA link down conversion module, and described near-end DAC subsystem comprises GSM link DAC subsystem and WCDMA link DAC subsystem; Described far-end up-conversion module comprises GSM link up-conversion module and WCDMA link up-conversion module, described far-end down conversion module comprises GSM link down conversion module and WCDMA link down conversion module, and described far-end DAC subsystem comprises GSM link DAC subsystem and WCDMA link DAC subsystem.
2. the digital optical fiber remote system of a kind of GSM as claimed in claim 1 and WCDMA coexistence is characterized in that: be connected with the near-end baseband processing unit between described near-end optical transceiver module, near-end ADC subsystem, the near-end DAC subsystem; Be connected with the far-end baseband processing unit between described far-end optical transceiver module, far-end ADC subsystem, the far-end DAC subsystem; Described near-end baseband processing unit comprises near-end Base-Band Processing down going channel and near-end Base-Band Processing data feedback channel; Described near-end Base-Band Processing down going channel comprises GSM link down going channel and WCDMA link down going channel, and its input is connected with near-end ADC subsystem output, and its output is connected with the input of near-end optical transceiver module; Described near-end Base-Band Processing data feedback channel comprises GSM link data feedback channel and WCDMA link data feedback channel, and its input is connected with the output of near-end optical transceiver module, and its output is connected with the input of near-end DAC subsystem; Described far-end baseband processing unit comprises far-end Base-Band Processing down going channel and far-end Base-Band Processing data feedback channel; Described far-end Base-Band Processing data feedback channel comprises GSM link data feedback channel and WCDMA link data feedback channel, and its input is connected with far-end ADC subsystem output, and its output is connected with the input of far-end optical transceiver module; Described far-end Base-Band Processing down going channel comprises GSM link down going channel and WCDMA link down going channel, and its input is connected with the output of far-end optical transceiver module, and its output is connected with the input of far-end DAC subsystem.
3. the digital optical fiber remote system of a kind of GSM as claimed in claim 2 and WCDMA coexistence, it is characterized in that: described GSM link possesses 8 carrier wave frequency-selecting functions, and described WCDMA link possesses 3 carrier wave frequency-selecting functions.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201124066U CN201623710U (en) | 2010-02-10 | 2010-02-10 | Digital fiber zooming system with both GSM and WCDMA |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201124066U CN201623710U (en) | 2010-02-10 | 2010-02-10 | Digital fiber zooming system with both GSM and WCDMA |
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| CN201623710U true CN201623710U (en) | 2010-11-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102523049A (en) * | 2011-12-12 | 2012-06-27 | 武汉虹信通信技术有限责任公司 | Comprehensive broadband home system based on fiber to the home (FTTH) and signal transmission method thereof |
-
2010
- 2010-02-10 CN CN2010201124066U patent/CN201623710U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102523049A (en) * | 2011-12-12 | 2012-06-27 | 武汉虹信通信技术有限责任公司 | Comprehensive broadband home system based on fiber to the home (FTTH) and signal transmission method thereof |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170615 Address after: No. 7 building two Wufeng Street software Avenue Gulou District of Fuzhou city in Fujian province 350000 No. 89 Fuzhou Software Industrial Park Building Patentee after: Fujian three Yuan Da Technology Co., Ltd. Address before: No. 7 building two Wufeng Street software Avenue Gulou District of Fuzhou city in Fujian province 350000 No. 89 Fuzhou Software Industrial Park Patentee before: Fujian Sunnada Communication Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20190210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |