CN201726398U - Digital radio remote system - Google Patents
Digital radio remote system Download PDFInfo
- Publication number
- CN201726398U CN201726398U CN2010201877662U CN201020187766U CN201726398U CN 201726398 U CN201726398 U CN 201726398U CN 2010201877662 U CN2010201877662 U CN 2010201877662U CN 201020187766 U CN201020187766 U CN 201020187766U CN 201726398 U CN201726398 U CN 201726398U
- Authority
- CN
- China
- Prior art keywords
- unit
- digital
- cpri
- data
- convert
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Optical Communication System (AREA)
Abstract
The utility model discloses a digital radio remote system. On the basis of the conventional digital radio remote system, a near-end digital access control unit also comprises a first data compression unit and a first data decompression unit, and a far-end digital radio remote unit also comprises a second data compression unit and a second data decompression unit; the first data compression unit is connected between a first digital down-conversion unit and a first CPRI packaging unit, and the first data decompression unit is connected between a first CPRI frame-decoding unit and a first digital up-conversion unit; the second data compression unit is connected between a second digital down-conversion unit and a second CPRI packaging unit, and the second data decompression unit is connected between a second CPRI frame-decoding unit and a second digital up-conversion unit. The utility model can reduce the hardware cost of a serial-parallel conversion unit and a photoelectric conversion unit, thus reducing the cost of the digital radio remote system.
Description
Technical field
The utility model relates to the mobile communication technology field, relates in particular to a kind of digital RF far-drawing system.
Background technology
In mobile communication product, digital RF far-drawing system is made up of near-end numeral access control unit and remote digital Remote Radio Unit, it is a kind of direct coupling base station signal, adopt the signal covering system of digital intermediate frequency transmission means, this digital RF far-drawing system adopts a near-end numeral access control unit to zoom out to be connected with the remote digital Remote Radio Unit by link and finishes the signal covering, as Fig. 1, in the prior art, near-end numeral access control unit comprises duplexer, power amplifier unit, the LNA unit, the first radio frequency unit RF1, the second radio frequency unit RF2, the first D/A conversion unit DA1, the first AD conversion unit AD1, the first Digital Down Convert cells D DC1, the first Digital Up Convert cells D UC1, the one CPRI packaged unit, the one CPRI separates frame unit, first string and the converting unit and first photoelectric conversion unit, the remote digital Remote Radio Unit comprises the 3rd radio frequency unit R F3, the 4th radio frequency unit RF4, the second D/A conversion unit DA2, the second AD conversion unit AD2, the second Digital Down Convert cells D DC2, the second Digital Up Convert cells D UC2, the 2nd CPRI packaged unit, the 2nd CPRI separates frame unit, second string and the converting unit and second photoelectric conversion unit;
The receiving terminal of duplexer or transmitting terminal are connected with antenna, and output is connected by LNA unit, second radio frequency unit, first AD conversion unit, the first Digital Down Convert unit, a CPRI packaged unit and first end of first string and converting unit successively; First string and second end of converting unit are connected with first photoelectric conversion unit, and first string also the 3rd end of converting unit is connected by the input that a CPRI separates frame unit, the first Digital Up Convert unit, first D/A conversion unit, first radio frequency unit, power amplifier unit and duplexer successively;
First photoelectric conversion unit is connected by optical fiber with second photoelectric conversion unit, second photoelectric conversion unit and second string and first end of converting unit is connected, and second string also second end of converting unit is connected by the end that the 2nd CPRI separates frame unit, the second Digital Up Convert unit, second D/A conversion unit, the 4th radio frequency unit and base station successively; The other end of base station is connected with the 3rd end of second string and converting unit by the 3rd radio frequency unit, second AD conversion unit, the second Digital Down Convert unit, the 2nd CPRI packaged unit successively;
For upward signal, the radiofrequency signal that antenna receives is through duplexer, the LNA unit, second radio frequency unit down-converts to analog intermediate frequency signal, be digital signal through the first AD conversion unit analog-to-digital conversion again, this digital signal is a baseband signal through the digital filtering and the extraction treatment conversion of the first Digital Down Convert unit, (this first string and converting unit also need this serial data is encoded to be converted to serial data through also going here and there of first string and converting unit again after this baseband signal is handled through the CPRI protocol packing of a CPRI packaged unit, realize the data sync of data sending terminal and data receiver like this), this serial data through first photoelectric conversion unit by electrical signal conversion to light signal, light signal is transmitted into second photoelectric conversion unit by optical fiber; Second photoelectric conversion unit receives this light signal and is converted to the signal of telecommunication, again through being converted to parallel data after second string and the string of converting unit and the conversion, this parallel data is a digital signal through the upconversion process of separating frame processing, Digital Up Convert unit that the 2nd CPRI separates frame unit, this digital signal is an analog signal through the digital-to-analogue conversion of second D/A conversion unit, this analog signal through the 4th radio frequency unit up-convert to radiofrequency signal after send to the base station;
For downstream signal, the 3rd radio frequency unit receives the radiofrequency signal that the base station sends, down-convert to analog intermediate frequency signal, digital filtering and extraction through the second AD conversion unit analog-to-digital conversion and the second Digital Down Convert unit is treated to baseband signal again, output to second string and the converting unit after handling through the CPRI protocol packing of the 2nd CPRI packaged unit then, second string and converting unit output to second photoelectric conversion unit after also string is converted to serial data with this baseband signal, second photoelectric conversion unit is converted to behind the light signal by Optical Fiber Transmission this serial data to first photoelectric conversion unit, this first photoelectric conversion unit receives this light signal and is converted to the signal of telecommunication, through first string and the string of converting unit and be converted to parallel data, the frame of separating of separating frame unit through a CPRI is handled again, the upconversion process of the first Digital Up Convert unit is a digital signal, this digital signal is an analog signal through the digital-to-analogue conversion of first D/A conversion unit, upconversion process through first radio frequency unit is a radiofrequency signal, this radiofrequency signal outputs to duplexer after handling through the power amplification of power amplifier unit, launches through antenna again.
At present, adopt the medium of optical fiber as transmission between near-end numeral access control unit and the remote digital Remote Radio Unit, the transmission rate of optical fiber is the highest, and the error rate is low, and long transmission distance can satisfy the demand of system for transmission link.Wherein, the optical fiber of near-end numeral access control unit and remote digital Remote Radio Unit drives link and is made up of string and converting unit and photoelectric conversion unit two parts respectively,, the increase of carrier number more and more wideer and the application of multi-modulation scheme digital optical fiber direct station along with the radiofrequency signal bandwidth, transmission rate request to string and converting unit and photoelectric conversion unit is also more and more higher, therefore the hardware cost of string and converting unit and photoelectric conversion unit is also more and more higher, has also just improved the cost of digital RF far-drawing system.
Summary of the invention
The utility model provides a kind of digital RF far-drawing system, and it can reduce the hardware cost of string and converting unit and photoelectric conversion unit.
The technical solution of the utility model is: a kind of digital RF far-drawing system, comprise near-end numeral access control unit and remote digital Remote Radio Unit, described near-end numeral access control unit comprises that the first Digital Down Convert unit, a CPRI packaged unit, the first Digital Up Convert unit and a CPRI separate frame unit; Described remote digital Remote Radio Unit comprises that the second Digital Down Convert unit, the 2nd CPRI packaged unit, the second Digital Up Convert unit and the 2nd CPRI separate frame unit;
Described near-end numeral access control unit also comprises first data compression unit and the first data decompression unit, and described remote digital radio frequency stretch system also comprises second data compression unit and the second data decompression unit;
Described first data compression unit is connected between the input of the output of the described first Digital Down Convert unit and a described CPRI packaged unit, and the described first data decompression unit is connected a described CPRI and separates between the input of the output of frame unit and the described first Digital Up Convert unit;
Described second data compression unit is connected between the input of the output of the described second Digital Down Convert unit and described the 2nd CPRI packaged unit, and the described second data decompression unit is connected described the 2nd CPRI and separates between the input of the output of frame unit and the described second Digital Up Convert unit.
The utility model is by adding data compression unit and data decompression unit in the digital RF far-drawing system in the prior art, can reduce the message transmission rate of data in string and converting unit, photoelectric conversion unit, reduced requirement to string and converting unit and photoelectric conversion unit message transmission rate, and then can reduce the grade of string and converting unit and photoelectric conversion unit, also just reduce accordingly the hardware cost of string and converting unit and photoelectric conversion unit, saved the cost of the utility model digital RF far-drawing system.
Description of drawings
Fig. 1 is the structured flowchart of digital RF far-drawing system in the prior art;
Fig. 2 is the structured flowchart of the utility model digital RF far-drawing system.
Embodiment
Below in conjunction with accompanying drawing specific embodiment of the utility model is done a detailed elaboration.
The utility model digital RF far-drawing system is to add first data compression unit, the first data decompression unit, second data compression unit and the second data decompression unit on the basis of existing digital RF far-drawing system, as shown in Figure 2, first data compression unit is connected between the input of the output of the described first Digital Down Convert unit and a described CPRI packaged unit, and the described first data decompression unit is connected a described CPRI and separates between the input of the output of frame unit and the described first Digital Up Convert unit;
Described second data compression unit is connected between the input of the output of the described second Digital Down Convert unit and described the 2nd CPRI packaged unit, and the described second data decompression unit is connected described the 2nd CPRI and separates between the input of the output of frame unit and the described second Digital Up Convert unit.
Described first data compression unit outputs to a CPRI packaged unit after the data of first Digital Down Convert unit output are compressed processing; The described first data decompression unit carries out outputing to the first Digital Up Convert unit after the decompression to the data that a described CPRI separates frame unit output;
Described second data compression unit outputs to the 2nd CPRI packaged unit after the data of second Digital Down Convert unit output are compressed processing; The described second data decompression unit carries out outputing to the second Digital Up Convert unit after the decompression to the data that described the 2nd CPRI separates frame unit output.
Wherein first data compression unit, second data compression unit and the first data decompression unit and the second data decompression unit can adopt compression and decompression algorithm commonly used in the prior art to realize.
By on the basis of the digital RF far-drawing system of prior art, adding data compression unit and data decompression unit, can effectively reduce the message transmission rate of data in string and converting unit and photoelectric conversion unit, reduced requirement to string and converting unit and photoelectric conversion unit message transmission rate, and then can reduce the grade of string and converting unit and photoelectric conversion unit, also just reduce accordingly the hardware cost of string and converting unit and photoelectric conversion unit, saved the cost of the utility model digital RF far-drawing system.
For example, AD conversion unit in the digital RF far-drawing system of prior art adopts the 61.44MHz clock sampling, then string and converting unit and photoelectric conversion unit need adopt the 2.5Gbps grade, and after adding data compression unit and data decompression unit, the message transmission rate of data in string and converting unit and photoelectric conversion unit can be reduced by 50%, then string and converting unit and photoelectric conversion unit only need adopt the 1.25Gbps grade, can reduce the hardware cost of string and converting unit and photoelectric conversion unit like this.
Need to prove that digital RF far-drawing system of the present utility model can be applied in the digital RF far-drawing system of multiple standards such as GSM, CDMA, TD-SCDMA, WCDMA or CDMA2000.
In addition, also the function that the first Digital Down Convert unit, a CPRI packaged unit, the first Digital Up Convert unit, a CPRI of described near-end numeral access control unit can be separated frame unit and first data compression unit and the first data decompression unit adopts fpga chip to realize, as the empty frame FPGA1 among Fig. 2; The function that the second Digital Down Convert unit, the 2nd CPRI packaged unit, the second Digital Up Convert unit, the 2nd CPRI of described remote digital Remote Radio Unit can be separated frame unit and second data compression unit and the second data decompression unit adopts fpga chip to realize, as the empty frame FPGA2 among Fig. 2.
Pass through foregoing description, can find that this data compression technique is applied in the speed that not only can obviously cut down transmission signals on the digital RF far-drawing system, and this technology is simple and practical, particularly in the two-forty in future, the signal occasion of big bandwidth, data compression will become indispensable in a data transmission procedure link, makes some high performance systems realize becoming possibility.
Above-described the utility model execution mode does not constitute the qualification to the utility model protection range.Any modification of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the claim protection range of the present utility model.
Claims (2)
1. digital RF far-drawing system, comprise near-end numeral access control unit and remote digital Remote Radio Unit, described near-end numeral access control unit comprises that the first Digital Down Convert unit, a CPRI packaged unit, the first Digital Up Convert unit and a CPRI separate frame unit; Described remote digital Remote Radio Unit comprises that the second Digital Down Convert unit, the 2nd CPRI packaged unit, the second Digital Up Convert unit and the 2nd CPRI separate frame unit;
It is characterized in that: described near-end numeral access control unit also comprises first data compression unit and the first data decompression unit, and described remote digital Remote Radio Unit also comprises second data compression unit and the second data decompression unit;
Described first data compression unit is connected between the input of the output of the described first Digital Down Convert unit and a described CPR I packaged unit, and the described first data decompression unit is connected a described CPRI and separates between the input of the output of frame unit and the described first Digital Up Convert unit;
Described second data compression unit is connected between the input of the output of the described second Digital Down Convert unit and described the 2nd CPRI packaged unit, and the described second data decompression unit is connected described the 2nd CPRI and separates between the input of the output of frame unit and the described second Digital Up Convert unit.
2. digital RF far-drawing system according to claim 1 is characterized in that, described digital RF far-drawing system comprises the digital RF far-drawing system of GSM, CDMA, TD-SCDMA, WCDMA or CDMA2000 standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201877662U CN201726398U (en) | 2010-04-30 | 2010-04-30 | Digital radio remote system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201877662U CN201726398U (en) | 2010-04-30 | 2010-04-30 | Digital radio remote system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201726398U true CN201726398U (en) | 2011-01-26 |
Family
ID=43494751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201877662U Expired - Fee Related CN201726398U (en) | 2010-04-30 | 2010-04-30 | Digital radio remote system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201726398U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325343A (en) * | 2011-05-25 | 2012-01-18 | 京信通信系统（中国）有限公司 | Data compression and transmission method and data compression and transmission system |
| CN102833000A (en) * | 2012-08-14 | 2012-12-19 | 电信科学技术研究院 | Method and equipment for data transmission |
| CN102957482A (en) * | 2011-08-31 | 2013-03-06 | 深圳光启高等理工研究院 | Method and system for converting communication signal of photo-communication receiving terminal |
| CN103067970A (en) * | 2013-01-14 | 2013-04-24 | 武汉虹信通信技术有限责任公司 | Microwave transmission system based on compression algorithm and microwave transmission method |
-
2010
- 2010-04-30 CN CN2010201877662U patent/CN201726398U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102325343A (en) * | 2011-05-25 | 2012-01-18 | 京信通信系统（中国）有限公司 | Data compression and transmission method and data compression and transmission system |
| CN102325343B (en) * | 2011-05-25 | 2014-03-12 | 京信通信系统（中国）有限公司 | Data compression and transmission method and data compression and transmission system |
| CN102957482A (en) * | 2011-08-31 | 2013-03-06 | 深圳光启高等理工研究院 | Method and system for converting communication signal of photo-communication receiving terminal |
| CN102957482B (en) * | 2011-08-31 | 2016-05-11 | 深圳光启智能光子技术有限公司 | A kind of conversion method and system of optic communication receiving terminal signal of communication |
| CN102833000A (en) * | 2012-08-14 | 2012-12-19 | 电信科学技术研究院 | Method and equipment for data transmission |
| CN102833000B (en) * | 2012-08-14 | 2015-06-17 | 电信科学技术研究院 | Method and equipment for data transmission |
| CN103067970A (en) * | 2013-01-14 | 2013-04-24 | 武汉虹信通信技术有限责任公司 | Microwave transmission system based on compression algorithm and microwave transmission method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103828259B (en) | Distributing antenna system framework | |
| CN1214550C (en) | Signal transmission apparatus and method for optical base station | |
| CN102457458B (en) | The implementation method of a kind of base station digital pre-distortion and device | |
| CN101453799B (en) | Multi-carrier digital frequency-selection radio frequency pulling system and signal processing method thereof | |
| US10727896B2 (en) | Tower top device and passive intermodulation cancellation method | |
| CN1719756B (en) | Method for implementing mobile communication digital optical fibre repeater system | |
| CN102291725B (en) | Multimode digital radio frequency remote system | |
| KR102144964B1 (en) | Digital mapping data transmission method | |
| CN101521893B (en) | Wideband digital frequency selecting and radiating pulling system and signal processing method thereof | |
| CN201726398U (en) | Digital radio remote system | |
| CN101488795A (en) | Optical fiber digital transmission method applied on straight-forward station | |
| CN206041994U (en) | Miniature repeater of multifrequency digit | |
| CN101494493A (en) | Digital direct discharging station using digital microwave transmission | |
| CN102307064A (en) | Frequency-shift-based multi-system analogue fiber broadband access system and transmission method thereof | |
| CN101262270A (en) | A method and device for realizing digital remote communication in the base station system | |
| WO2020140715A1 (en) | Relay network element device, far-end network element device and optical fiber distributed system | |
| CN105656558B (en) | Realize the optical fiber distribution system and method for multiple communication standard accesses | |
| CN1551658B (en) | Mobile communication terminal supporting three pattern communication mode | |
| CN106550371A (en) | A kind of multiple source cut-in method and system | |
| CN104917533A (en) | Method, device and system for IQ data compression | |
| CN201898627U (en) | Digital broadband radio remote unit based on data compression | |
| CN104283826A (en) | Digital compensation method, device and duplexer | |
| CN201623710U (en) | Digital fiber zooming system with both GSM and WCDMA | |
| KR100360012B1 (en) | Apparatus for transmitting a volume of digital optical signals | |
| CN201118871Y (en) | A GSM digital optical cable optical terminal with multi-carrier frequency selection function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110126 Termination date: 20150430 |
|
| EXPY | Termination of patent right or utility model |