CN201733303U - SCDMA outdoor radio frequency amplification device - Google Patents
SCDMA outdoor radio frequency amplification device Download PDFInfo
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- CN201733303U CN201733303U CN2010201983746U CN201020198374U CN201733303U CN 201733303 U CN201733303 U CN 201733303U CN 2010201983746 U CN2010201983746 U CN 2010201983746U CN 201020198374 U CN201020198374 U CN 201020198374U CN 201733303 U CN201733303 U CN 201733303U
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Abstract
The utility model provides an SCDMA (Synchronous Code Division Multiple Access) outdoor radio frequency amplification device which comprises a power amplifier, a low-noise amplifier, a circulator, a radio frequency switch, a synchronous control unit and a power supply unit, wherein the radio frequency switch is connected with the output terminal of the low-noise amplifier, the input terminal of the power amplifier and a receiving/transmitting bench of a base station respectively; the synchronous control unit is used for processing the received uplink/downlink synchronous control signals from the base station and sending corresponding generated uplink/downlink switching signals to the control signal connecting terminal of the radio frequency switch; and the radio frequency switch is controlled by the uplink/downlink switching signals to selectively switch the operating states of an uplink and a downlink. The utility model achieves the uplink/downlink synchronization of the equipment by use of synchronous sources of the base station, is convenient and reliable, reduces cost, and is flexible in application. The SCDMA outdoor radio frequency amplification device can be directly installed when a new station is put into service or additionally installed in an old station, so as to increase the coverage area and improve the receiving sensitivity of the base station.
Description
Technical field
The utility model relates to the outdoor radio frequency unit of a kind of outdoor radio frequency unit, particularly SCDMA.
Background technology
Usually the method for improving coverage effect has increases transmitting power, improve antenna height, restrain noise, select the antenna of high-gain more etc.But the realization of above method all will be subjected to the restriction of certain condition, thereby is difficult to realize improving the purpose of coverage effect.For example: need increase feeder line length when improving antenna height, then the feeder line attenuation also increases thereupon.Suppose that main feeder is lost in about 7dBm, then the transmitting power of 26dBm only is 19dBm after arriving antenna opening.Be that power that the base station power amplifier sends has 80% to be fallen by feeder loss.
Therefore, with its increase transmitter power, the attenuation when reducing transmitter arrival antenna not as trying every possible means is as adopting the mode of the outer radio frequency unit of installation room.The use of outdoor radio frequency unit simultaneously can make the overall noise number of base station receiving system reduce, and makes the system gain balance of the space segment uplink and downlink link of existing mobile communication system as far as possible, thereby the normal threshold signal that receives in base station is reduced.Like this, the mobile phone that is in outside the critical covering position also can enter normal coverage area, and the mobile phone transmitting power that is in the overlay area also can reduce, thereby prolongs the service time after the each charging of battery.
The outdoor radio frequency amplification apparatus of SCDMA belongs to wireless signal and covers the field.It is used with SCDMA base station, broadband at work as a kind of important means that realizes that wireless signal covers, and is installed between base station and the antenna, is used for improving the area coverage and the receiving sensitivity of base station.The application of the outdoor radio frequency amplification apparatus of SCDMA can enlarge the coverage of network rapidly with less investment, than the short time, improves the receiving sensitivity of base station.The outdoor radio frequency amplification apparatus of SCDMA is applied between base station and the antenna, plays an important role in wireless communication networks covers.
SCDMA is the wireless access technology of S-CDMA, it has adopted the advanced technologies such as SWAP+ air interface protocol of smart antenna, software radio and independent development, be a brand-new system, a brand-new China has the third generation wireless communication technology standard of complete independent intellectual property right.
The unique technique advantage of SCDMA is embodied in: SCDMA be in the world first cover with the wireless communication technology standard of smart antenna application in commercial telecommunication operation; For the first time time division duplex (TDD) is used for macro cell structure, its base station and terminal be the wide-scale adoption software radio architecture all; And the above function of optimum organization for the first time, realized the wireless communication protocol of S-CDMA becoming wireless communication technology standard leading in the world.
SCDMA is a new generation of wireless communication technology platform, also be China first have the radio communication core technology of complete independent intellectual property right, this technology also is the intellectual property core part of China 3G (Third Generation) Moblie technical standard TD-SCDMA.
SCDMA is the technology source of TD-SCDMA (3G), on market, promote ripe SCDMA system earlier on a large scale, correctness and reliability when the core key technology that can further verify the TD-SCDMA standard is used in large user group, shorten TD-SCDMA research and development of products and required time of industrialization, facilitate the sizable application early of TD-SCDMA technology; By promoting the SCDMA wireless access system, also can help the experience of the network planning, construction and the operation of the accumulation TDD of operator in advance, become the leading standard establish a firm foundation in 3G market for impelling TD-SCDMA; By promoting the SCDMA wireless access system, China's Communications Market by whole world maximum, after China Telecommunications Trade's reform, building the general telecommunications service in last kilometer wireless access network and rural area is opportunity, wireless and the mobile communication industry of China can be broken away from passive situation under one's control, walk out the new road of a manufacturing industry and the balanced development of operation industry, drive the communication equipment that large quantities of communication manufacturing enterprises produces " China Chip ".
The outdoor radio frequency amplification apparatus of SCDMA is as a kind of important supplementary means that realizes that wireless signal covers, can remedy the deficiency that the base station covers in the wireless network, enlarge the coverage of base station, reduce the influence of base station receiving terminal cable loss, improve the base station receiving sensitivity, reduce the cost of the network coverage simultaneously.In the process of SCDMA technological direction maturation and promotion 3G development, be accompanied by the popularization of SCDMA base station, broadband, the outdoor radio frequency amplification apparatus of SCDMA will play an increasingly important role.
The utility model content
Main purpose of the present utility model is to provide a kind of SCDMA outdoor radio frequency amplification apparatus, to improve the coverage effect of base station.
The outdoor radio frequency amplification apparatus of a kind of SCDMA comprises power subsystem, synchronous control unit, radio-frequency (RF) switch, power amplifier, low noise amplifier and circulator.
Described circulator is connected with described low noise amplifier with described power amplifier, is used to separate the uplink and downlink radiofrequency signal; Described radio-frequency (RF) switch is connected with described power amplifier with described low noise amplifier, described synchronous control unit is used to handle the uplink and downlink synchronous control signal that receives, produce concurrently serve, the downing switch signal is to described radio-frequency (RF) switch, described radio-frequency (RF) switch is optionally switched the uplink and downlink link working state; Described power subsystem is used to handle the base station power supplying control signal that receives, and produces corresponding power supply signal, finishes the power supply of equipment; Also comprise
First filter, first filter is connected between described radio-frequency (RF) switch and the base transceiver station, is used to extract the uplink and downlink radiofrequency signal;
Second filter, second filter is connected between described circulator and the antenna, is used to extract the uplink and downlink radiofrequency signal;
The 3rd filter, the 3rd filter are arranged between base transceiver station and the described synchronous control unit, are used to extract the uplink and downlink synchronizing signal;
The 4th filter, the 4th filter are arranged between base transceiver station and the described power subsystem, are used to extract power supplying control signal.
Further, also comprise a protection switch, this protection switch is connected with described circulator with described low noise amplifier, optionally switches on or off up link by described synchronous control unit control.
Further, also comprise the 5th filter, the 5th filter is arranged on up link and is connected with described low noise amplifier.
Further, also comprise demodulating unit, be connected between the 3rd filter and the synchronous control unit, be used for the uplink and downlink synchronizing signal that receives is carried out demodulation, obtain the uplink and downlink synchronous control signal and deliver to synchronous control unit.
Further, described outdoor radio frequency unit adopts low loss cable to be connected with base transceiver station, is used for transmitting simultaneously uplink and downlink radiofrequency signal, uplink and downlink synchronizing signal, reaches power supplying control signal.
By above-mentioned to description of the present utility model as can be known, compared with prior art, the utlity model has following beneficial effect:
One, the utility model adopts the frequency multiplexing technique of service signal, synchronizing signal, the shared same cable of power supply signal, effectively reduced the external connectivity port of this device, greatly reduce equipment cost and installation difficulty, simplified installation steps, made things convenient for the application of this device;
Two, the utility model utilizes the synchronisation source of base station to realize that the uplink and downlink of equipment self are synchronous, convenient and reliable, has reduced cost simultaneously;
Three, the utility model applying flexible both can directly be installed when new website is opened, and also can install additional in old station, to improve the area coverage and the receiving sensitivity of base station;
Four, utility model can obtain suitable gain, is subjected to interference effect little, and is easy for installation, construction investment is low, and instant effect has high performance price ratio.
Main application scenarios:
Be applicable to the occasion that needs to strengthen base station transmitting power or improve the base station receiving sensitivity.When treating that area of coverage telephone traffic is not high, area is big, or the overlay environment complexity, when space loss is big, can use the outdoor radio frequency amplification apparatus of SCDMA, it is installed between base station BTS port and the antenna, to reach the purpose that improves coverage effect.
Description of drawings
Fig. 1 is the theory diagram of the outdoor radio frequency amplification apparatus of a kind of SCDMA of the present utility model.
Embodiment
Below the utility model will be further described by embodiment.
With reference to Fig. 1, the outdoor radio frequency amplification apparatus of a kind of SCDMA of the present utility model comprises:
Power amplifier PA is used for the downstream signal from the base station information source is carried out power amplification.Power amplifier PA input also the level be associated with a plurality of preamplifiers, be used for carrying out preposition to downstream signal.
Low noise amplifier LNA is used for that the up radiofrequency signal that antenna receives is carried out low noise and amplifies.Low noise amplifier adopts multi-stage cascade, and up radiofrequency signal is amplified step by step, improves the base station receiving sensitivity.In up link, be provided with the 3rd filter 10, be used for the signal that antenna receives being carried out filtering, other interference signal beyond the filtering SCDMA frequency band.
Radio-frequency (RF) switch 14, the first radio frequency link of radio-frequency (RF) switch 14 are connected with the output of final stage low noise amplifier LNA15, the second radio frequency link is connected with down link preamplifier 16 inputs, public connecting end is connected with first filter 17.First filter 17 connects base transceiver station BTS by coaxial feeder, and first filter 17 is used for the signal from the base transceiver station input is carried out filtering, extracts the uplink and downlink radiofrequency signal.The control signal link of radio-frequency (RF) switch 14 is connected with the output of synchronous control unit 18 respectively, is used to receive the uplink and downlink switching signal that synchronous control unit 18 sends.Radio-frequency (RF) switch 14 is optionally switched the uplink and downlink link working state by uplink and downlink switching signal control action.
The operation principle of the outdoor radio frequency amplification apparatus of SCDMA is as follows:
The outdoor radio frequency amplification apparatus of SCDMA is made up of 4 road identical signal processing links, and each bar link carries out bidirectional filtering to one tunnel radiofrequency signal and amplifies, and finishes the amplification of 4 roadbed station signals altogether.The smart antenna of SCDMA requires each base station to have 8 tunnel reception/transmission channels, and therefore, each base station need be equipped with two outdoor radio frequency amplification apparatus of SCDMA in application, it is installed on the smart antenna on base station iron tower top before.
Arbitrary handle link with this device is an example, and its operation principle is described.Operation principle as shown in Figure 1.Signal from antenna is through second filter 12; out-of-band other wireless signal of filtering; enter circulator 11; with the uplink and downlink Signal Separation; upward signal is sent into first order low noise LNA through protection switch 13 outputs and is amplified; amplify through doing the two-stage low noise after 10 filtering of the 3rd filter again, pass through radio-frequency (RF) switch 14, second filter 17 and the coaxial feeder again, the signal after amplifying is delivered to the base station transceiver unit.Outdoor radio frequency amplification apparatus can reduce thermal noise greatly under the prerequisite that does not influence carrier wave/interference ratio, thereby has improved the transmission quality of upward signal.This is because outdoor radio frequency amplification apparatus is arranged on the outdoor cat head in base station, so amplifying signal is without feeder loss, noise factor is low simultaneously, have enough gains again, so be equivalent to improve the signal incoming level that the base station receives, reduce the influence of its noise factor again, helped restituted signal in high quality.
Signal by base transceiver station BTS output is divided into three the tunnel, the first via is a downstream signal, the signal of BTS output is through first filter 17, obtain downstream signal, from radio-frequency (RF) switch 14 outputs, carry out high-power amplification through delivering to power amplifier PA after the preposition amplification, make signal power reach launch requirements, deliver to antenna by circulator 11 again and be transmitted into user terminal; The second the tunnel is the uplink and downlink synchronizing signal after the ASK modulation treatment, the signal of BTS output enters the 4th filter 11, obtain this uplink and downlink synchronizing signal, enter demodulating unit and carry out ASK demodulation acquisition uplink and downlink synchronous control signal, and deliver to synchronous control unit 18, processing and control by synchronous control unit 18, output uplink and downlink switching signal and up guard signal, uplink and downlink switching signal control radio-frequency (RF) switch 14 change actions, up guard signal control protection switch 13 optionally switches on or off up link; Third Road is a power supplying control signal, the signal of BTS output enters the 5th filter 12, obtains power supplying control signal and delivers to power subsystem 19, and power subsystem 19 therefrom extracts DC+24V direct current supply voltage through handling, and be converted into the required direct voltage of each device, finish the power supply of equipment.
Above-mentioned first filter 17, second filter 12 are the band pass filter of bandwidth 1800MHz, and the 3rd filter 10 is a cavity body filter.The 4th filter 11 is a bandwidth 10.7MHz band pass filter, and the 5th filter 12 is a low pass filter.
Above-mentioned only is an embodiment of the present utility model, but design concept of the present utility model is not limited thereto, and allly utilizes this design that the utility model is carried out the change of unsubstantiality, all should belong to the behavior of invading the utility model protection range.
Claims (5)
1. the outdoor radio frequency amplification apparatus of SCDMA comprises power subsystem, synchronous control unit, radio-frequency (RF) switch, power amplifier, low noise amplifier and circulator;
Described circulator is connected with described low noise amplifier with described power amplifier, is used to separate the uplink and downlink radiofrequency signal; Described radio-frequency (RF) switch is connected with described power amplifier with described low noise amplifier, described synchronous control unit is used to handle the uplink and downlink synchronous control signal that receives, produce concurrently serve, the downing switch signal is to described radio-frequency (RF) switch, described radio-frequency (RF) switch is optionally switched the uplink and downlink link working state; Described power subsystem is used to handle the base station power supplying control signal that receives, and produces corresponding power supply signal, finishes the power supply of equipment, it is characterized in that: also comprise
First filter, first filter is connected between described radio-frequency (RF) switch and the base transceiver station, is used to extract the uplink and downlink radiofrequency signal;
Second filter, second filter is connected between described circulator and the antenna, is used to extract the uplink and downlink radiofrequency signal;
The 3rd filter, the 3rd filter are arranged between base transceiver station and the described synchronous control unit, are used to extract the uplink and downlink synchronizing signal;
The 4th filter, the 4th filter are arranged between base transceiver station and the described power subsystem, are used to extract power supplying control signal.
2. the outdoor radio frequency amplification apparatus of a kind of SCDMA as claimed in claim 1; it is characterized in that: also comprise a protection switch; this protection switch is connected with described circulator with described low noise amplifier, optionally switches on or off up link by described synchronous control unit control.
3. the outdoor radio frequency amplification apparatus of a kind of SCDMA as claimed in claim 1 is characterized in that: also comprise the 5th filter, the 5th filter is arranged on up link and is connected with described low noise amplifier.
4. the outdoor radio frequency amplification apparatus of a kind of SCDMA as claimed in claim 1, it is characterized in that: also comprise demodulating unit, be connected between the 3rd filter and the synchronous control unit, be used for the uplink and downlink synchronizing signal that receives is carried out demodulation, obtain the uplink and downlink synchronous control signal and deliver to synchronous control unit.
5. the outdoor radio frequency amplification apparatus of a kind of SCDMA as claimed in claim 1, it is characterized in that: described outdoor radio frequency unit adopts low loss cable to be connected with base transceiver station, is used for transmitting simultaneously uplink and downlink radiofrequency signal, uplink and downlink synchronizing signal, reaches power supplying control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201983746U CN201733303U (en) | 2010-05-17 | 2010-05-17 | SCDMA outdoor radio frequency amplification device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201983746U CN201733303U (en) | 2010-05-17 | 2010-05-17 | SCDMA outdoor radio frequency amplification device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201733303U true CN201733303U (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201983746U Expired - Fee Related CN201733303U (en) | 2010-05-17 | 2010-05-17 | SCDMA outdoor radio frequency amplification device |
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| CN (1) | CN201733303U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647211A (en) * | 2011-02-22 | 2012-08-22 | 中兴通讯股份有限公司 | Mobile terminal for realizing wireless clustering function by utilizing Zigbee technology |
| CN103546189A (en) * | 2013-11-13 | 2014-01-29 | 苏州华士无线科技有限公司 | Radio-frequency front end circuit and system |
| CN114337766A (en) * | 2020-09-30 | 2022-04-12 | 新岸线(北京)科技集团有限公司 | Method and device for realizing indoor wireless signal coverage |
-
2010
- 2010-05-17 CN CN2010201983746U patent/CN201733303U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102647211A (en) * | 2011-02-22 | 2012-08-22 | 中兴通讯股份有限公司 | Mobile terminal for realizing wireless clustering function by utilizing Zigbee technology |
| CN103546189A (en) * | 2013-11-13 | 2014-01-29 | 苏州华士无线科技有限公司 | Radio-frequency front end circuit and system |
| CN103546189B (en) * | 2013-11-13 | 2016-04-13 | 苏州华士无线科技有限公司 | Radio-frequency (RF) front-end circuit and system |
| CN114337766A (en) * | 2020-09-30 | 2022-04-12 | 新岸线(北京)科技集团有限公司 | Method and device for realizing indoor wireless signal coverage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20140517 |