CN1467940A - Wireless frequency selecting repeater - Google Patents
Wireless frequency selecting repeater Download PDFInfo
- Publication number
- CN1467940A CN1467940A CNA021343470A CN02134347A CN1467940A CN 1467940 A CN1467940 A CN 1467940A CN A021343470 A CNA021343470 A CN A021343470A CN 02134347 A CN02134347 A CN 02134347A CN 1467940 A CN1467940 A CN 1467940A
- Authority
- CN
- China
- Prior art keywords
- frequency
- selecting
- module
- selecting module
- amplifier
- 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.)
- Granted
Links
Images
Landscapes
- Mobile Radio Communication Systems (AREA)
- Radio Relay Systems (AREA)
Abstract
The invention relates to a wireless frequency selecting direct broadcasting station comprising a donor antenna, customer antenna, a duplexer, descendent low noise amplifier, descendent power amplifier, a bridge, up low noise amplifier, up power amplifier, power supply module and frequency selecting module, the frequency selecting module includes an up frequency selecting module and a down frequency selecting module which apply carrier wave frequency selecting mode for selecting the frequency, the frequency selecting module comprises band-pass filter, frequency mixer, intermediate frequency amplifier and intermediate frequency filter. The CDMA can be used in the signal coverage for the CDMA 800MHz mobile communication system.
Description
Affiliated technical field
The present invention relates to a kind of Wireless Telecom Equipment that is used for CDMA mobile communication system uplink and downlink signal is carried out two-way frequency-selecting, power amplification, same frequency forwarding.
Background technology
Since this century the eighties, GSM900MHz, DCS1800MHz mobile communication system are in extensive use all over the world, and China user has reached 1.5 hundred million families at present.Along with the develop rapidly of mobile communication technology and the growth of traffic carrying capacity, a kind of new mobile communications network CDMA800MHz mobile radio communication begins to occur, the CDMA800MHz mobile communication system is to be shared the multi-address connecting mode of carrier frequency channel by a plurality of Code Channels, compares CDMA frequency efficiency height with DCS with GSM, required base station number is few, transmitting power is little, and speech quality is good, strong security, coverage effect is good, thereby cdma network has good market prospects.
But, because China's mobile communication is that many nets are laid equal stress on, how tame operator and the system of depositing, how solving crosstalking mutually between the signal becomes technical barrier.As shown in Figure 1 be CDMA, GSM, the shared working frequency range of DCS three big mobile communication system.As can be seen from Figure 1, CDMA800MHz system descending frequency range is 870～880MHz, and GSM900MHz system uplink frequency range is 885～915MHz, has only 5MHz protection frequency band therebetween.Present wireless frequency selecting repeater reckoned without afterwards when design will build the CDMA net, therefore at that time to the inhibition degree requirement with outer unwanted signal, can not effectively defend the interference of CDMA800MHz system unwanted signal.And the selectivity of frequency selection method is relatively poor, can not prevent the interference of CDMA signal to GSM, DCS system effectively.
Therefore newly-built cdma network comprises base station and repeater, must adopt the otherwise effective technique measure, prevents the interference of its unwanted signal to GSM, DCS system.
Summary of the invention
The purpose of this invention is to provide a kind of CDMA signal of can effectively eliminating is the wireless frequency selecting repeater that disturbs to GSM900MHz system and the DCS1800MHz that builds up operation.
Technical scheme of the present invention is achieved in that wireless frequency selecting repeater, comprise donor antenna, user antenna, duplexer, descending low noise amplifier, downlink power amplifier, electric bridge, up low noise amplifier, ascending power amplifier, power module and frequency-selecting module, described frequency-selecting module comprises up frequency-selecting module and down frequency selection module, and described up frequency-selecting module and down frequency selection module adopt the frequency-selecting of carrier wave frequency selection method.Described frequency-selecting module is by band pass filter, frequency mixer, and intermediate frequency amplifier and intermediate-frequency filter are formed.
As to further improvement of the present invention, the bandwidth of operation of described band pass filter is 870～880MHz, and the centre frequency of intermediate-frequency filter is 114.99MHz, and width is 1.23MHz.
Include mixing, filter circuit in down frequency selection module in the frequency-selecting module and the up frequency-selecting module.Frequency mixer carries out frequency translation according to required frequency, and filter is selected useful signal, suppresses unwanted signal, adopts the filter serial arrangement, and band is outer to be suppressed more than the Du Keda 60dB.
As to further improvement of the present invention, described frequency-selecting module can be connected in series by two-stage or multistage identical carrier wave frequency selection circuit.Adopt multistage carrier wave frequency selection circuit, can more effectively suppress unwanted signal, reach the inhibition degree higher unwanted signal.
The signal that the present invention is used for the CDMA800MHz mobile communication system covers, and can not produce any harmful interference to GSM900MHz, the DCS1800MHz system that builds up operation before.
Description of drawings
Fig. 1 CDMA800MHz, GSMMHz, DCS1800MHz mobile communication system working frequency range
Fig. 2 principle of the invention block diagram is wherein: 01 cdma base station, 02 donor antenna, 03 duplexer, 04 descending low-noise amplifier 05 down frequency selection module 06 downlink power amplifier 07 3dB electric bridge 08 duplexer 09 user antenna 10 travelling carriages 11 up low-noise amplifier 12 up frequency-selecting power amplifier module 13 ascending power amplifiers 14 AC/DC are by source module
Fig. 3: down frequency selection module of the present invention (05) functional-block diagram
Wherein: 15,20 band pass filters, 16 frequency mixers, 17,19 intermediate frequency amplifiers, 18 intermediate-frequency filters
Embodiment
As shown in Figure 2, the functional-block diagram of wireless frequency selecting repeater, its basic functional principle is:
(870～880MHz) enter downstream branch through duplexer (03) high pass to base station (01) downstream signal that is received from the space by donor antenna (02), at first pass through descending low noise amplifier (04) amplification and shunt, carry out carrier wave frequency-selecting and downlink power amplifier (06) power amplification by down frequency selection module (05) again, close road and duplexer (08) high pass through 3dB electric bridge (07) two carrier frequency, be emitted to travelling carriage (10) by user antenna (09) at last.In like manner, the upward signal (825～835MHz) of travelling carriage (10) emission, receive from the space by user antenna (09), after duplexer (08) low pass, amplify, along separate routes by up low noise amplifier (11), again by up frequency-selecting module (12) carry out carrier wave frequency-selecting and ascending power amplifier (13) power amplification, two carrier waves close the road, through duplexer (03) low pass, send back base station (01) through the space by donor antenna (02) at last.
First order carrier circuit is by band pass filter (15,20), frequency mixer (16), and intermediate frequency amplifier (17,19) and intermediate-frequency filter (18) are formed.The bandwidth of operation of band pass filter (15,20) is 870～880MHz, just in time allows the downlink working frequency band to pass through, and stops the outer unwanted signal of band to pass through.Frequency mixer (16) is transformed to intermediate frequency earlier according to the required carrier channel of choosing, and restores into the primary carrier channel frequency after intermediate-frequency filter (18) is chosen.The centre frequency of intermediate-frequency filter is 114.99MHz, and width is 1.23MHz, just in time chooses a carrier channel.The effect of intermediate frequency amplifier (17,19) is the power loss that compensating band bandpass filter (15,20) and intermediate-frequency filter (18) are brought.
The carrier to second order frequency selection circuit and the first order are identical, no longer are repeated in this description.
Evidence adopts the wireless frequency selecting repeater of present embodiment can not cause harmful interference to GSM900MHz system and the DCS1800MHz system that has built up operation before, is with outer spurious emissions level must satisfy the limit value requirement of state administration authorities regulation.
The technical scheme that present embodiment adopts simultaneously also has: donor antenna (02) adopt minor beam (30～60 °), high-gain (＞18dBi), high before and after than (＞25dB) directed plate antenna; Downlink power amplifier (06) adopts the feedforward intermodulation to offset mode, realizes high power, low distortion.Adopt output level automatic control technology (ALC) simultaneously, prevent that the power output overrate from causing the serious distortion of signal.
Claims (4)
1. wireless frequency selecting repeater, comprise: donor antenna (02), user antenna (09), duplexer (03,08), descending low noise amplifier (04), downlink power amplifier (06), electric bridge (07), up low noise amplifier (11), ascending power amplifier (13), power module (14) and frequency-selecting module, it is characterized in that: described frequency-selecting module comprises up frequency-selecting module (12) and down frequency selection module (05), and described up frequency-selecting module (12) and down frequency selection module (05) adopt the frequency-selecting of carrier wave frequency selection method.
2. wireless frequency selecting repeater according to claim 1, it is characterized in that, described frequency-selecting module is by band pass filter (15,20), frequency mixer (16), intermediate frequency amplifier (17,19) and intermediate-frequency filter (18) are formed, the bandwidth of operation of band pass filter (15,20) is 870～880MHz, and the centre frequency of intermediate-frequency filter is 114.99MHz, and width is 1.23MHz.
3, wireless frequency selecting repeater according to claim 1 is characterized in that: described frequency-selecting module is connected in series by two-stage or multistage identical carrier wave frequency selection circuit.
4, wireless frequency selecting repeater according to claim 1 is characterized in that, described donor antenna (02) is directed plate antenna, adopts 30～60 ° of wave beams, gains greater than 18dBi, front and back ratio greater than 25dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021343470A CN100391135C (en) | 2002-07-12 | 2002-07-12 | Wireless frequency selecting repeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021343470A CN100391135C (en) | 2002-07-12 | 2002-07-12 | Wireless frequency selecting repeater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1467940A true CN1467940A (en) | 2004-01-14 |
| CN100391135C CN100391135C (en) | 2008-05-28 |
Family
ID=34145754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021343470A Expired - Fee Related CN100391135C (en) | 2002-07-12 | 2002-07-12 | Wireless frequency selecting repeater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100391135C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459749C (en) * | 2005-03-16 | 2009-02-04 | 深圳国人通信有限公司 | Broadband adjustable directly playing station |
| CN101277480B (en) * | 2007-03-29 | 2012-08-29 | 京信通信***（中国）有限公司 | Direct amplifier station eliminating self-excitation interference |
| CN101521539B (en) * | 2008-02-25 | 2012-12-19 | 京信通信***（中国）有限公司 | Wideband digital frequency-selecting wireless repeater system and wideband signal digital frequency-selecting method thereof |
| CN102932029A (en) * | 2012-09-20 | 2013-02-13 | 中国联合网络通信集团有限公司 | Long term evolution (LTE) indoor distribution system and double-path frequency conversion equipment and method thereof |
| CN115426227A (en) * | 2022-08-05 | 2022-12-02 | 四川天邑康和通信股份有限公司 | Method and system for setting carrier frequency of repeater and repeater |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1127223C (en) * | 1999-07-29 | 2003-11-05 | 厦门华侨电子企业有限公司 | Direct amplifying station for mobile communication at 350 MH2 band and its antenna installation method |
| CN2543309Y (en) * | 2002-05-17 | 2003-04-02 | 上海欣民通信设备有限公司 | Mobile communication high-frequency-amplification receiver |
| CN2553571Y (en) * | 2002-07-12 | 2003-05-28 | 京信通信***（广州）有限公司 | Radio frequency-selecting direct amplification station |
-
2002
- 2002-07-12 CN CNB021343470A patent/CN100391135C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459749C (en) * | 2005-03-16 | 2009-02-04 | 深圳国人通信有限公司 | Broadband adjustable directly playing station |
| CN101277480B (en) * | 2007-03-29 | 2012-08-29 | 京信通信***（中国）有限公司 | Direct amplifier station eliminating self-excitation interference |
| CN101521539B (en) * | 2008-02-25 | 2012-12-19 | 京信通信***（中国）有限公司 | Wideband digital frequency-selecting wireless repeater system and wideband signal digital frequency-selecting method thereof |
| CN102932029A (en) * | 2012-09-20 | 2013-02-13 | 中国联合网络通信集团有限公司 | Long term evolution (LTE) indoor distribution system and double-path frequency conversion equipment and method thereof |
| CN115426227A (en) * | 2022-08-05 | 2022-12-02 | 四川天邑康和通信股份有限公司 | Method and system for setting carrier frequency of repeater and repeater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100391135C (en) | 2008-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU693209B2 (en) | Repeater | |
| CN109274381B (en) | Multi-frequency band mobile communication radio frequency transceiver | |
| CN1507703A (en) | Multi-band cellular service over CATV network | |
| CN1327637A (en) | A device and method for reducing the amplitude of signal | |
| CN110677187B (en) | High-throughput communication satellite transponder of distributed gateway station and gateway station | |
| KR100711015B1 (en) | Wireless system combining arrangement and method thereof | |
| CN100391135C (en) | Wireless frequency selecting repeater | |
| CN211655006U (en) | A multifrequency combiner for 5G | |
| CN1290285C (en) | Communication blocking device and communication blocking method | |
| CN2553571Y (en) | Radio frequency-selecting direct amplification station | |
| CN1238864A (en) | Homodyne cellular base station | |
| EP1325556B1 (en) | High frequency amplification circuit | |
| CN102201799A (en) | Multi-carrier/multiband frequency-selecting implementation method and circuit | |
| CN201054589Y (en) | A radio frequency-selective repeater | |
| CN101404532A (en) | POI multisystem cable combination equipment of repeater | |
| CN201122970Y (en) | Double-frequency micro-power repeater | |
| CN202231868U (en) | Multi-system digital enclave compressing and dispreading system | |
| CN1832358A (en) | Multiple-in-one network transmission method of mobile communication indoor distribution system | |
| CN2819659Y (en) | Direct WCDMA broadcast station of mobile telecommunication | |
| CN101060360A (en) | A mobile communication broad band repeater | |
| US6496683B1 (en) | Apparatus and method for suppressing frequency interference | |
| CN1473407A (en) | Low noise transmitter architecture using foldover selective band filtering and method thereof | |
| CN2807620Y (en) | Repeater in mobile communications system | |
| CN2624561Y (en) | Base station power amplifier | |
| CN2788493Y (en) | 3G mobile communication shift frequency repeater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20080528 Termination date: 20150712 |
|
| EXPY | Termination of patent right or utility model |