CN100574125C - Wireless transceiver system - Google Patents
Wireless transceiver system Download PDFInfo
- Publication number
- CN100574125C CN100574125C CNB2006100600699A CN200610060069A CN100574125C CN 100574125 C CN100574125 C CN 100574125C CN B2006100600699 A CNB2006100600699 A CN B2006100600699A CN 200610060069 A CN200610060069 A CN 200610060069A CN 100574125 C CN100574125 C CN 100574125C
- Authority
- CN
- China
- Prior art keywords
- signal
- transmission loss
- transceiver
- wireless transceiver
- 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.)
- Expired - Fee Related
Links
Images
Abstract
A kind of wireless transceiver system is used for compensate for propagation loss, and it comprises antenna, transceiver, tower amplifier and transmission loss detector.Transceiver is used for transmitting first signal with delivering power.Tower amplifier is connected in transceiver by cable, is used for receiving secondary signal from transceiver, and secondary signal is amplified, and secondary signal is the signal of first signal after via cable attenuation.Transmission loss detector is connected between tower amplifier and the transceiver, is used to detect transceiver and whether transmits signal, also is used to calculate the transmission loss between transceiver and the tower amplifier.Tower amplifier is used for transmitting signal to antenna or from antenna receiving signal according to the testing result of transmission loss detector, also is used to compensate above-mentioned transmission loss.But the transmission loss between described wireless transceiver system fine compensation transceiver and the tower amplifier.
Description
[technical field]
The present invention relates to communication system, relate in particular to a kind of wireless transceiver system.
[background technology]
Consult Fig. 1, be the schematic diagram of conventional wireless receive-transmit system.Traditional wireless transceiver system comprises transceiver 10, tower amplifier (Tower Mounted Amplifier, TMA) 20 and antenna 30.It is outdoor that antenna 30 and tower amplifier 20 are positioned at, and tower amplifier 20 is connected in antenna 30, and transceiver 10 is positioned at indoor.Indoor transceiver 10 is connected in outdoor tower amplifier 20 by cable (Cable).So, between transceiver 10 and tower amplifier 20, there is transmission loss, it comprises cable loss (Cable Loss) and connects loss (Connector Loss).
Because the transmission loss between transceiver 10 and the tower amplifier 20 can not accurately be measured before the wireless transceiver system installation, so tower amplifier 20 can not the fine compensation transmission loss, may cause the power output of tower amplifier 20 to exceed legal power, also may cause tower amplifier 20 can not work in the range of linearity, thereby reduce the usefulness of wireless transceiver system.
[summary of the invention]
In view of this, need provide a kind of wireless transceiver system, it can be used for the transmission loss in the fine compensation wireless transceiver system, improves the usefulness of wireless transceiver system.
A kind of wireless transceiver system is used for compensate for propagation loss, and it comprises antenna, transceiver, tower amplifier and transmission loss detector.Transceiver is used for transmitting first signal with delivering power.Tower amplifier is connected in transceiver by cable, is used for receiving secondary signal from transceiver, and secondary signal is amplified, and secondary signal is the signal of first signal after via cable attenuation.Transmission loss detector is connected between tower amplifier and the transceiver, is used to detect transceiver and whether transmits signal, also is used to calculate the transmission loss between transceiver and the tower amplifier.Transmission loss detector comprises first radio frequency power detector and microcontroller.First radio frequency power detector is used to detect transceiver and whether transmits signal, also is used to detect secondary signal intensity.Microcontroller is used for according to the delivering power calculating transceiver of secondary signal intensity and transceiver and the transmission loss between the tower amplifier, and produces first control signal according to transmission loss.Tower amplifier is used for transmitting signal to antenna or from antenna receiving signal according to the testing result of first radio frequency power detector, also is used for according to the transmission loss between first control signal compensation transceiver and the tower amplifier.
Above-mentioned wireless transceiver system can pass through the transmission loss of tower amplifier fine compensation again by the transmission loss between transmission loss detector accurate Calculation transceiver and the tower amplifier, thereby improves the usefulness of wireless transceiver system.
[description of drawings]
Fig. 1 is the schematic diagram of conventional wireless receive-transmit system.
Fig. 2 is the module map of wireless transceiver system one execution mode of the present invention.
Fig. 3 is the module map of another execution mode of wireless transceiver system of the present invention.
[embodiment]
Consult Fig. 2, be the module map of wireless transceiver system of the present invention (Wireless Transceiving System) execution mode.In the present embodiment, wireless transceiver system is time division duplex (TimeDivision Duplex) pattern.But wireless transceiver system fine compensation transmission loss, it comprise transceiver (Transceiver) 100, tower amplifier (Tower Mounted Amplifier, TMA) 200, antenna (Antenna) 300 and transmission loss detector (Transport Loss Detector) 400.It is outdoor that antenna 300 and tower amplifier 200 are positioned at, and tower amplifier 200 is connected in antenna 300, and transceiver 100 is positioned at indoor.Indoor transceiver 100 is connected in outdoor tower amplifier 200 by cable (Cable), so, between transceiver 100 and tower amplifier 200, there is transmission loss.In the present embodiment, transmission loss comprises cable line loss (Cable Loss) and connects loss (Connector Loss).In other embodiments, transmission loss may also comprise other loss.
First radio-frequency (RF) switch 220 is subjected to radio-frequency (RF) switch control circuit 250 control connection transceivers 100 and transmits amplification module 210, the signal that is about to come from transceiver 100 sends to and transmits amplification module 210, or connect reception amplification module 230 and transceiver 100, be about to come from the signal that receives amplification module 230 and send transceiver 100 to.
Second radio-frequency (RF) switch 240 is subjected to radio-frequency (RF) switch control circuit 250 control connections to transmit amplification module 210 and lightning arrester 260, be about to come from the signal that transmits amplification module 210 and send antenna 300 to via lightning arrester 260, or connect lightning arrester 260 and receive amplification module 230, the signal that is about to come from antenna 300 sends to via lightning arrester 260 and receives amplification module 230.Lightning arrester 260 is connected between the antenna 300 and second radio-frequency (RF) switch 240, is used to protect tower amplifier 200, to avoid thunderbolt.
In other embodiments, transmit amplification module 210 and can omit included amplifier as required, also can comprise other filter, other variable gain amplifier and other fixed gain amplifier as required.
Receive amplification module 230 and be connected between first radio-frequency (RF) switch 220 and second radio-frequency (RF) switch 240, be used for the signal that comes from antenna 300 is amplified, and send institute's amplifying signal to transceiver 100 via cable.In the present embodiment, receive amplification module 230 and comprise filter (Filter) 231, low noise amplifier (Low Noise Amplifier) 232, variable gain amplifier 233 and fixed gain amplifier 234.
In other embodiments, receive amplification module 230 and can omit included amplifier or filter as required, also can comprise other filter, other variable gain amplifier and other fixed gain amplifier as required.
In the present embodiment, wireless transceiver system more comprises coupler (Coupler) 500, is coupled between first radio-frequency (RF) switch 220 and the transceiver 100, and is connected in transmission loss detector 400, is used for secondary signal is coupled to transmission loss detector 400.Coupler 500 also can be included in the finished product of tower amplifier 200.In the present embodiment, coupler 500 can be directional coupler (Directional Coupler).In other embodiments, coupler 500 also can be other coupler.
Radio frequency power detector 410 is connected in coupler 500, is used to detect transceiver 100 and whether transmits signal, and send testing result to radio-frequency (RF) switch control circuit 250.Radio-frequency (RF) switch control circuit 250 is controlled first radio-frequency (RF) switch 220 and second radio-frequency (RF) switch 240 according to the testing result of radio frequency power detector 410.In the present embodiment, when radio frequency power detector 410 detects secondary signal, then detect transceiver 100 and transmit signal, radio-frequency (RF) switch control circuit 250 controls first radio-frequency (RF) switch 220 connects transceiver 100 and transmits amplification module 210, and control second radio-frequency (RF) switch 240 connects transmission amplification module 210 and lightning arrester 260.When radio frequency power detector 410 does not detect secondary signal, then detect transceiver 100 and do not transmit signal, radio-frequency (RF) switch control circuit 250 controls second radio-frequency (RF) switch 240 connects lightning arrester 260 and receives amplification module 210, and control first radio-frequency (RF) switch 220 connects reception amplification module 230 and transceiver 100.
Radio frequency power detector 410 also is used to detect secondary signal intensity, and secondary signal intensity is characterized by first analog signal.In the present embodiment, first analog signal is a voltage signal.In other embodiments, first analog signal also can be current signal.
Analog/digital converter 420 is connected in radio frequency power detector 410, and being used for first analog signal conversion is first digital signal.
Microcontroller 430 can be learnt secondary signal intensity according to first digital signal, and it is used for according to the delivering power calculating transceiver 100 of secondary signal intensity and transceiver 100 and the transmission loss between the tower amplifier 200.In the present embodiment, microcontroller 430 is connected in analog/digital converter 420, is used for according to the delivering power calculating transceiver 100 of first digital signal and transceiver 100 and the transmission loss between the tower amplifier 200.
In the present embodiment, the delivering power of transceiver 100 is known, and microcontroller 430 as the model of transceiver 100, can be learnt the delivering power of transceiver 100 according to the attribute of transceiver 100.
In other embodiments, if delivering power the unknown of transceiver 100, then before wireless transceiver system was installed, transmission loss detector 400 can be connected in transceiver 100 by the cable of known transmission loss.Transceiver 100 transmits the 4th signal to transmission loss detector 400 with its delivering power.Transmission loss detector 400 receives the 5th signal from transceiver 100, and the 5th signal is the signal of the 4th signal after via cable attenuation, so the delivering power of transceiver 100 is that the known transmission of the 5th signal strength signal intensity and cable is lost sum.Microcontroller 430 can record the 5th signal strength signal intensity by radio frequency power detector 410 and analog/digital converter 420, calculates the 5th signal strength signal intensity and known transmission loss sum again, promptly calculates the delivering power of transceiver 100.Thereby microcontroller 430 can be learnt the delivering power of transceiver 100.
In the present embodiment, microcontroller 430 is according to first digital signal secondary signal intensity as can be known, again because the difference of the delivering power of transceiver 100 and secondary signal intensity is the transmission loss between transceiver 100 and the tower amplifier 200.Thereby microcontroller 430 can calculate the transmission loss between transceiver 100 and the tower amplifier 200 according to the delivering power of first digital signal and transceiver 100.Microcontroller 430 also stores first question blank 431 and second question blank 432.
First question blank 431 comprises the control signal of variable gain amplifier 211 and the contrast relationship between the gain.Microcontroller 430 also is used for producing first digital controlled signal according to the transmission loss between first question blank 431 and transceiver 100 and the tower amplifier 200.For example, if the control signal of variable gain amplifier 211 with contrast relationship between the gain is: the linear corresponding gain 0-10dB of control voltage (being control signal) 0-10V, if the transmission loss between transceiver 100 and the amplifier 200 is 6dB, in order to make the transmission loss of variable gain amplifier 211 compensation 6dB, then first digital controlled signal should be the 6V voltage signal.
Second question blank 432 comprises the control signal of variable gain amplifier 233 and the contrast relationship between the gain.Microcontroller 430 also is used for producing second digital controlled signal according to the transmission loss between second question blank 432 and transceiver 100 and the tower amplifier 200.In order to make the variable gain amplifier 233 can be when tower amplifier 200 received signals, to the transmission loss to transceiver 100 of the signal precompensation tower amplifier 200 that received, microcontroller 430 need provide second digital controlled signal always.
Digital/analog converter 440 is used for first digital controlled signal is converted to first analog control signal.In the present embodiment, first analog control signal is a voltage signal.In other embodiments, first analog control signal also can be current signal.
Digital/analog converter 450 is used for second digital controlled signal is converted to second analog control signal.In the present embodiment, second analog control signal is a voltage signal.In other embodiments, second analog control signal also can be current signal.
Consult Fig. 3, be the module map of another execution mode of wireless transceiver system of the present invention.Wireless transceiver system in the present embodiment is similar to the wireless transceiver system among Fig. 2.Only, the tower amplifier 200 ' in the present embodiment more comprises radio frequency power detector 600, and transmission loss detector 400 ' more comprises switch 460.Other module of present embodiment is identical with the execution mode of Fig. 2, therefore omits explanation.
In the present embodiment, wireless transceiver system also can be by the power output of transmission loss detector 400 ' monitoring tower amplifier 200 '.At the initial erection stage of wireless transceiver system, transmission loss detector 400 ' is used to calculate the transmission loss between transceiver 100 and the tower amplifier 200 ', then can be used to monitor the power output of tower amplifier 200 ' At All Other Times.Transmission loss may very situation be (for example owing to some, typhoon) or the time change too for a long time, so, when very the back takes place or needs detection regularly in the dress situation, transmission loss detector 400 ' is used to calculate the transmission loss between transceiver 100 and the tower amplifier 200 ' once more, after calculating is finished, then continue on for monitoring the power output of tower amplifier 200 '.
Switch 460 is connected between analog/digital converter 420, radio frequency power detector 410 and the radio frequency power detector 600, it is subjected to microcontroller 430 controls, be used to connect radio frequency power detector 410 and analog/digital converter 420, or connect radio frequency power detector 600 and analog/digital converter 420.When switch 460 connected radio frequency power detector 410 with analog/digital converter 420, transmission loss detector 400 ' was used to calculate the transmission loss between transceiver 100 and the tower amplifier 200 '.When switch 460 connected radio frequency power detector 600 with analog/digital converter 420, transmission loss detector 400 ' was used to monitor the power output of tower amplifier 200 '.So microcontroller 430 can make transmission loss detector 400 ' be used to calculate transmission loss between transceiver 100 and the tower amplifier 200 ' as required, or be used to monitor the power output of tower amplifier 200 '.
In the present embodiment, secondary signal becomes the 3rd signal via transmitting after amplification module 210 amplifies.The 3rd signal strength signal intensity equals the power output of tower amplifier 200 '.
Radio frequency power detector 600 is connected in and transmits between the amplification module 210 and second radio-frequency (RF) switch 240, is used to detect the 3rd signal strength signal intensity, and the 3rd signal strength signal intensity is characterized by second analog signal.In the present embodiment, second analog signal is a voltage signal.In other embodiments, second analog signal also can be current signal.
It is second digital signal that analog/digital converter 420 also is used for second analog signal conversion.Microcontroller 430 can be learnt the power output of tower amplifier 200 ' according to second digital signal.
Microcontroller 430 also is used for the power output according to legal power and second digital signal monitoring tower amplifier 200 ', i.e. monitoring transmits the power output of amplification module 210.The power output that legal power can not surpass for agreement or the tower amplifier 200 ' of standard code, for example tower amplifier 200 ' of regulation such as the 802.11a/b/g power output that can not surpass.In the present embodiment, microcontroller 430 is according to second digital signal power output of tower amplifier 200 ' as can be known.Then, the power output of microcontroller 430 more legal power and tower amplifier 200 '.If the power output of tower amplifier 200 ' surpasses legal power, then microcontroller 430 produces the 3rd digital controlled signal according to legal power, second digital signal and first question blank 431, so that tower amplifier 200 ' is adjusted its gain.For example, if the power output of tower amplifier surpasses legal power 2dB,, need make the gain of variable gain amplifier 211 reduce 2dB then for the power output that makes tower amplifier 200 is no more than legal power.If this moment, the gain of variable gain amplifier 211 was 6dB, then for the gain that makes variable gain amplifier 211 reduces 2dB, the gain that need make variable gain amplifier 211 is 4dB.If the control signal of variable gain amplifier 211 with contrast relationship between the gain is: the corresponding gain 0-10dB of control voltage (being control signal) 0-10V linearity, then three digital signal should be the 4V voltage signal.
Digital/analog converter 440 also is used for the 3rd digital controlled signal is converted to the 3rd analog control signal.In the present embodiment, the 3rd analog control signal is a voltage signal.In other embodiments, the 3rd analog control signal also can be current signal.
Tower amplifier 200 ' also is used for adjusting its gain according to the 3rd analog control signal, so that the power output of tower amplifier 200 ' is no more than legal power.In above-mentioned giving an example, variable gain amplifier 211 reduces its gain according to the 3rd analog control signal.Thereby, make the power output of tower amplifier 200 ' not exceed legal power, and then reach the purpose of the power output of monitoring tower amplifier 200 '.
The wireless transceiver system of embodiment of the present invention can be by the transmission loss between transmission loss detector 400 ' accurate Calculation transceiver 100 and the tower amplifier 200 ', pass through tower amplifier 200 ' fine compensation transmission loss again, thereby improve the usefulness of wireless transceiver system.
In addition, the wireless transceiver system of embodiment of the present invention also can be monitored the power output of tower amplifier 200 ' by transmission loss detector 400 ', thereby further improves the usefulness of wireless transceiver system.
Claims (22)
1. a wireless transceiver system is used for compensate for propagation loss, and described wireless transceiver system comprises:
Antenna is used for receiving and transmitting signal;
Transceiver is used for transmitting first signal with delivering power; And
Tower amplifier is connected in described transceiver by cable, is used for receiving secondary signal from described transceiver, and described secondary signal is amplified, and described secondary signal is the signal of described first signal after via described cable attenuation;
It is characterized in that described wireless transceiver system more comprises transmission loss detector, be connected between described tower amplifier and the described transceiver, be used to detect described transceiver and whether transmit signal, also be used to calculate the transmission loss between described transceiver and the described tower amplifier, described transmission loss detector comprises:
First radio frequency power detector is used to detect described transceiver and whether transmits signal, also is used to detect described secondary signal intensity; And
Microcontroller is used for delivering power according to described secondary signal intensity and described transceiver and calculates transmission loss between described transceiver and the described tower amplifier, and produces first control signal according to described transmission loss;
Wherein, described tower amplifier is used for transmitting signal to described antenna or from described antenna receiving signal according to the testing result of described first radio frequency power detector, also is used for compensating transmission loss between described transceiver and the described tower amplifier according to described first control signal.
2. wireless transceiver system as claimed in claim 1 is characterized in that described first radio frequency power detector also is used for described secondary signal intensity is characterized by first analog signal; Described transmission loss detector more comprises analog/digital converter, and being used for described first analog signal conversion is first digital signal; Described microcontroller also is used for delivering power according to described first digital signal and described transceiver and calculates transmission loss between described transceiver and the described tower amplifier.
3. wireless transceiver system as claimed in claim 1, it is characterized in that more comprising coupler, be coupled between described tower amplifier and the described transceiver, and be connected in described first radio frequency power detector, be used for described secondary signal is coupled to described first radio frequency power detector.
4. wireless transceiver system as claimed in claim 1 is characterized in that described tower amplifier comprises the transmission amplification module, be used for described secondary signal is amplified, and the secondary signal after will amplifying is launched via described antenna.
5. wireless transceiver system as claimed in claim 4 is characterized in that described transmission amplification module comprises first variable gain amplifier, is used for described secondary signal is amplified.
6. wireless transceiver system as claimed in claim 5, it is characterized in that described microcontroller also stores first question blank, it comprises the control signal of described first variable gain amplifier and the contrast relationship between the gain, and described microcontroller produces described first control signal according to the transmission loss between described first question blank and described transceiver and the described tower amplifier.
7. wireless transceiver system as claimed in claim 6 is characterized in that described first control signal is first digital controlled signal; Described transmission loss detector more comprises digital/analog converter, is used for described first digital controlled signal is converted to first analog control signal; Described first variable gain amplifier also is used for compensating the transmission loss of described transceiver to described tower amplifier according to described first analog control signal.
8. wireless transceiver system as claimed in claim 4 is characterized in that described tower amplifier more comprises the reception amplification module, is used for the signal that comes from described antenna is amplified, and institute's amplifying signal is sent to described transceiver via described cable.
9. wireless transceiver system as claimed in claim 8 is characterized in that described reception amplification module comprises second variable gain amplifier, is used for the signal that comes from described antenna is amplified.
10. wireless transceiver system as claimed in claim 9, it is characterized in that described microcontroller also stores second question blank, it comprises the control signal of described second variable gain amplifier and the contrast relationship between the gain, and described microcontroller produces second digital controlled signal according to the transmission loss between described second question blank and described transceiver and the described tower amplifier.
11. wireless transceiver system as claimed in claim 10 is characterized in that described transmission loss detector more comprises digital/analog converter, is used for described second digital controlled signal is converted to second analog control signal; Described second variable gain amplifier also is used for according to the transmission loss of the described tower amplifier of the described second analog control signal precompensation to described transceiver.
12. wireless transceiver system as claimed in claim 8, it is characterized in that described tower amplifier more comprises the radio-frequency (RF) switch control circuit, be connected in described first radio frequency power detector, be used for controlling described tower amplifier and transmit signal to described antenna or from described antenna receiving signal according to the testing result of described first radio frequency power detector.
13. wireless transceiver system as claimed in claim 12, it is characterized in that described tower amplifier more comprises first radio-frequency (RF) switch, be subjected to described described transceiver of radio-frequency (RF) switch control circuit control connection and described transmission amplification module, or connect described reception amplification module and described transceiver.
14. wireless transceiver system as claimed in claim 13, it is characterized in that more comprising coupler, be coupled between described first radio-frequency (RF) switch and the described transceiver, and be connected in described first radio frequency power detector, be used for described secondary signal is coupled to described first radio frequency power detector.
15. wireless transceiver system as claimed in claim 13, it is characterized in that described tower amplifier more comprises second radio-frequency (RF) switch, be subjected to described transmission amplification module of described radio-frequency (RF) switch control circuit control connection and described antenna, or connect described antenna and described reception amplification module.
16. wireless transceiver system as claimed in claim 1, it is characterized in that described tower amplifier more comprises second radio frequency power detector, be used to detect the 3rd signal strength signal intensity, and described the 3rd signal strength signal intensity is characterized by second analog signal, described the 3rd signal is the signal after described secondary signal is amplified via described tower amplifier.
17. wireless transceiver system as claimed in claim 16, it is characterized in that described transmission loss detector more comprises switch and analog/digital converter, described switch is subjected to described microprocessor controls, be used to connect described first radio frequency power detector and described analog/digital converter, or connect described second radio frequency power detector and described analog/digital converter.
18. wireless transceiver system as claimed in claim 17 is characterized in that described analog/digital converter, being used for described second analog signal conversion is second digital signal; Described microcontroller also is used for monitoring according to legal power and described second digital signal power output of described tower amplifier.
19. wireless transceiver system as claimed in claim 18 is characterized in that described tower amplifier more comprises first variable gain amplifier, is used for described secondary signal is amplified.
20. wireless transceiver system as claimed in claim 19, it is characterized in that described microcontroller also stores first question blank, described first question blank comprises the control signal of described first variable gain amplifier and the contrast relationship between the gain, and described microcontroller produces the 3rd digital controlled signal according to described legal power, described second digital signal and described first question blank.
21. wireless transceiver system as claimed in claim 20 is characterized in that described transmission loss detector more comprises digital/analog converter, is used for described the 3rd digital controlled signal is converted to the 3rd analog control signal; Described first variable gain amplifier also is used for adjusting its gain according to described the 3rd analog control signal.
22. wireless transceiver system as claimed in claim 1 is characterized in that described wireless transceiver system is a TDD mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100600699A CN100574125C (en) | 2006-03-24 | 2006-03-24 | Wireless transceiver system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100600699A CN100574125C (en) | 2006-03-24 | 2006-03-24 | Wireless transceiver system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101043225A CN101043225A (en) | 2007-09-26 |
| CN100574125C true CN100574125C (en) | 2009-12-23 |
Family
ID=38808488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100600699A Expired - Fee Related CN100574125C (en) | 2006-03-24 | 2006-03-24 | Wireless transceiver system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100574125C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101795385B (en) * | 2009-02-03 | 2012-04-18 | 厦门Abb振威电器设备有限公司 | Automatic preamplification and precompensation twisted-pair video transmission method and system |
| CN102946269A (en) * | 2012-11-15 | 2013-02-27 | 哈尔滨海能达科技有限公司 | Method and system for controlling gain of tower top amplifier, tower top amplifier and base station |
| CN103166671A (en) * | 2013-03-29 | 2013-06-19 | 上海华兴数字科技有限公司 | Wireless transceiving circuit |
| EP2879300A1 (en) * | 2013-11-28 | 2015-06-03 | AKG Acoustics GmbH | Antenna system of a radio microphone |
| CN107645309B (en) * | 2016-07-21 | 2019-10-18 | 原睿科技股份有限公司 | Wireless transceivers devices and method |
| CN110098840B (en) * | 2019-04-30 | 2021-01-08 | 维沃移动通信有限公司 | Radio frequency device and terminal equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002290263A (en) * | 2001-03-26 | 2002-10-04 | Hitachi Kokusai Electric Inc | Wireless communication unit |
| CN1571551A (en) * | 2004-05-13 | 2005-01-26 | 中兴通讯股份有限公司 | A base station equipment structure and backup method |
| CN1684531A (en) * | 2004-04-13 | 2005-10-19 | 徐平 | GSM/CDMA two-way duplex tower top amplifier |
-
2006
- 2006-03-24 CN CNB2006100600699A patent/CN100574125C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002290263A (en) * | 2001-03-26 | 2002-10-04 | Hitachi Kokusai Electric Inc | Wireless communication unit |
| CN1684531A (en) * | 2004-04-13 | 2005-10-19 | 徐平 | GSM/CDMA two-way duplex tower top amplifier |
| CN1571551A (en) * | 2004-05-13 | 2005-01-26 | 中兴通讯股份有限公司 | A base station equipment structure and backup method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101043225A (en) | 2007-09-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100517995C (en) | Wireless receiving and transmission system | |
| US7664468B2 (en) | Wireless transceiver system | |
| EP2983298B1 (en) | Compensator module for a transceiver unit, radio system and operating method thereof | |
| CN100574125C (en) | Wireless transceiver system | |
| CN102281113B (en) | Communication relay device and standing-wave ratio detection device and method thereof | |
| US9602148B2 (en) | Compensation for a signal damping while transmitting transmission signals of a wireless mobile device | |
| CN202197283U (en) | Communication relay device and standing-wave ratio detecting device of the communication relay device | |
| JPH06197037A (en) | Amplifier control system and amplifier control method | |
| CN109375176B (en) | Transmitter power amplifier module | |
| CN101227212A (en) | System and method for gain compensation in single antenna TD-SCDMA system | |
| US20070270174A1 (en) | Antenna matching measurement and amplification control | |
| CN102820902A (en) | Signal switching apparatus | |
| US8045925B2 (en) | Wireless communication system and intermediate frequency signal loss compensation circuit thereof | |
| US20030148747A1 (en) | Radio base station | |
| CN203057121U (en) | AGC circuit quick control system based on linear receiver | |
| CN210469240U (en) | High-stability forward automatic gain control circuit | |
| US20210351799A1 (en) | Antenna unit, transmission system and method for operating an antenna unit | |
| CN101742631B (en) | Repeater for solving covering of moving body and control method thereof | |
| CN201682496U (en) | Wireless communication network intelligent amplifier | |
| CN101227211B (en) | Method and apparatus for calibration of power of receiving main broadband | |
| CN215420793U (en) | Transmitter power control loop | |
| CN215268252U (en) | Signal amplification circuit of wireless communication equipment | |
| CN210867714U (en) | Light path insertion loss self-adaptive radio frequency optical receiver | |
| CN220754823U (en) | Ground transmitter, ground terminal and very high frequency data exchange system | |
| CN215734272U (en) | 5G repeater with network manager |
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: 20091223 Termination date: 20150324 |
|
| EXPY | Termination of patent right or utility model |