CN103812581A - Isolation detecting method applicable to high-gain and high-power repeater - Google Patents
Isolation detecting method applicable to high-gain and high-power repeater Download PDFInfo
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- CN103812581A CN103812581A CN201210453875.8A CN201210453875A CN103812581A CN 103812581 A CN103812581 A CN 103812581A CN 201210453875 A CN201210453875 A CN 201210453875A CN 103812581 A CN103812581 A CN 103812581A
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Abstract
The invention relates to an isolation detecting method applicable to a high-gain and high-power repeater. The method comprises arranging isolation detecting modules for detecting the gain and the power of links on both an up link and a down link, wherein every isolation detecting module comprises a numerical control attenuator; adjusting the numerical control attenuator matching with the link gain and the output power which are detected by the isolation detecting modules to determine whether the equipment is in a self-excitation state and meanwhile computing the isolation. Compared with the prior art, the isolation detecting method applicable to the high-gain and high-power repeater selects the up link with the relatively low power for detection, thereby reducing damage, and meanwhile avoiding the interference of an AGC (automatic gain control) circuit and human factors to achieve a high detecting precision.
Description
Technical field
The present invention relates to a kind of method for detecting isolation between, especially relate to a kind of method for detecting isolation between that is applicable to high-gain and high-power repeater.
Background technology
Isolation be the input port signal of repeater to the degree of decay between delivery outlet, be the ratio of power, unit is: dB.It depends on the position of donor antenna and retransmitting antenna, also with the azimuth of antenna, and the relating to parameters such as front and back ratio.In real site is installed, donor antenna to BTS port and MS port to the isolation between retransmitting antenna as shown in Figure 1, measure by employing signal source, spectrum analyzer, power amplifier by the mensuration of its isolation.In the time testing in this way, because signal source and spectrum analyzer belong to high-precision instrument, be not easy to use in the wild, simultaneously because equipment is to work in high-gain and high-power situation, so more than the requirement of isolation can reach 100dB, this is just because signal source transmitting power deficiency or not high the causing of spectrum analyzer resolution cannot be measured, so can amplify with power amplifier, will have like this power supply unit etc., can be to bother very much so the method should use.Another kind method is to be based upon theoretical calculating aspect, but actual environment can be because of the variation of weather, and the reflection of Adjacent Buildings and absorption affect the isolation of dual-mode antenna, thus can and actual Zhi Xiang missionary society larger.
Summary of the invention
Object of the present invention is exactly to provide a kind of method for detecting isolation between that is applicable to high-gain and high-power repeater in order to overcome the defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
A kind of method for detecting isolation between that is applicable to high-gain and high-power repeater, the applicable repeater of the method comprises up link and down link, up link and down link include duplexer, power amplifier, intermediate-frequency filter, local oscillation signal generator, MCU module and low noise amplifier, described MCU module is carried out automatic gain control to up link and down link, described up link connects isolation and detects module, this isolation detects gain and the power of module for detection of up link, and be provided with numerical-control attenuator, described detection method comprises the following steps:
1) close the power amplifier of down link, the numerical-control attenuator that up link is set is 31dB;
2) threshold value of the automatic gain control of up link is set, by a relieving of starting to control for low noise amplifier, power amplifier;
3) numerical-control attenuator of progressively adjusting up link is by 31dB to 0dB;
4) be in course of adjustment and detect power output and the link gain of module detection up link by isolation, if detect when output power value reaches maximum, isolation detection module is judged in self-excitation state, the pad value of isolation=link gain-numerical-control attenuator; If output power value is unchanged, perform step 5);
5) decontrol the analog attenuation value of up link numerical-control attenuator, and to be progressively adjusted to this analog attenuation value by the preset value of this analog attenuation value be 0dB;
6) be in course of adjustment and detect power output and the link gain of module detection up link by isolation, if detect when output power value reaches maximum, isolation detection module is judged in self-excitation state, the analog attenuation value that isolation=link gain+numerical-control attenuator is open.
Step 3) and step 5) in adjust step value be 1dB.
Step 5) in the preset value of analog attenuation value be 15dB.
Compared with prior art, the present invention adopts up link to detect, because its merit power is less compared to down link, not fragile under self-excitation state, therefore can improve the reliability of detection, in addition owing to being provided with the thresholding of automatic gain control, by a relieving of starting to control for low noise amplifier, power amplifier, make the isolation value and the actual isolation value that measure more approaching, effectively raise the precision of detection.
Accompanying drawing explanation
Fig. 1 is the connection diagram of repeater and donor antenna, retransmitting antenna;
Fig. 2 is the detection architecture schematic diagram of repeater;
Fig. 3 is flow chart of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
A kind of method for detecting isolation between that is applicable to high-gain and high-power repeater, the applicable repeater of the method comprises up link A and down link B, up link A and down link B include duplexer 1, power amplifier 2, intermediate-frequency filter 3, local oscillation signal generator 4, MCU module 5 and low noise amplifier 6, MCU module 5 is carried out automatic gain control to up link A and down link B, up link A connects isolation and detects module 7, this isolation detects gain and the power of module 7 for detection of up link A, and be provided with numerical-control attenuator, described detection method comprises the following steps:
1) close the power amplifier of down link, the numerical-control attenuator that up link is set is 31dB;
2) threshold value of the automatic gain control of up link is set, by a relieving of starting to control for low noise amplifier, power amplifier;
3) numerical-control attenuator of progressively adjusting up link is by 31dB to 0dB;
4) be in course of adjustment and detect power output and the link gain of module detection up link by isolation, if detect when output power value reaches maximum, isolation detection module is judged in self-excitation state, the pad value of isolation=link gain-numerical-control attenuator; If output power value is unchanged, perform step 5);
5) decontrol the analog attenuation value of up link numerical-control attenuator, and to be progressively adjusted to this analog attenuation value by the preset value of this analog attenuation value be 0dB, wherein the preset value of analog attenuation value is generally 15dB.
6) be in course of adjustment and detect power output and the link gain of module detection up link by isolation, if detect when output power value reaches maximum, isolation detection module is judged in self-excitation state, the analog attenuation value that isolation=link gain+default attenuator is decontroled.
Step 3) and step 5) in adjust step value be 1dB.
Claims (3)
1. one kind is applicable to the method for detecting isolation between of high-gain and high-power repeater, the applicable repeater of the method comprises up link and down link, up link and down link include duplexer, power amplifier, intermediate-frequency filter, local oscillation signal generator, MCU module and low noise amplifier, described MCU module is carried out automatic gain control to up link and down link, it is characterized in that, described up link connects isolation and detects module, this isolation detects gain and the power of module for detection of up link, and be provided with numerical-control attenuator, described detection method comprises the following steps:
1) close the power amplifier of down link, the numerical-control attenuator that up link is set is 31dB;
2) threshold value of the automatic gain control of up link is set, by a relieving of starting to control for low noise amplifier, power amplifier;
3) numerical-control attenuator of progressively adjusting up link is by 31dB to 0dB;
4) be in course of adjustment and detect power output and the link gain of module detection up link by isolation, if detect when output power value reaches maximum, isolation detection module is judged in self-excitation state, the pad value of isolation=link gain-numerical-control attenuator; If output power value is unchanged, perform step 5);
5) decontrol the analog attenuation value of up link numerical-control attenuator, and to be progressively adjusted to this analog attenuation value by the preset value of this analog attenuation value be 0dB;
6) be in course of adjustment and detect power output and the link gain of module detection up link by isolation, if detect when output power value reaches maximum, isolation detection module is judged in self-excitation state, the analog attenuation value that isolation=link gain+numerical-control attenuator is open.
2. a kind of method for detecting isolation between that is applicable to high-gain and high-power repeater according to claim 1, is characterized in that step 3) and step 5) in adjust step value be 1dB.
3. a kind of method for detecting isolation between that is applicable to high-gain and high-power repeater according to claim 1, is characterized in that step 5) in the preset value of analog attenuation value be 15dB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210453875.8A CN103812581A (en) | 2012-11-13 | 2012-11-13 | Isolation detecting method applicable to high-gain and high-power repeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210453875.8A CN103812581A (en) | 2012-11-13 | 2012-11-13 | Isolation detecting method applicable to high-gain and high-power repeater |
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| CN103812581A true CN103812581A (en) | 2014-05-21 |
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| CN201210453875.8A Pending CN103812581A (en) | 2012-11-13 | 2012-11-13 | Isolation detecting method applicable to high-gain and high-power repeater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107659953A (en) * | 2017-11-13 | 2018-02-02 | 华普特科技（深圳）股份有限公司 | A kind of self-excitation protection adjustable attenuation method of wireless transceiver system |
| CN108292948A (en) * | 2015-10-14 | 2018-07-17 | 威尔逊电子有限责任公司 | The channelizing of Signal Booster |
| CN109617625A (en) * | 2018-11-23 | 2019-04-12 | 赛尔通信服务技术股份有限公司 | A kind of isolation between antennas measurement method |
| CN109639335A (en) * | 2018-12-20 | 2019-04-16 | 京信通信系统（中国）有限公司 | A kind of wireless discharging-directly station self-excitation processing method and device |
| US11218237B2 (en) | 2018-09-27 | 2022-01-04 | Wilson Electronics, Llc | Intermediate frequency (IF) filtering for enhanced crossover attenuation in a repeater |
-
2012
- 2012-11-13 CN CN201210453875.8A patent/CN103812581A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108292948A (en) * | 2015-10-14 | 2018-07-17 | 威尔逊电子有限责任公司 | The channelizing of Signal Booster |
| CN107659953A (en) * | 2017-11-13 | 2018-02-02 | 华普特科技（深圳）股份有限公司 | A kind of self-excitation protection adjustable attenuation method of wireless transceiver system |
| CN107659953B (en) * | 2017-11-13 | 2020-08-11 | 华普特科技（深圳）股份有限公司 | Self-excitation protection attenuation control method of wireless transceiving system |
| US11218237B2 (en) | 2018-09-27 | 2022-01-04 | Wilson Electronics, Llc | Intermediate frequency (IF) filtering for enhanced crossover attenuation in a repeater |
| CN109617625A (en) * | 2018-11-23 | 2019-04-12 | 赛尔通信服务技术股份有限公司 | A kind of isolation between antennas measurement method |
| CN109617625B (en) * | 2018-11-23 | 2021-09-24 | 赛尔通信服务技术股份有限公司 | Method for measuring distance between antennas |
| CN109639335A (en) * | 2018-12-20 | 2019-04-16 | 京信通信系统（中国）有限公司 | A kind of wireless discharging-directly station self-excitation processing method and device |
| CN109639335B (en) * | 2018-12-20 | 2021-03-19 | 京信通信系统（中国）有限公司 | Self-excitation processing method and device for wireless repeater |
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Application publication date: 20140521 |