CN1756114A - Automatic power adjusting apparatus and method for repeater in TDD system - Google Patents
Automatic power adjusting apparatus and method for repeater in TDD system Download PDFInfo
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- CN1756114A CN1756114A CN 200410080565 CN200410080565A CN1756114A CN 1756114 A CN1756114 A CN 1756114A CN 200410080565 CN200410080565 CN 200410080565 CN 200410080565 A CN200410080565 A CN 200410080565A CN 1756114 A CN1756114 A CN 1756114A
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Abstract
The invention discloses a method for dynamically regulating the power of direct-discharging station of TDD (time-division multiplex) system, which comprises an amplifying circuit, a digital modulation attenuator, a power amplifier, and a feedback loop serially formed by a coupler, a rectifier, an A/D sampler and a DSP. Wherein, the coupler is connected to one end of power amplifier, the DSP is connected to the digital modulation attenuator while the DSP via the switch sequence signal control the working condition of radio-frequency receiving-transmitting chain circuit of direct-discharging station. The invention also discloses a method relative to said device. The invention can realize the automatic modulation on the output power of direct-discharging station when confirming the communication quality, to make said direct-discharging station can cover more region and/or contain more users.
Description
Technical field
The present invention relates generally to a kind of self-adjusting apparatus and method of power of repeater, relate in particular to the self-adjusting apparatus and method of power of repeater in TDD (Time Division Duplex, the time division multiplexing) system.
Background technology
In the networking of TD-SCDMA system, adopt the TDD repeater to solve the interior signal service of base station coverage hole.When work in the repeater, downstream signal to power amplifier, arrives antenna through radio-frequency (RF) switch through the number controlled attenuator through after amplifying again; In the up-link, upward signal enters from antenna, enters in the up link through radio-frequency (RF) switch; Whole system is under the TDD sequential working, and power amplifier and radio-frequency (RF) switch are subjected to the effect of switching sequence signal, and in receiving sequential, down link all is idle.
Usually, the power output of repeater can change under the situation that different user lands and can influence speech quality.Suppose base station that the repeater receives except there not being other users in the coverage of repeater, the power output of repeater is set at 22dBm, and at this moment as shown in Figure 1, the repeater receives base station signal and also amplifies later output signal.If when having 4 users to login the repeater conversation in the coverage of repeater, the code channel power of repeater forward signal will be 22dBm (16+101g4=22), if have the user to login the repeater this moment again, code channel power will be greater than 22dBm (for example, if having 5 users, 16+101g5=23＞22), as shown in Figure 2, the power amplifier output signal poor linearity will cause other user's communication effects to worsen, even call drop.Just when power output was set at 22dBm, maximum calling user capacity simultaneously was 4.In addition, if (with respect to donor base station) has 4 users directly to log on the base station to use on the installation direction of repeater, the output signal of repeater also as shown in Figure 2, if the repeater has the user to land conversation down more like this, communication effect is with variation.That is to say that under the situation of customer volume greater than the maximum calling user capacity simultaneously that sets, the predefined power output in repeater can not satisfy the demand that guarantees normal talking.Therefore, the power adjustment of repeater is very necessary.
In the prior art to the power regulating method of repeater: because power monitoring mechanism is only monitored the power of synchronous head, by the gain of manual adjustment repeater, with the synchronous head power of output signal be controlled at setting performance number (+/-1dB).But, therefore on the contradictory problems that solves coverage and maximum user's access number, there is certain defective because the power regulating method of this repeater is not automatically in real time.When regional user more for a long time, manually reduce the power output of repeater, reserve surplus for multi-user's situation that may occur, every reduction 3dB, user capacity double (because 101g2=3), coverage is dwindled one times.But after the power output downward modulation, even if there is not the user like this, coverage distance also can diminish a lot, and the very difficult estimation of the maximum number of user amount in the coverage, causes the scene installation of repeater that the comparison difficulty is set, and is difficult to the coverage effect that reaches best.In addition, if the base station has other users simultaneously, even if the repeater does not have the user down, the signal code channel power of output just may be higher than the synchronous head power of system, the power output of repeater can only be set to very little value like this, could guarantee the linearity output of repeater, the coverage effect of repeater further dwindles like this.Because it all be the area of population than comparatively dense generally that the local of repeater need to be installed, as areas such as market, supermarkets, customer volume is all bigger, so that the repeater when mounted all can not be with the power output setting is very high.
Therefore, need a kind of power automatic adjusting method of repeater, under the condition that guarantees communication quality, realize adjusting automatically the power output of repeater, make this repeater cover in a big way and/or hold than the multi-user according to customer volume.
Summary of the invention
One aspect of the present invention has provided the power output automatic regulating apparatus of repeater in a kind of TDD system, comprise amplifying circuit, number controlled attenuator, power amplifier, it is characterized in that, also comprise a feedback loop that connects to form successively by coupler, wave detector, A/D sampler and DSP, wherein, coupler also links to each other with an end of power amplifier, DSP also links to each other with the number controlled attenuator, and simultaneously, DSP is by switching sequence signal controlling repeater radio-frequency receiving-transmitting chain operating state.
Another aspect of the present invention has provided the power output automatic adjusting method of repeater in a kind of TDD system, may further comprise the steps:
A. utilize coupler that the signal of power amplifier one end is coupled to wave detector;
B. wave detector becomes voltage signal with the conversion of signals that coupler transmits;
The voltage signal that c.A/D sampler dynamic acquisition wave detector detects sends DSP to;
D.DSP judges what and current power amplifier power output of customer volume according to sampled data, and then adjusts the attenuation of number controlled attenuator, comes guaranteed output amplifier power output constant.
Wherein, the A/D sampler is gathered code channel power and the two-part power level of synchronous head power simultaneously, selects the greater wherein as the foundation of adjusting gain.
Preferably, the frequency adjusted of gain be per 20 framing control once.
The invention solves the problem of original repeater power setting difficulty, power output can be set to the nominal power output simply, automatic adjustment can be realized in the repeater, when lacking the user, can reach maximum covers, when the multi-user, dwindle the use that coverage guarantees the multi-user automatically, make the repeater bring into play its maximum efficiency.Secondly, the present invention does not change the characteristic and the whole system compatibility of downstream signal.In addition, the less Temperature Influence that is subjected to of performance of the associated components that the present invention uses, so the power output of power amplifier is very little with variation of ambient temperature.
Description of drawings
Read following detailed description in conjunction with the accompanying drawings, other purposes of the present invention and advantage can become apparent.In the accompanying drawing:
Output signal time domain specification curve when Fig. 1 represents common repeater no user;
Output signal time domain specification curve when Fig. 2 represents common repeater multi-user;
Fig. 3 represents the power output automatic regulating apparatus realization block diagram of embodiment of the invention repeater;
Fig. 4 represents the power output automatic regulating apparatus realization block diagram of another embodiment of the present invention repeater.
Embodiment
Fig. 1 and Fig. 2 show, ordinary straight is put and stood under multi-user's (greater than setting maximum calling user capacity simultaneously) situation, and output signal is with respect to the signal poor linearity under the no user situation, and make communication effect descend.
Fig. 3 shows the power output automatic regulating apparatus of embodiment of the invention repeater and realizes block diagram.This embodiment device comprises amplifying circuit, number controlled attenuator, power amplifier, also comprise a feedback loop that connects to form successively by coupler, wave detector, A/D sampler and DSP, wherein, coupler also links to each other with the output of power amplifier, DSP also links to each other with the number controlled attenuator, simultaneously, DSP is by switching sequence signal controlling repeater radio-frequency receiving-transmitting chain operating state.
Among the figure, downstream signal to power amplifier, arrives retransmitting antenna through radio-frequency (RF) switch through the number controlled attenuator through after amplifying again.In the up-link, upward signal enters from antenna, enters in the up link through radio-frequency (RF) switch, whole system is to be operated under the TDD sequential (time division multiplexing mode), power amplifier and radio-frequency (RF) switch are subjected to the effect of switching sequence signal, and in the 5ms sequential that receives, down link all is idle.The power output automatic adjusting method of this repeater may further comprise the steps:
A. at first, coupler is coupled to wave detector with a part of signal of power amplifier output;
B. wave detector becomes voltage signal with the conversion of signals that coupler transmits;
The voltage signal that c.A/D sampler dynamic acquisition wave detector detects promptly, is gathered code channel power and the two-part power level of synchronous head power simultaneously, and selecting wherein, the greater sends DSP to as the foundation of adjusting gain;
D.DSP judges what and current power amplifier power output of customer volume according to sampled data, and then adjusts the attenuation of number controlled attenuator, comes guaranteed output amplifier power output constant; That is, the data of sampled data and established standards power correspondence are compared,, reduce the power output of power amplifier by the attenuation that strengthens attenuator in the link if sampled data overgauge set point shows that then power amplifier output power is too big.
Because same output power amplifier must make power output to adjust dynamically in real time according to the yield value of how much adjusting the repeater of customer volume.When customer volume was less than 4, code channel power was less than synchronous head power, because code channel power is low, synchronous head power is set to 22dBm by gain adjustment, reach the effect of best coverage distance, customer volume was greater than 4 o'clock, and code channel power is greater than synchronous head power, when code channel power surpasses 22dBm, be used as the sampling foundation, link gain diminishes, and this moment, synchronous head power diminished, coverage distance diminishes, but has guaranteed all users' normal use.Other originally in the overlay area user far away since synchronous head power step-down land searching for new base station again.After the multi-user discharged, code channel power was again less than synchronous head power, and sampled point becomes the synchronous head place again, the lifting of synchronous head power, and coverage is recovered.The frequency that gain is adjusted is that per 20 frames (promptly 0.2 second) are adjusted once, each gain controlling word of adjusting changes 1, has both guaranteed in time to adjust gain, adapts to the switching between multi-user and the coverage distance, guarantee that simultaneously power output do not suddenly change, do not influence terminal use's use.
Fig. 4 shows the power output automatic regulating apparatus of another embodiment of the present invention repeater and realizes block diagram.This method and method shown in Figure 3 are similar, just the control point are transferred to before the power amplifier, and principle as above.The advantage of this method is the input signal of power amplifier to be controlled at a fixed value.Because the existence of various complex electromagnetic environments, perhaps circuit working is unusual, can cause producing very strong large-signal in the circuit suddenly, if in the monitoring of power amplifier rear end, may have little time the adjustment that gains, power amplifier is burnt.Power amplifier can effectively be protected in advance in the control point, and in the particularly high-power repeater, the price of power amplifier is generally considerable, and wherein Jue Dabufen cost is exactly a power amplifier, and providing as much as possible, protection is very necessary.The control point places the front end of power amplifier among this embodiment, can make input power constant, but still will consider because power amplifier makes the device that varies with temperature the comparison sensitivity, thereby the final output of antenna may be the value of a variation.Certainly, can be at the equal monitoring and protecting in addition of the input of power amplifier and output.Consider the cost problem, and adopt in the practice be low-power amplifier, adopt the self-adjusting device and method of power output of realization repeater shown in Figure 3 better.
The present invention has set and has adjusted frequency, rather than adjust in real time, this is because terminal inserts according to synchronous head power, carry out the power adjustment according to code channel power, the synchronous head power that each mobile phone receives and the difference of code channel power are steady state values, under the power output method of adjustment of repeater of the present invention, whole channel gain changes simultaneously, guaranteed this mechanism, this variation only takes place when having the user to insert or discharging, can be very not frequent.If adopt the realtime power adjustment, synchronous head power is identical in real time with code channel power, all like this during for single user and multi-user, like this for single user, synchronous head power and code channel power relative value can change, terminal is wanted operate as normal, need to revise power control mechanism, and a lot of cellphone subscribers are arranged, can't carry out program updates at network operation, the terminal aspect of version is considered before the compatibility, can not adopt the realtime power method of adjustment.
Apparatus and method of the present invention have solved the contradictory problems of coverage and maximum user's access number effectively.
Claims (6)
1, the power output automatic regulating apparatus of repeater in a kind of TDD system, comprise amplifying circuit, number controlled attenuator, power amplifier, it is characterized in that, also comprise a feedback loop that connects to form successively by coupler, wave detector, A/D sampler and DSP, wherein, coupler also links to each other with an end of power amplifier, DSP also links to each other with the number controlled attenuator, and simultaneously, DSP is by switching sequence signal controlling repeater radio-frequency receiving-transmitting chain operating state.
2, the power output automatic regulating apparatus of repeater in the TDD according to claim 1 system is characterized in that described coupler links to each other with the output of power amplifier.
3, the power output automatic regulating apparatus of repeater in the TDD according to claim 1 system is characterized in that described coupler links to each other with the input of power amplifier.
4, a kind of power output automatic adjusting method of utilizing the described device of claim 1 to carry out repeater in the TDD system is characterized in that this method may further comprise the steps:
A. utilize coupler that the signal of power amplifier one end is coupled to wave detector;
B. wave detector becomes voltage signal with the conversion of signals that coupler transmits;
The voltage signal that c.A/D sampler dynamic acquisition wave detector detects sends DSP to;
D.DSP judges what and current power amplifier power output of customer volume according to sampled data, and then adjusts the gain of number controlled attenuator, comes guaranteed output amplifier power output constant.
Wherein, the A/D sampler is gathered code channel power and the two-part power level of synchronous head power simultaneously, selects the greater wherein as the foundation of adjusting gain.
5, method as claimed in claim 4 is characterized in that, the frequency that gain is adjusted be per 20 framing control once.
6, as claim 4 or 5 described methods, it is characterized in that, adjust the gain controlling word at every turn and change 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100805651A CN100380841C (en) | 2004-09-28 | 2004-09-28 | Automatic power adjusting apparatus and method for repeater in TDD system |
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| CNB2004100805651A CN100380841C (en) | 2004-09-28 | 2004-09-28 | Automatic power adjusting apparatus and method for repeater in TDD system |
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| CN1756114A true CN1756114A (en) | 2006-04-05 |
| CN100380841C CN100380841C (en) | 2008-04-09 |
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| CNB2004100805651A Expired - Fee Related CN100380841C (en) | 2004-09-28 | 2004-09-28 | Automatic power adjusting apparatus and method for repeater in TDD system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463555C (en) * | 2006-08-22 | 2009-02-18 | 京信通信技术(广州)有限公司 | TD-SCDMA shrouding system and its time slot power reading method |
| CN101072420B (en) * | 2007-06-18 | 2010-12-08 | 中兴通讯股份有限公司 | TD-SCDMA transmitter open/close time domain template testing method |
| CN105992329A (en) * | 2015-02-27 | 2016-10-05 | 展讯通信（上海）有限公司 | Signal amplification device and control method thereof, and method for identification of signal amplification device |
| CN104753616B (en) * | 2013-12-30 | 2018-01-26 | 展讯通信（上海）有限公司 | The automatic gain control calibration method and apparatus of communication terminal |
| CN107743039A (en) * | 2017-11-18 | 2018-02-27 | 国家电网公司 | A kind of GPRS acquisition terminals signal strength self-adapting data test and transmitting device |
| CN107819476A (en) * | 2017-11-18 | 2018-03-20 | 国家电网公司 | The lightning protection antenna and system of a kind of extremely strong and pole weak signal for GPRS acquisition terminals |
| CN112437482A (en) * | 2019-08-26 | 2021-03-02 | 中国移动通信有限公司研究院 | TDD communication equipment, TDD communication system and power adjusting method |
| CN113573399A (en) * | 2021-07-16 | 2021-10-29 | 广州市瀚云信息技术有限公司 | Power control method and device for repeater |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08307182A (en) * | 1995-04-27 | 1996-11-22 | Sony Corp | Power control circuit |
| JP3646906B2 (en) * | 1997-03-21 | 2005-05-11 | 株式会社日立国際電気 | Wireless repeater amplifier |
| DK199801471A (en) * | 1998-11-13 | 2000-05-14 | Polar Lab V Hans Erik Iversen | Method and apparatus for accurately measuring return loss over a large dynamic range |
| JP3866042B2 (en) * | 1999-03-01 | 2007-01-10 | 三菱電機株式会社 | Transmission power control apparatus and transmission power control method |
| CN1165186C (en) * | 2001-03-14 | 2004-09-01 | 上海大唐移动通信设备有限公司 | RF powder controller and control method suitable for non-constant envelope modulation |
| CN1210967C (en) * | 2001-05-31 | 2005-07-13 | 中兴通讯股份有限公司 | Linear power amplification method and power amplifier unit based on feedforward technique |
-
2004
- 2004-09-28 CN CNB2004100805651A patent/CN100380841C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463555C (en) * | 2006-08-22 | 2009-02-18 | 京信通信技术(广州)有限公司 | TD-SCDMA shrouding system and its time slot power reading method |
| CN101072420B (en) * | 2007-06-18 | 2010-12-08 | 中兴通讯股份有限公司 | TD-SCDMA transmitter open/close time domain template testing method |
| CN104753616B (en) * | 2013-12-30 | 2018-01-26 | 展讯通信（上海）有限公司 | The automatic gain control calibration method and apparatus of communication terminal |
| CN105992329A (en) * | 2015-02-27 | 2016-10-05 | 展讯通信（上海）有限公司 | Signal amplification device and control method thereof, and method for identification of signal amplification device |
| CN105992329B (en) * | 2015-02-27 | 2019-09-06 | 展讯通信（上海）有限公司 | The method of signal amplifying apparatus and its control method, identification signal amplifying device |
| CN107743039A (en) * | 2017-11-18 | 2018-02-27 | 国家电网公司 | A kind of GPRS acquisition terminals signal strength self-adapting data test and transmitting device |
| CN107819476A (en) * | 2017-11-18 | 2018-03-20 | 国家电网公司 | The lightning protection antenna and system of a kind of extremely strong and pole weak signal for GPRS acquisition terminals |
| CN107743039B (en) * | 2017-11-18 | 2023-06-02 | 国家电网公司 | GPRS acquisition terminal signal strength self-adaptive data testing and transmitting device |
| CN107819476B (en) * | 2017-11-18 | 2023-08-11 | 国家电网公司 | Lightning protection antenna and system for GPRS acquisition terminal |
| CN112437482A (en) * | 2019-08-26 | 2021-03-02 | 中国移动通信有限公司研究院 | TDD communication equipment, TDD communication system and power adjusting method |
| CN113573399A (en) * | 2021-07-16 | 2021-10-29 | 广州市瀚云信息技术有限公司 | Power control method and device for repeater |
| CN113573399B (en) * | 2021-07-16 | 2022-10-14 | 广州市瀚云信息技术有限公司 | Power control method and device for repeater |
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| CN100380841C (en) | 2008-04-09 |
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