CN101965041B - Adjustment method and device of TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) receive automatic gain control - Google Patents
Adjustment method and device of TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) receive automatic gain control Download PDFInfo
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- CN101965041B CN101965041B CN 200910055212 CN200910055212A CN101965041B CN 101965041 B CN101965041 B CN 101965041B CN 200910055212 CN200910055212 CN 200910055212 CN 200910055212 A CN200910055212 A CN 200910055212A CN 101965041 B CN101965041 B CN 101965041B
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Abstract
The invention discloses a method and a device for adjusting TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) receive automatic gain control, which are used for adjusting the intensity of a received signal to an ideal value in one step and tracking the change of the intensity of the received signal in real time. According to the technical scheme, the method comprises the following steps of: (1) monitoring whether the intensity of the received signal changes or not; (2) when the intensity of the received signal changes, demodulating transmitting power control which is transmitted by a base station at the time and used for transmitting automatic power control and a power adjustment step length broadcast in a system; (3) obtaining the adjustment step number of an increased or decreased receive gain according to a demodulated transmitting power control word, obtaining a gain adjustment value corresponding to the adjustment step number of each receive gain according to the demodulated power adjustment step length, and calculating a receive gain adjustment value according to the adjustment step number of the receive gain and the gain adjustment value corresponding to the adjustment step number of each receive gain; and (4) realizing close loop control of receive automatic gain control adjustment through the receive gain adjustment value. The invention is applied to the field of wireless communication.
Description
Technical field
The present invention relates to receive in a kind of 3G system method of adjustment and the device of automatic gain control system, relate in particular to method of adjustment and the device of the automatic gain control system of reception in a kind of TD-SCDMA system.
Background technology
In radio communication, due to the mobility of terminal and the complexity of wireless channel, the signal strength signal intensity that terminal is received constantly changes.This just requires terminal to adjust in real time the gain of receiving unit, and making the reception IQ signal that is input to baseband processor is a constant value, facilitates the processing of baseband processor.
(automatic gain is controlled at traditional reception AGC, Auto Gain Control) in adjustment algorithm, when the change in signal strength that receives, owing to can not accurately knowing the changing value that receives signal, can only do with a fixed step size trial adjustment of non-closed loop, need just to adjust to ideal value after two to three steps variation that can not the real-time tracking received signal strength.
Summary of the invention
The object of the invention is to address the above problem, the method for adjustment that provides a kind of TD-SCDMA to receive automatic gain control system, the mode by the closed loop adjustment settles at one go adjusts to ideal value with received signal strength, variation that can the real-time tracking received signal strength.
Another object of the present invention is to provide a kind of TD-SCDMA to receive the adjusting device of automatic gain control system.
Technical scheme of the present invention is: the present invention proposes the method for adjustment that a kind of TD-SCDMA receives automatic gain control system, comprising:
(1) whether the intensity of monitoring reception signal changes;
(2) when the intensity that receives signal changes, demodulate the transmitting power control word that is used for the control of emission automated power that this moment, the base station issued and adjust step-length at the power that system broadcasts;
(3) obtain according to the transmitting power control word that demodulates the adjustment step number that receiving gain should increase or reduce, adjust according to the power that demodulates gain adjustment value corresponding to adjustment step number that step-length obtains each receiving gain, calculate the receiving gain adjusted value according to the adjustment step number of receiving gain and the gain adjustment value corresponding to adjustment step number of each receiving gain;
(4) realize receiving by the receiving gain adjusted value closed-loop control that automatic gain control system is adjusted.
Whether receive an embodiment of the method for adjustment of automatic gain control system according to TD-SCDMA of the present invention, the monitoring in step (1) is undertaken by receiver, and send into the intensity that judgement in baseband controller receives signal and change receiving a signal.
Receive an embodiment of the method for adjustment of automatic gain control system according to TD-SCDMA of the present invention, demodulate the transmitting power control word that this moment, the base station issued and the power of broadcasting in step (2) and adjust step-length and carry out in baseband controller in system.
Receive an embodiment of the method for adjustment of automatic gain control system according to TD-SCDMA of the present invention, the acquisition of the gain adjustment value that the adjustment step number that in step (3), receiving gain should increase or reduce, the adjustment step number of each receiving gain are corresponding and the calculating of receiving gain adjusted value are all carried out in receiving automatic gain controlling circuit.
Receive an embodiment of the method for adjustment of automatic gain control system according to TD-SCDMA of the present invention, in step (3), the adjustment step number that the represented transmitting power of the transmitting power control word that demodulates should increase or reduce equals the adjustment step number that receiving gain should increase or reduce, the power of the transmitting power that demodulates is adjusted gain adjustment value corresponding to adjustment step number that step-length equals each receiving gain, and the receiving gain adjusted value is the product of gain adjustment value corresponding to the adjustment step number of the receiving gain adjustment step number that should increase or reduce and each receiving gain.
Receive an embodiment of the method for adjustment of automatic gain control system according to TD-SCDMA of the present invention, the closed-loop control that receives the adjustment processed of automatic gain control in step (4) is controlled the receiver realization by receiving automatic gain controlling circuit.
The invention allows for the adjusting device that a kind of TD-SCDMA receives automatic gain control system, comprising:
Receiver, monitoring receives signal;
Baseband controller receives the reception signal that receiver is sent into, and when the receiving intensity that receives signal changed, the power that demodulates the transmitting power control word that this moment, the base station issued and the transmitting power of broadcasting in system was adjusted step-length;
Receiving automatic gain controlling circuit, obtain according to the transmitting power control word that demodulates the adjustment step number that receiving gain should increase or reduce, adjust according to the power that demodulates gain adjustment value corresponding to adjustment step number that step-length obtains each receiving gain, calculate the receiving gain adjusted value according to the adjustment step number of receiving gain and the gain adjustment value corresponding to adjustment step number of each receiving gain, adopt the receiving gain adjusted value that obtains to control receiver and realize receiving the closed-loop control that automatic gain control system is adjusted.
receive an embodiment of the method for adjustment of automatic gain control system according to TD-SCDMA of the present invention, in receiving automatic gain controlling circuit, the adjustment step number that the represented transmitting power of the transmitting power control word that demodulates should increase or reduce equals the adjustment step number that receiving gain should increase or reduce, the power of the transmitting power that demodulates is adjusted gain adjustment value corresponding to adjustment step number that step-length equals each receiving gain, the receiving gain adjusted value is the product of gain adjustment value corresponding to the adjustment step number of the receiving gain adjustment step number that should increase or reduce and each receiving gain.
The present invention contrasts prior art following beneficial effect: the transmitting power control word (TPC, Transmitter PowerControl) that technical scheme utilization of the present invention originally was used for the control of emission automated power has realized the closed-loop control that AGC adjusts.Compared with prior art, the present invention does the trial adjustment of non-closed loop with a fixed step size, but calculate final receiving gain adjusted value by TPC, the intensity that can will receive signal according to this adjusted value is adjusted to ideal value with settling at one go, can realize like this variation of real-time tracking received signal strength.
Description of drawings
Fig. 1 is the flow chart of the embodiment of the TD-SCDMA of the present invention method of adjustment that receives automatic gain control system.
Fig. 2 is the block diagram of the embodiment of the TD-SCDMA of the present invention adjusting device that receives automatic gain control system.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Before introducing embodiments of the invention, first illustrate the present invention based on principle.In the TD-SCDMA system, the TPC control word is to be handed down to the power control word of terminal (for example mobile phone) according to the variation of wireless communications environment by the base station.The TPC control word can increase or reduce transmitting power with a fixed step size by control terminal.The TPC control word only acts on emission APC (Auto PowerControl, automated power is controlled) control traditionally, and AGC control is irrelevant with receiving.Because TD-SCDMA is a strict power control system, the base station requires transmitting of terminal identical when arriving the base station.When wireless communications environment changed (for example change of distance and decline), the base station can require the transmitting power of mobile phone increase or reduce by the TPC control word, so the TPC control word has reflected the variation of current wireless communication environment.
Due to TD-SCDMA system transmit-receive cofrequency, thus transmit and receive signal the variation reflection be all the characteristic of same spacing wireless channel.When characteristics of radio channels changes or because fast mobile terminal causes terminal that the base station receives to transmit becoming greatly or when diminishing, the base station can send the TPC control word to terminal according to the requirement of closed-loop power control, allow the transmitting power of terminal diminish or to become large, the mobile phone signal power invariability that makes the base station receive.The obvious value of TPC control word has at this moment just represented the changing value of terminal transmit power, the changing value of namely space channel transmission attenuation.Due in whole residential quarter, the transmitting power of base station is constant equally, so the TPC control word has also represented the changing value of the signal strength signal intensity that terminal receives.The present invention utilizes the TPC control word to realize the closed-loop control that AGC adjusts.
TD-SCDMA receives the embodiment of the method for adjustment of automatic gain control system
Fig. 1 shows the embodiment that TD-SCDMA of the present invention receives the method for adjustment of automatic gain control system.See also Fig. 1, the detailed step of the method for adjustment of the present embodiment is as described below.
Step S10: monitoring receives signal.This step realizes in receiver.
Step S11: whether the intensity that judgement receives signal changes, if change enter step S12, otherwise flow process finishes.Usually, receiver will receive signal and send into baseband controller, and whether the intensity of judgement reception signal changes in baseband controller.
Step S12: demodulate the emission automated power that is used for that this moment, the base station issued and control the transmitting power control word (TPC) of (APC) and adjust step-length at the power that system broadcasts.The step of demodulation is also carried out in baseband controller, specifically how demodulation to be those of ordinary skills namely attainable in conjunction with common practise, therefore repeat no more.
Step S13: obtain according to the transmitting power control word that demodulates the adjustment step number that receiving gain should increase or reduce, adjust according to the power that demodulates gain adjustment value corresponding to adjustment step number that step-length obtains each receiving gain.
In step S13, the adjustment step number that the represented transmitting power of the transmitting power control word that demodulates should increase or reduce equals the adjustment step number that receiving gain should increase or reduce, and the power of the transmitting power that demodulates is adjusted gain adjustment value corresponding to adjustment step number that step-length equals each receiving gain.
Step S14: calculate the receiving gain adjusted value according to the adjustment step number of receiving gain and the gain adjustment value corresponding to adjustment step number of each receiving gain.
In step S14, the receiving gain adjusted value is the product of gain adjustment value corresponding to the adjustment step number of the receiving gain that obtains in the step S13 adjustment step number that should increase or reduce and each receiving gain.
Step S15: realize receiving the closed-loop control that automatic gain control system is adjusted by the receiving gain adjusted value.After those of ordinary skills have been known the receiving gain adjusted value, specifically how to go to realize that according to this adjusted value the closed-loop control that the automatic gain control system of reception (AGC) is adjusted is namely attainable in conjunction with common practise and conventional techniques means, therefore repeat no more.
Step S15 is that receiver is realized under the control of receiving gain adjusted value.
TD-SCDMA receives the embodiment of the method for adjustment of automatic gain control system
Fig. 2 shows the embodiment that TD-SCDMA of the present invention receives the adjusting device of automatic gain control system.See also Fig. 2, the below is the detailed description to the principle of the adjusting device of the present embodiment.The adjusting device of the present embodiment comprises three modules: receiver 10, the baseband controller 12 that is electrically connected with receiver 10, with the receiving automatic gain controlling circuit 14 that baseband controller 12 is electrically connected, receiving automatic gain controlling circuit 14 is electrically connected receivers 10.
Receiving automatic gain controlling circuit 14 obtains according to the transmitting power control word that demodulates the adjustment step number that receiving gain should increase or reduce, and the adjustment step number that the represented transmitting power of the transmitting power control word that namely demodulates should increase or reduce equals the adjustment step number that receiving gain should increase or reduce.Receiving automatic gain controlling circuit 14 adjusts according to the power of the transmitting power that demodulates gain adjustment value corresponding to adjustment step number that step-length obtains each receiving gain, and the power of the transmitting power that namely demodulates is adjusted gain adjustment value corresponding to adjustment step number that step-length equals each receiving gain.The gain adjustment value that receiving automatic gain controlling circuit 14 is corresponding according to the adjustment step number of the adjustment step number of receiving gain and each receiving gain is calculated total receiving gain adjusted value, and namely the product of gain adjustment value corresponding to the adjustment step number of the receiving gain adjustment step number that should increase or reduce and each receiving gain is total receiving gain adjusted value.At last, receiving automatic gain controlling circuit 14 adopts the total receiving gain adjusted value that obtains to control receiver 10 and realizes receiving the closed-loop control that automatic gain control system is adjusted.
Above-described embodiment is to provide to those of ordinary skills and realizes or use of the present invention; those of ordinary skills can be in the situation that do not break away from invention thought of the present invention; above-described embodiment is made various modifications or variation; thereby protection scope of the present invention do not limit by above-described embodiment, and should be the maximum magnitude that meets the inventive features that claims mention.
Claims (8)
1. a TD-SCDMA receives the method for adjustment of automatic gain control system, comprising:
(1) whether the intensity of monitoring reception signal changes;
(2) when the intensity that receives signal changes, demodulate the transmitting power control word that is used for the control of emission automated power that this moment, the base station issued and adjust step-length at the power that system broadcasts;
(3) obtain according to the transmitting power control word that demodulates the adjustment step number that receiving gain should increase or reduce, adjust according to the power that demodulates gain adjustment value corresponding to adjustment step number that step-length obtains each receiving gain, calculate the receiving gain adjusted value according to the adjustment step number of receiving gain and the gain adjustment value corresponding to adjustment step number of each receiving gain;
(4) realize receiving by the receiving gain adjusted value closed-loop control that automatic gain control system is adjusted.
2. TD-SCDMA according to claim 1 receives the method for adjustment of automatic gain control system, it is characterized in that, whether the monitoring of the reception signal in step (1) is undertaken by receiver, and send into the intensity that judgement in baseband controller receives signal and change receiving a signal.
3. TD-SCDMA according to claim 1 receives the method for adjustment of automatic gain control system, it is characterized in that, demodulate in step (2) this moment the transmitting power control word that issues of base station and the power of broadcasting in system adjust step-length and carry out in baseband controller.
4. TD-SCDMA according to claim 1 receives the method for adjustment of automatic gain control system, it is characterized in that, the acquisition of the gain adjustment value that the adjustment step number that receiving gain should increase or reduce in step (3), the adjustment step number of each receiving gain are corresponding and the calculating of receiving gain adjusted value are all carried out in receiving automatic gain controlling circuit.
5. TD-SCDMA according to claim 1 receives the method for adjustment of automatic gain control system, it is characterized in that, in step (3), the adjustment step number that the represented transmitting power of the transmitting power control word that demodulates should increase or reduce equals the adjustment step number that receiving gain should increase or reduce, the power that demodulates is adjusted gain adjustment value corresponding to adjustment step number that step-length equals each receiving gain, and the receiving gain adjusted value is the product of gain adjustment value corresponding to the adjustment step number of the receiving gain adjustment step number that should increase or reduce and each receiving gain.
6. TD-SCDMA according to claim 1 receives the method for adjustment of automatic gain control system, it is characterized in that, the closed-loop control that receives the adjustment processed of automatic gain control in step (4) is controlled the receiver realization by receiving automatic gain controlling circuit.
7. a TD-SCDMA receives the adjusting device of automatic gain control system, comprising:
Receiver, monitoring receives signal;
Baseband controller receives the reception signal that receiver is sent into, and when the receiving intensity that receives signal changed, the power that demodulates the transmitting power control word that this moment, the base station issued and the transmitting power of broadcasting in system was adjusted step-length;
Receiving automatic gain controlling circuit, obtain according to the transmitting power control word that demodulates the adjustment step number that receiving gain should increase or reduce, adjust according to the power that demodulates gain adjustment value corresponding to adjustment step number that step-length obtains each receiving gain, calculate the receiving gain adjusted value according to the adjustment step number of receiving gain and the gain adjustment value corresponding to adjustment step number of each receiving gain, adopt the receiving gain adjusted value that obtains to control receiver and realize receiving the closed-loop control that automatic gain control system is adjusted.
8. TD-SCDMA according to claim 7 receives the adjusting device of automatic gain control system, it is characterized in that, in receiving automatic gain controlling circuit, the adjustment step number that the represented transmitting power of the transmitting power control word that demodulates should increase or reduce equals the adjustment step number that receiving gain should increase or reduce, the power that demodulates is adjusted gain adjustment value corresponding to adjustment step number that step-length equals each receiving gain, the receiving gain adjusted value is the product of gain adjustment value corresponding to the adjustment step number of the receiving gain adjustment step number that should increase or reduce and each receiving gain.
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| CN 200910055212 CN101965041B (en) | 2009-07-23 | 2009-07-23 | Adjustment method and device of TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) receive automatic gain control |
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| CN 200910055212 CN101965041B (en) | 2009-07-23 | 2009-07-23 | Adjustment method and device of TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) receive automatic gain control |
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| CN103702391B (en) * | 2013-11-30 | 2017-05-03 | 北京智谷睿拓技术服务有限公司 | Broadcasting method, broadcasting equipment, scanning method and scanning equipment for wireless communication |
| CN103686610B (en) | 2013-11-30 | 2017-06-16 | 北京智谷睿拓技术服务有限公司 | The broadcasting method and equipment of a kind of radio communication |
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| US5283536A (en) * | 1990-11-30 | 1994-02-01 | Qualcomm Incorporated | High dynamic range closed loop automatic gain control circuit |
| CN1236237A (en) * | 1998-02-10 | 1999-11-24 | 松下电器产业株式会社 | Transmitting power controller and radio communication device |
| CN1945997A (en) * | 2006-10-24 | 2007-04-11 | 重庆重邮信科股份有限公司 | Design method for radio frequency automatic power control module of TD-SCDMA terminal and its circuit |
| CN101075831A (en) * | 2006-10-10 | 2007-11-21 | 浙江华立通信集团有限公司 | Method for controlling transmitting power of TD-SCDMA mobile telecommunication system by uncontinuous transmission state value |
| CN101330279A (en) * | 2007-06-21 | 2008-12-24 | 夏普株式会社 | Automatic gain control circuit, receiving apparatus and automatic gain control method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5283536A (en) * | 1990-11-30 | 1994-02-01 | Qualcomm Incorporated | High dynamic range closed loop automatic gain control circuit |
| CN1236237A (en) * | 1998-02-10 | 1999-11-24 | 松下电器产业株式会社 | Transmitting power controller and radio communication device |
| CN101075831A (en) * | 2006-10-10 | 2007-11-21 | 浙江华立通信集团有限公司 | Method for controlling transmitting power of TD-SCDMA mobile telecommunication system by uncontinuous transmission state value |
| CN1945997A (en) * | 2006-10-24 | 2007-04-11 | 重庆重邮信科股份有限公司 | Design method for radio frequency automatic power control module of TD-SCDMA terminal and its circuit |
| CN101330279A (en) * | 2007-06-21 | 2008-12-24 | 夏普株式会社 | Automatic gain control circuit, receiving apparatus and automatic gain control method |
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