CN101807901A - Method, device and system for controlling signal attenuation - Google Patents
Method, device and system for controlling signal attenuation Download PDFInfo
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- CN101807901A CN101807901A CN200910105474A CN200910105474A CN101807901A CN 101807901 A CN101807901 A CN 101807901A CN 200910105474 A CN200910105474 A CN 200910105474A CN 200910105474 A CN200910105474 A CN 200910105474A CN 101807901 A CN101807901 A CN 101807901A
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Abstract
The invention discloses a method, a device and a system for controlling signal attenuation, which are used for communication technology. The method comprises the following steps: sending a current control word to a control interface to control a numerically controlled attenuator for carrying out signal attenuation; receiving an updated control word; carrying out OR operation on the current control word and the updated control word to generate a transition control word; sending the transition control word to the control interface to control the numerically controlled attenuator for carrying out signal attenuation; and sending the updated control word to the control interface to control the numerically controlled attenuator for carrying out signal attenuation, thereby effectively controlling the overshoot signals generated when the numerically controlled attenuator controls the change of the signal decrement.
Description
Technical field
The present invention relates to the communication technology, be specifically related to signal attenuation control method, device and system in a kind of communication system.
Background technology
A lot of electronic equipments, as, radar, communication apparatus, radio lan equipment and GPS, all need to use attenuator that intermediate frequency or high-frequency signal are quantitatively decayed, this decay comes down to process high, that intermediate-freuqncy signal is carried out precise quantification, the precision of described quantification will directly have influence on the test of these equipment performance indexs or described equipment performance index, and then have influence on their serviceability.
Numerical-control attenuator is a kind of attenuator easy to use.Present numerical-control attenuator passes through the attenuation of the switching change of switch to signal, described switching stage joint group is become multiple-pole switch, form the numerical-control attenuator that can carry out the stepping decay to signal by the switching of multiple-pole switch, described numerical-control attenuator is controlled attenuation by serial or parallel interface Input Control Word.
The overshoot of signal when changing, can take place in the control attenuation in present numerical-control attenuator, and promptly the attenuation of signal is of short duration reduces or increase.If the device of the maximum excess input signal that reaches of overshoot bear the device failure that the upper limit can make described input signal; If frequently exceeding the rated value of the device of described input signal, the signal value that overshoot reached to make described device accelerated ageing; The overshoot of signal also can impact the precision of the test of described equipment performance index or described equipment performance index.
In realizing process of the present invention, the inventor finds: the scheme that the overshoot signal that does not produce when attenuation changes for numerical-control attenuator in the prior art is controlled.
Summary of the invention
The embodiment of the invention provides a kind of signal attenuation control method, device and system, has effectively controlled the overshoot signal that numerical-control attenuator is produced when the control signal attenuation changes.
The embodiment of the invention provides a kind of signal attenuation control method, current control word is sent to control interface carry out signal attenuation with the control numerical-control attenuator.Receive and upgrade control word, described current control word and described renewal control word are done exclusive disjunction, generate the transition control word, described transition control word is sent to described control interface carry out signal attenuation to control described numerical-control attenuator.Described renewal control word is sent to control interface carry out signal attenuation to control described numerical-control attenuator.
The embodiment of the invention provides a kind of signal attenuation control method, and transmitting element sends the renewal control word to described memory cell and described arithmetic element;
The renewal control word that memory cell receives and the storage arithmetic element sends, the current control word of storage is sent to described arithmetic element,, after control interface sends the transition control word, described renewal control word is sent to control interface as current control word carry out signal attenuation in described arithmetic element with the control numerical-control attenuator;
Described arithmetic element is carried out exclusive disjunction to the current control word of described cell stores and from the renewal control word of described transmitting element, generate described transition control word, described transition control word is sent to described control interface carry out signal attenuation with the control numerical-control attenuator.
The embodiment of the invention provides a kind of signal attenuation control device, and described control device comprises memory cell, arithmetic element and transmitting element,
Described transmitting element is used for sending the renewal control word to described memory cell and described arithmetic element.Described memory cell, be used to receive and store the renewal control word that described arithmetic element sends, and the current control word that will store sends to described arithmetic element, and in described arithmetic element after described control interface sends the transition control word, described renewal control word is sent to control interface as current control word carries out signal attenuation with the control numerical-control attenuator.Described arithmetic element, be used for carrying out exclusive disjunction to the current control word of described cell stores and from the renewal control word of described transmitting element, generate described transition control word, described transition control word is sent to described control interface carry out signal attenuation with the control numerical-control attenuator.
The embodiment of the invention provides a kind of signal attenuation system, comprise numerical-control attenuator and control interface, also comprise the described signal attenuation control device of the foregoing description, described signal attenuation control device links to each other with described control interface in the mode that can communicate by letter, controls described numerical-control attenuator by described control interface and carries out signal attenuation.
The embodiment of the invention provides a kind of multi-carrier signal attenuation control system, comprise numerical-control attenuator, the control interface consistent with the carrier wave number of phases, described control interface links to each other with described numerical-control attenuator, it is characterized in that, also comprise the signal attenuation control device consistent with the carrier wave number of phases, corresponding described control interface of described damping controller also links to each other with described control interface, described signal attenuation control device sends control word in the mode that can communicate by letter to described control interface and carries out signal attenuation to control described numerical-control attenuator, described signal attenuation control device sends current control word according to order to the described control interface corresponding with it and to control described numerical-control attenuator corresponding subcarrier is carried out signal attenuation, described signal attenuation control device receives corresponding renewal control word according to described order, the current control word of the correspondence of described reception is done exclusive disjunction with described corresponding renewal control word, generate corresponding transition control word, the control interface that described transition control word is sent to described correspondence according to described order carries out signal attenuation to control described numerical-control attenuator according to described order, and described signal attenuation control device sends to described control interface according to described order with described renewal control word and to control described numerical-control attenuator corresponding subcarrier carried out signal attenuation.
The mechanism that the embodiment of the invention produces according to the overshoot signal by the control word of input is controlled, can effectively suppress the overshoot signal that numerical-control attenuator is produced when the control signal attenuation changes.
Description of drawings
Fig. 1 is the structure and the functional schematic of a kind of signal attenuation system;
The implementing procedure figure of the signal attenuation control method that Fig. 2 provides for the embodiment of the invention;
The structural representation of a kind of signal attenuation control device that Fig. 3 provides for the embodiment of the invention;
The structural representation of a kind of signal attenuation control system that Fig. 4 provides for the embodiment of the invention;
The structural representation of a kind of multi-carrier signal attenuation control system that Fig. 5 provides for the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of signal attenuation control method, device and system, and the overshoot signal that can effectively produce when the control signal attenuation changes numerical-control attenuator is controlled.
As shown in Figure 1, a kind of signal attenuation of the prior art system, comprise numerical-control attenuator 101 and control interface 102, numerical-control attenuator 101 receives control word by control interface 102, so that numerical-control attenuator 101 is for the carrier signal generation and the corresponding attenuation of described control word of input, the carrier signal of output after overdamping.
Numerical-control attenuator 101 carries out the signal attenuation of respective attenuation amount according to the control word that control interface 102 receives to signal.With the control interface 102 and the corresponding numerical-control attenuator 101 that can receive six control words is example, and the corresponding relation of the attenuation that 101 pairs of signals of the control word of its input and described numerical-control attenuator are decayed is as shown in the table:
The inventor finds: when described control word changes, change to the switching controls word by former control word, the signal attenuation that numerical-control attenuator 101 produces carries out corresponding switching, described switching may produce the overshoot signal, and attenuation is switched with the corresponding relation owing to the overshoot signal that described switching produced as shown in the table:
| Attenuation is switched (dB) | Former control word | The switching controls word | Overshoot signal (dB) |
| ??3.5-4 | ??000111 | ??001000 | ＜0.5dB is arranged |
| ??7.5-8 | ??001111 | ??010000 | ＜0.5dB is arranged |
| ??11.5-12 | ??010111 | ??011000 | ＜0.5dB is arranged |
| ??7-7.5 | ??001110 | ??001111 | ＜0.5dB is arranged |
| ??15.5-16 | ??011110 | ??100000 | 4dB is arranged |
| ??19.5-20 | ??100111 | ??101000 | ＜0.5dB is arranged |
| Attenuation is switched (dB) | Former control word | The switching controls word | Overshoot signal (dB) |
| ??23.5-24 | ??101111 | ??110000 | 1dB is arranged |
The overshoot signal that produces in handoff procedure can as transmitter, cause damage to signal receiver spare, so need the generation of the described overshoot signal of control.
Set forth the implementing procedure of the signal attenuation control method that the embodiment of the invention provides below in conjunction with Fig. 2.This method is used to suppress the generation of overshoot signal.
This method embodiment can effectively suppress the overshoot that produced by generated and sent the transition control word before send upgrading control word to control interface.
The implementing procedure of the another kind of signal attenuation control method that the embodiment of the invention that setting forth the embodiment of the invention below provides provides.
Transmitting element sends the renewal control word to memory cell and arithmetic element;
The renewal control word that described memory cell receives and the storage arithmetic element sends, the current control word of storage is sent to described arithmetic element,, after control interface sends the transition control word, described renewal control word is sent to control interface as current control word carry out signal attenuation in described arithmetic element with the control numerical-control attenuator;
Described arithmetic element is carried out exclusive disjunction to the current control word of described cell stores and from the renewal control word of described transmitting element, generate described transition control word, described transition control word is sent to described control interface carry out signal attenuation with the control numerical-control attenuator.
This method embodiment generated and sent the transition control word to reach when the control attenuation changes before sending described renewal control word under the situation that receives a plurality of renewal control words, effectively suppress the overshoot that is produced.
Set forth a kind of signal attenuation control device that the embodiment of the invention provides below in conjunction with Fig. 3, described device is used to suppress the generation of described overshoot signal.
Described control device comprises memory cell 302, arithmetic element 303 and transmitting element 301,
Described transmitting element 301 is used for sending the renewal control word to described memory cell 302 and described arithmetic element 303;
Described memory cell 302, be used to receive and store the renewal control word that described arithmetic element 303 sends, and the current control word that will store sends to described arithmetic element 303, and in described arithmetic element 303 after described control interface sends the transition control word, described renewal control word is sent to control interface as current control word carries out signal attenuation with the control numerical-control attenuator;
Described arithmetic element 303, be used for carrying out exclusive disjunction to the current control word of described memory cell 302 storages and from the renewal control word of described transmitting element 301, generate described transition control word, described transition control word is sent to described control interface carry out signal attenuation with the control numerical-control attenuator.
This device embodiment generated and sent the transition control word to reach when the control attenuation changes before sending described renewal control word under the situation that receives a plurality of renewal control words, effectively suppress the overshoot that is produced.
Set forth a kind of signal attenuation control system that the embodiment of the invention provides below in conjunction with Fig. 4, described system is used under the situation of the generation of the described overshoot signal of control signal being decayed.
Described signal attenuation system comprises numerical-control attenuator 401 and control interface 402, also comprise described signal attenuation control device 403 as above-mentioned embodiment, described signal attenuation control device 403 is used for sending current control word to described control interface 402 and carries out signal attenuation to control described numerical-control attenuator 401
Described signal attenuation control device 403 also is used for receiving the renewal control word, described current control word and described renewal control word are done exclusive disjunction generation transition control word, described transition control word is sent to described control interface 402 carry out signal attenuation to control described numerical-control attenuator 401;
Described signal attenuation control device 403 is used for that also described renewal control word is sent to described control interface 402 and carries out signal attenuation to control described numerical-control attenuator 401.
Native system embodiment generated and sent the transition control word to reach when the control attenuation changes before sending described renewal control word under the situation that receives a plurality of renewal control words, effectively suppress the overshoot that is produced.
Set forth a kind of multi-carrier signal attenuation control system that the embodiment of the invention provides below in conjunction with Fig. 5, described system is used under the situation of the generation of the described overshoot signal of control, subcarrier in the multicarrier is carried out signal attenuation respectively in order, described order can be according to frequency order from low to high, also can be according to frequency order from high to low.
Described multi-carrier signal attenuation control system comprises numerical-control attenuator 503, the control interface 501 consistent with the carrier wave number of phases, described control interface 501 links to each other with described numerical-control attenuator 503, also comprise the described signal attenuation control device 502 of the foregoing description consistent with the carrier wave number of phases, described control interface 501 of described signal attenuation control device 502 corresponding connections, described signal attenuation control device 502 sends control word to described control interface 501 and carries out signal attenuation to control described numerical-control attenuator 503, described signal attenuation control device 502 sends current control word according to order to the described control interface corresponding with it 501 and carries out signal attenuation to control 503 pairs of corresponding subcarriers of described numerical-control attenuator
Described signal attenuation control device 502 receives corresponding renewal control word according to described order, the current control word of the correspondence of described reception is done exclusive disjunction with described corresponding renewal control word, generate corresponding transition control word, the control interface 501 that described transition control word is sent to described correspondence according to described order carries out signal attenuation to control described numerical-control attenuator 503 according to described order.
Described signal attenuation control device 502 sends to described control interface according to described order with described renewal control word and carries out signal attenuation to control 503 pairs of corresponding subcarriers of described numerical-control attenuator.
Native system embodiment when can carrying out the decay of differential declines amount to a plurality of subcarriers, effectively suppresses the overshoot that is produced under the situation that receives a plurality of renewal control words.
" reception " speech among the foregoing invention embodiment can be understood as and initiatively obtains from other unit also can be to receive the information that other unit send.
The invention described above embodiment sequence number is not represented the quality of embodiment just to description.
The scheme of the content record of claim also is the protection range of the embodiment of the invention.
One of ordinary skill in the art will appreciate that all or part of processing in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a signal attenuation control method is characterized in that,
Current control word is sent to control interface carry out signal attenuation with the control numerical-control attenuator;
Receive and upgrade control word, described current control word and described renewal control word are done exclusive disjunction, generate the transition control word, described transition control word is sent to described control interface carry out signal attenuation to control described numerical-control attenuator;
Described renewal control word is sent to control interface carry out signal attenuation to control described numerical-control attenuator.
2. the method for claim 1 is characterized in that, describedly current control word is sent to described numerical-control attenuator further comprises:
Store described current control word, the current control word of described storage is used for calling when carrying out described computing.
3. the method for claim 1 is characterized in that, described renewal control word is sent to control interface carry out signal attenuation and further comprise to control described numerical-control attenuator:
Store described renewal control word, the renewal control word of described storage is used for receiving once more when control word is carried out signal attenuation to be called.
4. a signal attenuation control method is characterized in that,
Transmitting element sends the renewal control word to memory cell and arithmetic element;
The renewal control word that described memory cell receives and the storage arithmetic element sends, the current control word of storage is sent to described arithmetic element,, after control interface sends the transition control word, described renewal control word is sent to control interface as current control word carry out signal attenuation in described arithmetic element with the control numerical-control attenuator;
Described arithmetic element is carried out exclusive disjunction to the current control word of described cell stores and from the renewal control word of described transmitting element, generate described transition control word, described transition control word is sent to described control interface carry out signal attenuation with the control numerical-control attenuator.
5. a signal attenuation control device is characterized in that, described control device comprises memory cell, arithmetic element and transmitting element,
Described transmitting element is used for sending the renewal control word to described memory cell and described arithmetic element;
Described memory cell, be used to receive and store the renewal control word that described arithmetic element sends, and the current control word that will store sends to described arithmetic element, and in described arithmetic element after described control interface sends the transition control word, described renewal control word is sent to control interface as current control word carries out signal attenuation with the control numerical-control attenuator;
Described arithmetic element, be used for carrying out exclusive disjunction to the current control word of described cell stores and from the renewal control word of described transmitting element, generate described transition control word, described transition control word is sent to described control interface carry out signal attenuation with the control numerical-control attenuator.
6. signal attenuation system, comprise numerical-control attenuator and control interface, it is characterized in that, also comprise signal attenuation control device as claimed in claim 5, described signal attenuation control device links to each other with described control interface in the mode that can communicate by letter, controls described numerical-control attenuator by described control interface and carries out signal attenuation.
7. multi-carrier signal attenuation control system, comprise numerical-control attenuator, the control interface consistent with the carrier wave number of phases, described control interface links to each other with described numerical-control attenuator, it is characterized in that, also comprise the as claimed in claim 5 signal attenuation control device consistent with the carrier wave number of phases, corresponding described control interface of described damping controller also links to each other with described control interface, described signal attenuation control device sends control word in the mode that can communicate by letter to described control interface and carries out signal attenuation to control described numerical-control attenuator, described signal attenuation control device sends current control word according to order to the described control interface corresponding with it and to control described numerical-control attenuator corresponding subcarrier is carried out signal attenuation
Described signal attenuation control device receives corresponding renewal control word according to described order, the current control word of the correspondence of described reception is done exclusive disjunction with described corresponding renewal control word, generate corresponding transition control word, the control interface that described transition control word is sent to described correspondence according to described order carries out signal attenuation to control described numerical-control attenuator according to described order;
Described signal attenuation control device sends to described control interface according to described order with described renewal control word and to control described numerical-control attenuator corresponding subcarrier is carried out signal attenuation.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101054741A CN101807901B (en) | 2009-02-17 | 2009-02-17 | Method, device and system for controlling signal attenuation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101054741A CN101807901B (en) | 2009-02-17 | 2009-02-17 | Method, device and system for controlling signal attenuation |
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| CN101807901A true CN101807901A (en) | 2010-08-18 |
| CN101807901B CN101807901B (en) | 2012-08-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109714020A (en) * | 2019-02-22 | 2019-05-03 | 南京国博电子有限公司 | For controlling the circuit of numerical-control attenuator overshoot |
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| US4617676A (en) * | 1984-09-04 | 1986-10-14 | At&T Bell Laboratories | Predictive communication system filtering arrangement |
| KR100266902B1 (en) * | 1998-04-22 | 2000-09-15 | 윤종용 | Transmission line termination circuit of receipt and communication devices |
| JP2003218654A (en) * | 2002-01-17 | 2003-07-31 | Sharp Corp | High frequency power amplifier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109714020A (en) * | 2019-02-22 | 2019-05-03 | 南京国博电子有限公司 | For controlling the circuit of numerical-control attenuator overshoot |
| CN109714020B (en) * | 2019-02-22 | 2024-04-05 | 南京国博电子股份有限公司 | Circuit for controlling signal overshoot of numerical control attenuator |
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| CN101807901B (en) | 2012-08-15 |
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