CN111162782A - Direct current calibration method, system, device and storage medium - Google Patents
Direct current calibration method, system, device and storage medium Download PDFInfo
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Abstract
The invention relates to the technical field of multi-system digital repeaters, in particular to a direct current calibration method and a direct current calibration system, which are suitable for digital repeaters; the method comprises the following steps: according to a received first control signal and first channel indication information which indicate that a peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration, first feedback data fed back by a first target channel indicated by the first channel indication information are obtained; the first feedback data is set to be zero and sent to the digital predistortion module for digital predistortion processing, so that the effect of the digital predistortion module on digital predistortion is prevented from being influenced by direct current calibration operation of a peripheral digital-to-analog conversion device; and controlling the peripheral digital-to-analog conversion device to carry out direct current calibration according to the first control signal. The implementation of the invention can achieve the effect of ensuring the normal operation of the digital repeater.
Description
Technical Field
The invention relates to the technical field of multi-system digital repeaters, in particular to a direct current calibration method, a system, equipment and a storage medium.
Background
With the rapid development of mobile communication technology, the situation that communication services of different systems and different frequency bands such as 3G, 4G, 5G and the like coexist and cover commonly exists in the current mobile communication. Generally, in order to realize coexistence of multiple communication services, multiple communication services can be simultaneously accessed through multiple antenna channels of a digital repeater.
In practice, it is found that when a high-power digital repeater accessed with various communication services operates, a digital predistortion module and a direct current calibration technology are required to process feedback data of an antenna channel so as to ensure that the digital repeater operates normally; however, when the dc calibration technology is used to perform dc calibration on the peripheral digital-to-analog conversion device corresponding to the antenna channel, the feedback data of the antenna channel may fluctuate, which further affects the digital predistortion module to perform the digital predistortion function on the feedback data, and is not favorable for maintaining the normal operation of the digital repeater.
Disclosure of Invention
The present invention is directed to overcome the defect that the fluctuating feedback data affects the normal function of the digital predistortion module when the peripheral digital-to-analog conversion device performs the dc calibration in the prior art, and provides a dc calibration method, system, device and storage medium for preventing the predistortion function of the digital predistortion module from being affected during the dc calibration.
The technical scheme adopted by the invention is as follows: disclosed is a direct current calibration method suitable for a digital repeater, which is applied to the digital repeater, and comprises the following steps:
according to a received first control signal and first channel indication information which indicate that a peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration, first feedback data fed back by a first target channel indicated by the first channel indication information are obtained;
setting the first feedback data to zero and sending the first feedback data to a digital predistortion module;
and controlling the peripheral digital-to-analog conversion device to carry out direct current calibration according to the first control signal.
As an optional implementation, the method further comprises:
according to the received second control signal and second channel indication information which indicate that the peripheral digital-to-analog conversion device does not need to carry out direct current calibration, second feedback data fed back by a second target channel indicated by the second channel indication information are obtained;
and directly sending the second feedback data to the digital predistortion module for digital predistortion processing.
As an optional implementation manner, before the obtaining, according to the received first control signal and first channel indication information indicating that the peripheral digital-to-analog conversion device needs to perform the dc calibration, first feedback data fed back by a first target channel indicated by the first channel indication information, the method further includes:
monitoring whether the peripheral digital-to-analog conversion device needs to be subjected to direct current calibration or not through a monitoring unit;
if direct current calibration is needed, receiving the first control signal issued by the monitoring unit, and executing the step of acquiring first feedback data fed back by a first target channel indicated by first channel indication information according to the received first control signal and the first channel indication information indicating that the peripheral digital-to-analog conversion device needs to be subjected to direct current calibration;
and if the direct-current calibration is not required, receiving the second control signal issued by the monitoring unit, and executing the step of acquiring second feedback data fed back by a second target channel indicated by the second channel indication information according to the received second control signal and the second channel indication information which indicate that the peripheral digital-to-analog conversion device does not need the direct-current calibration.
As an optional implementation, the monitoring, by the monitoring unit, whether the peripheral digital-to-analog conversion device needs to be dc calibrated includes:
acquiring a direct current signal of the peripheral digital-to-analog converter through a monitoring unit, and judging whether the direct current signal fluctuates within a preset time length;
when the direct current signal is judged to fluctuate within the preset time length, determining that the peripheral digital-to-analog conversion device needs to be subjected to direct current calibration;
and when the direct current signal is judged not to fluctuate within the preset time, determining that the peripheral digital-to-analog conversion device does not need to carry out direct current calibration.
As an optional implementation manner, the acquiring, by a monitoring unit, a dc signal of the peripheral digital-to-analog converter, and determining whether the dc signal fluctuates within a preset time period includes:
acquiring the maximum value and the minimum value of a direct current signal of the peripheral digital-to-analog converter within a preset time length through a monitoring unit;
judging whether the difference value between the maximum value and the minimum value exceeds a preset threshold value through the monitoring unit;
when the difference value between the maximum value and the minimum value is judged to exceed a preset threshold value, determining that the direct current signal fluctuates;
and when the difference value between the maximum value and the minimum value is judged not to exceed a preset threshold value, determining that the direct current signal does not fluctuate.
The embodiment of the invention also discloses a direct current calibration system suitable for the digital repeater, which is applied to the digital repeater and comprises the following components:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring first feedback data fed back by a first target channel indicated by first channel indication information according to a received first control signal and the first channel indication information which indicate that a peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration;
the predistortion processing unit is used for setting the first feedback data to zero and sending the first feedback data to the digital predistortion module;
and the control unit is used for controlling the peripheral digital-to-analog conversion device to carry out direct current calibration according to the first control signal.
As an optional implementation manner, the obtaining unit is further configured to obtain, according to a received second control signal and second channel indication information that indicate that the peripheral digital-to-analog conversion device does not need to perform direct-current calibration, second feedback data fed back by a second target channel indicated by the second channel indication information;
and the predistortion processing unit is also used for directly sending the second feedback data to the digital predistortion module for digital predistortion processing.
As an optional implementation, the dc calibration system further includes:
the judging unit is used for monitoring whether the peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration or not through the monitoring unit before the acquiring unit acquires first feedback data fed back by a first target channel indicated by first channel indication information according to a received first control signal and the first channel indication information which indicate that the peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration;
the receiving unit is used for receiving the first control signal issued by the monitoring unit when the judging unit judges that the direct current calibration is required;
the obtaining unit is specifically configured to, after the receiving unit receives the first control signal sent by the monitoring unit, obtain first feedback data fed back by a first target channel indicated by first channel indication information according to the received first control signal and the received first channel indication information indicating that the peripheral digital-to-analog conversion device needs to perform direct-current calibration;
the receiving unit is further configured to receive the second control signal issued by the monitoring unit when the determining unit determines that the dc calibration is not required;
and the obtaining unit is specifically configured to, after the receiving unit receives the second control signal sent by the monitoring unit, obtain, according to the received second control signal and the second channel indication information indicating that the peripheral digital-to-analog conversion device does not need to perform the dc calibration, second feedback data fed back by the second target channel indicated by the second channel indication information.
As an optional implementation manner, the manner that the determining unit is configured to monitor whether the peripheral digital-to-analog conversion device needs to perform dc calibration through the monitoring unit specifically includes:
the judging unit is used for acquiring the direct current signal of the peripheral digital-to-analog converter through the monitoring unit and judging whether the direct current signal fluctuates within a preset time length; when the direct current signal is judged to fluctuate within the preset time length, determining that the peripheral digital-to-analog conversion device needs to be subjected to direct current calibration; and when the direct current signal is judged not to fluctuate within the preset time, determining that the peripheral digital-to-analog conversion device does not need to carry out direct current calibration.
As an optional implementation manner, the determining unit is configured to obtain the dc signal of the peripheral digital-to-analog converter through the monitoring unit, and determine whether the dc signal fluctuates within a preset time period specifically:
the judging unit is used for acquiring the maximum value and the minimum value of the direct current signal of the peripheral digital-to-analog converter within a preset time length through the monitoring unit; judging whether the difference value between the maximum value and the minimum value exceeds a preset threshold value through the monitoring unit; when the difference value between the maximum value and the minimum value is judged to exceed a preset threshold value, determining that the direct current signal fluctuates; and when the difference value between the maximum value and the minimum value is judged not to exceed a preset threshold value, determining that the direct current signal does not fluctuate.
A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the dc calibration method as described above.
A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the direct current calibration method as described above.
Compared with the prior art, the invention has the beneficial effects that:
according to the method and the system, first feedback data fed back by a first target channel indicated by first channel indication information can be acquired according to a received first control signal and the first channel indication information, wherein the first control signal and the first channel indication information indicate that a peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration; the first feedback data is set to be zero and sent to the digital predistortion module so as to prevent direct current calibration operation of a peripheral digital-to-analog conversion device from influencing the effect of the digital predistortion module in digital predistortion; and controlling the peripheral digital-to-analog conversion device to carry out direct current calibration according to the first control signal. That is to say, by implementing the embodiment of the present invention, the dc calibration system can preprocess the feedback data of the channel and send the preprocessed feedback data to the digital predistortion module and the peripheral device to control the peripheral device to perform dc calibration, so as to keep efficient and normal operation of the two functions, and prevent the predistortion function of the digital predistortion module from being affected during dc calibration, thereby achieving the effect of ensuring normal operation of the digital repeater.
Drawings
FIG. 1 is a schematic flowchart of a DC calibration method for a digital repeater according to the present disclosure;
FIG. 2 is a schematic flowchart of another DC calibration method for a digital repeater according to the present disclosure;
FIG. 3 is a schematic structural diagram of a DC calibration system suitable for a digital repeater according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a system structure for assisting in explaining a DC calibration method applied to a digital repeater according to an embodiment of the present invention;
FIG. 5 is a schematic flowchart of another DC calibration method for a digital repeater according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another DC calibration system suitable for a digital repeater according to an embodiment of the present invention.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Example 1
As shown in fig. 1, fig. 1 is a schematic flow chart of a dc calibration method disclosed in this embodiment. The direct current calibration method can be applied to a direct current calibration system suitable for a digital repeater, and the direct current calibration system at least comprises the following steps: the device comprises a monitoring unit, a feedback signal control unit, a digital predistortion module and a peripheral digital-to-analog conversion device; the direct current calibration method can comprise the following steps:
101. the monitoring unit monitors whether the peripheral digital-to-analog conversion device needs to carry out direct current calibration or not.
In the embodiment of the present invention, the monitoring Unit may be a Micro Controller Unit (MCU), which is a microcomputer that appropriately reduces the frequency and specification of the central processing Unit, integrates the memory, the counter, and the data transmission interfaces into a single chip, has a certain logic calculation capability, and can monitor whether the peripheral digital-to-analog converter needs to be dc calibrated through the monitoring Unit.
It should be noted that: the peripheral digital-to-analog converter may be a device that converts a digital quantity to an analog quantity. The dc calibration is a technique for controlling the dc signal of the peripheral dac, and can effectively calibrate the dc signal when the dc signal of the peripheral dac fluctuates, so as to maintain stable operation of the digital repeater.
As an optional implementation, the manner of monitoring, by the monitoring unit, whether the peripheral digital-to-analog conversion device needs to perform dc calibration may be: the monitoring unit acquires a direct current signal of the peripheral digital-to-analog converter and judges whether the direct current signal of the peripheral digital-to-analog converter fluctuates within a preset time length; if the monitoring unit judges that the direct current signal of the peripheral digital-to-analog conversion device fluctuates within the preset time length, determining that the peripheral digital-to-analog conversion device needs to be subjected to direct current calibration; and if the monitoring unit judges that the direct current signal of the peripheral digital-to-analog conversion device does not fluctuate within the preset time, determining that the peripheral digital-to-analog conversion device does not need direct current calibration.
It should be noted that: the monitoring unit can be internally provided with a data acquisition module which can acquire direct current signals of the peripheral digital-to-analog conversion device, and then the monitoring unit can judge whether the direct current signals of the peripheral digital-to-analog conversion device fluctuate within preset time according to the acquired direct current signals and the logic calculation function of the monitoring unit. And can issue the control signal to carry out the direct current calibration when the direct current signal of the peripheral digital-to-analog conversion device fluctuates; otherwise, a control signal which does not need to execute the direct current calibration is issued.
It needs to be further explained that: the preset time duration may be set by a developer according to a large amount of development data, and the embodiment of the present invention is not limited.
By implementing the method, a method for judging whether the peripheral digital-to-analog conversion device needs to perform direct current calibration is expanded, whether the peripheral digital-to-analog conversion device needs to perform direct current calibration can be judged by simply acquiring the direct current signal of the peripheral digital-to-analog conversion device and judging whether the direct current signal fluctuates, and the direct current signal of the peripheral digital-to-analog conversion device is easy to acquire, so that the judgment difficulty for judging whether the peripheral digital-to-analog conversion device needs to perform direct current calibration is reduced.
As another optional implementation, the manner in which the monitoring unit obtains the dc signal of the peripheral digital-to-analog converter and determines whether the dc signal of the peripheral digital-to-analog converter fluctuates within a preset time period may be: the monitoring unit acquires the maximum value and the minimum value of a direct current signal of a peripheral digital-to-analog converter within a preset time length; the monitoring unit judges whether the maximum value and the minimum value of the direct current signal in a preset time length exceed a preset threshold value or not; when the monitoring unit judges that the difference value of the maximum value and the minimum value of the direct current signal exceeds a preset threshold value, the monitoring unit determines that the direct current signal fluctuates; and when the monitoring unit judges that the difference value of the maximum value and the minimum value of the direct current signal does not exceed a preset threshold value, determining that the direct current signal does not fluctuate.
It should be noted that: after the data acquisition module arranged in the monitoring unit acquires a plurality of direct current signals within the preset time length, the maximum value and the minimum value in the plurality of direct current signals can be further screened out, and then whether the direct current signals fluctuate or not can be judged by calculating whether the difference value of the maximum value and the minimum value of the direct current signals within the preset time length exceeds a preset threshold value, so that the direct current signals are prevented from using direct current calibration operation only when fluctuation in a small range occurs, and the power consumption of the system can be reduced.
It needs to be further explained that: the preset threshold may be set by a developer according to a large amount of development data, and the embodiment of the present invention is not limited.
By implementing the method, a method for judging whether the direct current signal of the peripheral digital-to-analog conversion device fluctuates within the preset time length is expanded, the direct current calibration operation can be avoided when the direct current signal fluctuates only in a small range, and the power consumption of the system can be reduced.
102. When monitoring that the peripheral digital-to-analog conversion device needs to perform direct current calibration, the monitoring unit sends a first control signal to the feedback signal control unit.
In the embodiment of the invention, when monitoring that a peripheral digital-to-analog conversion device needs to be subjected to direct current calibration, a monitoring unit can send a first control signal to a feedback signal control unit through a connecting device between the monitoring unit and the feedback signal control unit; the first control signal may be a high level, and when the feedback signal control unit receives the high level, it is determined that the peripheral digital-to-analog conversion device needs to perform a dc calibration operation.
In this embodiment, the feedback signal control unit may be an electronic control unit in the dc calibration system applicable to the multichannel digital repeater disclosed in this embodiment, and may be configured to receive a signal sent by the monitoring unit to determine whether the peripheral digital-to-analog conversion device needs to perform dc calibration, and further may obtain feedback data fed back by the peripheral channel in a time-sharing manner and send the feedback data to the digital predistortion module for digital predistortion processing according to whether the peripheral digital-to-analog conversion device needs to perform dc calibration, and may send an execution signal for executing dc calibration to the peripheral digital-to-analog conversion device when it is determined that the peripheral digital-to-analog conversion device needs to perform dc calibration according to the control signal sent by the monitoring unit, so that the peripheral digital-to-analog conversion device executes dc calibration operation.
103. The feedback signal control unit acquires first channel indication information sent by the digital predistortion module according to the first control signal so as to acquire feedback data fed back by a first target channel indicated by the first channel indication information.
In the embodiment of the invention, when determining that a peripheral digital-to-analog conversion device needs to perform direct current calibration according to a received first control signal, a feedback signal control unit can acquire first channel indication information sent by a digital predistortion module; it should be noted that: in order to access multiple communication services simultaneously, the digital repeater is provided with a plurality of antenna channels, and the direct current calibration and the digital predistortion of each antenna channel are independent, so that the first channel indication information sent by the digital predistortion module can include information of a first target channel to be subjected to digital predistortion, and then the feedback signal control unit can determine the first target channel from the plurality of antenna channels of the digital repeater according to the information of the first target channel and acquire feedback data fed back by the first target channel.
In the embodiment of the present invention, the digital predistortion module may be an electronic control module included in a dc calibration system disclosed in the embodiment of the present invention, and is configured to perform a digital predistortion function; the digital predistortion function may perform corresponding compensation on a feedback signal fed back by a channel, so that the feedback signal is maintained stable, which may be a specific application of a radio frequency power amplifier linearization technique.
104. The feedback signal control unit sets the feedback data to zero and sends the feedback data to the digital predistortion module so as to prevent the direct current calibration operation of the peripheral digital-to-analog conversion device from influencing the effect of the digital predistortion module on digital predistortion.
In practice, it is found that, when a conventional digital repeater operates, a temperature may generate a large change to affect a direct current signal of a peripheral digital-to-analog conversion device, and further, the peripheral digital-to-analog conversion device needs to perform direct current calibration to stabilize the direct current signal of the peripheral digital-to-analog conversion device, but when the peripheral digital-to-analog conversion device performs direct current calibration, feedback data of a channel may fluctuate, and further, the digital predistortion module is affected to perform a digital predistortion function on the feedback data.
It can be seen that, the method for implementing the dc calibration method described in fig. 1 is applicable to a digital repeater, and a monitoring unit included in a dc calibration system implementing the dc calibration method can call a feedback signal control unit included in the system to obtain channel indication information sent by a digital predistortion module when it is monitored that a peripheral digital-to-analog conversion device needs to perform dc calibration, and obtain feedback data fed back by a corresponding target channel according to the channel indication information; furthermore, the feedback signal control unit can set the obtained feedback data to zero and send the obtained feedback data to the digital predistortion module, so as to prevent the feedback data fed back by the target channel from fluctuating due to the direct current calibration operation of the peripheral digital-to-analog conversion device, and further influence the effect of the digital predistortion module on digital predistortion. That is to say, by implementing the embodiment of the present invention, the dc calibration system can preprocess the feedback data of the channel and send the preprocessed feedback data to the digital predistortion module and the peripheral device to control the peripheral device to perform dc calibration, so as to keep efficient and normal operation of the two functions, and prevent the predistortion function of the digital predistortion module from being affected during dc calibration, thereby achieving the effect of ensuring normal operation of the digital repeater.
Example 2
As shown in fig. 2, fig. 2 is a schematic flowchart of another dc calibration method suitable for a digital repeater according to this embodiment. The direct current calibration method can be applied to a direct current calibration system suitable for a digital repeater, and the direct current calibration system at least comprises the following steps: the device comprises a monitoring unit, a feedback signal control unit, a digital predistortion module and a peripheral digital-to-analog conversion device; the direct current calibration method can comprise the following steps:
201. the monitoring unit monitors whether the peripheral digital-to-analog conversion device needs to carry out direct current calibration or not.
202. When monitoring that the peripheral digital-to-analog conversion device needs to perform direct current calibration, the monitoring unit sends a first control signal to the feedback signal control unit.
As an optional implementation manner, when the monitoring unit monitors that the peripheral digital-to-analog conversion device does not need to perform direct-current calibration, the monitoring unit may further send a second control signal to the feedback signal control unit; the feedback signal control unit can acquire second channel indication information sent by the digital predistortion module according to the second control signal so as to acquire feedback data fed back by a second target channel indicated by the second channel indication information; and the feedback signal control unit can also directly send feedback data fed back by the second target channel to the digital predistortion module for digital predistortion processing.
It should be noted that the second control signal may be a low level, and when the feedback signal control unit receives the low level, it is determined that the peripheral digital-to-analog conversion device does not need to perform the dc calibration operation.
It needs to be further explained that: the peripheral digital-to-analog conversion device does not need to carry out direct current calibration operation, so that the feedback data of the antenna channel does not fluctuate, and the feedback signal control unit can also directly send the feedback data fed back by the second target channel to the digital predistortion module for digital predistortion processing without carrying out zero setting operation on the feedback data fed back by the second target channel.
By implementing the method, when the monitoring unit monitors that the peripheral digital-to-analog conversion device does not need to perform direct-current calibration, the feedback data of the channel can be directly sent to the digital predistortion module for data predistortion processing, so that the zero setting operation of the feedback data of the channel can be saved, and the power consumption of a direct-current calibration system is reduced.
203. The feedback signal control unit acquires first channel indication information sent by the digital predistortion module according to the first control signal so as to acquire feedback data fed back by a first target channel indicated by the first channel indication information.
204. The feedback signal control unit sets the feedback data to zero and sends the feedback data to the digital predistortion module so as to prevent the direct current calibration operation of the peripheral digital-to-analog conversion device from influencing the effect of the digital predistortion module on digital predistortion.
205. The feedback signal control unit sends an execution signal for executing the direct current calibration to the peripheral digital-to-analog conversion device according to the received first channel indication information, wherein the execution signal is an execution signal for executing the direct current calibration aiming at a first target channel indicated by the first channel indication information.
In the embodiment of the present invention, after determining that the peripheral digital-to-analog conversion device needs to perform dc calibration according to the first control signal sent by the monitoring unit, the feedback signal control unit may determine a first target channel in the plurality of antenna channels of the digital repeater according to information of the first target channel sent by the digital predistortion module, and send an execution signal for performing dc calibration to the peripheral digital-to-analog conversion device corresponding to the first target channel, so as to perform dc calibration for the first target channel indicated by the first channel indication information.
206. And the peripheral digital-to-analog conversion device executes direct-current calibration operation on the first target channel according to the execution signal.
In the embodiment of the present invention, after receiving the execution signal, the peripheral digital-to-analog conversion device may perform a dc calibration operation on the first target channel indicated by the execution signal, so as to maintain the stability of the dc signal of the first target channel.
It should be noted that: the digital repeater has a plurality of antenna channels, and further after the peripheral digital-to-analog conversion device performs the direct current calibration operation on a first target channel in the plurality of antenna channels, the feedback signal control unit can acquire channel instructions for performing the direct current calibration and the digital predistortion on other antenna channels, which are issued by the digital predistortion module, so that the direct current calibration system suitable for the digital repeater sequentially performs the direct current calibration and the digital predistortion on the plurality of antenna channels of the digital repeater, and further, the stable operation of the whole digital repeater is maintained.
It can be seen that, compared with the implementation of the dc calibration method for a digital repeater described in fig. 1, the implementation of the dc calibration method for a digital repeater described in fig. 2 can also control the dc calibration of the dc signal of the channel by the peripheral digital-to-analog converter through the feedback signal control unit after the digital predistortion module performs predistortion processing on the feedback data of the channel when the monitoring unit monitors that the peripheral digital-to-analog converter needs to perform dc calibration, so that the dc calibration of the digital predistortion module and the peripheral digital-to-analog converter can perform cooperative processing on the feedback data of the channel to maintain stable operation of the digital repeater.
Example 3
As shown in fig. 3, fig. 3 is a schematic structural diagram of a dc calibration system suitable for a digital repeater according to an embodiment of the present invention, where the dc calibration system at least includes: the system comprises a monitoring unit 301, a feedback signal control unit 302, a digital predistortion module 303 and a peripheral digital-to-analog conversion device 304; wherein:
a monitoring unit 301, configured to monitor whether the peripheral digital-to-analog conversion device 304 needs to perform dc calibration;
the monitoring unit 301 is further configured to send a first control signal to the feedback signal control unit 302 when it is monitored that the peripheral digital-to-analog conversion device 304 needs to perform dc calibration;
a feedback signal control unit 302, configured to obtain, according to a first control signal, first channel indication information sent by the digital predistortion module 303, so as to obtain feedback data fed back by a first target channel indicated by the first channel indication information;
the feedback signal control unit 302 is further configured to set the feedback data to zero and send the feedback data to the digital predistortion module 303 for digital predistortion processing, so as to prevent the dc calibration operation of the peripheral digital-to-analog conversion device 304 from affecting the effect of digital predistortion performed by the digital predistortion module 303.
It can be seen that, with the implementation of the dc calibration system suitable for the digital repeater described in fig. 3, when it is monitored that the peripheral digital-to-analog conversion device needs to perform dc calibration, the monitoring unit included in the dc calibration system may call the feedback signal control unit included in the system to obtain the channel indication information sent by the digital predistortion module, and obtain the feedback data fed back by the corresponding target channel according to the channel indication information; furthermore, the feedback signal control unit can set the obtained feedback data to zero and send the obtained feedback data to the digital predistortion module for digital predistortion processing, so that the feedback data fed back by the target channel is prevented from fluctuating due to direct current calibration operation of a peripheral digital-to-analog conversion device, and the effect of the digital predistortion module on digital predistortion is further influenced. That is to say, by implementing the embodiment of the present invention, the dc calibration system can preprocess the feedback data of the channel and send the preprocessed feedback data to the digital predistortion module and the peripheral device to control the peripheral device to perform dc calibration, so as to keep efficient and normal operation of the two functions, and prevent the predistortion function of the digital predistortion module from being affected during dc calibration, thereby achieving the effect of ensuring normal operation of the digital repeater.
Example 4
As shown in fig. 3, fig. 3 is a schematic structural diagram of a dc calibration system suitable for a digital repeater according to an embodiment of the present invention, where the dc calibration system at least includes: the system comprises a monitoring unit 301, a feedback signal control unit 302, a digital predistortion module 303 and a peripheral digital-to-analog conversion device 304; wherein:
the monitoring unit 301 is further configured to send a second control signal to the feedback signal control unit 302 when it is monitored that the peripheral digital-to-analog conversion device 304 does not need to perform dc calibration;
the feedback signal control unit 302 is further configured to obtain, according to the second control signal, second channel indication information sent by the digital predistortion module 303, so as to obtain feedback data fed back by a second target channel indicated by the second channel indication information;
the feedback signal control unit 302 is further configured to directly send feedback data fed back by the second target channel to the digital predistortion module 303 for digital predistortion processing.
As an optional implementation manner, the feedback signal control unit 302 included in the dc calibration system suitable for a digital repeater shown in fig. 3 is further configured to, after the feedback signal control unit 302 sets the feedback data to zero and sends the feedback data to the digital predistortion module 303 for digital predistortion processing, send an execution signal for performing dc calibration to the peripheral digital-to-analog conversion device 304 according to the received first channel indication information, where the execution signal is an execution signal for performing dc calibration with respect to the first target channel indicated by the first channel indication information;
and a peripheral digital-to-analog conversion device 304, configured to perform a dc calibration operation on the first target channel according to the execution signal.
By implementing the method, when the monitoring unit monitors that the peripheral digital-to-analog conversion device needs to perform direct current calibration, after the feedback data of the channel is subjected to predistortion processing by the digital predistortion module, the direct current calibration of the direct current signal of the channel by the peripheral digital-to-analog converter is controlled by the feedback signal control unit, so that the direct current calibration of the digital predistortion module and the peripheral digital-to-analog conversion device can perform cooperative processing on the feedback data of the channel to keep the stable operation of the digital repeater.
As an optional implementation, the manner of monitoring whether the peripheral digital-to-analog conversion device 304 needs to perform dc calibration by the monitoring unit 301 may specifically be:
the monitoring unit 301 is configured to obtain a dc signal of the peripheral digital-to-analog converter 304, and determine whether the dc signal fluctuates within a preset time period; when the direct current signal is judged to fluctuate within the preset time length, it is determined that the peripheral digital-to-analog conversion device 304 needs to perform direct current calibration; and when it is determined that the dc signal does not fluctuate within the preset time period, determining that the peripheral digital-to-analog conversion device 304 does not need to perform dc calibration.
By implementing the method, a method for judging whether the peripheral digital-to-analog conversion device needs to perform direct current calibration is expanded, whether the peripheral digital-to-analog conversion device needs to perform direct current calibration can be judged by simply acquiring the direct current signal of the peripheral digital-to-analog conversion device and judging whether the direct current signal fluctuates, and the direct current signal of the peripheral digital-to-analog conversion device is easy to acquire, so that the judgment difficulty for judging whether the peripheral digital-to-analog conversion device needs to perform direct current calibration is reduced.
As an optional implementation manner, the manner that the monitoring unit 301 is configured to obtain the dc signal of the peripheral digital-to-analog converter 304 and determine whether the dc signal fluctuates within a preset time period may specifically be:
the monitoring unit 301 is configured to obtain a maximum value and a minimum value of a dc signal of the peripheral digital-to-analog converter 304 within a preset time duration; judging whether the difference value of the maximum value and the minimum value exceeds a preset threshold value or not; when the difference value between the maximum value and the minimum value is judged to exceed a preset threshold value, determining that the direct current signal fluctuates; and when the difference value between the maximum value and the minimum value is judged not to exceed the preset threshold value, determining that the direct current signal does not fluctuate.
By implementing the method, a method for judging whether the direct current signal of the peripheral digital-to-analog conversion device fluctuates within the preset time length is expanded, the direct current calibration operation can be avoided when the direct current signal fluctuates only in a small range, and the power consumption of the system can be reduced.
It can be seen that, by implementing the dc calibration system suitable for the digital repeater shown in fig. 3, when the monitoring unit monitors that the peripheral digital-to-analog conversion device does not need to perform dc calibration, the feedback data of the channel can be directly sent to the digital predistortion module for data predistortion processing, so that the zeroing operation on the feedback data of the channel can be saved, and the power consumption of the dc calibration system is reduced.
Example 5
In order to better illustrate the working flow of the dc calibration method for a digital repeater disclosed in the embodiment of the present invention, the following description is made with reference to fig. 4, where fig. 4 is a schematic diagram of a system structure of the dc calibration method for a digital repeater disclosed in the embodiment of the present invention; as shown in fig. 4:
when monitoring that a direct current signal fed back by a peripheral digital-to-analog conversion device may change, a Micro Control Unit (MCU) may write a control signal 2 into a high level and send the high level to a feedback signal control Unit included in a Field Programmable Gate Array (FPGA) Unit; otherwise, the control signal 2 is written to a low level and sent to the feedback signal control unit. Further, when the feedback signal control unit receives the high-level control signal 2, the feedback signal control unit may obtain, in combination with the received control signal 2, a channel indication signal sent by a multi-channel digital predistortion unit included in a Field Programmable Gate Array (FPGA) unit, and set the feedback data of the power amplifier unit of the corresponding channel to zero and send the data to the multi-channel digital predistortion unit for digital predistortion according to the channel indication signal, so as to prevent the direct current calibration to be performed from affecting the digital predistortion function of the multi-channel digital predistortion unit; on the contrary, if the feedback signal control unit receives the low-level control signal 2, the feedback data fed back by the power amplifier unit of the corresponding channel can be directly sent to the multi-channel digital predistortion unit for digital predistortion operation according to the channel indication signal sent by the multi-channel digital predistortion unit; after the digital predistortion operation is completed, further, the feedback signal control unit may also send a control signal 1 to the peripheral digital-to-analog conversion device of the channel indicated by the channel indication signal, so that the corresponding peripheral digital-to-analog conversion device performs the dc calibration operation. Obviously, in the embodiment of the present invention, the digital repeater has multiple channels, so after the dc calibration operation is performed on a certain channel (for example, channel 1 in fig. 4), the dc calibration system may sequentially perform the above-mentioned dc calibration operation on other channels (it should be noted that other channels also include the peripheral digital-to-analog conversion device and the power amplifier unit) to maintain the normal operation of the digital repeater.
Example 6
Referring to fig. 5, fig. 5 is a schematic flowchart of another dc calibration method for a digital repeater according to an embodiment of the present invention. As shown in fig. 5, the dc calibration method for a digital repeater may include the following steps:
501. according to the received first control signal and the first channel indication information which indicate that the peripheral digital-to-analog conversion device needs to carry out direct current calibration, first feedback data fed back by a first target channel indicated by the first channel indication information are obtained.
In the embodiment of the present invention, an execution main body for executing the dc calibration method of the digital repeater may be a dc calibration system suitable for the digital repeater disclosed in the embodiment of the present invention, or may be other control systems or control devices.
As an optional implementation manner, after first feedback data fed back by a first target channel indicated by first channel indication information is obtained according to a received first control signal and the first channel indication information indicating that the peripheral digital-to-analog conversion device needs to perform the dc calibration, whether the peripheral digital-to-analog conversion device needs to perform the dc calibration may be monitored by a monitoring unit, and when the dc calibration is needed, the first control signal sent by the monitoring unit is received, and first feedback data fed back by the first target channel indicated by the first channel indication information is obtained according to the received first control signal and the first channel indication information indicating that the peripheral digital-to-analog conversion device needs to perform the dc calibration.
It should be noted that: the monitoring Unit may be a Micro Controller Unit (MCU), which is a microcomputer that appropriately reduces the frequency and specification of the cpu, integrates the memory, the counter, and a plurality of data transmission interfaces on a single chip, has certain logic calculation capability, and can monitor whether the peripheral dac needs dc calibration through the monitoring Unit.
By implementing the method, whether the peripheral digital-to-analog conversion device of the digital repeater carries out direct current calibration or not can be monitored in real time through the monitoring unit, and when the fact that the peripheral digital-to-analog conversion device needs to carry out direct current calibration is monitored, subsequent countermeasures can be taken in time to keep the normal operation of the digital repeater.
As an optional implementation manner, the manner of monitoring whether the peripheral digital-to-analog conversion device needs to be subjected to dc calibration by the monitoring unit may be: acquiring a direct current signal of a peripheral digital-to-analog converter through a monitoring unit, and judging whether the direct current signal fluctuates within a preset time length; when the direct current signal is judged to fluctuate within the preset time length, determining that a peripheral digital-to-analog conversion device needs to be subjected to direct current calibration; and when the direct current signal is judged not to fluctuate within the preset time, determining that the peripheral digital-to-analog conversion device does not need to carry out direct current calibration.
It should be noted that: the preset time duration may be set by a developer according to a large amount of development data, and the embodiment of the present invention is not limited.
By implementing the method, a method for judging whether the peripheral digital-to-analog conversion device needs to perform direct current calibration is expanded, whether the peripheral digital-to-analog conversion device needs to perform direct current calibration can be judged by simply acquiring the direct current signal of the peripheral digital-to-analog conversion device and judging whether the direct current signal fluctuates, and the direct current signal of the peripheral digital-to-analog conversion device is easy to acquire, so that the judgment difficulty for judging whether the peripheral digital-to-analog conversion device needs to perform direct current calibration is reduced.
As another optional implementation, the manner of acquiring the dc signal of the peripheral digital-to-analog converter through the monitoring unit and determining whether the dc signal fluctuates within a preset time period may be: acquiring the maximum value and the minimum value of a direct current signal of a peripheral digital-to-analog converter in a preset time length through a monitoring unit; judging whether the difference value of the maximum value and the minimum value exceeds a preset threshold value through a monitoring unit; when the difference value between the maximum value and the minimum value is judged to exceed a preset threshold value, determining that the direct current signal fluctuates; and when the difference value between the maximum value and the minimum value is judged not to exceed the preset threshold value, determining that the direct current signal does not fluctuate.
It should be noted that: the preset threshold may be set by a developer according to a large amount of development data, and the embodiment of the present invention is not limited.
By implementing the method, a method for judging whether the direct current signal of the peripheral digital-to-analog conversion device fluctuates within the preset time length is expanded, the direct current calibration operation can be avoided when the direct current signal fluctuates only in a small range, and the power consumption of the system can be reduced.
502. And zeroing the first feedback data and sending the first feedback data to the digital predistortion module for digital predistortion treatment so as to prevent the direct current calibration operation of the peripheral digital-to-analog conversion device from influencing the effect of the digital predistortion treatment of the digital predistortion module.
As an optional implementation manner, the direct current calibration system may further obtain, according to a received second control signal and second channel indication information indicating that the peripheral digital-to-analog conversion device does not need to perform direct current calibration, second feedback data fed back by a second target channel indicated by the second channel indication information; and directly sending the second feedback data to a digital predistortion module for digital predistortion processing.
It should be noted that: the peripheral digital-to-analog conversion device does not need to carry out direct current calibration operation, so that the feedback data of the antenna channel does not fluctuate, and the feedback signal control unit can also directly send the feedback data fed back by the second target channel to the digital predistortion module for digital predistortion processing without carrying out zero setting operation on the feedback data fed back by the second target channel.
By implementing the method, when the monitoring unit monitors that the peripheral digital-to-analog conversion device does not need to perform direct-current calibration, the feedback data of the channel can be directly sent to the digital predistortion module for data predistortion processing, so that the zero setting operation of the feedback data of the channel can be saved, and the power consumption of a direct-current calibration system is reduced.
503. And controlling the peripheral digital-to-analog conversion device to carry out direct current calibration according to the first control signal.
In the embodiment of the invention, the peripheral digital-to-analog converter can be a device for converting digital quantity into analog quantity. The dc calibration is a technique for controlling the dc signal of the peripheral dac, and can effectively calibrate the dc signal when the dc signal of the peripheral dac fluctuates, so as to maintain stable operation of the digital repeater.
It can be seen that, by implementing the dc calibration method applicable to the digital repeater described in fig. 5, the feedback data of the channel can be preprocessed and sent to the digital predistortion module and the peripheral device to control the peripheral device to perform dc calibration, so as to keep the two functions capable of operating normally with high efficiency, and prevent the predistortion function of the digital predistortion module from being affected during dc calibration, thereby achieving the effect of ensuring the normal operation of the digital repeater.
Example 7
Referring to fig. 6, fig. 6 is a schematic structural diagram of another dc calibration system suitable for a digital repeater according to an embodiment of the present invention. As shown in fig. 6, the dc calibration system may include:
an obtaining unit 601, configured to obtain, according to a received first control signal and first channel indication information indicating that a peripheral digital-to-analog conversion device needs to perform direct-current calibration, first feedback data fed back by a first target channel indicated by the first channel indication information;
the predistortion processing unit 602 is configured to set the first feedback data to zero and send the first feedback data to the digital predistortion module, so as to prevent a dc calibration operation of a peripheral digital-to-analog conversion device from affecting an effect of digital predistortion performed by the digital predistortion module;
and a control unit 603, configured to control the peripheral digital-to-analog conversion device to perform dc calibration according to the first control signal.
As an optional implementation manner, the obtaining unit 601 is further configured to obtain, according to the received second control signal and the second channel indication information, that the peripheral digital-to-analog conversion device does not need to perform direct-current calibration, second feedback data fed back by a second target channel indicated by the second channel indication information;
the predistortion processing unit 602 is further configured to directly send the second feedback data to the digital predistortion module for digital predistortion processing.
As an optional implementation, the dc calibration system may further include the following units not shown in the drawings:
the determining unit is configured to monitor, by the monitoring unit, whether the peripheral digital-to-analog conversion device needs to perform dc calibration before the obtaining unit 601 obtains first feedback data fed back by a first target channel indicated by first channel indication information according to the received first control signal and the first channel indication information, which indicate that the peripheral digital-to-analog conversion device needs to perform dc calibration;
the receiving unit is used for receiving a first control signal sent by the monitoring unit when the judging unit judges that the direct current calibration is required;
the obtaining unit 601 is specifically configured to, after the receiving unit receives the first control signal sent by the monitoring unit, obtain first feedback data fed back by a first target channel indicated by the first channel indication information according to the received first control signal and the received first channel indication information indicating that the peripheral digital-to-analog conversion device needs to perform direct-current calibration;
the receiving unit is also used for receiving a second control signal sent by the monitoring unit when the judging unit judges that the direct current calibration is not needed;
the obtaining unit 601 is further specifically configured to, after the receiving unit receives the second control signal sent by the monitoring unit, obtain, according to the received second control signal and the second channel indication information indicating that the peripheral digital-to-analog conversion device does not need to perform the dc calibration, second feedback data fed back by the second target channel indicated by the second channel indication information.
By implementing the method, whether the peripheral digital-to-analog conversion device of the digital repeater carries out direct current calibration or not can be monitored in real time through the monitoring unit, and when the fact that the peripheral digital-to-analog conversion device needs to carry out direct current calibration is monitored, subsequent countermeasures can be taken in time to keep the normal operation of the digital repeater.
As an optional implementation manner, the manner that the determining unit is used for monitoring whether the peripheral digital-to-analog conversion device needs to perform dc calibration through the monitoring unit may specifically be:
the judging unit is used for acquiring the direct current signal of the peripheral digital-to-analog converter through the monitoring unit and judging whether the direct current signal fluctuates within a preset time length; when the direct current signal is judged to fluctuate within the preset time length, determining that a peripheral digital-to-analog conversion device needs to be subjected to direct current calibration; and when the direct current signal is judged not to fluctuate within the preset time, determining that the peripheral digital-to-analog conversion device does not need to carry out direct current calibration.
By implementing the method, a method for judging whether the peripheral digital-to-analog conversion device needs to perform direct current calibration is expanded, whether the peripheral digital-to-analog conversion device needs to perform direct current calibration can be judged by simply acquiring the direct current signal of the peripheral digital-to-analog conversion device and judging whether the direct current signal fluctuates, and the direct current signal of the peripheral digital-to-analog conversion device is easy to acquire, so that the judgment difficulty for judging whether the peripheral digital-to-analog conversion device needs to perform direct current calibration is reduced.
As another optional implementation, the manner that the determining unit is configured to obtain the dc signal of the peripheral digital-to-analog converter through the monitoring unit, and determine whether the dc signal fluctuates within a preset time period may specifically be:
the judging unit is used for acquiring the maximum value and the minimum value of the direct current signal of the peripheral digital-to-analog converter within the preset time length through the monitoring unit; judging whether the difference value of the maximum value and the minimum value exceeds a preset threshold value through a monitoring unit; when the difference value between the maximum value and the minimum value is judged to exceed a preset threshold value, determining that the direct current signal fluctuates; and when the difference value between the maximum value and the minimum value is judged not to exceed the preset threshold value, determining that the direct current signal does not fluctuate.
By implementing the method, a method for judging whether the direct current signal of the peripheral digital-to-analog conversion device fluctuates within the preset time length is expanded, the direct current calibration operation can be avoided when the direct current signal fluctuates only in a small range, and the power consumption of the system can be reduced.
It can be seen that, by implementing the dc calibration system suitable for the digital repeater shown in fig. 6, the feedback data of the channel can be preprocessed and sent to the digital predistortion module and the peripheral device to control the peripheral device to perform dc calibration, so as to keep the two functions capable of operating normally with high efficiency, and prevent the predistortion function of the digital predistortion module from being affected during dc calibration, thereby achieving the effect of ensuring the normal operation of the digital repeater.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (12)
1. A direct current calibration method is applied to a digital repeater, and comprises the following steps:
according to a received first control signal and first channel indication information which indicate that a peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration, first feedback data fed back by a first target channel indicated by the first channel indication information are obtained;
setting the first feedback data to zero and sending the first feedback data to a digital predistortion module;
and controlling the peripheral digital-to-analog conversion device to carry out direct current calibration according to the first control signal.
2. The direct current calibration method according to claim 1, further comprising:
according to the received second control signal and second channel indication information which indicate that the peripheral digital-to-analog conversion device does not need to carry out direct current calibration, second feedback data fed back by a second target channel indicated by the second channel indication information are obtained;
and directly sending the second feedback data to the digital predistortion module for digital predistortion processing.
3. The dc calibration method according to claim 2, wherein before the obtaining, according to the received first control signal and the first channel indication information indicating that the peripheral digital-to-analog conversion device needs to perform the dc calibration, the first feedback data fed back by the first target channel indicated by the first channel indication information, the method further comprises:
monitoring whether the peripheral digital-to-analog conversion device needs to be subjected to direct current calibration or not through a monitoring unit;
if direct current calibration is needed, receiving the first control signal issued by the monitoring unit, and executing the step of acquiring first feedback data fed back by a first target channel indicated by first channel indication information according to the received first control signal and the first channel indication information indicating that the peripheral digital-to-analog conversion device needs to be subjected to direct current calibration;
and if the direct-current calibration is not required, receiving the second control signal issued by the monitoring unit, and executing the step of acquiring second feedback data fed back by a second target channel indicated by the second channel indication information according to the received second control signal and the second channel indication information which indicate that the peripheral digital-to-analog conversion device does not need the direct-current calibration.
4. The dc calibration method of claim 3, wherein the monitoring, by the monitoring unit, whether the peripheral dac device needs to be dc calibrated includes:
acquiring a direct current signal of the peripheral digital-to-analog converter through a monitoring unit, and judging whether the direct current signal fluctuates within a preset time length;
when the direct current signal is judged to fluctuate within the preset time length, determining that the peripheral digital-to-analog conversion device needs to be subjected to direct current calibration;
and when the direct current signal is judged not to fluctuate within the preset time, determining that the peripheral digital-to-analog conversion device does not need to carry out direct current calibration.
5. The dc calibration method of claim 4, wherein the obtaining, by a monitoring unit, the dc signal of the peripheral dac, and determining whether the dc signal fluctuates within a preset time period comprises:
acquiring the maximum value and the minimum value of a direct current signal of the peripheral digital-to-analog converter within a preset time length through a monitoring unit;
judging whether the difference value between the maximum value and the minimum value exceeds a preset threshold value through the monitoring unit;
when the difference value between the maximum value and the minimum value is judged to exceed a preset threshold value, determining that the direct current signal fluctuates;
and when the difference value between the maximum value and the minimum value is judged not to exceed a preset threshold value, determining that the direct current signal does not fluctuate.
6. A DC calibration system, which is applied in a digital repeater, the system comprises:
the device comprises an acquisition unit, a processing unit and a control unit, wherein the acquisition unit is used for acquiring first feedback data fed back by a first target channel indicated by first channel indication information according to a received first control signal and the first channel indication information which indicate that a peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration;
the predistortion processing unit is used for setting the first feedback data to zero and sending the first feedback data to the digital predistortion module;
and the control unit is used for controlling the peripheral digital-to-analog conversion device to carry out direct current calibration according to the first control signal.
7. The DC calibration system of claim 6,
the acquisition unit is further configured to acquire second feedback data fed back by a second target channel indicated by second channel indication information according to a received second control signal and the second channel indication information, where the received second control signal indicates that the peripheral digital-to-analog conversion device does not need to perform direct-current calibration;
and the predistortion processing unit is used for directly sending the second feedback data to the digital predistortion module for digital predistortion processing.
8. The dc calibration system of claim 7, further comprising:
the judging unit is used for monitoring whether the peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration or not through the monitoring unit before the acquiring unit acquires first feedback data fed back by a first target channel indicated by first channel indication information according to a received first control signal and the first channel indication information which indicate that the peripheral digital-to-analog conversion device needs to be subjected to direct-current calibration;
the receiving unit is used for receiving the first control signal issued by the monitoring unit when the judging unit judges that the direct current calibration is required;
the obtaining unit is specifically configured to, after the receiving unit receives the first control signal sent by the monitoring unit, obtain first feedback data fed back by a first target channel indicated by first channel indication information according to the received first control signal and the received first channel indication information indicating that the peripheral digital-to-analog conversion device needs to perform direct-current calibration;
the receiving unit is further configured to receive the second control signal issued by the monitoring unit when the determining unit determines that the dc calibration is not required;
and the obtaining unit is specifically configured to, after the receiving unit receives the second control signal sent by the monitoring unit, obtain, according to the received second control signal and the second channel indication information indicating that the peripheral digital-to-analog conversion device does not need to perform the dc calibration, second feedback data fed back by the second target channel indicated by the second channel indication information.
9. The dc calibration system of claim 8, wherein the manner for the determining unit to monitor whether the peripheral digital-to-analog conversion device needs to be dc calibrated through the monitoring unit is specifically:
the judging unit is used for acquiring the direct current signal of the peripheral digital-to-analog converter through the monitoring unit and judging whether the direct current signal fluctuates within a preset time length; when the direct current signal is judged to fluctuate within the preset time length, determining that the peripheral digital-to-analog conversion device needs to be subjected to direct current calibration; and when the direct current signal is judged not to fluctuate within the preset time, determining that the peripheral digital-to-analog conversion device does not need to carry out direct current calibration.
10. The dc calibration system of claim 9, wherein the determining unit is configured to obtain the dc signal of the peripheral dac through the monitoring unit, and determine whether the dc signal fluctuates within a preset time period specifically by:
the judging unit is used for acquiring the maximum value and the minimum value of the direct current signal of the peripheral digital-to-analog converter within a preset time length through the monitoring unit; judging whether the difference value between the maximum value and the minimum value exceeds a preset threshold value through the monitoring unit; when the difference value between the maximum value and the minimum value is judged to exceed a preset threshold value, determining that the direct current signal fluctuates; and when the difference value between the maximum value and the minimum value is judged not to exceed a preset threshold value, determining that the direct current signal does not fluctuate.
11. Computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the direct current calibration method according to any of claims 1 to 5.
12. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the dc calibration method according to any one of claims 1 to 5.
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| CN111162782B (en) | 2021-09-21 |
| WO2021136201A1 (en) | 2021-07-08 |
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