CN116599495A - Phase compensation method and device for filter - Google Patents

Phase compensation method and device for filter Download PDF

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Publication number
CN116599495A
CN116599495A CN202310014325.4A CN202310014325A CN116599495A CN 116599495 A CN116599495 A CN 116599495A CN 202310014325 A CN202310014325 A CN 202310014325A CN 116599495 A CN116599495 A CN 116599495A
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China
Prior art keywords
phase frequency
phase
filter
target
curve
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CN202310014325.4A
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Chinese (zh)
Inventor
林梦林
王大鹏
李男
宋骁雄
王家耀
杜玉欣
胡臻平
刘婧迪
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
Beijing Eswin Computing Technology Co Ltd
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
Beijing Eswin Computing Technology Co Ltd
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Priority to CN202310014325.4A priority Critical patent/CN116599495A/en
Publication of CN116599495A publication Critical patent/CN116599495A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H03H17/02—Frequency selective networks
    • H03H17/0248—Filters characterised by a particular frequency response or filtering method
    • H03H17/0264—Filter sets with mutual related characteristics
    • H03H17/0266—Filter banks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/40—Arrangements for reducing harmonics

Abstract

The application discloses a phase compensation method and a phase compensation device for a filter, which relate to the technical field of filters and mainly aim at realizing that the phase of the filter keeps linear change relative to frequency; the main technical scheme comprises the following steps: the filter comprises at least two filter structures, wherein the at least two filter structures are divided into two different groups, and the change trend of the phase frequency curve of the filter structure in one group is opposite to the change trend of the phase frequency curve of the filter structure in the other group; adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure; and when judging that the phase compensation condition is met, carrying out merging processing on the phase frequency curves corresponding to the adjusted filter structures.

Description

Phase compensation method and device for filter
Technical Field
The present application relates to the field of filter technologies, and in particular, to a phase compensation method and apparatus for a filter.
Background
The filter has functions of frequency selection, frequency division, and the like, and thus is widely used as a signal processing device in communication equipment. In order to ensure signal processing quality, the communication device requires strict phase characteristics of the filter and requires the filter to have linear phase-frequency characteristics.
However, with the development of communication technology, the bandwidth involved in the signal processed by the filter is becoming larger, which results in that when the filter processes an in-band signal, the delay of the low-frequency signal generated by the filter is inconsistent with the delay of the high-frequency signal, and thus, a group delay occurs. The occurrence of group delay causes the phase of the filter to be nonlinear with respect to the change in frequency, and the presence of nonlinearity seriously affects the signal processing quality of the filter.
Disclosure of Invention
In view of the above, the present application provides a phase compensation method and apparatus for a filter, so as to maintain the phase of the filter to change linearly with respect to frequency.
In order to achieve the above purpose, the present application mainly provides the following technical solutions:
in a first aspect, the present application provides a phase compensation method for a filter, the filter including at least two filter structures, wherein the at least two filter structures belong to two different groups, and a change trend of a phase frequency curve of the filter structure in one group is opposite to a change trend of a phase frequency curve of the filter structure in another group; the method comprises the following steps:
adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure;
And when judging that the phase compensation condition is met, carrying out merging processing on the phase frequency curves corresponding to the adjusted filter structures.
According to the phase compensation method for the filter, provided by the application, the phase frequency curve corresponding to each filter structure is adjusted by adjusting the parameter value of the target parameter corresponding to each filter structure in the filter. And when judging that the phase compensation condition is met, carrying out merging processing on the phase frequency curves corresponding to the adjusted filter structures. Therefore, the scheme provided by the application utilizes the characteristics of opposite variation trend of the phase frequency curves of the filter structures in the two groups to counteract nonlinearity appearing in the variation of the phase relative to the frequency, so that the scheme provided by the application can realize that the phase of the filter keeps linearly varying relative to the frequency.
In some embodiments, determining that the phase compensation condition is satisfied includes: correspondingly displaying the adjusted phase frequency curves corresponding to the filter structures in the two groups; when receiving the phase compensation confirmation instruction, judging that the phase compensation condition is met; the phase compensation confirmation instruction is issued after the user determines to perform phase compensation based on the displayed phase frequency curve.
In some embodiments, determining that the phase compensation condition is satisfied includes: for each packet, perform: combining the adjusted phase frequency curves corresponding to all the filtering structures in the group, and determining curve characteristic data of the phase frequency curves obtained by combining; and when judging that the difference between the curve characteristic data of the two groups is in the corresponding first difference range, judging that the phase compensation condition is met.
In some embodiments, determining that the phase compensation condition is satisfied includes: combining the phase frequency curves corresponding to all the filtering structures after adjustment to obtain a target phase frequency curve; and when the phase offset between the target phase frequency curve and the ideal phase frequency curve of the filter is judged to be in the first offset range, judging that the phase compensation condition is met.
In some embodiments, adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure includes: setting curve characteristic data corresponding to each group respectively; for each filtering structure in each packet, performing: adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure; so that the difference between the curve characteristic data of the first phase frequency curve corresponding to the grouping and the corresponding curve characteristic data is within a second difference range; the first phase frequency curve is a phase frequency curve obtained by combining the adjusted phase frequency curves corresponding to all the filtering structures in the group.
In some embodiments, adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure includes: combining the phase frequency curves corresponding to all the filtering structures in one group, and determining curve characteristic data of the phase frequency curves obtained after combination; for each filtering structure in another packet: adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure; so that the difference between the curve characteristic data of the second phase frequency curve corresponding to the grouping and the determined curve characteristic data is within a third difference range; the second phase frequency curve is a phase frequency curve obtained by combining the adjusted phase frequency curves corresponding to all the filtering structures in the group.
In some embodiments, adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure includes: determining a parameter value to be adjusted of the target parameter; determining a target resistance and a target capacitance corresponding to a target parameter in the filtering structure, wherein the ratio between the target resistance and the target capacitance determines the parameter value of the target parameter; determining a ratio corresponding to the parameter value to be adjusted, wherein the ratio is a ratio between the resistance value and the capacitance value; the resistance value of the target resistor and the capacitance value of the target capacitor are adjusted based on the selected ratio.
In some embodiments, the method further comprises: when the condition of the target is judged to exist, selecting a target filtering structure needing to be continuously adjusted from at least two filtering structures, and adjusting a phase frequency curve corresponding to the target filtering structure by adjusting the parameter value of the target parameter corresponding to the target filtering structure on the basis of the current parameter value of the target parameter corresponding to the target filtering structure; the target conditions include any one of the following: judging that the phase compensation condition is not met, and judging that the phase offset between the actual phase frequency curve and the ideal phase frequency curve of the filter is in a second offset range; the actual phase frequency curves are obtained by combining the phase frequency curves corresponding to the adjusted filtering structures.
In some embodiments, the curve characteristic data includes at least one of the following: peak and peak location.
In some embodiments, the target parameter corresponding to the filtering structure in one packet includes a local oscillation frequency, and the target parameter corresponding to the filtering structure in another packet includes a local oscillation frequency and/or a damping coefficient.
In a second aspect, the present application provides a phase compensation apparatus for a filter, the filter including at least two filter structures, wherein the at least two filter structures are grouped into two different groups, and a trend of a change in a phase frequency curve of the filter structure in one group is opposite to a trend of a change in a phase frequency curve of the filter structure in the other group; the device comprises:
the adjusting module is used for adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure;
and the compensation module is used for carrying out combination processing on the phase frequency curves corresponding to the adjusted filter structures when the phase compensation conditions are judged to be met.
According to the phase compensation method device for the filter, provided by the application, the phase frequency curve corresponding to each filter structure is adjusted by adjusting the parameter value of the target parameter corresponding to each filter structure in the filter. And when judging that the phase compensation condition is met, carrying out merging processing on the phase frequency curves corresponding to the adjusted filter structures. Therefore, the scheme provided by the application utilizes the characteristics of opposite variation trend of the phase frequency curves of the filter structures in the two groups to counteract nonlinearity appearing in the variation of the phase relative to the frequency, so that the scheme provided by the application can realize that the phase of the filter keeps linearly varying relative to the frequency.
In a third aspect, the present application provides a computer-readable storage medium, the storage medium comprising a stored program, wherein the program, when run, controls a device in which the storage medium is located to perform the phase compensation method for a filter of any one of the first aspects.
The beneficial effects of the computer readable storage medium provided by the embodiment of the present application are substantially the same as those of the phase compensation method for a filter of the first aspect, and therefore are not described herein.
In a fourth aspect, the present application provides a storage management apparatus comprising: a memory for storing a program; a processor, coupled to the memory, for executing a program to perform the phase compensation method for a filter of any one of the first aspects.
The beneficial effects of the storage management device provided by the embodiment of the present application are basically the same as those of the phase compensation method for the filter in the first aspect, so that the description thereof is omitted here.
The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 shows a flowchart of a phase compensation method for a filter according to an embodiment of the present application;
fig. 2 shows one of schematic diagrams of a phase frequency curve provided by an embodiment of the present application;
FIG. 3 shows a second phase frequency diagram according to an embodiment of the present application;
FIG. 4 shows a third phase frequency diagram according to an embodiment of the present application;
FIG. 5 shows a fourth phase frequency diagram provided by an embodiment of the present application;
FIG. 6 shows a fifth phase frequency diagram according to an embodiment of the present application;
fig. 7 shows one of schematic structural diagrams of a phase compensation device for a filter according to an embodiment of the present application;
fig. 8 shows a second schematic diagram of a phase compensation device for a filter according to an embodiment of the present application.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
At present, with the development of communication technology, the bandwidth involved in the signal processed by the filter is larger and larger, which results in that when the filter processes in-band signals, the delay generated by the low-frequency signal passing through the filter is inconsistent with the delay generated by the high-frequency signal, and the situation of group delay occurs. The occurrence of group delay causes the phase of the filter to be nonlinear with respect to the change in frequency, and the presence of nonlinearity seriously affects the signal processing quality of the filter.
The inventors have found that two or more filter structures are included in a filter such as a baseband filter, and these filter structures are divided into two different groups, and the change trend of the phase frequency curve of the filter structure in one group is opposite to the change trend of the phase frequency curve of the filter structure in the other group. A phase compensation method for a filter can be designed to counteract the nonlinearity that occurs in the phase versus frequency variation by taking advantage of the characteristics of the opposite trend of the phase-frequency curves of the filter structures in the two packets, thereby achieving a linear variation of the phase versus frequency of the filter.
Based on the above consideration, the embodiment of the application provides a phase compensation method and a device for a filter. The method comprises the following steps: and adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure in the filter. And when judging that the phase compensation condition is met, carrying out merging processing on the phase frequency curves corresponding to the adjusted filter structures. The merging process herein uses the characteristic of the opposite trend of the phase frequency curve of the filtering structure in the two packets to counteract the nonlinearity that occurs in the phase versus frequency variation.
The phase compensation method and the phase compensation device for the filter provided by the embodiment of the application can be applied to any filter needing to maintain a linear phase frequency curve, and the specific type of the filter is not limited by the embodiment of the application. For example, the phase compensation method and the phase compensation device for the filter provided by the embodiment of the application can be applied to a filter with a large bandwidth (450M and more), and can also be applied to a filter with a narrower bandwidth. For example, the method and the device for compensating the phase of the filter provided by the embodiment of the application can be applied to a baseband filter, and the baseband filter is applied to a radio frequency transceiver chip.
In addition, it should be noted that, the application scenario of the phase compensation method and the apparatus for a filter provided by the embodiment of the present application is not specifically limited. For example, when a filter deployed by any one communication device in a use process has nonlinear change of phase relative to frequency, the phase compensation method and the device for the filter provided by the embodiment of the application can be applied to the filter. For another example, the phase compensation method and the device for the filter provided by the embodiment of the application can be applied to the filter in the verification stage of research and development or factory production.
The phase compensation method and device for the filter provided by the embodiment of the application are specifically described below.
As shown in fig. 1, an embodiment of the present application provides a phase compensation method for a filter, which mainly includes the following steps:
101. and adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure.
The phase compensation method for the filter provided by the embodiment of the application is suitable for the filter, wherein the filter comprises at least two filter structures, and the at least two filter structures belong to two different groups. It should be noted that, the grouping is performed based on the trend of the phase frequency curve of the filtering structure. That is, no matter what the specific structure of the filtering structure is, the phase frequency curves can be divided into the same group as long as the change trend of the phase frequency curves is the same. The trend of the phase frequency curve of the filter structure in one group is opposite to the trend of the phase frequency curve of the filter structure in the other group. Since the filter structure in one group has opposite change trend to the phase frequency curve of the filter structure in the other group, and the phase frequency curve of the filter is determined by the phase frequency curves of all the filter structures included in the filter, the nonlinearity of the phase frequency curves of the filter structures can be counteracted by adjusting the phase frequency curves of the filter structures in the two groups, so that the phase of the filter keeps linear change relative to the frequency.
The number of the filtering structures and the specific types of the filtering structures in the filter are not particularly limited, so long as the filter comprises two groups of filtering structures with opposite change trends of phase frequency curves.
The filter is a third-order filter, and comprises a first-order filtering structure and a second-order filtering structure, wherein the change trend of phase frequency curves of the first-order filtering structure and the second-order filtering structure is opposite. The specific type of the first-order filtering structure and the second-order filtering structure can be selected based on service requirements, for example, the second-order filtering structure is a second-order filtering structure of a Thomas structure, and the first-order filtering structure is a first-order passive RC filtering structure.
The first order transfer function of the first order filter structure is as follows:
h(s) represents a first order transfer function of the first order filter structure; w (w) 0 The local oscillation frequency of the first-order filtering structure is represented; s denotes a parameter of the laplace transform of the first order filter structure.
The relation formula between the phase and the frequency can be obtained through the first-order transfer function of the first-order filter structure:wherein (1)>Representing the phase of the first order filter structure, w represents the frequency of the first order filter structure. The phase frequency curve of the first-order filtering structure shown in fig. 2 can be obtained through the formula.
The second order transfer function of the second order filter structure is as follows:
H(s) ′ representing a second order transfer function of the second order filter structure; w (w) 0 ′ The local oscillation frequency of the second-order filtering structure is represented; s is(s) ′ Parameters representing the Laplace transform of the second order filter structure; and xi represents the damping coefficient of the second order filter structure.
The relation formula between the phase and the frequency can be obtained through the second-order transfer function of the second-order filter structure:
representing the phase of the second order filter structure, w ′ Representing the frequency of the second order filter structure, q=1/2 ζ. The phase frequency curve of the second-order filter structure shown in fig. 3 can be obtained through the formula.
As can be seen from fig. 2 and 3, the change trend of the phase frequency curves of the first-order filtering structure and the second-order filtering structure is opposite, the phase frequency curve of the first-order filtering structure is concave, and the phase frequency curve of the second-order filtering structure is convex. Therefore, the phase frequency curve of the first-order filtering structure and the phase frequency curve of the second-order filtering structure are mutually compensated, and the nonlinearity of the filter is weakened. The nonlinearity of the phase frequency curves of the two filter structures can be counteracted by adjusting the phase frequency curves of the two filter structures, so that the phase of the filter remains linearly variable with respect to frequency.
The primary step of weakening the nonlinearity of the filter is to adjust the phase frequency curves corresponding to the filter structures by adjusting the parameter values of the target parameters corresponding to the filter structures so as to obtain phase frequency curves which can be mutually compensated. The following describes a specific method for adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure, and the method at least comprises the following two steps:
Firstly, the specific process of adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure comprises the following steps: and setting curve characteristic data corresponding to each group respectively. For each filtering structure in each packet, performing: adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure; so that the difference between the curve characteristic data of the first phase frequency curve corresponding to the grouping and the corresponding curve characteristic data is within a second difference range. The first phase frequency curve is a phase frequency curve obtained by combining the adjusted phase frequency curves corresponding to all the filtering structures in the group.
The curve characteristic data is used for describing waveform characteristics of a phase frequency curve, and is key data for canceling nonlinearity of each filtering structure. The curve characteristic data includes at least one of the following: peak and peak location.
When the phase frequency curve of each filtering structure is adjusted, curve characteristic data corresponding to each group is required to be set. The two curve characteristic data are set to cancel the nonlinearity of the phase frequency curve of the filter structure of the two packets. The curve characteristic data corresponding to each group is set based on the prior data, so that the adjustment of the phase frequency curves of the filtering structures in the two groups has clear and clear adjustment basis, and the rapid adjustment is convenient.
The curve characteristic data is used to guide the adjustment of the phase frequency curve of each filter structure within the corresponding packet, i.e. for one packet the final purpose of adjusting the filter structure therein is: the difference between the curve characteristic data of the first phase frequency curve obtained after the phase frequency curves of all the filter structures in the group are combined and the curve characteristic data set for the group is in a second difference range. The difference between the two is in the second difference range, which indicates that the phase frequency curves of all the filtering structures in the group meet the linear compensation requirement, and the phase frequency curves of the filtering structures in the other group are waited to be combined. The difference between the two is not in the second difference range, which indicates that a phase frequency curve which does not meet the linear compensation requirement exists in the group, and the phase frequency curve of the filtering structure in the group is continuously adjusted. In addition, the second difference range may be determined based on the service requirement, which is not limited in this embodiment. The smaller the range of values of the second difference range is, the better the phase compensation effect is.
The second specific process of adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure comprises the following steps: and merging the phase frequency curves corresponding to all the filtering structures in one group, and determining curve characteristic data of the phase frequency curves obtained after merging. For each filtering structure in another packet: adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure; so that the difference between the curve characteristic data of the second phase frequency curve corresponding to the grouping and the determined curve characteristic data is within a third difference range; the second phase frequency curve is a phase frequency curve obtained by combining the adjusted phase frequency curves corresponding to all the filtering structures in the group.
In order to avoid introducing excessive data and reduce the workload of adjusting the phase frequency curves, selecting one of the two groups, then carrying out merging processing on the phase frequency curves corresponding to all the filtering structures in the group, and determining curve characteristic data of the phase frequency curves obtained after merging. It should be noted that, the phase frequency curves corresponding to all the filtering structures in the selected group have the following two conditions: firstly, if the phase frequency curve of the filtering structure in the group is not adjusted, the phase frequency curve of the filtering structure in the group is the original phase frequency curve of the filtering structure. And secondly, the phase frequency curve of the filtering structure in the group is adjusted, and then the phase frequency curve of the filtering structure in the group is the phase frequency curve of the filtering structure after the latest adjustment.
The specific process of merging the phase frequency curves corresponding to all the filtering structures in the group is as follows: determining a phase frequency curve corresponding to each filtering structure in the group; superposing phases corresponding to the same frequency in each phase frequency curve to obtain phases corresponding to a plurality of frequencies respectively; and forming a combined phase frequency curve based on the frequency and the phase corresponding to the frequency.
After the combined phase frequency curve is obtained, the peak value of the phase frequency curve and the position of the peak value are set as curve characteristic data. The curve characteristic data is used to guide the adjustment of the phase frequency curve of each filter structure in another group.
For another packet, the final purpose of adjusting the filter structure therein is: the difference between the curve characteristic data of the second phase frequency curve obtained after the phase frequency curves of all the filtering structures in the group are combined and the set curve characteristic data is required to be within a third difference range. The difference between the two is in the third difference range, which indicates that the phase frequency curves of all the filtering structures in the group meet the linear compensation requirement, and the phase frequency curves of the filtering structures in the other group are waited to be combined. The difference between the two is not in the third difference range, which indicates that a phase frequency curve which does not meet the linear compensation requirement exists in the group, and the phase frequency curve of the filtering structure in the group is continuously regulated. In addition, the third difference range may be determined based on the service requirement, which is not limited in this embodiment. The smaller the numerical range of the third difference range, the better the phase compensation effect.
In both the above-mentioned methods, the step of adjusting the curve characteristic data of the phase frequency curve of the filter structure by adjusting the parameter value of the target parameter corresponding to the filter structure is referred to, and a specific embodiment of the step will be described below. The specific implementation process of adjusting the curve characteristic data of the phase frequency curve of the filter structure through adjusting the parameter value of the target parameter corresponding to the filter structure comprises the following steps 1A to 1D:
1A, determining a parameter value to be adjusted of a target parameter.
The target parameter is a parameter related to the filtering structure that affects the waveform variation of the phase frequency curve of the filtering structure. If the waveforms of the phase frequency curves of the filter structures in one group are concave, the target parameters corresponding to the filter structures in the group comprise local oscillation frequency; if the waveforms of the phase frequency curves of the filter structures in one group are all convex, the target parameters corresponding to the filter structures in the group comprise local oscillation frequency and/or damping coefficient.
The filter is a third-order filter, and comprises a first-order filtering structure and a second-order filtering structure, wherein the change trend of phase frequency curves of the first-order filtering structure and the second-order filtering structure is opposite. The target parameter of the first order filtering structure is the local oscillation frequency. The target parameters of the second-order filtering structure are local oscillation frequency and/or damping coefficient.
The parameter value to be adjusted to determine the target parameter needs to take into account the following two factors: firstly, the current parameter value of the target parameter; and secondly, the requirement on the waveform of the phase frequency curve of the filter structure, wherein the requirement represents the concave degree or the convex degree of the phase frequency curve.
The target parameter corresponding to the first-order filtering structure is a local oscillation frequency. The relationship between the local oscillation frequency and the phase frequency curve is described below with reference to fig. 4. Fig. 4 shows three phase frequency curves of K1, K2 and K3, where K1 is a phase frequency curve corresponding to the case where the local oscillation frequency of the first-order filtering structure takes the value of F1, K2 is a phase frequency curve corresponding to the case where the local oscillation frequency of the first-order filtering structure takes the value of F2, and K3 is a phase frequency curve corresponding to the case where the local oscillation frequency of the first-order filtering structure takes the value of F3. The size relation among the F1, the F2 and the F3 is as follows: f1 > F2 > F3. As can be seen from fig. 4, as the local oscillation frequency decreases, the greater the degree of dishing of the phase-frequency curve of the first-order filtering structure, the closer the location of the dishing point is to the horizontal axis.
According to the above, when the recess degree of the waveform of the expected phase frequency curve becomes larger, the determined frequency value to be adjusted of the local oscillation frequency needs to be smaller than the current frequency value of the local oscillation frequency.
The target parameter corresponding to the second-order filtering structure is a damping coefficient. The relationship between the damping coefficient and the phase frequency curve is described below with reference to fig. 5. Fig. 5 shows three phase frequency curves P1, P2 and P3, where P1 is a phase frequency curve corresponding to the second-order filter structure when the damping coefficient of the second-order filter structure takes the value ζ1, P2 is a phase frequency curve corresponding to the second-order filter structure when the damping coefficient of the second-order filter structure takes the value ζ2, and P3 is a phase frequency curve corresponding to the second-order filter structure when the damping coefficient of the second-order filter structure takes the value ζ3. The size relations of the three are that: ζ1 < ζ2 < ζ3. As can be seen from fig. 5, as the damping coefficient increases, the greater the degree of protrusion of the phase-frequency curve of the second-order filter structure, the farther the position of the protrusion point is from the horizontal axis.
From the above, it is known that, when the degree of protrusion of the waveform of the desired phase-frequency curve becomes large, the determined value to be adjusted of the damping coefficient needs to be larger than the current value of the damping coefficient.
And 1B, determining a target resistance and a target capacitance corresponding to the target parameter in the filter structure, wherein the ratio between the target resistance and the target capacitance determines the parameter value of the target parameter.
The parameter value of the target parameter is realized by adjusting the resistance value of the resistor and the capacitance value of the capacitor in the filter structure. The filter structure generally includes a large number of resistors and capacitors, so that the target resistor and the target capacitor corresponding to the target parameter in the filter structure need to be determined, and the resistor value of the target resistor and the capacitor value of the target capacitor are adjusted to realize the adjustment of the parameter value of the target parameter.
According to the embodiment of the application, the adjustment of the target parameter does not depend on the absolute values of the target capacitor and the target resistor, but depends on the ratio between the target resistor and the target capacitor, and the parameter value of the target parameter is determined by the ratio between the target resistor and the target capacitor. In this way, adjusting the target parameters does not increase cost and power consumption.
The determination process of the target resistance and the target capacitance comprises the following steps: and inquiring a first relation comparison table, and respectively selecting the capacitor and the resistor corresponding to the target parameter and the parameter value to be adjusted as a target capacitor and a target resistor. The first relation comparison table is preset and is used for recording the corresponding relation among the capacitance, the resistance, the target parameter and the parameter value.
1C, determining a ratio corresponding to the parameter value to be adjusted, wherein the ratio is a ratio between the resistance value and the capacitance value.
The adjustment of the target parameter depends on the ratio between the target resistance and the target capacitance, which determines the parameter value of the target parameter. It is therefore necessary to determine the ratio corresponding to the parameter value to be adjusted.
The determination of the ratio corresponding to the parameter value to be adjusted is: and inquiring a second relation comparison table, and extracting the ratio corresponding to the parameter value to be adjusted. The second relation comparison table is preset and is used for recording the corresponding relation among the ratio, the parameter value and the target parameter.
1D, adjusting the resistance value of the target resistor and the capacitance value of the target capacitor based on the selected ratio.
The adjustable resistor and the adjustable capacitor in the filter structure are respectively provided with a corresponding controller, so that after the ratio is determined, the resistance value of the target resistor and the capacitance value of the target capacitor are adjusted through the corresponding controllers. After the resistance value of the target resistor and the capacitance value of the target capacitor are adjusted, the parameter value of the target parameter is adjusted to the parameter value to be adjusted, and the waveform of the phase frequency curve of the filtering structure corresponds to the parameter value to which the target parameter is currently adjusted.
102. And when judging that the phase compensation condition is met, carrying out merging processing on the phase frequency curves corresponding to the adjusted filter structures.
The phase frequency curves of the filter structures are adjusted so that the phase frequency curves of the filter structures cancel out the phase nonlinearities. However, since the phase nonlinear cancellation effect of the phase-frequency curves of the respective adjusted filter structures may not be expected, it is necessary to determine whether the phase compensation condition is satisfied after the phase-frequency curves of the respective filter structures are adjusted, so that the phase-frequency curves corresponding to the respective adjusted filter structures are combined when the phase compensation condition is determined to be satisfied. And if the phase compensation condition is met, the phase nonlinear cancellation effect of the phase frequency curve of each filter structure after adjustment can be expected.
A determination method for determining that the phase compensation condition is satisfied is described below, and includes at least three kinds of methods:
first, the process of determining that the phase compensation condition is satisfied includes the steps of: and correspondingly displaying the adjusted phase frequency curves corresponding to the filter structures in the two groups. When receiving the phase compensation confirmation instruction, judging that the phase compensation condition is met; the phase compensation confirmation instruction is issued after the user determines to perform phase compensation based on the displayed phase frequency curve.
The purpose of showing the adjusted phase frequency curves corresponding to the filter structures in the two packets is to: and giving the authority of whether to perform phase compensation based on the phase frequency curves corresponding to the current adjusted filter structures to the user, and determining whether to perform combination processing on the phase frequency curves corresponding to the current adjusted filter structures by the user.
The method for correspondingly displaying the adjusted phase frequency curves corresponding to the filter structures in the two groups comprises the following two steps: and displaying the adjusted phase frequency curve corresponding to each filtering structure in each group. The display mode can enable a user to clearly know the change trend of the phase frequency curve of each filtering structure. In particular, when it is determined that the phase compensation condition is not satisfied, the user may find out the filter structure with emphasis adjustment according to the phase frequency curve of each filter structure. Another is that, for each packet, it is performed: and merging the adjusted phase frequency curves corresponding to all the filtering structures in the group to obtain a merged phase frequency curve. And correspondingly displaying the phase frequency curve after the combination processing of the two groups. When the phase compensation is carried out, the phase compensation is carried out by taking the group as a unit, so that the display mode can enable a user to clearly know the overall change condition of the phase frequency curves in different groups, and is convenient for the user to more intuitively judge whether the phase compensation is carried out based on the phase frequency curves corresponding to the current adjusted filter structures.
Under the condition that the user determines to perform phase compensation based on the phase frequency curve corresponding to each filtering structure after current adjustment, the user can send a phase compensation confirmation instruction. When the phase compensation confirmation instruction is received, it is determined that the phase compensation condition is satisfied. In order to facilitate the operation of the user, a corresponding phase compensation confirmation instruction key is arranged in the page corresponding to the phase frequency curve, and the user can issue a phase compensation confirmation instruction by triggering the key.
As shown in fig. 6, fig. 6 shows a phase frequency curve after the combination processing of two packets, where a phase frequency curve 1 is a phase frequency curve after the combination processing corresponding to a packet 1, and a phase frequency curve 2 is a phase frequency curve after the combination processing corresponding to a packet 2. And when receiving the phase compensation confirmation instruction, combining the phase frequency curve 1 and the phase frequency curve 2 to obtain the actual phase frequency curve of the filter. As shown in fig. 6, the phase frequency curve 3 shown in fig. 6 is an actual phase frequency curve of the filter. The phase shift between the obtained actual phase frequency curve and the ideal phase frequency curve (i.e. the phase frequency curve 4 in fig. 6) of the filter is within a preset shift range. The offset range is determined based on the service requirement, and the present embodiment is not particularly limited. Illustratively, the offset range is [ -1 °,1 ° ].
When the user judges that the phase compensation is performed based on the phase frequency curve corresponding to each filtering structure after the current adjustment, the phase offset between the actual phase frequency curve and the ideal phase frequency curve of the filter is larger, and at the moment, the user can send a continuous adjustment instruction so as to continuously adjust the phase frequency curve corresponding to each filtering structure based on the continuous adjustment instruction. It should be noted that, in order to reduce the workload of adjustment, the continuous adjustment instruction may carry an identifier of the filtering structure that needs to be continuously adjusted, so as to adjust only a phase frequency curve of the filtering structure corresponding to the identifier.
Secondly, the process of judging that the phase compensation condition is satisfied comprises the following steps: for each packet, perform: and merging the adjusted phase frequency curves corresponding to all the filtering structures in the group, and determining curve characteristic data of the phase frequency curves obtained by merging. And when judging that the difference between the curve characteristic data of the two groups is in the corresponding first difference range, judging that the phase compensation condition is met.
And merging the adjusted phase frequency curves corresponding to all the filtering structures in the same group, wherein the phase corresponding to the same frequency in each phase frequency curve is actually overlapped. It should be noted that, if the number of filter structures in the same packet is only one, after the merging process, the phase frequency curve corresponding to the packet is still the adjusted phase frequency curve corresponding to the filter structure.
The curve characteristic data can reflect the phase nonlinear cancellation effect of the phase frequency curves of the two groups, so that the curve characteristic data of the phase frequency curves obtained by combining each group needs to be determined. The curve characteristic data includes at least one of the following: peak and peak location.
And determining curve characteristic data of the phase frequency curves obtained by combining each group, and judging whether the difference between the curve characteristic data of the two groups is in a corresponding first difference range or not. Specifically, it is determined whether the two sets of related peaks are within a peak difference range, and whether the positions of the two sets of related peaks are within a position difference range.
When the difference between curve characteristic data of two groups is judged to be in a corresponding first difference range, the phase shift of a phase frequency curve obtained by combining the two groups between an actual phase frequency curve obtained by combining processing and an ideal phase frequency curve of a filter is judged to be in an offset range, the actual phase frequency curve is basically linear, and the quality of signals can be ensured when the filter works based on the actual phase frequency curve. Therefore, at this time, it is determined that the phase compensation condition is satisfied.
In determining that the difference between the curve characteristic data of the two packets is not within the corresponding first difference range, it is explained that at least one of the following may exist: the two groups of peaks are not in the peak difference range, and whether the positions of the two groups of peaks are in the position difference range. At this time, it is explained that the phase shift between the actual phase frequency curve obtained by combining the two packets and the ideal phase frequency curve of the filter is not in the shift range, the linearity of the actual phase frequency curve does not conform to the expectations, and if the filter works with the actual phase frequency curve under such circumstances, it is difficult to ensure the quality of the signal.
Thirdly, the process of judging that the phase compensation condition is satisfied comprises the following steps: and merging the phase frequency curves corresponding to all the filtering structures after adjustment to obtain a target phase frequency curve. And when the phase offset between the target phase frequency curve and the ideal phase frequency curve of the filter is judged to be in the first offset range, judging that the phase compensation condition is met.
And merging the adjusted phase frequency curves corresponding to all the filtering structures, namely superposing phases corresponding to the same frequency in the phase frequency curves of all the filtering structures to obtain a target phase frequency curve.
When the phase offset between the target phase frequency curve and the ideal phase frequency curve of the filter is judged to be in the first offset range, the phase offset between the target phase frequency curve and the ideal phase frequency curve of the filter is shown to be in the offset range, the target phase frequency curve is basically linear, and the filter can ensure the quality of signals when working based on the target phase frequency curve. Therefore, it is determined at this time that the phase compensation condition is satisfied.
When the phase offset between the target phase frequency curve and the ideal phase frequency curve of the filter is not in the first offset range, the phase offset between the target phase frequency curve and the ideal phase frequency curve of the filter is not in the offset range, the linearity condition of the target phase frequency curve does not accord with expectations, and if the filter works by using the actual phase frequency curve under the condition, the quality of signals is difficult to ensure.
The three determination methods can be flexibly selected based on the service requirement, and the embodiment is not particularly limited. And when the judgment method judges that the phase compensation condition is met, merging the phase frequency curves corresponding to the adjusted filter structures.
The specific process of merging the phase frequency curves corresponding to the adjusted filter structures comprises the following steps: determining phase frequency curves corresponding to the adjusted filter structures; superposing phases corresponding to the same frequency in each phase frequency curve to obtain phases corresponding to a plurality of frequencies respectively; an actual phase-frequency curve is formed based on the frequency and the phase corresponding to the frequency.
And after the phase frequency curves corresponding to the adjusted filtering structures are combined, obtaining the actual phase frequency curve of the filter. In order to ensure the quality of the output signal of the filter, the phase offset between the actual phase frequency curve and the rational phase frequency curve of the filter is within a preset offset range. The preset offset range may be determined based on the service requirement, and the embodiment is not specifically limited. The preset offset range is, for example, -1 °,1 ° ].
After the actual phase frequency curve of the filter is obtained, the filter outputs a signal based on the actual phase frequency curve. Because the phase offset between the actual phase frequency curve and the rational phase frequency curve of the filter is in the preset offset range, the group delay condition of the filter can be basically eliminated, and the quality of the output signal of the filter can be ensured.
According to the phase compensation method for the filter, provided by the embodiment of the application, the phase frequency curve corresponding to each filter structure is adjusted by adjusting the parameter value of the target parameter corresponding to each filter structure in the filter. And when judging that the phase compensation condition is met, carrying out merging processing on the phase frequency curves corresponding to the adjusted filter structures. Therefore, the scheme provided by the embodiment of the application utilizes the characteristics of opposite variation trend of the phase frequency curves of the filtering structures in the two groups to counteract the nonlinearity in the phase relative to the frequency variation, so that the scheme provided by the embodiment of the application can realize that the phase of the filter keeps linearly varying relative to the frequency.
In some embodiments of the present application, the phase compensation method for a filter may further include the steps of: when the target condition is judged to exist, a target filter structure needing to be continuously adjusted is selected from at least two filter structures, and a phase frequency curve corresponding to the target filter structure is adjusted by adjusting the parameter value of the target parameter corresponding to the target filter structure on the basis of the current parameter value of the target parameter corresponding to the target filter structure.
The target conditions herein include any one of the following: and judging that the phase compensation condition is not met, and judging that the phase offset between the actual phase frequency curve and the ideal phase frequency curve of the filter is in a second offset range. The existence of the above target situation indicates that the phase nonlinear cancellation effect of the phase frequency curve of each filtering structure after current adjustment cannot reach the expectations, so that the phase frequency curve of each filtering structure needs to be continuously adjusted.
The specific method for continuously adjusting the phase frequency curve of each filtering structure comprises the following steps:
and step one, selecting a target filter structure needing to be continuously adjusted from the two filter structures.
The selection method of the target filtering structure comprises the following two steps: firstly, select partial filter structure of filter as target filter structure, target filter can same group also can be different group, like this only to target filter structure adjust when adjusting can, and other not selected as target filter structure will not be adjusted to can reduce the work load of adjusting. And secondly, the selected target filtering structure is a filtering structure belonging to the same group, and can be part or all of the filtering structures in the same group. And for the other group, carrying out combination processing on the phase frequency curves after adjustment corresponding to all the filtering structures in the group, and determining curve characteristic data of the phase frequency curves obtained by combination. In this way, the phase frequency curve of the target filter structure can be adjusted with the determined curve characteristic data as a reference. The phase frequency curve is more targeted by adjusting in the mode. And thirdly, all filters in the filters are selected as target filters, and the mode has large adjustment workload, but because all filters are target filters, the phase frequency curve of each filter can be adjusted more flexibly, so that the phase compensation condition can be met rapidly.
And step two, adjusting a phase frequency curve corresponding to the target filtering structure by adjusting the parameter value of the target parameter corresponding to the target filtering structure on the basis of the current parameter value of the target parameter corresponding to the target filtering structure.
In order to reduce blindness of phase frequency curve adjustment, the phase frequency curve of the target filter structure is adjusted based on the current parameter value of the target parameter corresponding to the target filter structure.
Further, another embodiment of the present application provides a phase compensation apparatus for a filter, where the filter includes at least two filter structures, where the at least two filter structures belong to two different groups, and a change trend of a phase frequency curve of the filter structure in one group is opposite to a change trend of a phase frequency curve of the filter structure in another group; as shown in fig. 7, the apparatus includes:
the adjusting module 21 is configured to adjust a phase frequency curve corresponding to each filtering structure by adjusting a parameter value of a target parameter corresponding to each filtering structure;
and the compensation module 22 is configured to combine the phase-frequency curves corresponding to the adjusted filter structures when it is determined that the phase compensation condition is satisfied.
According to the phase compensation device for the filter, provided by the embodiment of the application, the phase frequency curve corresponding to each filter structure is adjusted by adjusting the parameter value of the target parameter corresponding to each filter structure in the filter. And when judging that the phase compensation condition is met, carrying out merging processing on the phase frequency curves corresponding to the adjusted filter structures. Therefore, the scheme provided by the embodiment of the application utilizes the characteristics of opposite variation trend of the phase frequency curves of the filtering structures in the two groups to counteract the nonlinearity in the phase relative to the frequency variation, so that the scheme provided by the embodiment of the application can realize that the phase of the filter keeps linearly varying relative to the frequency.
In some embodiments, as shown in fig. 8, the compensation module 22 includes:
a first determining unit 221, configured to correspondingly display adjusted phase-frequency curves corresponding to the filtering structures in the two packets; when receiving the phase compensation confirmation instruction, judging that the phase compensation condition is met; the phase compensation confirmation instruction is issued after the user determines to perform phase compensation based on the displayed phase frequency curve.
In some embodiments, as shown in fig. 8, the compensation module 22 includes:
a second determining unit 222, configured to perform, for each packet: combining the adjusted phase frequency curves corresponding to all the filtering structures in the group, and determining curve characteristic data of the phase frequency curves obtained by combining; and when judging that the difference between the curve characteristic data of the two groups is in the corresponding first difference range, judging that the phase compensation condition is met.
In some embodiments, as shown in fig. 8, the compensation module 22 includes:
a third determining unit 223, configured to combine the adjusted phase frequency curves corresponding to all the filtering structures to obtain a target phase frequency curve; and when the phase offset between the target phase frequency curve and the ideal phase frequency curve of the filter is judged to be in the first offset range, judging that the phase compensation condition is met.
In some embodiments, as shown in fig. 8, the adjustment module 21 includes:
a first adjusting unit 211, configured to set curve characteristic data corresponding to each group; for each filtering structure in each packet, performing: adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure; so that the difference between the curve characteristic data of the first phase frequency curve corresponding to the grouping and the corresponding curve characteristic data is within a second difference range; the first phase frequency curve is a phase frequency curve obtained by combining the adjusted phase frequency curves corresponding to all the filtering structures in the group.
In some embodiments, as shown in fig. 8, the adjustment module 21 includes:
the second adjusting unit 212 is configured to combine the phase frequency curves corresponding to all the filtering structures in a group, and determine curve characteristic data of the phase frequency curves obtained after combination; for each filtering structure in another packet: adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure; so that the difference between the curve characteristic data of the second phase frequency curve corresponding to the grouping and the determined curve characteristic data is within a third difference range; the second phase frequency curve is a phase frequency curve obtained by combining the adjusted phase frequency curves corresponding to all the filtering structures in the group.
In some embodiments, as shown in fig. 8, the first adjusting unit 211 is specifically configured to determine a parameter value to be adjusted for the target parameter; determining a target resistance and a target capacitance corresponding to a target parameter in the filtering structure, wherein the ratio between the target resistance and the target capacitance determines the parameter value of the target parameter; determining a ratio corresponding to the parameter value to be adjusted, wherein the ratio is a ratio between the resistance value and the capacitance value; the resistance value of the target resistor and the capacitance value of the target capacitor are adjusted based on the selected ratio.
In some embodiments, as shown in fig. 8, the second adjusting unit 212 is specifically configured to determine a parameter value to be adjusted to the target parameter; determining a target resistance and a target capacitance corresponding to a target parameter in the filtering structure, wherein the ratio between the target resistance and the target capacitance determines the parameter value of the target parameter; determining a ratio corresponding to the parameter value to be adjusted, wherein the ratio is a ratio between the resistance value and the capacitance value; the resistance value of the target resistor and the capacitance value of the target capacitor are adjusted based on the selected ratio.
In some embodiments, as shown in fig. 8, the adjusting module 21 is further configured to, when it is determined that a target situation exists, select a target filtering structure that needs to be continuously adjusted from at least two filtering structures, and adjust a phase-frequency curve corresponding to the target filtering structure by adjusting a parameter value of a target parameter corresponding to the target filtering structure based on a current parameter value of a target parameter corresponding to the target filtering structure; the target conditions include any one of the following: and judging that the phase compensation condition is not met, and judging that the phase offset between the actual phase frequency curve and the ideal phase frequency curve of the filter is in a second offset range.
In some embodiments, the curve characteristic data includes at least one of the following: peak and peak location.
In some embodiments, the target parameter corresponding to the filtering structure in one packet includes a local oscillation frequency, and the target parameter corresponding to the filtering structure in another packet includes a local oscillation frequency and/or a damping coefficient.
In the phase compensation device for a filter provided by the embodiment of the present application, details adopted in the operation process of each functional module may be referred to the corresponding method of the above method embodiment, and will not be described herein.
Further, according to the above embodiment, another embodiment of the present application further provides a computer readable storage medium, where the storage medium includes a stored program, and when the program runs, the device where the storage medium is controlled to execute the above phase compensation method for a filter.
The beneficial effects of the computer readable storage medium provided by the embodiment of the application are basically the same as those of the phase compensation method for the filter, and therefore, the description thereof is omitted here.
Further, another embodiment of the present application also provides a storage management device, including: a memory for storing a program; and a processor coupled to the memory for executing a program to perform the phase compensation method for the filter.
The beneficial effects of the storage management device provided by the embodiment of the application are basically the same as those of the phase compensation method for the filter, so that the description thereof is omitted here.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
It will be appreciated that the relevant features of the methods and apparatus described above may be referenced to one another. In addition, the "first", "second", and the like in the above embodiments are for distinguishing the embodiments, and do not represent the merits and merits of the embodiments.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
The algorithms and displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general-purpose systems may also be used with the teachings herein. The required structure for a construction of such a system is apparent from the description above. In addition, the present application is not directed to any particular programming language. It should be appreciated that the teachings of the present application as described herein may be implemented in a variety of programming languages and that the foregoing descriptions of specific languages are provided for disclosure of preferred embodiments of the present application.
Furthermore, the memory may include volatile memory, random Access Memory (RAM) and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), in a computer readable medium, the memory including at least one memory chip.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data tapping device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data tapping device, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data cutting apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data-cutting apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims (13)

1. A phase compensation method for a filter, wherein the filter comprises at least two filtering structures, wherein the at least two filtering structures belong to two different groups, and the change trend of a phase frequency curve of the filtering structure in one group is opposite to the change trend of a phase frequency curve of the filtering structure in the other group; the method comprises the following steps:
Adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure;
and when judging that the phase compensation condition is met, carrying out merging processing on the phase frequency curves corresponding to the adjusted filter structures.
2. The method of claim 1, wherein determining that the phase compensation condition is satisfied comprises:
correspondingly displaying the adjusted phase frequency curves corresponding to the filter structures in the two groups;
when receiving the phase compensation confirmation instruction, judging that the phase compensation condition is met; the phase compensation confirmation instruction is issued after the user determines to perform phase compensation based on the displayed phase frequency curve.
3. The method of claim 1, wherein determining that the phase compensation condition is satisfied comprises:
for each packet, perform: combining the adjusted phase frequency curves corresponding to all the filtering structures in the group, and determining curve characteristic data of the phase frequency curves obtained by combining;
and when judging that the difference between the curve characteristic data of the two groups is in the corresponding first difference range, judging that the phase compensation condition is met.
4. The method of claim 1, wherein determining that the phase compensation condition is satisfied comprises:
combining the phase frequency curves corresponding to all the filtering structures after adjustment to obtain a target phase frequency curve;
and when the phase offset between the target phase frequency curve and the ideal phase frequency curve of the filter is judged to be in a first offset range, judging that the phase compensation condition is met.
5. The method according to claim 1, wherein adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure comprises:
setting curve characteristic data corresponding to each group respectively;
for each filtering structure in each packet, performing: adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure; so that the difference between the curve characteristic data of the first phase frequency curve corresponding to the group and the corresponding curve characteristic data is in a second difference range; the first phase frequency curve is a phase frequency curve obtained by combining the adjusted phase frequency curves corresponding to all the filtering structures in the group.
6. The method according to claim 1, wherein adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure comprises:
combining the phase frequency curves corresponding to all the filtering structures in one group, and determining curve characteristic data of the phase frequency curves obtained after combination;
for each filtering structure in another packet: adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure; so that the difference between the curve characteristic data of the second phase frequency curve corresponding to the group and the determined curve characteristic data is within a third difference range; the second phase frequency curve is a phase frequency curve obtained by combining the adjusted phase frequency curves corresponding to all the filtering structures in the group.
7. The method according to claim 5 or 6, wherein adjusting curve characteristic data of a phase frequency curve of the filtering structure by adjusting parameter values of target parameters corresponding to the filtering structure comprises:
determining a parameter value to be adjusted of the target parameter;
Determining a target resistance and a target capacitance corresponding to the target parameter in the filter structure, wherein the ratio between the target resistance and the target capacitance determines the parameter value of the target parameter;
determining a ratio corresponding to the parameter value to be adjusted, wherein the ratio is a ratio between a resistance value and a capacitance value;
and adjusting the resistance value of the target resistor and the capacitance value of the target capacitor based on the selected ratio.
8. The method according to any one of claims 1-6, further comprising:
when judging that a target condition exists, selecting a target filtering structure which needs to be continuously adjusted from the at least two filtering structures, and adjusting a phase frequency curve corresponding to the target filtering structure by adjusting the parameter value of a target parameter corresponding to the target filtering structure on the basis of the current parameter value of a target parameter corresponding to the target filtering structure;
wherein the target condition includes any one of the following: and judging that the phase compensation condition is not met, and judging that the phase offset between the actual phase frequency curve and the ideal phase frequency curve of the filter is in a second offset range, wherein the actual phase frequency curve is a curve obtained by combining the phase frequency curves corresponding to the adjusted filter structures.
9. The method of any one of claims 3, 5, 6, wherein the curve characteristic data comprises at least one of: peak and peak location.
10. The method according to any of claims 1-6, wherein the target parameter corresponding to the filtering structure in one packet comprises a local oscillator frequency and the target parameter corresponding to the filtering structure in the other packet comprises a local oscillator frequency and/or a damping coefficient.
11. A phase compensation arrangement for a filter, characterized in that the filter comprises at least two filter structures, wherein the at least two filter structures belong to two different groups, and the trend of the phase frequency curve of the filter structure in one group is opposite to the trend of the phase frequency curve of the filter structure in the other group; the device comprises:
the adjusting module is used for adjusting the phase frequency curve corresponding to each filtering structure by adjusting the parameter value of the target parameter corresponding to each filtering structure;
and the compensation module is used for carrying out combination processing on the phase frequency curves corresponding to the adjusted filter structures when the phase compensation conditions are judged to be met.
12. A computer-readable storage medium, characterized in that the storage medium comprises a stored program, wherein the program, when run, controls a device in which the storage medium is located to perform the phase compensation method for a filter according to any one of claims 1 to 10.
13. A storage management device, the storage management device comprising:
a memory for storing a program;
a processor coupled to the memory for running the program to perform the phase compensation method for a filter of any one of claims 1 to 10.
CN202310014325.4A 2023-01-05 2023-01-05 Phase compensation method and device for filter Pending CN116599495A (en)

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CN110221268A (en) * 2019-06-21 2019-09-10 西北核技术研究院 A kind of method phase-magnitude calibration filter and promote the non-coherent radar signal processing performance of short pulse
CN111901263A (en) * 2020-08-05 2020-11-06 Oppo广东移动通信有限公司 Wireless signal compensation method, value determination method, device, equipment and medium

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5121009A (en) * 1990-06-15 1992-06-09 Novatel Communications Ltd. Linear phase low pass filter
US20190067949A1 (en) * 2017-08-24 2019-02-28 Mitsubishi Heavy Industries, Ltd. Control device for distributed power supply system, distributed power supply system, and control program of distributed power supply system
CN110221268A (en) * 2019-06-21 2019-09-10 西北核技术研究院 A kind of method phase-magnitude calibration filter and promote the non-coherent radar signal processing performance of short pulse
CN111901263A (en) * 2020-08-05 2020-11-06 Oppo广东移动通信有限公司 Wireless signal compensation method, value determination method, device, equipment and medium

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