CN114124117A - Radio frequency signal phase automatic control method and system of parallel operation system - Google Patents
Radio frequency signal phase automatic control method and system of parallel operation system Download PDFInfo
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- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 48
- 238000002955 isolation Methods 0.000 claims description 12
- 238000012216 screening Methods 0.000 claims description 10
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- 230000001276 controlling effect Effects 0.000 description 10
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- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
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Abstract
The application provides a radio frequency signal phase automatic control method and system of a parallel operation system, and relates to the field of radio and television transmission. The parallel operation system comprises a plurality of power amplifier units, and the method comprises the following steps: judging whether the blocking zero point is larger than a preset value or not, wherein the blocking zero point is the sum of blocking currents of all power amplification units; and if so, controlling the phase adjuster to adjust the phase of the power amplification unit until the blocking zero point is smaller than a preset value, wherein the phase adjustment comprises phase positive adjustment and phase negative adjustment. In this way, automatic and fast adjustment of the phase of the radio frequency signal can be achieved.
Description
Technical Field
The application relates to the field of radio and television transmission, in particular to a radio frequency signal phase automatic control method and system of a parallel operation system.
Background
In broadcast communication technology, a high-power transmitter is usually required to ensure the normal broadcasting of programs. Sometimes, a plurality of small power transmitters (i.e. power amplifier units) are adopted, and a parallel operation mode is adopted to replace a large power transmitter. When the phases of the radio frequency signals transmitted by each power amplification unit are the same, the optimal output effect can be ensured; if the phase deviation of the radio frequency signal transmitted by the power amplification unit is large, the output radio frequency signal has distortion problem, and the power loss is increased, thereby influencing the normal work of the power amplification unit.
The existing method for realizing the same phase of the radio frequency signal output by each power amplification unit comprises the following steps: and a phase regulator is arranged in each power amplification unit, the blocking current of each power amplification unit is monitored, and the phase regulator is manually regulated according to the magnitude of the blocking current, so that the phase of the radio-frequency signal is regulated.
After the power amplification unit works for a long time, the problems of aging of devices and the like can occur, so that the phase of the output radio-frequency signal can be influenced again, and the effect of the output radio-frequency signal is further influenced; and the operation of manually adjusting the phase is also complicated, and therefore, the adjustment efficiency is low.
Disclosure of Invention
In order to realize automatic and rapid adjustment of the phase of the radio frequency signal. The application provides a radio frequency signal phase automatic control method and system of a parallel machine system.
In a first aspect of the present application, a method for automatically controlling a phase of a radio frequency signal of a parallel operation system is provided. The parallel operation system comprises a plurality of power amplifier units, and the method comprises the following steps:
judging whether an isolation zero point is larger than a preset value or not, wherein the isolation zero point is the sum of isolation currents of all the power amplification units;
and if so, controlling a phase adjuster to adjust the phase of the power amplification unit until the blocking zero point is smaller than the preset value, wherein the phase adjustment comprises phase positive adjustment and phase negative adjustment.
By adopting the technical scheme, when the separation zero point is identified to be larger than the preset value, the phase deviation between the radio-frequency signals output by each power amplification unit is shown, therefore, after the separation zero point is identified to be larger than the preset value, the phase adjustment is automatically and quickly carried out on the power amplification units, the separation current of each power amplification unit is continuously monitored in the phase adjustment process, and the adjustment is finished until the separation zero point is smaller than the preset value, so that the phase of the radio-frequency signals is automatically and quickly adjusted.
Optionally, the phase adjusting the power amplifier unit includes: screening out the maximum blocking current from all the blocking currents; performing phase positive adjustment on the power amplification unit corresponding to the maximum blocking current; judging whether the blocking current after phase adjustment is the minimum in all the blocking currents or not; if yes, the phase adjustment of the power amplification unit is finished.
Optionally, the phase adjusting the power amplifier unit further includes: if not, controlling the phase adjuster to perform phase positive adjustment on the power amplification unit again.
Optionally, the phase adjusting the power amplifier unit further includes: judging whether the blocking current after the phase adjustment is larger than the blocking current before the phase adjustment; if so, controlling the phase adjuster to perform phase reversal adjustment on the power amplification unit until the blocking current after the phase adjustment is smaller than the blocking current before the phase adjustment.
Optionally, before the determining whether the blocking zero point is greater than the preset value, the method further includes: and obtaining the blocking current of each power amplification unit.
In a second aspect of the present application, an automatic control system for radio frequency signal phase of a parallel operation system is provided. The parallel operation system comprises a plurality of power amplifier units, and the radio frequency signal phase automatic control system comprises:
the judging module is used for judging whether an isolation zero point is larger than a preset value, wherein the isolation zero point is the sum of isolation currents of all the power amplification units;
and the phase adjustment control module is used for controlling the phase adjuster to perform phase adjustment on the power amplification unit until the blocking zero point is smaller than the preset value when the blocking zero point is larger than the preset value, and the phase adjustment comprises phase positive adjustment and phase negative adjustment.
Optionally, the phase adjustment control module is specifically configured to: screening out the maximum blocking current from all the blocking currents; performing phase positive adjustment on the power amplification unit corresponding to the maximum blocking current; judging whether the blocking current after phase adjustment is the minimum in all the blocking currents or not; if yes, the phase adjustment of the power amplification unit is finished.
Optionally, the radio frequency signal phase automatic control system further includes an obtaining module, where the obtaining module is configured to obtain the blocking current of each power amplifier unit.
In a third aspect of the present application, an electronic device is provided. The electronic device includes: a memory having a computer program stored thereon and a processor implementing the method as described above when executing the program.
In a fourth aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored which, when being executed by a processor, carries out the method as according to the first aspect of the present application.
It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the application, nor is it intended to limit the scope of the application. Other features of the present application will become apparent from the following description.
Drawings
The above and other features, advantages and aspects of various embodiments of the present application will become more apparent by referring to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, like or similar reference characters designate like or similar elements, and wherein:
fig. 1 is a block diagram of an automatic control system for rf signal phase of a parallel operation system according to an embodiment of the present application;
fig. 2 is a flowchart of a method for automatically controlling the phase of the rf signal of the parallel operation system in the embodiment of the present application;
fig. 3 is a block diagram of an electronic device in an example of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.
In order to facilitate understanding of the embodiments of the present application, some terms referred to in the embodiments of the present application are first explained.
In the description of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the embodiment of the present application, a parallel operation system refers to a system in which a plurality of low power transmitters (i.e., power amplification units) operate in parallel. The blocking current is current flowing through a blocking load resistor in the power amplification unit, and the magnitude of the current can represent the phase relation of the radio frequency signal. And the blocking zero point is the sum of blocking currents of all power amplification units in the parallel system.
Fig. 1 shows a block diagram of an automatic control system for radio frequency signal phase of a parallel operation system in an embodiment of the present application.
Referring to fig. 1, the system for automatically controlling the phase of the radio frequency signal includes a determining module 110 for determining whether the blocking zero point is greater than a preset value, and a phase adjustment control module 120 for controlling the phase adjuster 140 to perform phase adjustment on the power amplifier unit until the blocking zero point is less than the preset value when the blocking zero point is greater than the preset value.
It should be noted that the preset value is the sum of blocking currents of all the power amplification units when the phase difference of the radio frequency signals output by the power amplification units tends to be minimum, and specifically, the preset value may be set according to the actual application situation.
Further, the phase adjustment includes phase positive and phase negative adjustments. Wherein, the phase positive modulation and the phase negative modulation can be set according to the situation. For example, in the practical application process, the number of times of phase delay of the radio frequency signal output by the power amplification unit is large, and the number of times of phase advance is small, the phase is adjusted to be positive phase advance; the phase delay adjustment is set to the phase reversal adjustment.
By adopting the technical scheme, the blocking zero represents the sum of the blocking currents of all the power amplification units, so that whether the blocking currents of all the power amplification units are too large can be monitored by judging whether the blocking zero is larger than a preset value through the judging module 110, so that the phase relation between the power amplification units is monitored, and when the judging module 110 detects that the blocking zero is larger than the preset value, the phase adjusting control module 120 controls the phase adjuster 140 to adjust the phases of the power amplification units, so that the phases of the power amplification units are automatically adjusted.
The determining module 110 and the phase adjustment control module 120 are described in detail below.
In this embodiment, the system for automatically controlling the phase of the radio frequency signal further includes an obtaining module 130, the obtaining module 130 includes a plurality of current collecting devices 131, each power amplifier unit is provided with a current collecting device 131 for collecting the blocking current of the power amplifier unit, and the current collecting devices 131 can use the existing current sensor. The current collecting device 131 of each power amplifier unit is provided with a code representing its identity information.
The judgment module 110 includes a current acquisition unit 111, a calculation unit 112, and a first judgment unit 113.
The current obtaining unit 111 is provided with a plurality of channels, and each channel is correspondingly connected with the current collecting device 131 of one power amplifier unit. The current collection device 131 outputs the collected blocking current to the current acquisition unit 111, and meanwhile, the current acquisition unit 111 can call the code of the corresponding current collection device 131 according to the receiving channel. The current acquisition unit 111 outputs the acquired barrier current to the calculation unit 112. The calculating unit 112 calculates a blocking zero point according to the collected blocking current, and outputs the blocking zero point to the first judging unit 113. The first determining unit 113 determines whether the blocking zero is greater than a predetermined value, and outputs the determination result to the phase adjustment control module 120.
The phase adjustment control module 120 includes a screening unit 121, a second judging unit 122, and a control unit 123.
Specifically, the screening unit 121 is connected to the first judgment unit 113 and the current acquisition unit 111. The first judging unit 113 outputs the judgment result to the screening unit 121. The current obtaining unit 111 outputs the blocking current and the corresponding code of the current collecting device 131 to the screening unit 121. If the result output by the first determining unit 113 is that the blocking zero point is greater than the preset value, the screening unit 121 screens out the maximum blocking current from all the blocking currents, and outputs the code of the current collecting device 131 corresponding to the maximum blocking current to the control unit 123. The control unit 123 performs phase adjustment on the phase of the corresponding power amplifier unit according to the code.
In the embodiment of the present application, a phase adjuster 140 is further provided, and the phase adjuster 140 adjusts the phase of the power amplifier unit according to the command output by the control unit 123. The phase adjuster 140 is a conventional device, and thus, will not be described herein in detail.
After the phase adjustment, the second determining unit 122 obtains the blocking current of the power amplifier unit after the phase adjustment and the blocking currents of the other power amplifier units from the current obtaining unit 111. The second determining unit 122 determines whether the blocking current of the power amplifier unit after the phase adjustment is the minimum of all the blocking currents, and if so, the phase adjustment of the power amplifier unit is finished.
After the phase adjustment of the power amplifier unit is finished, the determining module 110 determines again whether the blocking zero point is greater than the preset value, if so, the phase adjustment control module 120 loops the steps; if not, the phase adjustment is finished.
For example, assuming that the parallel operation system includes three power amplifier units, the codes of the current collecting devices 131 in the three power amplifier units are sequentially No. 1, No. 2, and No. 3, the blocking currents obtained from the three power amplifier units are sequentially 1A, 2A, and 3A, the blocking zero point is 6A and the preset value is 5A through calculation of the calculating unit 112, the determining unit outputs the determination result that the blocking zero point is greater than the preset value to the phase adjustment control module 120, the phase adjustment control module 120 performs phase adjustment, the screening unit 121 screens out the maximum blocking current, which is 3A, from the three blocking currents, and the code of the current collecting device 131 corresponding to 3A is No. 3, and the control unit 123 controls the phase adjuster 140 to perform phase adjustment on the power amplifier unit in which the current collecting device 131 No. 3 is installed.
After the phase adjustment is performed on the power amplifier unit with the No. 3 current collecting device 131, the second determining unit 122 may obtain the blocking current adjusted by the power amplifier unit from the current obtaining unit 111 to determine whether the blocking current is the minimum of the three blocking currents, and if so, the phase adjustment on the power amplifier unit is completed.
In some embodiments, if the second determining unit 122 determines that the blocking current after the phase adjustment is not the minimum value among all the blocking currents, the determination result is output to the control unit 123, and the control unit 123 controls the phase adjuster 140 to perform the phase adjustment on the power amplifier unit again until the blocking current of the power amplifier unit is the minimum value among all the blocking currents.
In some embodiments, the phase adjustment control module 120 further includes a third determining unit 124, where the third determining unit 124 is configured to determine whether the blocking current after the phase adjustment is larger than the blocking current before the phase adjustment. Specifically, after the phase adjuster 140 performs phase adjustment on the power amplifier unit with the maximum blocking current, the third determining unit 124 may obtain the blocking current of the power amplifier unit after the phase adjustment from the current obtaining unit 111, and compare the blocking current after the phase adjustment with the blocking current before the phase adjustment to determine whether the phase adjustment direction is correct.
If the third determining unit 124 determines that the blocking current of the power amplifier unit after the phase adjustment is larger than the blocking current before the phase adjustment, the determination result is output to the control unit 123, and the control unit 123 controls the phase adjuster 140 to perform the reverse adjustment on the phase of the power amplifier unit until the blocking current of the power amplifier unit after the phase adjustment is smaller than the blocking current before the phase adjustment.
For example, assume that the phase is set to be adjusted to be advanced to be phase-adjusted; the phase delay adjustment is set as phase reverse adjustment, the parallel operation system comprises three power amplifier units, the codes of the current acquisition devices 131 in the three power amplifier units are sequentially No. 1, No. 2 and No. 3, the blocking currents acquired from the three power amplifier units are sequentially 2A, 2A and 3A, through the calculation of the calculation unit 112, the blocking zero point is 7A, the preset value is 5A, and then the phase adjustment control module 120 performs phase positive adjustment on the phase of the power amplifier unit with the maximum blocking current and provided with the No. 3 current acquisition device 131, namely, the phase is adjusted in advance. In practice, the phase of the power amplifier unit before being adjusted is advanced from the phases of the other two power amplifier units, so that the phase difference between the power amplifier unit and the other two power amplifier units is increased after the phase is adjusted, and the blocking current of the power amplifier unit is also increased. The third determining unit 124 determines that the blocking current of the power amplifier unit after the phase adjustment is larger than the blocking current before the phase adjustment, and the control unit 123 immediately controls the phase adjuster 140 to perform a reverse adjustment, i.e. a delay adjustment, on the phase of the power amplifier unit, so as to reduce the phase difference between the power amplifier units.
Fig. 2 shows a flowchart of a method for automatically controlling the phase of the radio frequency signal of the parallel operation system in the embodiment of the present application. Referring to fig. 2, the method comprises the steps of:
step 210: and judging whether the blocking zero point is larger than a preset value or not.
Step 220: if the blocking zero point is larger than the preset value, the phase adjuster 140 is controlled to adjust the phase of the power amplifier unit until the blocking zero point is smaller than the preset value.
In this application embodiment, all be provided with current collection device 131 in every power amplifier unit, gather the separation electric current of power amplifier unit, current collection device 131 can use current sensor now to gather separation electric current.
In some embodiments, step 220 further comprises the steps of:
step 221: the maximum blocking current was screened out of all blocking currents.
Step 222: and carrying out phase positive adjustment on the power amplification unit corresponding to the maximum blocking current.
Step 223: and judging whether the blocking current after phase adjustment is the minimum in all the blocking currents.
Step 224: and if the blocking current after the phase adjustment is the minimum in all the blocking currents, ending the phase adjustment of the power amplification unit.
It should be noted that step 221, step 222, step 223, and step 224 are not shown in the figure.
In some embodiments, step 224 further comprises: if the blocking current after the phase adjustment is not the minimum in all the blocking currents, the phase adjuster 140 is controlled to perform the phase adjustment on the power amplifying unit again.
In some embodiments, step 222 is followed by the steps of: judging whether the blocking current after the phase adjustment is larger than the blocking current before the phase adjustment; if yes, the phase adjuster 140 is controlled to perform phase reversal adjustment on the power amplification unit until the blocking current after the phase adjustment is smaller than the blocking current before the phase adjustment.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific implementation process of the described method may refer to the corresponding process in the foregoing system embodiment, and is not described herein again.
In an embodiment of the present application, an electronic device is provided, as shown in fig. 3, where the electronic device 300 shown in fig. 3 includes: a processor 301 and a memory 303. Wherein processor 301 is coupled to memory 303, such as via bus 302. Optionally, the electronic device 300 may also include a transceiver 304. It should be noted that the transceiver 304 is not limited to one in practical applications, and the structure of the electronic device 300 is not limited to the embodiment of the present application.
The Processor 301 may be a CPU (Central Processing Unit), a general-purpose Processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor 301 may also be a combination of computing functions, e.g., comprising one or more microprocessors, a combination of a DSP and a microprocessor, or the like.
The Memory 303 may be a ROM (Read Only Memory) or other type of static storage device that can store static information and instructions, a RAM (Random Access Memory) or other type of dynamic storage device that can store information and instructions, an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory) or other optical Disc storage, optical Disc storage (including Compact Disc, laser Disc, optical Disc, digital versatile Disc, blu-ray Disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to these.
The memory 303 is used for storing application program codes for executing the scheme of the application, and the processor 301 controls the execution. The processor 301 is configured to execute application program code stored in the memory 303 to implement the aspects illustrated in the foregoing method embodiments.
Among them, electronic devices include but are not limited to: mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and the like, and fixed terminals such as digital TVs, desktop computers, and the like. The electronic device shown in fig. 3 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present application.
As another aspect, the present application also provides a computer-readable storage medium, which may be included in the electronic device described in the above embodiments; or may be separate and not incorporated into the electronic device. The computer readable storage medium stores one or more programs which, when executed by one or more processors, perform the method for automatic phase control of radio frequency signals described herein.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the application referred to in the present application is not limited to the embodiments with a particular combination of the above-mentioned features, but also encompasses other embodiments with any combination of the above-mentioned features or their equivalents without departing from the spirit of the application. For example, the above features may be replaced with (but not limited to) features having similar functions as those described in this application.
Claims (10)
1. A radio frequency signal phase automatic control method of a parallel operation system, the parallel operation system comprises a plurality of power amplifier units, and the method is characterized by comprising the following steps:
judging whether an isolation zero point is larger than a preset value or not, wherein the isolation zero point is the sum of isolation currents of all the power amplification units;
and if so, controlling a phase adjuster to adjust the phase of the power amplification unit until the blocking zero point is smaller than the preset value, wherein the phase adjustment comprises phase positive adjustment and/or phase negative adjustment.
2. The method according to claim 1, wherein the adjusting the phase of the power amplifier unit comprises:
screening out the maximum blocking current from all the blocking currents;
performing phase positive adjustment on the power amplification unit corresponding to the maximum blocking current;
judging whether the blocking current after phase adjustment is the minimum in all the blocking currents or not;
if yes, the phase adjustment of the power amplification unit is finished.
3. The method according to claim 2, wherein the adjusting the phase of the power amplifier unit further comprises:
if not, controlling the phase adjuster to perform phase positive adjustment on the power amplification unit again.
4. The method according to claim 3, wherein the phase adjustment of the power amplifier unit further comprises:
judging whether the blocking current after the phase adjustment is larger than the blocking current before the phase adjustment;
if so, controlling the phase adjuster to perform phase reversal adjustment on the power amplification unit until the blocking current after the phase adjustment is smaller than the blocking current before the phase adjustment.
5. The method according to claim 1, wherein before determining whether the blocking zero is greater than a predetermined value, the method further comprises: and obtaining the blocking current of each power amplification unit.
6. The utility model provides a radio frequency signal phase place automatic control system of parallel operation system, parallel operation system includes a plurality of power amplifier units, its characterized in that includes:
the judging module is used for judging whether an isolation zero point is larger than a preset value, wherein the isolation zero point is the sum of isolation currents of all the power amplification units;
and the phase adjustment control module is used for controlling the phase adjuster to perform phase adjustment on the power amplification unit until the blocking zero point is smaller than the preset value when the blocking zero point is larger than the preset value, and the phase adjustment comprises phase positive adjustment and phase negative adjustment.
7. The system according to claim 6, wherein the phase adjustment control module is specifically configured to:
screening out the maximum blocking current from all the blocking currents;
performing phase positive adjustment on the power amplification unit corresponding to the maximum blocking current;
judging whether the blocking current after phase adjustment is the minimum in all the blocking currents or not;
if yes, the phase adjustment of the power amplification unit is finished.
8. The system according to claim 6, further comprising an obtaining module, wherein the obtaining module is configured to obtain the blocking current of each of the power amplifier units.
9. An electronic device comprising a memory and a processor, the memory having stored thereon a computer program, wherein the processor, when executing the program, implements the method of any of claims 1-5.
10. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, carries out the method according to any one of claims 1 to 5.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111316314.9A CN114124117A (en) | 2021-11-08 | 2021-11-08 | Radio frequency signal phase automatic control method and system of parallel operation system |
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| CN202111316314.9A CN114124117A (en) | 2021-11-08 | 2021-11-08 | Radio frequency signal phase automatic control method and system of parallel operation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203217314U (en) * | 2013-04-28 | 2013-09-25 | 华南理工大学 | Synchronous control device of three-phase UPS parallel operation system |
| CN103873076A (en) * | 2012-12-14 | 2014-06-18 | 北京北广科技股份有限公司 | High-power medium wave transmitter and parallel operation control method |
| CN111525610A (en) * | 2020-04-26 | 2020-08-11 | 深圳麦格米特电气股份有限公司 | Control method and device of photovoltaic inverter and photovoltaic inverter |
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2021
- 2021-11-08 CN CN202111316314.9A patent/CN114124117A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873076A (en) * | 2012-12-14 | 2014-06-18 | 北京北广科技股份有限公司 | High-power medium wave transmitter and parallel operation control method |
| CN203217314U (en) * | 2013-04-28 | 2013-09-25 | 华南理工大学 | Synchronous control device of three-phase UPS parallel operation system |
| CN111525610A (en) * | 2020-04-26 | 2020-08-11 | 深圳麦格米特电气股份有限公司 | Control method and device of photovoltaic inverter and photovoltaic inverter |
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Application publication date: 20220301 |