CN115765778A - Power control method and radio frequency transceiver - Google Patents
Power control method and radio frequency transceiver Download PDFInfo
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- CN115765778A CN115765778A CN202211410758.3A CN202211410758A CN115765778A CN 115765778 A CN115765778 A CN 115765778A CN 202211410758 A CN202211410758 A CN 202211410758A CN 115765778 A CN115765778 A CN 115765778A
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Abstract
The application provides a power control method and a radio frequency transceiver, and relates to the field of radio frequency. The power control method comprises the following steps: determining a difference between an output power of the radio frequency signal and a target power; the output power is the power of the radio frequency signal when the radio frequency signal is transmitted from the antenna of the radio frequency transceiver; and when the difference value exceeds a preset difference value range, adjusting the output power of the radio frequency signal. According to the method and the device, when the difference value exceeding the preset difference value range exists between the output power of the radio-frequency signal and the target power, the output power of the radio-frequency signal is adjusted, the output power can meet the expected target power, and therefore the accuracy of the radio-frequency signal sent by the radio-frequency transceiver is improved.
Description
Technical Field
The present application relates to the field of radio frequency, and in particular, to a power control method and a radio frequency transceiver.
Background
After being generated, the radio frequency signal of the radio frequency transceiver needs to be sent out through various circuit structures and devices, for example, the radio frequency signal passes through a power amplifier, an antenna and the like. However, due to various factors such as environment and device performance, the power of the rf signal emitted from the antenna is not consistent with the power of the rf signal generated, so that the power of the emitted rf signal deviates from the expected target power, which may affect the accuracy of the rf signal.
Disclosure of Invention
In view of the above, embodiments of the present disclosure provide a power control method and a radio frequency transceiver, so that the power of a radio frequency signal when transmitted satisfies a desired target power, thereby improving the accuracy of the radio frequency signal transmitted by the radio frequency transceiver.
In a first aspect, an embodiment of the present application provides a power control method, including: determining a difference between an output power of the radio frequency signal and a target power; the output power is the power of the radio frequency signal when the radio frequency signal is transmitted from the antenna of the radio frequency transceiver; and when the difference value exceeds a preset difference value range, adjusting the output power of the radio frequency signal.
In the embodiment of the application, the output power is the power when the radio frequency signal is sent from the antenna of the radio frequency transceiver, the target power is the power when the preset radio frequency signal is sent from the antenna, and when the difference between the output power of the radio frequency signal and the target power is determined and the difference is not within the preset range, the output power of the radio frequency signal can be determined to be not in accordance with the expectation, so that the output power of the radio frequency signal can be adjusted, and the accuracy of the radio frequency signal sent by the radio frequency transceiver is improved.
In one embodiment, adjusting the output power of the radio frequency signal comprises: adjusting the transmission power of the radio frequency signal; the transmission power is the power at which the radio frequency transceiver generates the radio frequency signal.
In the embodiment of the application, the performance of the circuit and the device between the generation position and the antenna position of the radio frequency transceiver is fixed, and the environment, the temperature and the like are not convenient to change, so that the power of the radio frequency signal during generation can be adjusted, the output power can be adjusted, and the accuracy of the output radio frequency signal is improved.
In one embodiment, the output power of the rf signal is: and calculating an attenuation signal, wherein the attenuation signal is obtained by attenuating the radio-frequency signal corresponding to the output power.
In the embodiment of the application, the radio frequency signal sent from the antenna is usually amplified by the power amplifier, and the radio frequency transceiver cannot directly receive and use the power signal sent from the antenna port, so that the radio frequency signal can be attenuated, and the radio frequency transceiver can receive and analyze the output power.
In one embodiment, the determining the difference between the output power of the radio frequency signal and the target power comprises: obtaining an output power detection value corresponding to the output power based on a preset power relation and the output power; the preset power relation comprises each power and a corresponding power detection value; determining a target power detection value based on the preset power relation and the target power; a difference between the target power detection value and the output power detection value is calculated.
In the embodiment of the application, the difference between the output power and the target power cannot be directly determined inside the radio frequency transceiver, so that the power detection values corresponding to the output power and the target power can be determined according to the preset power relation, and whether the power needs to be adjusted is judged according to the difference between the target power detection value and the output power detection value, so that the output power of the radio frequency signal meets the expectation.
In one embodiment, before determining the difference between the output power of the radio frequency signal and the target power, the method further comprises: acquiring a calibration log, wherein the calibration log comprises power and power detection values corresponding to historical radio frequency signals generated in the process of calibrating the radio frequency signals of the radio frequency transceiver in advance; establishing the preset power relationship based on the calibration log to determine a difference between the output power and the target power based on the preset power relationship.
In the embodiment of the application, after the calibration log is used for establishing the preset power relationship, the power and power detection values corresponding to the historical radio-frequency signals included in the calibration log can be output from the preset power relationship and the power detection values corresponding to the target power rapidly, and then the difference between the power and the target power can be calculated, so that the efficiency of calculating the difference between the output power and the target power can be improved.
In one embodiment, the obtaining the calibration log includes: adjusting the attenuation amount of an attenuator, wherein the attenuator is used for attenuating the radio-frequency signal sent by the transmitting end of the radio-frequency transceiver; and calibrating the transmitting end based on the adjusted attenuation amount to obtain the calibration log after the attenuation amount is adjusted.
In the embodiment of the application, the attenuator is adjusted and then calibrated, and the power detection values corresponding to the same power change, so that the attenuation can be properly adjusted to enlarge the difference value between the power detection values corresponding to the two powers, and therefore, the result of judging whether the power adjustment needs to be performed by using the difference value is more accurate, and the output power of the radio frequency signal during output is more accurate.
In one embodiment, after adjusting the output power of the radio frequency signal, the method further comprises: judging whether the difference value between the adjusted output power and the target power exceeds the preset difference value range or not; if so, readjusting the output power of the radio frequency signal, and repeating the judging operation; if not, the adjustment of the output power of the radio frequency signal is finished.
In the embodiment of the application, when the difference between the output power of the adjusted radio frequency signal and the target power is determined to be still beyond the preset difference range, the output power of the radio frequency signal is readjusted and the judgment operation is repeated until the difference is within the range, and the adjustment of the output power is finished, so that the difference between the output power of the radio frequency signal and the target power can be reduced by adjusting for many times, the output power is closer to the target power, and the radio frequency signal is more accurate.
In a second aspect, an embodiment of the present application provides a radio frequency transceiver, including: a radio frequency transceiver body for emitting a radio frequency signal; the signal acquisition module is connected with the radio frequency transceiver body and used for acquiring the output power of the radio frequency signal sent by the radio frequency transceiver; the radio frequency transceiver body is further configured to perform the method of any of the first aspects.
In one embodiment, the radio frequency transceiver body comprises a signal monitoring end and a transmitting end; the signal acquisition module includes: the coupler is connected with the transmitting end; and the attenuator is connected between the coupler and the signal monitoring end.
In one embodiment, the attenuation of the attenuator is adjustable.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a block diagram of a conventional rf transceiver provided in the present application;
fig. 2 is a flowchart of a power control method according to an embodiment of the present application;
fig. 3 is a block diagram of an rf transceiver according to an embodiment of the present disclosure.
Icon: a radio frequency transceiver 100; a radio frequency transceiver body 110; a transmitting end 111; a signal monitoring terminal 112; a power amplifier 113; a signal acquisition module 120; a coupler 121; an attenuator 122; an antenna 300.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
To facilitate an understanding of the present solution, a radio frequency transceiver will be described before the present solution is formally introduced.
Referring to fig. 1, fig. 1 is a block diagram of a conventional rf transceiver according to an embodiment of the present invention. The radio frequency transceiver comprises a transmitting end and a signal monitoring end, wherein the transmitting end can generate a radio frequency signal, and the radio frequency signal is amplified by a power amplifier and then transmitted from an antenna.
The radio-frequency signal generated by the transmitting end is amplified by the power amplifier and then transmitted from the antenna, the radio-frequency signal is influenced by various factors such as environment, temperature, device performance and the like, and the power of the radio-frequency signal may deviate from the transmitting end to the antenna, so that the output power of the radio-frequency signal transmitted from the antenna is inconsistent with the expected target power, and the accuracy of the radio-frequency signal is influenced.
In order to solve the problem that the output power of the radio frequency signal is inconsistent with the target power, the application provides a power control method. Referring to fig. 2, fig. 2 is a flowchart of a power control method applied to a radio frequency transceiver according to an embodiment of the present application, including:
and S110, determining the difference value between the output power of the radio frequency signal and the target power.
Wherein, the output power is the power when the radio frequency signal is sent from the antenna of the radio frequency transceiver; the target power is the power of the desired radio frequency signal.
Before determining the difference between the output power of the radio frequency signal and the target power, the radio frequency signal output at the antenna port can be obtained, and then the output power corresponding to the radio frequency signal is analyzed.
In an alternative embodiment, a coupler may be connected to the antenna, an input end of the coupler is connected to a power amplifier of the radio frequency transceiver, a through end of the coupler is connected to the antenna, and a coupling end of the coupler is connected to a signal monitoring end of the radio frequency transceiver for detecting the radio frequency signal, so as to analyze the radio frequency signal and obtain an output power corresponding to the radio frequency signal.
After passing through the power amplifier, the radio frequency signal cannot directly enter the radio frequency transceiver to use the signal monitoring end, so that an attenuator can be connected between the signal monitoring end and the coupler coupling end to attenuate the radio frequency signal. Therefore, the output power of the radio frequency signal may also be calculated as an attenuated signal, where the attenuated signal is a signal obtained by attenuating the radio frequency signal corresponding to the output power.
After the output power is obtained, a difference between the output power and the target power may be determined.
In one embodiment, determining a difference between an output power of the radio frequency signal and a target power comprises: obtaining an output power detection value corresponding to the output power based on a preset power relation and the output power; determining a target power detection value based on a preset power relation and the target power; a difference between the target power detection value and the output power detection value is calculated. The preset power relationship comprises each power and a corresponding power detection value.
In this embodiment, in the radio frequency transceiver, when determining whether the output power of the radio frequency signal is accurate, an RGI (RF Gain Index) value corresponding to the power may be determined first, and then a power detection value corresponding to the RGI value may be determined, so as to perform the determination through a difference between the power detection values.
In some embodiments, a first relation table between the power and the RGI value and a second relation table between the RGI value and the power detection value may be stored inside the radio frequency transceiver, and a target power detection value corresponding to the target power and an output power detection value corresponding to the output power may be determined through the first relation table and the second relation table. In another embodiment, a third relation table of the relation between the power, the RGI value and the power detection value may also exist inside the radio frequency transceiver, and after the output power or the target power is obtained, the corresponding output power detection value or the target power detection value may be directly determined through the third relation table. In addition, a fourth relation table of direct relation between the power and the power detection value can be stored in the radio frequency transceiver, and the power detection value corresponding to the power can be directly determined through the fourth relation table.
Thus, it is possible to calculate the difference between the target power detection value and the output power detection value, and determine whether the output power is accurate, that is, whether the desired target power is satisfied, from the difference. Illustratively, at an output power of 27dBm, the corresponding output RGI value is 1 and the corresponding output power detection value is 1000. The target power is 26dBm, the corresponding target RGI value is 2, the corresponding target power detection value is 3000, correspondingly, the difference value between the target power detection value and the output power detection value is 2000, and in the subsequent process, whether the difference value 2000 is within the preset difference value range can be judged, so that whether the output power is adjusted or not can be judged.
In some embodiments, the predetermined power relationship is established based on performance parameters of the radio frequency transceiver. Therefore, before determining the difference between the output power of the rf signal and the target power, a preset power relationship may be established, and the process of establishing the preset power relationship includes: acquiring a calibration log, wherein the calibration log comprises power and power detection values corresponding to various historical radio frequency signals generated in the process of calibrating the radio frequency signals of a radio frequency transceiver in advance; a preset power relationship is established based on the calibration log to determine a difference between the output power and the target power based on the preset power relationship.
In this embodiment, radio frequency signals of various powers are used for debugging when the radio frequency transceiver is calibrated, in this embodiment, the radio frequency signals used in the calibration process are referred to as historical radio frequency signals, and a calibration log including a power, an RGI value, and a power detection value corresponding to each historical radio frequency signal can be obtained after calibration. For the calibration process of the radio frequency transceiver, reference may be made to the prior art, which is not described herein again.
For example, after the calibration log is obtained, the power and the corresponding RGI value in the calibration log may be obtained to establish a first relation table, and then the RGI value and the corresponding power detection value may be obtained to establish a second relation table. And acquiring the power, the RGI and the power detection value corresponding to each other to establish a third relation table. And a fourth relation table between the power and the power detection value can be directly established after the power, the RGI and the power detection value which correspond to each other are obtained.
In one embodiment, during calibration, the attenuation amount of the attenuator may be adjusted, and the transmitting end is calibrated based on the attenuator with the adjusted attenuation amount, so as to obtain a calibration log with the adjusted attenuation amount.
In this embodiment, when the attenuator is used to adjust the radio frequency transceiver, the attenuation of the attenuator may be adjusted. When the radio frequency transceiver is calibrated after the attenuation of the attenuator is reduced, the value of the power detection value corresponding to the RGI changes in the calibration log compared with the value before adjustment, which shows that the power detection value corresponding to the same RGI changes, so that the difference value between the power detection values corresponding to different RGIs is increased, and therefore, the difference value between the output power and the target power changes, and the difference value is more obvious. Illustratively, when the output power is 27dBm before the attenuation is adjusted, the corresponding output RGI value is 1, and the corresponding detected output power value is 1000. The target power is 26dBm, the corresponding target RGI value is 2, and the corresponding target power detection value is 3000. The difference between the target power detection value and the output power detection value is 2000. After the attenuation is reduced, for example, when the output power is 27dBm, the corresponding output RGI value is 1, and the corresponding output power detection value is 1000. The target power is 26dBm, the corresponding target RGI value is 2, and the corresponding target power detection value is 4500. The difference between the target power detection value and the output power detection value is 3500.
And S120, when the difference value exceeds a preset difference value range, adjusting the output power of the radio frequency signal.
In this embodiment, after the difference is determined, the difference may be compared with a preset difference range, so as to determine whether the output power of the radio frequency signal needs to be adjusted. If the difference is not within the preset difference range, the transmitting power of the radio frequency transceiver is adjusted, and if the difference is within the preset difference range, the output power is determined to be close to or consistent with the target power, and the transmitting power corresponding to the output power is used as the transmitting power of the radio frequency transceiver for subsequent radio frequency signals.
In one embodiment, adjusting the output power may be accomplished by adjusting the transmit power of the rf signal.
In this embodiment, the transmission power is the power when the radio frequency transceiver generates the radio frequency signal. In the radio frequency transceiver, because the gain of the power amplifier is determined by the device and is a fixed value, the gain is not convenient to adjust, and the coupling degree and the insertion loss of the coupler are also fixed, the adjustment of the output power can be realized by adjusting the transmitting power of the radio frequency transceiver.
In some embodiments, the gain factor of the power amplifier may also be adjusted in other ways. For example, the power amplifier may be a gain-adjustable power amplifier, or a plurality of power amplifiers with different gains may be provided, and when the output power needs to be adjusted, one of the power amplifiers is selected to be connected to the antenna and the radio frequency transceiver, respectively.
In one embodiment, whether the difference between the adjusted output power and the target power exceeds a preset difference range is judged; if yes, readjusting the output power of the radio frequency signal, and repeating the judging operation; if not, the adjustment of the output power of the radio frequency signal is finished.
In this embodiment, if the difference is not within the preset difference range and the transmission power is adjusted, the steps S110 to S120 may be performed based on the adjusted transmission power until the output power of the radio frequency signal is within the preset difference range, and then the adjustment of the output power of the radio frequency signal is finished.
In the embodiment of the application, the output power is the power when the radio frequency signal is sent from the antenna of the radio frequency transceiver, the target power is the power when the preset radio frequency signal is sent from the antenna, and when the difference between the output power of the radio frequency signal and the target power is determined and the difference is not within the preset range, the output power of the radio frequency signal can be determined to be not in accordance with the expectation, so that the output power of the radio frequency signal can be adjusted, and the accuracy of the radio frequency signal sent by the radio frequency transceiver is improved.
Referring to fig. 3, fig. 3 is a block diagram of an rf transceiver according to an embodiment of the present disclosure.
Based on the same inventive concept, the embodiment of the present application provides a radio frequency transceiver 100, including: radio frequency transceiver body 110, signal acquisition module 120.
The radio frequency transceiver body 110 is configured to emit a radio frequency signal.
The radio frequency transceiver body 110 includes a transmitting end 111, a signal monitoring end 112, a power amplifier 113 and an antenna 300.
The transmitting end 111 is connected to a power amplifier 113, and the power amplifier 113 is connected to an antenna 300. The transmitting end 111 may generate a radio frequency signal inside and transmit the radio frequency signal with a certain power, and the radio frequency signal is amplified by the power amplifier 113 and then transmitted from the antenna 300 to the outside.
The signal monitoring terminal 112 is connected to the antenna 300, and is used for acquiring radio frequency signals received from the outside from the antenna 300.
It is understood that the specific structure of the rf transceiver body 110 can be referred to an existing rf transceiver, and will not be described herein.
The signal obtaining module 120 includes a coupler 121 and an attenuator 122, the coupler 121 is connected to the transmitting terminal 111, and the attenuator 122 is connected between the coupler 121 and the signal monitoring terminal 112. The input end of the coupler 121 is connected to the transmitting end 111, the through end of the coupler 121 is connected to the antenna 300, and the coupling end of the coupler 121 is connected to the attenuator 122. For the specific structure of the attenuator 122, reference may be made to the prior art, for example, a pi-type attenuation network, an attenuation resistor, or other devices with an attenuation function for radio frequency signals, which are not described herein again.
In one embodiment, the attenuation of the attenuator 122 is adjustable.
In the present embodiment, the attenuator 122 can adjust the attenuation amount, so that the attenuation amount of the attenuator 122 can be adjusted to a desired attenuation amount as needed.
In another embodiment, the attenuation of the attenuator 122, if not adjustable, may be adjusted by way of the attenuator 122.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A power control method, applied to a radio frequency transceiver, comprising:
determining a difference between an output power of the radio frequency signal and a target power; the output power is the power of the radio frequency signal when the radio frequency signal is transmitted from the antenna of the radio frequency transceiver;
and when the difference value exceeds a preset difference value range, adjusting the output power of the radio frequency signal.
2. The method of claim 1, wherein adjusting the output power of the radio frequency signal comprises:
adjusting the transmission power of the radio frequency signal; the transmission power is the power at which the radio frequency transceiver generates the radio frequency signal.
3. The method of claim 1, wherein the output power of the radio frequency signal is: and calculating an attenuation signal, wherein the attenuation signal is obtained by attenuating the radio-frequency signal corresponding to the output power.
4. The method of claim 1, wherein determining the difference between the output power of the radio frequency signal and the target power comprises:
obtaining an output power detection value corresponding to the output power based on a preset power relation and the output power; the preset power relation comprises each power and a corresponding power detection value;
determining a target power detection value based on the preset power relation and the target power;
a difference between the target power detection value and the output power detection value is calculated.
5. The method of claim 4, wherein prior to said determining the difference between the output power of the radio frequency signal and the target power, the method further comprises:
acquiring a calibration log, wherein the calibration log comprises power and power detection values corresponding to historical radio frequency signals generated in the process of calibrating the radio frequency signals of the radio frequency transceiver in advance;
establishing the preset power relationship based on the calibration log to determine a difference between the output power and the target power based on the preset power relationship.
6. The method of claim 5, wherein obtaining the calibration log comprises:
adjusting the attenuation amount of an attenuator, wherein the attenuator is used for attenuating the radio-frequency signal sent by the transmitting end of the radio-frequency transceiver;
and calibrating the transmitting end based on the adjusted attenuation amount to obtain the calibration log after the attenuation amount is adjusted.
7. The method of any of claims 1-6, wherein after adjusting the output power of the radio frequency signal, the method further comprises:
judging whether the difference value between the adjusted output power and the target power exceeds the preset difference value range or not;
if so, readjusting the output power of the radio frequency signal, and repeating the judging operation;
if not, the adjustment of the output power of the radio frequency signal is finished.
8. A radio frequency transceiver, comprising:
a radio frequency transceiver body for emitting a radio frequency signal;
the signal acquisition module is connected with the radio frequency transceiver body and used for acquiring the output power of the radio frequency signal sent by the radio frequency transceiver;
the radio frequency transceiver body is further configured to perform the method of any of claims 1-7.
9. The radio frequency transceiver of claim 8, wherein the radio frequency transceiver body comprises a signal monitoring terminal and a transmitting terminal; the signal acquisition module includes:
the coupler is connected with the transmitting end;
and the attenuator is connected between the coupler and the signal monitoring end.
10. The radio frequency transceiver of claim 9, wherein the attenuator has an adjustable attenuation.
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| CN117119570A (en) * | 2023-04-26 | 2023-11-24 | 荣耀终端有限公司 | Radio frequency power control method, module and terminal equipment |
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| CN117119570A (en) * | 2023-04-26 | 2023-11-24 | 荣耀终端有限公司 | Radio frequency power control method, module and terminal equipment |
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