CN106604302B - Power calibration method of terminal - Google Patents
Power calibration method of terminal Download PDFInfo
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- CN106604302B CN106604302B CN201611069064.2A CN201611069064A CN106604302B CN 106604302 B CN106604302 B CN 106604302B CN 201611069064 A CN201611069064 A CN 201611069064A CN 106604302 B CN106604302 B CN 106604302B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
Abstract
The invention discloses a power calibration method of a terminal. The method comprises the following steps: calculating a reference power point for power calibration; judging whether the power interval of the power amplifier, in which the reference power point falls, is a low gain mode interval; if so, changing configuration parameters to enable the reference power point to fall into a high gain mode interval of the power amplifier; and performing power calibration based on the reference power point. The method can improve the accuracy of the terminal power calibration, and is simple and easy to implement.
Description
Technical Field
The invention relates to the technical field of calibration, in particular to a power calibration method of a terminal.
Background
One terminal is often composed of hundreds of components, but even the same batch of components have deviation, and the deviation can cause the power parameter of the terminal to be not up to the national standard requirement, so the power parameter of the terminal needs to be adjusted within the national standard requirement range by using a power calibration method.
In the practical use of the terminal, the excessive calibration power may cause other radio frequency indexes (such as adjacent channel power leakage ratio, error vector magnitude, and the like) of the terminal not to reach the standard, and if the power calibration is too small, the terminal may not obtain a base station signal in a weak signal environment, which seriously affects the normal operation of the terminal. Therefore, how to improve the power calibration accuracy of the terminal is an urgent problem to be solved in the technical field of power calibration.
Disclosure of Invention
The invention mainly solves the technical problem of providing a power calibration method of a terminal so as to improve the accuracy of power calibration of the terminal.
In order to solve the above technical problem, the present invention provides a power calibration method for a terminal, including: calculating a reference power point for power calibration; judging whether the power interval of the power amplifier, in which the reference power point falls, is a low gain mode interval; if so, changing the configuration parameters to enable the reference power point to fall into a high gain mode interval of the power amplifier; and performing power calibration based on the reference power point.
Wherein the step of calculating a reference power point for power calibration includes: acquiring a switching point for controlling transmission power from a calibration file of a terminal; the reference power point is calculated based on the switching point.
Wherein, the step of determining whether the power interval of the power amplifier in which the reference power point falls is a low gain mode interval comprises: acquiring a plurality of interval division points for dividing the power intervals and a mode identifier for indicating a gain mode of each power interval from a calibration file of the terminal; and judging the power interval in which the reference power point falls according to the reference power point and the interval division point, and judging whether the power interval in which the reference power point falls is a low gain mode interval or not according to the mode identifier corresponding to the power interval in which the reference power point falls.
Wherein the step of changing the configuration parameters to make the reference power point fall into the high gain mode interval of the power amplifier comprises: and modifying the calibration file of the terminal so that the reference power point falls into the high gain mode interval of the power amplifier.
Wherein, the step of modifying the calibration file of the terminal to make the reference power point fall into the high gain mode interval of the power amplifier comprises: the interval division point is modified so that the reference power point falls within the high gain mode interval of the power amplifier.
Wherein, the step of modifying the calibration file of the terminal to make the reference power point fall into the high gain mode interval of the power amplifier comprises: modifying the mode identification of the power interval in which the reference power point falls so that the reference power point falls in the high gain mode interval of the power amplifier.
Wherein the step of changing the configuration parameters to make the reference power point fall into the high gain mode interval of the power amplifier comprises: and modifying an interface drive file of the terminal so that the reference power point falls into a high gain mode interval of the power amplifier.
Wherein, the step of modifying the interface driver file of the terminal to make the reference power point fall into the high gain mode interval of the power amplifier comprises: the contents of a register for controlling the gain mode of the power amplifier are modified so that the reference power point falls within the high gain mode interval of the power amplifier.
Wherein, the step of changing the configuration parameters to make the reference power point fall into the high gain mode interval of the power amplifier comprises: and changing the configuration parameters so that the power interval in which the reference power point falls and the power interval larger than the reference power point are both the high gain mode intervals of the power amplifier.
Wherein, the step of performing power calibration based on the reference power point comprises: and performing power calibration on other power intervals according to the calibration result of the reference power point.
The invention has the beneficial effects that: different from the prior art, the power calibration method of the terminal firstly calculates and obtains a reference power point of the power amplifier, if the power interval in which the reference power point is located is the low gain mode interval of the power amplifier, the reference power point is enabled to fall into the high gain mode interval of the power amplifier by modifying the configuration parameters, and then the power of the power amplifier is calibrated based on the reference power point. The method can solve the problem that the power amplifier reduces the calibration precision when the power falling into the power interval with the high gain mode interval is calibrated because the power interval in which the reference power point falls is the low gain mode interval. Because the power amplifier has a nonlinear characteristic, different power intervals from low power to high power require different gain modes, and the gain of the high gain mode interval is greater than that of the low gain mode interval, when the reference power point falls into the low gain mode area, and the power falling into the high gain mode area is calibrated, deviation is generated, the deviation is increased due to the large gain of the high gain mode area, and the calibration precision is obviously reduced.
Drawings
Fig. 1 is a flowchart illustrating a power calibration method of a terminal according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a flowchart illustrating a power calibration method of a terminal according to the present invention. The embodiment comprises the following steps:
s11: a reference power point for power calibration is calculated.
Optionally, in this embodiment, first, a switching point for controlling transmission power is obtained from a calibration file of the terminal; the reference power point is then calculated from the switching point.
In an application scenario, the switching points of the transmission power control of the embodiment include a first switching point and a second switching point, which respectively correspond to a power minimum point and a power maximum point of a power high gain mode interval of the power amplifier. The first switching point includes a first rising switching point and a first falling switching point, and the second switching point includes a second rising switching point and a second falling switching point. In another application scenario, in order to improve the sensitivity of the power amplifier to switch between different gain mode intervals, the first rising switching point and the first falling switching point, and the second rising switching point and the second falling switching point may be set to the same value, respectively. In other application scenarios, in order to prevent the power amplifier from being frequently switched between different gain mode intervals, a certain power difference value may be set between the first rising switching point and the first falling switching point, and between the second rising switching point and the second falling switching point, and the magnitude of the power difference value may be set according to the specific requirements of power calibration.
In one application scenario, the present embodiment uses the absolute value of the calculation result of the formula (second rising switching point-first rising switching point + second falling switching point-first falling switching point)/4 as the reference power point. Of course, in other application scenarios, other algorithms may be employed in place of this formula.
S12: and judging whether the power interval of the power amplifier in which the reference power point falls is a low gain mode interval or not. If so, go to step S13, otherwise go to step S14.
Alternatively, in this embodiment, first, a plurality of interval division points for dividing the power interval and a mode identifier for indicating a gain mode of each power interval are obtained from a calibration file of the terminal, then the power interval in which the reference power point falls is determined according to the reference power point and the interval division points, and whether the power interval in which the reference power point falls is the low gain mode interval is determined according to the mode identifier corresponding to the power interval in which the reference power point falls.
In one application scenario, the power gain modes of the power amplifier are divided into a high gain mode and a low gain mode, and the corresponding mode identifications are H, L respectively. In other application scenarios, the power gain modes are divided into a high gain mode, a medium gain mode and a low gain mode, and the corresponding mode identifications are H, M, L respectively.
It should be noted that the power gain mode and the power interval have a one-to-one or one-to-many relationship.
S13: the configuration parameters are changed so that the reference power point falls within the high gain mode interval of the power amplifier.
Alternatively, the embodiment may modify the calibration file of the terminal so that the reference power point falls within the high gain mode interval of the power amplifier.
Specifically, the present embodiment may modify the interval division point such that the reference power point falls within the high gain mode interval of the power amplifier, i.e., by lowering the division point of the high gain mode interval and the low gain mode interval below the reference power point. In this embodiment, the mode identifier of the power interval in which the reference power point falls may also be modified, so that the reference power point falls into the high gain mode interval of the power amplifier, that is, the mode identifier L of the power interval in which the reference power point falls is modified to H.
Optionally, the embodiment may further modify an interface driver file of the terminal, so that the reference power point falls into a high gain mode interval of the power amplifier.
Specifically, the present embodiment may modify the content of the register for controlling the gain mode of the power amplifier in the interface driver file, so that the reference power point falls within the high gain mode interval of the power amplifier.
Optionally, in this embodiment, the configuration parameters may be changed, so that the power interval in which the reference power point falls and the power interval greater than the reference power point are both the high gain mode intervals of the power amplifier, so as to ensure that the reference power point and all the power points greater than the reference power point fall into the high gain mode intervals.
S14: and performing power calibration based on the reference power point.
Optionally, the embodiment further performs power calibration on other power intervals according to the calibration result of the reference power point.
In an application scenario, the embodiment calibrates other power intervals based on the reference power point by using a reference power fitting algorithm. Of course, different calibration platforms, different terminals, different reference channels, and different models of power amplifiers may use different algorithms instead of the reference power fitting algorithm.
Different from the prior art, the power calibration method of the terminal firstly calculates and obtains a reference power point of the power amplifier, if the power interval in which the reference power point is located is the low gain mode interval of the power amplifier, the reference power point is enabled to fall into the high gain mode interval of the power amplifier by modifying the configuration parameters, and then the power of the power amplifier is calibrated based on the reference power point. The method can solve the problem that the power amplifier reduces the calibration precision when the power falling into the power interval with the high gain mode interval is calibrated because the power interval in which the reference power point falls is the low gain mode interval. Because the power amplifier has a nonlinear characteristic, different power intervals from low power to high power require different gain modes, and the gain of the high gain mode interval is greater than that of the low gain mode interval, when the reference power point falls into the low gain mode area, and the power falling into the high gain mode area is calibrated, deviation is generated, the deviation is increased due to the large gain of the high gain mode area, and the calibration precision is obviously reduced.
Different from the prior art, the configuration parameters can be modified by modifying the calibration file or the interface drive file of the terminal so that the reference power point falls into the high gain mode interval of the power amplifier, and the accuracy of the terminal power calibration is improved.
To more clearly illustrate the power calibration method of the terminal in this embodiment, the following describes a power calibration process of the terminal in the WCDMA communication mode in combination with a concurrent transmission technology (MTK) fourth generation communication technology (4G) platform power calibration file and a Mobile Industry Processor Interface (MIPI) driver file corresponding to the platform power calibration file.
Further, in the MTK 4G platform power calibration file, Start1 ═ 12 and End1 ═ 12 define an up transition point and a down transition point of the transmission power transition point 1, respectively, Start2 ═ 24 and End2 ═ 24 define an up transition point and a down transition point of the transmission power transition point 2, respectively (where the transition points 1 and 2 correspond to the power minimum point and the power maximum point of the power high gain region, respectively); PA octreel Sections 8 defines that the power amplifier has 8 power intervals from high to low; the PAOCTLEVEL PMU LEVEL PA Mode is defined as H, H, H, H, H, H, L, L, which defines the Mode identifier corresponding to each power interval (H is high gain Mode, L is low gain Mode); PA octreevel PMU Level Prf 24,22,20,16,14,10,6,1 defines the division point of the above-mentioned 8 power intervals, respectively.
Further, the transmission power control code MIPI _ PA, {12,13}, MIPI _ TPC _ SET, US2CHIPCNT (20) } in the content of the MIPI driver file defines a transmission power control event 6 of the terminal in the WCDMA communication mode, where the event 6 corresponds to the penultimate power interval and the penultimate mode flag L of the 8 power intervals. The specific data codes { MIPI _ PA, UL1_ MIPI _ port, REG _ W, MUPI _ USID _ PA2, { {19224, {0x00,0x4F } }, {19362, {0x00,0x4F } }, {19500, {0x00,0x4F } }, {19638, {0x00,0x4F } } corresponding to event 6 define the contents of the 00 register and the 01 register, the 00 register contents are mainly used to set the gain modes of the power amplifier signal output port and the power amplifier, the content 4D of the 00 register indicates a high gain mode, and 4F indicates a low gain mode; the 01 register is mainly used for setting the static operating point of the power amplifier, and the static operating points of different power intervals of the power amplifier are different.
First, a reference power point is calculated: as a result of analysis, the reference power P is (Start2-Start1+ End2-End1)/4 is (24-12+24-12)/4 is 6dBm (since the rising transition point is greater than the falling transition point, P is positive and equal to the absolute value of P).
Next, it is determined whether the power interval of the power amplifier in which the reference power point 6dBm falls is the low gain mode interval, and as can be seen from the above definition, the power point 6dBm is located at the dividing point of the penultimate power interval, and the mode identifier of the penultimate power interval is L (the mode identifiers of the penultimate power interval and the penultimate power interval dividing point are set in the MIPI drive file and the mode identifier of the penultimate power interval are the same as the mode identifier of the penultimate power interval), so that it is determined that the power interval in which the reference power point 6dBm falls is the low gain mode interval.
Then, the configuration parameters may be changed by decreasing the division point 6dBm between the high gain mode interval and the low gain interval in the PA OCTLEVEL pmulevel Prf to 6dBm or less, for example, 5dBm, i.e., PA OCTLEVEL pmulevel Prf is 24,22,20,16,14,10,5, 1. Thus, the reference power point 6dBm falls into the power interval with the mode mark being H, and the reference power point 6dBm is in the high-gain mode interval; or directly modifying the Mode identifier L of the power interval in which the reference power point 6dBm falls into H, namely obtaining that the PAOCTLEVEL PMU Level PA Mode is H, H, H, H, H, H, H, L, so that the reference power point 6dBm falls into the high-gain Mode interval.
From the above analysis, it can also be seen that the reference power point 6dBm falls into the high-gain mode interval by changing the low-gain mode flag L corresponding to the penultimate power interval into the high-gain mode flag H corresponding to the penultimate power interval into which the reference power point 6dBm falls, by setting the content 0x4F of the 00 register in the specific data code corresponding to event 6 to 0x4D, { MIPI _ PA, UL1_ MIPI _ port, REG _ W, MUPI _ USID _ PA2, { {19224{0x00,0x4D } }, {19362, {0x00,0x4D } }, {19500, {0x00,0x4D } }, {19638, {0x00,0x4D } }.
In this embodiment, the configuration parameters are modified to make the reference power point 6dBm fall into the high gain mode interval, so as to improve the calibration accuracy of the reference power point 6dBm for calibrating the power falling into the high gain mode interval.
For different calibration platforms, different calibration terminals, and different power amplifiers, differences exist in power calibration files, interface driver files, and corresponding algorithms, but the power calibration method of this embodiment is applicable.
In this embodiment, the terminal may be, but is not limited to, a mobile phone, a notebook, and a tablet.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A method for calibrating power of a terminal, the method comprising:
calculating a reference power point for power calibration;
judging whether the power interval of the power amplifier, in which the reference power point falls, is a low gain mode interval;
if so, modifying a calibration file of the terminal or an interface drive file of the terminal so as to enable the reference power point to fall into a high gain mode interval of the power amplifier;
performing power calibration based on the reference power point;
the step of calculating a reference power point for power calibration includes:
acquiring a switching point for controlling transmission power from a calibration file of the terminal;
and calculating the reference power point according to the switching point.
2. The method of claim 1, wherein the step of determining whether the power interval of the power amplifier in which the reference power point falls is a low gain mode interval comprises:
acquiring a plurality of interval dividing points for dividing the power intervals and a mode identifier for indicating a gain mode of each of the power intervals from a calibration file of the terminal;
and judging the power interval in which the reference power point falls according to the reference power point and the interval dividing point, and judging whether the power interval in which the reference power point falls is a low gain mode interval or not according to a mode identifier corresponding to the power interval in which the reference power point falls.
3. The method of claim 2, wherein the step of modifying the calibration file of the terminal so that the reference power point falls within a high gain mode interval of the power amplifier comprises:
modifying the interval division point such that the reference power point falls within a high gain mode interval of the power amplifier.
4. The method of claim 2, wherein the step of modifying the calibration file of the terminal so that the reference power point falls within a high gain mode interval of the power amplifier comprises:
modifying the mode identification of the power interval in which the reference power point falls so that the reference power point falls in the high gain mode interval of the power amplifier.
5. The method of claim 1, wherein the step of modifying the interface driver file of the terminal so that the reference power point falls within a high gain mode interval of the power amplifier comprises:
modifying contents of a register for controlling a gain mode of the power amplifier to cause the reference power point to fall within a high gain mode interval of the power amplifier.
6. The method according to claim 1, wherein the step of modifying the calibration file of the terminal or the interface driver file of the terminal so that the reference power point falls within the high gain mode interval of the power amplifier comprises:
and modifying the calibration file of the terminal or the interface drive file of the terminal so that the power interval in which the reference power point falls and the power interval larger than the reference power point are both the high gain mode interval of the power amplifier.
7. The method of claim 1, wherein the step of performing power calibration based on the reference power point comprises:
and performing power calibration on other power intervals according to the calibration result of the reference power point.
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