WO2019101012A1

WO2019101012A1 - Method and device for power calibration, and computer readable storage device

Info

Publication number: WO2019101012A1
Application number: PCT/CN2018/115901
Authority: WO
Inventors: 张生; 胡志强
Original assignee: 捷开通讯(深圳)有限公司
Priority date: 2017-11-27
Filing date: 2018-11-16
Publication date: 2019-05-31
Also published as: CN108184009B; CN108184009A

Abstract

A method and device for power calibration, and a computer readable storage device, the method comprising: sampling the actual emission power of a smart terminal within a preset calibration point range according to a preset frequency, and acquiring an original sample point having the lowest power from among a plurality of sampled original sample points; according to the original sample point having the lowest power, determining the smallest calibration point, and performing sampling again by using the smallest calibration point as reference; acquiring a preset number of new sample points of which the power is less than the power of the smallest calibration point so as to determine an actual power calibration function.

Description

Power calibration method and device, computer readable storage device

The present application claims priority to Chinese Patent Application No. 200911210066.3, entitled "Power Calibration Method and Apparatus, Computer Readable Storage Device", filed on November 27, 2017, the entire contents of which are incorporated by reference. In this application.

Technical field

The present application relates to the field of communications, and in particular, to a power calibration method and apparatus, and a computer readable storage device.

Background technique

At the current stage of mobile phone R&D and debugging, the META (for testing, calibration, and debugging of mobile phones) tools provided by MTK (MediaTek.Inc) is generally used to calibrate the mobile phone, and the RF parameters of the mobile phone are calibrated to the standard range. Go over and check other performance indicators. If the calibration of the mobile phone is not accurate, it is easy to cause the power of the mobile phone to be too large, the frequency phase error is poor, the call cannot be performed normally, or the GPS positioning is inaccurate.

technical problem

The embodiment of the present application provides a power calibration method and device, and a computer readable storage device, which reduces the error of power calibration of a small power communication device by reducing the distance between the minimum calibration point and the minimum DAC value sampling point.

Technical solution

In a first aspect, an embodiment of the present application provides a power calibration method, including: sampling an actual transmit power of a smart terminal according to a predetermined frequency within a range of a set calibration point, obtaining a plurality of original sampling points, and obtaining the plurality of original sampling points. Obtaining a minimum power original sampling point in the original sampling point; determining a minimum calibration point according to the minimum power original sampling point; wherein a difference between a power of the minimum calibration point and the minimum power original sampling point is less than a preset threshold; The minimum calibration point is a reference for sampling the actual transmit power of the smart terminal again; acquiring a set number of new sample points smaller than the minimum calibration point power, and determining the actual number according to the set number of new sample points Power calibration function.

Determining a minimum calibration point according to the minimum power original sampling point, comprising: obtaining a calibration point that is smaller than a power of the minimum power original sampling point by less than the preset threshold; determining and the minimum power original The power point at which the power difference of the sampling point is the smallest is the minimum calibration point.

The sampling the actual transmit power of the smart terminal according to the predetermined frequency within the set calibration point to obtain a plurality of original sampling points, including: the actual transmit power of the smart terminal according to the predetermined frequency within the set calibration point range The corresponding digital-to-analog conversion DAC value is sampled to obtain a plurality of original sampling points including the digital-to-analog conversion DAC value.

The sampling the actual transmit power of the smart terminal according to the predetermined frequency within the range of the set calibration point, and obtaining a plurality of original sampling points, including: performing logarithmic sampling in a predetermined frequency range within a set calibration point range The actual transmit power of the intelligent terminal is sampled to obtain a plurality of original sampling points.

Wherein, the actual transmit power of the smart terminal is sampled according to a predetermined frequency within a range of the set calibration point, and a plurality of original sampling points are obtained, including: using a mean sampling method to match the smart wave according to a predetermined frequency within a set calibration point range The actual transmit power of the terminal is sampled to obtain a plurality of original sampling points.

The obtaining a new sampling point that is less than the set number of the minimum calibration point power, and determining an actual power calibration function according to the set number of new sampling points, including: according to the set number of new sampling points The parameters establish a one-dimensional multiple equations; after obtaining the corresponding parameters according to the one-dimensional multiple equations, the actual power calibration function is determined by the parameters.

Wherein the set number is four, the acquiring a new sampling point smaller than the set number of the minimum calibration point power, and determining an actual power calibration function according to the set number of new sampling points, including: according to 4 sampling point DAC values and corresponding powers are used to establish a unitary cubic equation; and parameters corresponding to the unary cubic equations are obtained; wherein the digital-to-analog conversion DAC value is an independent variable, the power a function value; determining, by the parameter, the digital-to-analog conversion DAC value and an actual power calibration function corresponding to the corresponding power.

Wherein after the obtaining a new number of sampling points smaller than the minimum calibration point power and determining the actual power calibration function according to the set number of new sampling points, the method further comprises: performing a calibration function according to the actual power The complete Pa characteristic curve is fitted; according to the Pa characteristic curve, the corresponding digital-to-analog conversion DAC value at each power is obtained.

In a second aspect, the embodiment of the present application further provides a power calibration apparatus, including: a data processor coupled to each other and a data collector, wherein the data collector is configured to match the smart terminal according to a predetermined frequency within a range of setting calibration points. The actual transmit power is sampled; the data processor is configured to perform the following steps:

Controlling, by the data collector, sampling the actual transmit power of the smart terminal according to a predetermined frequency within a set calibration point, obtaining a plurality of original sampling points, and acquiring a minimum power original sampling point from the plurality of original sampling points;

Determining, according to the minimum power original sampling point, a minimum calibration point, wherein a difference between the power of the minimum calibration point and the minimum power original sampling point is less than a preset threshold;

Sampling the actual transmit power of the smart terminal again with reference to the minimum calibration point

Obtaining a set number of new sample points that are less than the minimum calibration point power, and determining an actual power calibration function based on the set number of new sample points.

The step of the data processor for performing the determining the minimum calibration point according to the minimum power original sampling point, including:

Obtaining a calibration point that is different from a power of the minimum power original sampling point by less than the preset threshold;

A power point that determines a minimum power difference from the minimum power original sampling point is the minimum calibration point.

The data collector is configured to sample the actual transmit power of the smart terminal according to a predetermined frequency within a range of the set calibration point, and obtain a plurality of original sampling points, including:

The digital-to-analog conversion DAC value corresponding to the actual transmission power of the intelligent terminal is sampled according to a predetermined frequency within a range of the set calibration point, and a plurality of original sampling points including the digital-to-analog conversion DAC value are obtained.

The data processor is configured to perform the step of acquiring a set number of new sampling points that is less than the minimum calibration point power, and determining an actual power calibration function according to the set number of new sampling points, including:

Establishing a unitary multi-equation equation according to the parameter of the set number of new sampling points;

After the corresponding parameters are obtained according to the one-dimensional multiple equations, the actual power calibration function is determined by the parameters.

In a third aspect, the embodiment of the present application further provides a computer readable storage device, where the storage device is configured to store program data that can be run on a processor; the program data is used to perform the following steps:

The actual transmit power of the smart terminal is sampled according to a predetermined frequency within a range of the set calibration point, and a plurality of original sample points are obtained, and a minimum power original sample point is obtained from the plurality of original sample points;

Determining a minimum calibration point according to the minimum power original sampling point; wherein a difference between a power of the minimum calibration point and the minimum power original sampling point is less than a preset threshold;

Establishing a new calibration point range with reference to the minimum calibration point, and sampling the actual transmission power of the smart terminal according to the new calibration point range, wherein the new calibration point range is the minimum calibration point to An area between the maximum calibration points, the maximum calibration point being a maximum calibration point obtained from the plurality of original sampling points;

Wherein the determining the minimum calibration point according to the minimum power original sampling point comprises:

The sampling the actual transmit power of the smart terminal according to the predetermined frequency within the range of the set calibration point, and obtaining a plurality of original sampling points, including:

The actual transmission power of the intelligent terminal is sampled according to a predetermined frequency within a range of the set calibration point by means of logarithmic sampling to obtain a plurality of original sampling points.

The actual transmit power of the smart terminal is sampled according to a predetermined frequency within a set calibration point by means of mean sampling, and a plurality of original sampling points are obtained.

The obtaining a set number of new sampling points that is less than the minimum calibration point power, and determining an actual power calibration function according to the set number of new sampling points, including:

Wherein, the set number is four, the acquiring a new sampling point smaller than the set number of the minimum calibration point power, and determining an actual power calibration function according to the set number of new sampling points, including:

Generating a unitary cubic equation according to the DAC values and the corresponding powers of the four sampling points; and obtaining parameters corresponding to the unary cubic equations; wherein the digital-to-analog conversion DAC value is an independent variable value, Power is a function value;

The digital-to-analog conversion DAC value and the actual power calibration function corresponding to the corresponding power are determined by the parameter.

The method further includes: after the obtaining a new sampling point that is less than the set number of the minimum calibration point power, and determining the actual power calibration function according to the set number of new sampling points, the method further includes:

According to the actual power calibration function, a complete Pa characteristic curve is fitted;

According to the Pa characteristic curve, the corresponding digital-to-analog conversion DAC value at each power is obtained.

Beneficial effect

In the embodiment of the present application, a plurality of original sampling points are obtained by sampling the actual transmitting power of the intelligent terminal according to a predetermined frequency within a range of setting calibration points; and then obtaining a minimum power original sampling point from the original sampling point; and then according to the minimum power The original sampling point, reset the calibration point range, and again sample the actual transmission power of the intelligent terminal according to the predetermined frequency within the new calibration point to obtain a plurality of new sampling points; finally, determine the actual power calibration function according to the new sampling point. Through the above manner, the accuracy of power calibration of the small power communication device is significantly improved.

DRAWINGS

1 is a characteristic curve of a calculated power point under a prior art META tool;

2 is a schematic flow chart of a power calibration method provided by an embodiment of the present application;

3 is a schematic diagram of an original sampling point obtained by logarithmic sampling in the calibration method of FIG. 2;

Figure 4 is a schematic view showing the movement of a calibration point in the calibration method of Figure 2;

5 is a schematic diagram of acquiring a new sampling point by logarithmic sampling in the calibration method of FIG. 2;

6 is a schematic structural diagram of a power calibration apparatus according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a readable storage device provided by an embodiment of the present application.

FIG. 8 is a schematic structural diagram of an intelligent terminal according to an embodiment of the present application.

Embodiments of the invention

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. It is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present application without creative efforts are within the scope of the present application.

For 2G, when the GSM (Global System for Mobile communication) is in normal call, the mobile phone transmits a specified power by detecting the measurement report of the mobile phone and the base station. If the small power calibration value exceeds a certain upper limit, at this time, It may be a normal call, but the power consumption is too large, and the interference will be generated. If the low power calibration value exceeds the lower limit, since the base station controls the transmission power through the mobile phone feedback measurement report, the test real emission value is much smaller than the expected value. There may be a phenomenon of dropped calls, which seriously affects the user experience.

For the inaccuracy of power calibration, the reasons may be various, usually caused by the following reasons: calibration files, MIPI driver files, power sensors, etc. The following mainly introduces the power deviation caused by the calibration file factor, and describes how to modify the calibration file to ensure power accuracy.

All calibration parameters will affect the calibration accuracy of GSM power, but except for the maximum and minimum DAC value calibration points, the default settings are basically set. The normal minimum DAC value calibration point will be set smaller, mainly to ensure that the DAC value will not exceed the range. The lower limit, if it is out of range, the sampling points outside the range cannot be calculated using the three-dimensional function. As shown in FIG. 1 , FIG. 1 is a characteristic curve of a calculated power point under the prior art META tool. As shown in the figure, in the region where the low power variation is relatively obvious, the sampling point of the DAC value is relatively large, and the minimum calibration point and the minimum are shown. The distance between the DAC value sampling points is relatively long, so the DAC sampling points distributed around the minimum calibration point do not have more samples distributed around the minimum DAC value.

Since the factory test is a RF mount connection calibration test system, the power is partially reflected and caused more error than the cable loss and impedance of the R&D lab.

Therefore, embodiments of the present application provide a power calibration method and apparatus, and a computer readable storage device, which reduce the error of power calibration of a small power communication device by reducing the distance between the minimum calibration point and the minimum DAC value sampling point.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart diagram of a power calibration method provided by an embodiment of the present application. The method includes:

201: Sample the actual transmit power of the smart terminal according to a predetermined frequency within a range of the set calibration point, obtain a plurality of original sampling points, and obtain a minimum power original sampling point from the plurality of original sampling points.

The basic principle of calibration is to use the software parameter method to compensate the error of the RF power parameter brought by the hardware. During the calibration of the smart terminal power by the META tool provided by MTK, the calibration point is classified according to the type and type of the intelligent terminal, such as GSM900. The mobile phone transmission frequency has 5-19 total 15 levels, the power level is controlled at 33-5dBm, and then it can be divided into 15th order energy level, and then the GSM900 mobile phone is divided into 15 calibration points according to each energy level.

In this embodiment, the digital-to-analog conversion DAC value corresponding to the actual transmission power of the intelligent terminal is sampled according to a predetermined frequency within a range of the set calibration point, thereby obtaining a plurality of original sampling points including the digital-to-analog conversion DAC value. Specifically, in the range of the calibration point and also at the transmission frequency of the smart terminal, the smart device transmits a synchronous pulse signal in a preset ADC (Analog to Digital Converter) coefficient, in the same time, The power value corresponding to each ADC coefficient is recorded. Because the error of the power calibration of the small power intelligent device is large, the intelligent terminal is sampled by the logarithmic sampling method. As shown in FIG. 3, FIG. 3 is a schematic diagram of the original sampling points obtained by logarithmic sampling in the calibration method of FIG. 2, wherein the ordinate is power and the abscissa is its corresponding digital-to-analog conversion DAC value, and the selected sampling points are selected. For the original sampling point data, the power of each original sampling point and the corresponding digital-to-analog conversion DAC value are sequentially recorded.

In the process of the first sampling, mainly to determine the digital-to-analog conversion DAC value and power range of the intelligent terminal, it is not necessary to perform detailed calculation on the data. Preferably, the smart terminal power can be directly tested near the minimum DAC value. Obtaining a plurality of sets of original sampling point data in which the DAC value is small, and then obtaining the minimum power original sampling point.

In other embodiments, the actual transmit power of the smart terminal may be sampled according to a predetermined frequency within a set calibration point to obtain a plurality of original sampling points. The specific process is similar to the above embodiment. This will not be repeated here.

202: Determine a minimum calibration point according to the minimum power original sampling point; wherein a difference between the minimum calibration point and the minimum power original sampling point power is less than a preset threshold.

In this embodiment, the minimum power original sampling point 302 is also the original sampling point of the minimum DAC value. In the low power range, the power variation and its corresponding digital-to-analog conversion DAC value are approximately linear, but the original sampling around the minimum calibration point 301. With fewer points, the curve directly fitted through the original sampling point has a larger error in the low power range. Therefore, by obtaining a calibration point whose power difference from the minimum power original sampling point is less than a preset threshold; determining a power point having the smallest power difference from the minimum power original sampling point is a minimum calibration point.

Specifically, after taking the minimum power original sampling point 302, the minimum calibration point 301 is moved to the vicinity of the minimum power original sampling point 302 to ensure that the DAC value of the minimum power original sampling point is slightly larger than the minimum calibration. The DAC value of the point is shown in Fig. 4. Fig. 4 is a schematic diagram of the movement of the calibration point in the calibration method of Fig. 2. The ordinate is the power, the abscissa is its corresponding digital-to-analog conversion DAC value, and the minimum calibration point 401 is moved. Up to the upper side of the minimum power original sampling point 402, such that the difference between the minimum calibration point 401 and the minimum power original sampling point 402 is kept within a logarithmic sampling interval. After moving the minimum calibration point 401, the other calibration points remain unchanged. The minimum calibration point after the move to redefine the sample point range.

203: Sampling the actual transmit power of the smart terminal again with reference to the minimum calibration point.

In this embodiment, a new calibration point range is established with reference to the minimum calibration point. The new calibration point ranges from the minimum calibration point to the maximum calibration point. During the sampling process, the minimum calibration point to the maximum power calibration point is expressed. The complete PA characteristic curve (for low power) also needs to be sampled within a certain range less than the minimum calibration point.

As shown in FIG. 5, FIG. 5 is a schematic diagram of acquiring a new sampling point by logarithmic sampling in the calibration method of FIG. 2, and sampling between a new minimum calibration point 501 and a maximum power calibration point (not shown) to obtain a plurality of new ones. At the sampling point, the number of new sampling points is determined according to the required calculation accuracy. Under normal circumstances, the number of new sampling points in the low power range is about 15. In order to avoid the distance between the minimum calibration point 501 and the original sampling point after the movement is too large, the embodiment also adds a plurality of supplementary calibration points (502, 503) in the small power range, and the number of supplementary calibration points (502, 503) is based on The minimum calibration point 501 is determined from the original sampling point spacing and the accuracy required for this calculation. In the actual calculation process, the data obtained by the sampling point is also needed to calculate the supplementary calibration point (502, 503).

Preferably, in order to reduce the calculation error, there are at least 4 sampling points between the new minimum power sampling point and the minimum calibration point.

204: Obtain a set number of new sampling points that is less than the minimum calibration point power, and determine an actual power calibration function according to the set number of new sampling points.

In this embodiment, the calculation of the actual power calibration function of the minimum calibration point firstly establishes a multi-element multiple equations by setting a parameter of the new sampling point; and then obtains the corresponding parameters through the one-dimensional multiple equations, and then the parameters are obtained. Determine the actual power calibration function. Specifically, a three-dimensional equation system is established according to the DAC value of the four sampling points and the corresponding power substitution calibration function (the following formula); the parameters corresponding to the one-dimensional cubic equation group are obtained; wherein the digital-to-analog conversion DAC value is an independent variable value. The power is a function value; the digital-to-analog conversion DAC value and the actual power calibration function corresponding to the corresponding power are determined by parameters.

Y=aX ³ +bX ² +cX+d,

Among them, a, b, c and d are unknown parameters, X is the digital-to-analog conversion DAC value, and Y is the power.

Further, in the actual process, in order to obtain a complete Pa characteristic curve, it is also necessary to calculate an actual power calibration function corresponding to other calibration points. Specifically, all the new sampling points are grouped, and the digital-to-analog conversion DAC value and power of each group of new sampling points are respectively substituted into the above calibration function to obtain the actual power calibration function of each group; and then according to the actual power calibration function of each group, The complete Pa characteristic curve is fitted; finally, according to the Pa characteristic curve, the corresponding digital-to-analog conversion DAC value at each power is obtained.

In a specific embodiment, after acquiring a new sampling point, selecting the four sets of data closest to the minimum calibration point, and substituting the digital-to-analog conversion DAC value and power of the four sets of data into the above equation, a, With the four unknown parameters b, c and d, the Pa characteristic curve of the minimum calibration point can be obtained. Similarly, the closest four sets of sampling point data of each calibration point are selected to obtain the Pa characteristic curves of other groups, thereby fitting the complete Pa characteristic curve, and finally obtaining the corresponding corresponding power according to the complete Pa characteristic curve. Digital to analog conversion DAC value. In the actual calculation process, each calibration point corresponds to more than 4 sets of sampling point data (for a small power range). At this time, the sampling point data corresponding to each calibration point can be substituted into the calibration function to calculate a, The arithmetic mean of the four unknown parameters of b, c, and d.

Different from the prior art, the power calibration method of the present application samples the actual transmit power of the smart terminal according to a predetermined frequency within a set calibration point to obtain a plurality of original sampling points, and obtains a minimum from a plurality of original sampling points. The original sampling point of the power; then determining the minimum calibration point according to the minimum power original sampling point; sampling the actual transmission power of the intelligent terminal again with reference to the minimum calibration point; finally obtaining a new sampling point smaller than the set number of the minimum calibration point power And determine the actual power calibration function based on the set number of new sampling points. Through the above manner, the accuracy of power calibration of the small power communication device is significantly improved.

Referring to FIG. 6, FIG. 6 is a schematic structural diagram of a power calibration apparatus according to an embodiment of the present application.

As shown in FIG. 6, the data processor 601 and the data collector 602 are coupled to each other.

The data collector 602 is configured to sample the actual transmit power of the smart terminal at a predetermined frequency within a set calibration point range.

The data processor 601 is configured to perform a power calibration method and implement the following steps:

The control data collector 602 samples the actual transmit power of the smart terminal according to a predetermined frequency within a set calibration point to obtain a plurality of original sample points, and obtains a minimum power original sample point from the plurality of original sample points.

Determining a minimum calibration point according to the minimum power original sampling point, and sampling the actual transmission power of the intelligent terminal again with reference to the minimum calibration point; acquiring a new sampling point smaller than the set number of minimum calibration point power, and according to the set number The new sampling point determines the actual power calibration function.

After obtaining the calibration function, the data processor 601 fits the complete Pa characteristic curve according to the actual power calibration function; and obtains the corresponding digital-to-analog conversion DAC value under each power according to the Pa characteristic curve.

The data processor 601 is configured to perform the step of determining a minimum calibration point according to the minimum power original sampling point, including:

The data collector 602 is configured to sample the actual transmit power of the smart terminal according to a predetermined frequency within a range of the set calibration point, and obtain a plurality of original sampling points, including:

The data processor 601 is configured to perform the step of acquiring a set number of new sampling points that is less than the minimum calibration point power, and determining an actual power calibration function according to the set number of new sampling points, including:

For the specific implementation process of the data processor 601 and the data collector 602, refer to FIG. 2 to FIG. 5 and any embodiment thereof, and details are not described herein again.

Different from the prior art, the power calibration apparatus of the present application obtains a plurality of original sampling points by sampling the actual transmission power of the intelligent terminal according to a predetermined frequency within a range of setting calibration points, and obtains from a plurality of original sampling points. Minimum power original sampling point; then determining the minimum calibration point according to the minimum power original sampling point; sampling the actual transmission power of the intelligent terminal again with reference to the minimum calibration point; finally obtaining a new sampling of the set quantity less than the minimum calibration point power Point and determine the actual power calibration function based on the set number of new sampling points. Through the above manner, the accuracy of power calibration of the small power communication device is significantly improved.

It will be understood by those skilled in the art that all or part of the steps of the various methods in the above embodiments may be completed by instructions or controlled by related hardware, which may be stored in a computer readable storage medium. And loaded and executed by the processor. The storage medium may include: a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

To this end, embodiments of the present application provide a computer readable storage device for storing program data that can be run on a processor; the program data is used to execute the power calibration method described above.

Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a readable storage device according to an embodiment of the present disclosure. The application further provides a computer readable storage device, where the storage device 701 stores program data 702, and the program data 702 can be An embodiment step performed by the data processor to implement the above power calibration method, wherein the data processor may be a processor having the storage device 701 itself, or may be a processor of another terminal device, such as the storage device 701. Any device capable of carrying the above program data 702 is included.

The program data can perform the method of power calibration in any of the embodiments of FIGS. 2 to 5.

In an embodiment of the power calibration method of the present application, the computer program is used to:

The actual transmit power of the smart terminal is sampled according to a predetermined frequency within a set calibration point to obtain a plurality of original sampling points, and a minimum power original sampling point is obtained from the plurality of original sampling points; and then, according to the minimum power original sampling point, Determining a minimum calibration point; establishing a new calibration point range with reference to the minimum calibration point, and sampling the actual transmission power of the smart terminal again according to the new calibration point range, wherein the new calibration point range is the minimum calibration point To a region between the maximum calibration points, the maximum calibration point is a maximum calibration point obtained from the plurality of original sampling points; finally, obtaining a set number of new sampling points smaller than the minimum calibration point power, and according to the setting The number of new sampling points determines the actual power calibration function.

Referring to FIG. 8, FIG. 8 is a schematic structural diagram of an intelligent terminal according to an embodiment of the present application. The smart terminal may be used to implement the power calibration method and apparatus provided in the foregoing embodiments. The smart terminal 1200 can be a smartphone or a tablet.

As shown in FIG. 8, the smart terminal 1200 may include an RF (Radio Frequency) circuit 110, a memory 120 including one or more (only one shown) computer-readable storage medium, an input unit 130, and a display unit. 140, sensor 150, audio circuit 160, transmission module 170, including processor 180 having one or more processing cores (only one shown) and power supply 190 and the like. It will be understood by those skilled in the art that the structure of the smart terminal 1200 shown in FIG. 8 does not constitute a limitation on the smart terminal 1200, and may include more or less components than those illustrated, or combine some components or different components. Arrangement. among them:

The RF circuit 110 is configured to receive and transmit electromagnetic waves, and realize mutual conversion between electromagnetic waves and electrical signals, thereby communicating with a communication network or other devices. The RF circuit 110 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, a memory, and the like. The RF circuit 110 can communicate with various networks such as the Internet, an intranet, a wireless network, or communicate with other devices over a wireless network. The wireless network described above may include a cellular telephone network, a wireless local area network, or a metropolitan area network. The above wireless networks may use various communication standards, protocols and technologies, including but not limited to global mobile communication systems (Global System for Mobile Communication, GSM), Enhanced Mobile Communication Technology (Enhanced Data GSM Environment, EDGE), Wideband Code Division Multiple Access (Wideband Code) Division Multiple Access, WCDMA), Code Division Multiple Access (Code Division) Access, CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wireless Fidelity, Wi-Fi) (such as the Institute of Electrical and Electronics Engineers Standard IEEE 802.11a, IEEE 802.11b, IEEE 802.11g and / or IEEE 802.11n), VoIP (Voice) Over Internet Protocol, VoIP), Worldwide Interoperability for Microwave Access (Worldwide Interoperability for Microwave Access, Wi-Max, other protocols for mail, instant messaging, and short messages, and any other suitable communication protocol, even those that are not currently being developed.

The memory 120 can be used to store software programs and modules, such as the pre-camera camera auto-filling system and the program instructions/modules corresponding to the method in the above embodiment, and the processor 180 executes by executing the software programs and modules stored in the memory 120. Various functional applications and data processing reduce the error in power calibration of low-power communication devices by reducing the distance between the minimum calibration point and the minimum DAC sample point. Memory 120 may include high speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 120 can further include memory remotely located relative to processor 180, which can be connected to smart terminal 1200 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input unit 130 can be configured to receive input numeric or character information and to generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function controls. In particular, input unit 130 can include touch-sensitive surface 131 as well as other input devices 132. Touch-sensitive surface 131, also referred to as a touch display or trackpad, can collect touch operations on or near the user (such as a user using a finger, stylus, etc., on any suitable object or accessory on touch-sensitive surface 131 or The operation near the touch-sensitive surface 131) and driving the corresponding connecting device according to a preset program. Alternatively, the touch-sensitive surface 131 can include two portions of a touch detection device and a touch controller. Wherein, the touch detection device detects the touch orientation of the user, and detects a signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts the touch information into contact coordinates, and sends the touch information. The processor 180 is provided and can receive commands from the processor 180 and execute them. In addition, the touch-sensitive surface 131 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic waves. In addition to the touch-sensitive surface 131, the input unit 130 can also include other input devices 132. Specifically, other input devices 132 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, joysticks, and the like.

The display unit 140 can be used to display information input by the user or information provided to the user and various graphical user interfaces of the smart terminal 1200, which can be composed of graphics, text, icons, video, and any combination thereof. The display unit 140 may include a display panel 141, and optionally, an LCD (Liquid may be used) The display panel 141 is configured in the form of a Crystal Display (LCD) or an OLED (Organic Light-Emitting Diode). Further, the touch-sensitive surface 131 may cover the display panel 141, and when the touch-sensitive surface 131 detects a touch operation thereon or nearby, it is transmitted to the processor 180 to determine the type of the touch event, and then the processor 180 according to the touch event The type provides a corresponding visual output on display panel 141. Although in FIG. 8, touch-sensitive surface 131 and display panel 141 are implemented as two separate components to implement input and output functions, in some embodiments, touch-sensitive surface 131 can be integrated with display panel 141 for input. And output function.

The smart terminal 1200 can also include at least one type of sensor 150, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor may adjust the brightness of the display panel 141 according to the brightness of the ambient light, and the proximity sensor may close the display panel 141 when the smart terminal 1200 moves to the ear. And / or backlight. As a kind of motion sensor, the gravity acceleration sensor can detect the magnitude of acceleration in all directions (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity. It can be used to identify the gesture of the mobile phone (such as horizontal and vertical screen switching, related Game, magnetometer attitude calibration), vibration recognition related functions (such as pedometer, tapping), etc.; as for the smart terminal 1200 can also be configured with gyroscopes, barometers, hygrometers, thermometers, infrared sensors and other sensors, here No longer.

The audio circuit 160, the speaker 161, and the microphone 162 can provide an audio interface between the user and the smart terminal 1200. The audio circuit 160 can transmit the converted electrical data of the received audio data to the speaker 161 for conversion to the sound signal output by the speaker 161; on the other hand, the microphone 162 converts the collected sound signal into an electrical signal by the audio circuit 160. After receiving, it is converted into audio data, and then processed by the audio data output processor 180, transmitted to the terminal, for example, via the RF circuit 110, or outputted to the memory 120 for further processing. The audio circuit 160 may also include an earbud jack to provide communication of the peripheral earphones with the smart terminal 1200.

The smart terminal 1200 can help the user to send and receive emails, browse web pages, and access streaming media through the transmission module 170 (for example, a Wi-Fi module), which provides wireless broadband Internet access for users. Although FIG. 8 shows the transmission module 170, it can be understood that it does not belong to the essential configuration of the smart terminal 1200, and may be omitted as needed within the scope of not changing the essence of the invention.

The processor 180 is a control center of the smart terminal 1200 that connects various portions of the entire handset with various interfaces and lines, by running or executing software programs and/or modules stored in the memory 120, and recalling data stored in the memory 120. The various functions and processing data of the smart terminal 1200 are executed to perform overall monitoring of the mobile phone. Optionally, the processor 180 may include one or more processing cores; in some embodiments, the processor 180 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and For applications, etc., the modem processor primarily handles wireless communications. It can be understood that the above modem processor may not be integrated into the processor 180.

The intelligent terminal 1200 also includes a power supply 190 (such as a battery) that supplies power to various components. In some embodiments, the power supply can be logically coupled to the processor 180 through a power management system to manage charging, discharging, and power consumption through the power management system. Management and other functions. Power supply 190 may also include any one or more of a DC or AC power source, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.

Although not shown, the smart terminal 1200 may further include a camera (such as a front camera, a rear camera), a Bluetooth module, and the like, and details are not described herein. Specifically, in this embodiment, the display unit of the smart terminal is a touch screen display, the smart terminal further includes a memory, and one or more programs, wherein one or more programs are stored in the memory and configured to be one or one The above processor executes one or more programs containing instructions for performing the following operations:

Sampling the actual transmit power of the smart terminal according to a predetermined frequency within a set calibration point to obtain a plurality of original sample points, and obtaining a minimum power original sample point from the plurality of original sample points; a sampling point, wherein a minimum calibration point is determined; wherein a difference between the minimum calibration point and the minimum power original sampling point is less than a preset threshold; and the actual transmission power of the smart terminal is referenced again with reference to the minimum calibration point Sampling; obtaining a set number of new sampling points that are less than the minimum calibration point power, and determining an actual power calibration function based on the set number of new sampling points.

Different from the prior art, the present application samples a plurality of original sampling points by sampling the actual transmission power of the intelligent terminal according to a predetermined frequency within a range of setting calibration points, and obtains a minimum power original sampling point from a plurality of original sampling points. Then, according to the minimum power original sampling point, the minimum calibration point is determined; the actual transmission power of the intelligent terminal is sampled again with reference to the minimum calibration point; finally, a new sampling point smaller than the set number of minimum calibration point power is obtained, and according to the setting A fixed number of new sampling points determine the actual power calibration function. Through the above manner, the accuracy of power calibration of the small power communication device is significantly improved.

The above description is only the embodiment of the present application, and thus does not limit the scope of the patent application, and the equivalent structure or equivalent process transformation made by using the specification and the drawings of the present application, or directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of this application.

Claims

A power calibration method comprising:

The actual transmit power of the smart terminal is sampled according to a predetermined frequency within a range of the set calibration point, and a plurality of original sample points are obtained, and a minimum power original sample point is obtained from the plurality of original sample points;

Determining a minimum calibration point according to the minimum power original sampling point; wherein a difference between a power of the minimum calibration point and the minimum power original sampling point is less than a preset threshold;

Sampling the actual transmit power of the smart terminal again with reference to the minimum calibration point;

Obtaining a set number of new sample points that are less than the minimum calibration point power, and determining an actual power calibration function based on the set number of new sample points.
The power calibration method according to claim 1, wherein said determining a minimum calibration point according to said minimum power original sampling point comprises:

Obtaining a calibration point that is different from a power of the minimum power original sampling point by less than the preset threshold;

A power point that determines a minimum power difference from the minimum power original sampling point is the minimum calibration point.
The power calibration method according to claim 1, wherein the sampling the actual transmit power of the smart terminal according to a predetermined frequency within a range of the set calibration point to obtain a plurality of original sampling points, including:

The digital-to-analog conversion DAC value corresponding to the actual transmission power of the intelligent terminal is sampled according to a predetermined frequency within a range of the set calibration point, and a plurality of original sampling points including the digital-to-analog conversion DAC value are obtained.
The power calibration method according to claim 3, wherein the sampling the actual transmit power of the smart terminal according to a predetermined frequency within a range of the set calibration point to obtain a plurality of original sampling points, including:

The actual transmission power of the intelligent terminal is sampled according to a predetermined frequency within a range of the set calibration point by means of logarithmic sampling to obtain a plurality of original sampling points.
The power calibration method according to claim 3, wherein the sampling the actual transmit power of the smart terminal according to a predetermined frequency within a range of the set calibration point to obtain a plurality of original sampling points, including:

The actual transmit power of the smart terminal is sampled according to a predetermined frequency within a set calibration point by means of mean sampling, and a plurality of original sampling points are obtained.
The power calibration method according to claim 3, wherein said acquiring a set number of new sampling points smaller than said minimum calibration point power, and determining an actual power calibration function based on said set number of new sampling points, including :

Establishing a unitary multi-equation equation according to the parameter of the set number of new sampling points;

After the corresponding parameters are obtained according to the one-dimensional multiple equations, the actual power calibration function is determined by the parameters.
The power calibration method according to claim 6, wherein said set number is four, said acquiring a set number of new sampling points smaller than said minimum calibration point power, and according to said set number of new ones The sampling point determines the actual power calibration function, including:

Generating a unitary cubic equation according to the DAC values and the corresponding powers of the four sampling points; and obtaining parameters corresponding to the unary cubic equations; wherein the digital-to-analog conversion DAC value is an independent variable value, Power is a function value;

The digital-to-analog conversion DAC value and the actual power calibration function corresponding to the corresponding power are determined by the parameter.
The power calibration method according to claim 7, wherein after said obtaining a set number of new sampling points smaller than said minimum calibration point power, and determining an actual power calibration function based on said set number of new sampling points ,Also includes:

According to the actual power calibration function, a complete Pa characteristic curve is fitted;

According to the Pa characteristic curve, the corresponding digital-to-analog conversion DAC value at each power is obtained.
A power calibration apparatus includes: a data processor coupled to each other and a data collector, wherein the data collector is configured to sample an actual transmit power of the smart terminal according to a predetermined frequency within a set calibration point; the data The processor is used to perform the following steps:

Controlling, by the data collector, sampling the actual transmit power of the smart terminal according to a predetermined frequency within a set calibration point, obtaining a plurality of original sampling points, and acquiring a minimum power original sampling point from the plurality of original sampling points;

Determining, according to the minimum power original sampling point, a minimum calibration point, wherein a difference between the power of the minimum calibration point and the minimum power original sampling point is less than a preset threshold;

Sampling the actual transmit power of the smart terminal again with reference to the minimum calibration point

Obtaining a set number of new sample points that are less than the minimum calibration point power, and determining an actual power calibration function based on the set number of new sample points.
The power calibration apparatus according to claim 9, wherein said data processor is operative to perform said step of determining a minimum calibration point based on said minimum power original sampling point, comprising:

Obtaining a calibration point that is different from a power of the minimum power original sampling point by less than the preset threshold;

A power point that determines a minimum power difference from the minimum power original sampling point is the minimum calibration point.
The power calibration apparatus according to claim 9, wherein the data collector is configured to sample the actual transmit power of the smart terminal according to a predetermined frequency within a range of the set calibration point to obtain a plurality of original sample points, including:

The digital-to-analog conversion DAC value corresponding to the actual transmission power of the intelligent terminal is sampled according to a predetermined frequency within a range of the set calibration point, and a plurality of original sampling points including the digital-to-analog conversion DAC value are obtained.
The power calibration apparatus according to claim 11, wherein said data processor is configured to perform said acquiring a set number of new sampling points smaller than said minimum calibration point power, and based on said set number of new sampling points The steps to determine the actual power calibration function include:

Establishing a unitary multi-equation equation according to the parameter of the set number of new sampling points;

After the corresponding parameters are obtained according to the one-dimensional multiple equations, the actual power calibration function is determined by the parameters.
A computer readable storage device, wherein the storage device is configured to store program data executable on a processor; the program data is configured to perform the following steps:

The actual transmit power of the smart terminal is sampled according to a predetermined frequency within a range of the set calibration point, and a plurality of original sample points are obtained, and a minimum power original sample point is obtained from the plurality of original sample points;

Determining a minimum calibration point according to the minimum power original sampling point; wherein a difference between a power of the minimum calibration point and the minimum power original sampling point is less than a preset threshold;

Establishing a new calibration point range with reference to the minimum calibration point, and sampling the actual transmission power of the smart terminal according to the new calibration point range, wherein the new calibration point range is the minimum calibration point to An area between the maximum calibration points, the maximum calibration point being a maximum calibration point obtained from the plurality of original sampling points;

Obtaining a set number of new sample points that are less than the minimum calibration point power, and determining an actual power calibration function based on the set number of new sample points.
The computer readable storage device of claim 13, wherein the determining a minimum calibration point based on the minimum power original sampling point comprises:

Obtaining a calibration point that is different from a power of the minimum power original sampling point by less than the preset threshold;

A power point that determines a minimum power difference from the minimum power original sampling point is the minimum calibration point.
The computer readable storage device according to claim 13, wherein the sampling the actual transmit power of the smart terminal according to a predetermined frequency within a range of the set calibration point to obtain a plurality of original sampling points comprises:

The digital-to-analog conversion DAC value corresponding to the actual transmission power of the intelligent terminal is sampled according to a predetermined frequency within a range of the set calibration point, and a plurality of original sampling points including the digital-to-analog conversion DAC value are obtained.
The computer readable storage device according to claim 15, wherein the sampling the actual transmission power of the smart terminal according to a predetermined frequency within a range of the set calibration point to obtain a plurality of original sampling points, comprising:

The actual transmission power of the intelligent terminal is sampled according to a predetermined frequency within a range of the set calibration point by means of logarithmic sampling to obtain a plurality of original sampling points.
The computer readable storage device according to claim 15, wherein the sampling the actual transmission power of the smart terminal according to a predetermined frequency within a range of the set calibration point to obtain a plurality of original sampling points, comprising:

The actual transmit power of the smart terminal is sampled according to a predetermined frequency within a set calibration point by means of mean sampling, and a plurality of original sampling points are obtained.
The power calibration method according to claim 15, wherein said acquiring a set number of new sampling points smaller than said minimum calibration point power, and determining an actual power calibration function based on said set number of new sampling points, including :

Establishing a unitary multi-equation equation according to the parameter of the set number of new sampling points;

After the corresponding parameters are obtained according to the one-dimensional multiple equations, the actual power calibration function is determined by the parameters.
The computer readable storage device according to claim 18, wherein said set number is four, said acquiring a set number of new sampling points smaller than said minimum calibration point power, and according to said set number The new sampling point determines the actual power calibration function, including:

Generating a unitary cubic equation according to the DAC values and the corresponding powers of the four sampling points; and obtaining parameters corresponding to the unary cubic equations; wherein the digital-to-analog conversion DAC value is an independent variable value, Power is a function value;

The digital-to-analog conversion DAC value and the actual power calibration function corresponding to the corresponding power are determined by the parameter.
The computer readable storage device of claim 19, wherein said acquiring a set number of new sampling points that is less than said minimum calibration point power, and determining an actual power calibration based on said set number of new sampling points After the function, it also includes:

According to the actual power calibration function, a complete Pa characteristic curve is fitted;

According to the Pa characteristic curve, the corresponding digital-to-analog conversion DAC value at each power is obtained.