TWI455564B - System and method for auto calibrating power of a mobile phone - Google Patents

Description

Mobile phone power automatic calibration system and method

The invention relates to a mobile phone power automatic calibration system and method, in particular to an output power automatic calibration system and method for a mobile phone power amplifier.

In a mobile communication system, since the distance of the mobile phone from the wireless base station is not fixed. In this way, in order to ensure that the receiving power of the wireless base station is within an optimal range and to ensure the optimal capacity of the communication system, it is necessary to automatically adjust the transmission power of the mobile phone at any time as the distance between the mobile phone and the wireless base station changes.

At present, the main frequency bands of mobile phones are: 850MHz, 900MHz, 1800MHz and 1900MHz. There are 15 or 16 different power levels for each band. Among them: mobile phones in the 850MHz and 900MHz bands have 15 different power levels, and mobile phones in the 1800MHz and 1900MHz bands have 16 different power levels. And the Auto Power Calibrate (APC) value corresponding to each power level is different. Generally, the mobile phone has an APC table stored in its flash memory (Flash-ROM) at the factory to record the APC value and its corresponding actual power value at different power levels. For example, as shown in FIG. 1, it is a schematic diagram of an APC table of a mobile phone in the 900 MHz band. The APC table records the APC value and the corresponding actual power value for each power level of the power amplifier of the handset in the 900 MHz band.

In order to be able to accurately change the transmit power of the mobile phone at any time, the mobile phone calculates The power value first controls the power amplifier of the handset to change the amount of its transmit power by looking up the corresponding APC table and then converting the found APC value into a voltage.

However, the APC value and the corresponding actual power value stored in the mobile phone APC table may be different from the theoretical power value when the mobile phone is shipped, so that the power amplifier of the mobile phone cannot accurately change the transmission power.

In view of the above, it is necessary to provide a mobile phone power automatic calibration system and method, which can calibrate the APC value and the corresponding actual power value saved in the APC table of the mobile phone, so that the power amplifier of the mobile phone can accurately change the transmission power.

A mobile phone power automatic calibration system, the mobile phone is connected with a computer and a power tester, and the computer is connected to the power tester, and the mobile phone comprises an automatic power calibration table and a power amplifier, the automatic The power calibration table records the automatic power calibration value and the corresponding actual power value of the power amplifier of the mobile phone at each power level, and the computer includes a setting module, a signal transmitting module, an acquiring module, a computing module, and an adjustment mode. a group, wherein: the setting module is configured to set a current automatic power calibration value of the plurality of mobile phones according to the automatic power calibration table; the signal transmitting module is configured to complete a current automatic power calibration value for the mobile phone After the setting, the power amplifier transmits the radio frequency signal to the power tester; the power tester receives the radio frequency signal and tests each transmit power value of the power amplifier of the mobile phone under different automatic power calibration values; The group is used to obtain each transmit power value of the power amplifier obtained by the power tester test; the calculation module is used for calculation The automatic power calibration value takes each theoretical transmit power value of the power amplifier of the mobile phone in addition to the automatic power calibration value set by the module in the automatic power calibration table; and the adjustment module is used according to the Calculated value of each theoretical transmit power The actual power value corresponding to each automatic power calibration value in the automatic power calibration table is updated.

A mobile phone power automatic calibration method, the mobile phone is connected with a computer and a power tester, and the computer is connected to the power tester, and the mobile phone comprises an automatic power calibration automatic power calibration table and a power amplifier, wherein The automatic power calibration table records the automatic power calibration value and the corresponding actual power value of the power amplifier of the mobile phone at each power level. The method includes the following steps: setting step: setting the current automatic of multiple mobile phones according to the automatic power calibration table of the mobile phone Power calibration value; signal transmission step: let the power amplifier transmit the radio frequency signal to the power tester; test step: after receiving the radio frequency signal, the power tester tests the respective transmit power values of the power amplifier of the mobile phone under different automatic power calibration values; Step: obtaining each transmit power value of the power amplifier obtained by the power tester; calculating step: calculating a power amplifier of the mobile phone when the automatic power calibration value is taken in addition to the set automatic power calibration value in the automatic power calibration table Theoretical transmit power values; and adjustments Steps of: adjusting transmit power value updated value of the actual power value of each of the automatic power calibration automatic power corresponding to the calibration table according to the calculated respective theoretical.

Compared with the prior art, the mobile phone power automatic calibration system and method can calibrate the APC value and the corresponding actual power value saved in the APC table of the mobile phone, so that the power amplifier of the mobile phone can accurately change the magnitude of the transmission power.

1‧‧‧ computer

2‧‧‧Power Tester

3‧‧‧Mobile phones

31‧‧‧Flash memory

32‧‧‧Power Amplifier

11‧‧‧Setup module

12‧‧‧Signal Transmitter Module

13‧‧‧Get the module

14‧‧‧Computation Module

15‧‧‧Adjustment module

S11‧‧‧Set the current APC value of multiple mobile phones according to the APC table of the mobile phone

S12‧‧‧A power amplifier transmits RF signal to power tester

S13‧‧‧Test the power amplifier's power amplifiers at different APC values for each transmit power value

S14‧‧‧Acquire the respective transmit power values of the power amplifiers obtained from the test

S15‧‧‧ Calculate the theoretical transmit power values of the power amplifiers of the mobile phone when the APC value takes all values other than the set APC value

S16‧‧‧ Adjust the actual power value corresponding to each APC value in the APC table according to the calculated theoretical transmit power values

Figure 1 is a schematic diagram of an APC table of a mobile phone in the 900 MHz band.

2 is a system architecture diagram of a preferred embodiment of the mobile phone power automatic calibration system of the present invention.

3 is a flow chart of a preferred embodiment of the mobile phone power automatic calibration method of the present invention.

2 is a system architecture diagram of a preferred embodiment of the mobile phone power automatic calibration system of the present invention. The mobile phone power automatic calibration system includes a computer 1, a power tester 2 and a mobile phone 3. The power tester 2 is connected to the computer 1 by a general-purpose interface bus (GPIB), and the power tester 2 is connected to the mobile phone 3 by a radio frequency signal line. The mobile phone 3 is connected to the computer 1 by a universal serial bus (USB).

The mobile phone 3 includes a flash memory (Flash-ROM) 31 and a power amplifier 32. An APC table is stored in the flash memory 31. The APC table describes the APC value and the corresponding actual power value of the power amplifier 32 of the handset 3 at each power level. The power amplifier 32 is used to change the transmission power of the mobile phone 3 according to the APC value in the APC table.

The power tester 2 is used to test the power emitted by the power amplifier 32 when the handset 3 is at different APC values.

The computer 1 includes a setting module 11 , a signal transmitting module 12 , an obtaining module 13 , a computing module 14 , and an adjusting module 15 .

The setting module 11 is configured to set a current APC value of the plurality of mobile phones 3 according to the APC table of the mobile phone 3. In the present embodiment, the setting module 11 sets the current APC value of the mobile phone 3 to the maximum value, the minimum value, and the intermediate value in the APC table, respectively. For example, in the APC table shown in FIG. 1, the current APC value of the mobile phone 3 can be set to 759, 93, 301 by the setting module 11, respectively.

The signal transmitting module 12 is configured to enable the power amplifier 32 to transmit a radio frequency signal to the power tester 2 after the setting module 11 completes the setting of the current APC value of the mobile phone 3.

The power tester 2 tests the respective transmit power values of the power amplifier 32 of the mobile phone 3 at different APC values after receiving the radio frequency signal. For example, when the current APC value of the mobile phone 3 is set to a maximum value of 759, the power amplifier 32 has a power output value of 31.98; when the current APC value of the mobile phone 3 is set to a minimum value of 93, the power test is performed. The power amplifier 32 has a transmit power value of 4.82. When the current APC value of the mobile phone 3 is set to an intermediate value of 301, the power amplifier 32 has a transmit power value of 18.96.

The acquisition module 13 is configured to obtain the respective transmit power values of the power amplifier 32 obtained by the power tester 2 test.

The calculation module 14 is configured to calculate a theoretical transmit power value of the power amplifier 32 of the mobile phone 3 when the APC value is taken from the APC table except for the APC value set by the setting module 11. In the preferred embodiment, the computing module 14 is calculated according to the formula APC=a*10^(power/c)+b. Where power is the transmit power value and a, b, and c are parameters.

The computing module 14 first substitutes the obtained three sets of (APC, power) values: (759, 31.98), (93, 4.82), (301, 18.96) into the formula APC=a*10^(power/c) )) calculate the a, b, and c parameter values in +b; then substitute the calculated a, b, and c parameter values into the formula APC=a*10^(power/c)+b, and then calculate the APC. The power value when the values take other values is the corresponding theoretical transmit power value of the power amplifier 32.

The adjustment module 15 is configured to adjust according to the calculated theoretical transmit power values The actual power value corresponding to each APC value in the APC table is updated.

As shown in FIG. 3, it is a flowchart of a preferred embodiment of the mobile phone power automatic calibration method of the present invention. First, in step S11, the setting module 11 sets the current APC values of the plurality of mobile phones 3 based on the APC table of the mobile phone 3. In the present embodiment, step S11 sets the current APC value of the mobile phone 3 to the maximum value, the minimum value, and the intermediate value in the APC table, respectively.

In step S12, after completing the setting of the current APC value of the mobile phone 3, the signal transmitting module 12 causes the power amplifier 32 to transmit a radio frequency signal to the power tester 2.

In step S13, the power tester 2 tests the respective transmit power values of the power amplifier 32 of the mobile phone 3 at different APC values after receiving the radio frequency signal. For example, when the current APC value of the mobile phone 3 is set to a maximum value of 759, the power amplifier 32 has a power output value of 31.98; when the current APC value of the mobile phone 3 is set to a minimum value of 93, the power test is performed. The power amplifier 32 has a transmit power value of 4.82. When the current APC value of the mobile phone 3 is set to an intermediate value of 301, the power amplifier 32 has a transmit power value of 18.96.

In step S14, the acquisition module 13 obtains the respective transmit power values of the power amplifier 32 obtained by the power tester 2.

In step S15, the calculation module 14 calculates the theoretical transmit power value of the power amplifier 32 of the mobile phone 3 when the APC value takes the values other than the APC value set in the step S11 in the APC table. In the preferred embodiment, step S15 is calculated according to the formula APC=a*10^(power/c)+b. Where power is the transmit power value and a, b, and c are parameters. The calculation module 14 first obtains three sets of (APC, power) values: (759, 31.97), (93, 4.84), (301, 18.97) and substitutes the formula APC=a*10^(power/c). Calculate the a, b, c parameter values in +b; then Then, the calculated a, b, and c parameter values are substituted into the formula APC=a*10^(power/c)+b, and then the power value when the APC value takes other values is calculated, that is, the power amplifier 32. The corresponding theoretical transmit power value.

In step S16, the adjustment module 15 adjusts and updates the actual power value corresponding to each APC value in the APC table according to the calculated theoretical transmit power values.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments of the present invention. Neither should the spirit and scope of the technical solutions of the present invention be deviated.

S11‧‧‧Set the current APC value of multiple mobile phones according to the APC table of the mobile phone

S12‧‧‧A power amplifier transmits RF signal to power tester

S13‧‧‧Test the power amplifier's power amplifiers at different APC values for each transmit power value

S14‧‧‧Acquire the respective transmit power values of the power amplifiers obtained from the test

S15‧‧‧ Calculate the theoretical transmit power values of the power amplifiers of the mobile phone when the APC value takes all values other than the set APC value

S16‧‧‧ Adjust the actual power value corresponding to each APC value in the APC table according to the calculated theoretical transmit power values

Claims (6)

A mobile phone power automatic calibration system, the mobile phone is connected with a computer and a power tester, and the computer is connected to the power tester, and the mobile phone comprises an automatic power calibration table and a power amplifier, the automatic The power calibration table records the automatic power calibration value and the corresponding actual power value of the power amplifier of the mobile phone at each power level, and the computer includes a setting module, a signal transmitting module, an acquiring module, a computing module, and an adjustment mode. a group, wherein: the setting module is configured to set a current automatic power calibration value of the plurality of mobile phones according to the automatic power calibration table; the signal transmitting module is configured to complete a current automatic power calibration value for the mobile phone After the setting, the power amplifier transmits the radio frequency signal to the power tester; the power tester receives the radio frequency signal and tests each transmit power value of the power amplifier of the mobile phone under different automatic power calibration values; The group is configured to obtain each transmit power value of the power amplifier obtained by the power tester test; the calculation module is used according to Set each automatic power calibration value, the obtained power amplifier's each transmit power value, and the formula APC=a*10^(power/c)+b. When the automatic power calibration value is taken, the automatic power calibration table is set in addition to the setting module. The theoretical transmit power values of the power amplifiers of the mobile phone when the values other than the set automatic power calibration values are, wherein APC is an automatic power calibration value, power is a theoretical transmit power value, and a, b, and c are parameters; The corresponding theoretical transmit power value of the amplifier is calculated as follows: the calculation module first substitutes the set auto power calibration values and the acquired transmit power values of the power amplifier into the formula APC=a*10^(power/c )) calculate the a, b, c parameter values in +b, and then substitute the calculated a, b, c parameter values into the formula APC=a*10^(power/c)+b, and then Calculate the power value when the APC takes other values in the automatic power calibration table, that is, the corresponding theoretical transmit power value of the power amplifier; and the adjustment module is used to adjust and update according to the calculated theoretical transmit power values. The actual power value corresponding to each automatic power calibration value in the automatic power calibration table. The mobile phone power automatic calibration system according to claim 1, wherein the setting module sets the current automatic power calibration value of the mobile phone to a maximum value, a minimum value, and an intermediate value in the automatic power calibration table. The mobile phone power automatic calibration system according to claim 2, wherein the power tester tests that the current automatic power calibration value of the mobile phone is respectively set to a maximum value, a minimum value, and an intermediate value in the automatic power calibration table. The value of each transmit power corresponding to the power amplifier of the mobile phone. A mobile phone power automatic calibration method, the mobile phone is connected with a computer and a power tester, and the computer is connected to the power tester, and the mobile phone comprises an automatic power calibration automatic power calibration table and a power amplifier, wherein The automatic power calibration table records the automatic power calibration value and the corresponding actual power value of the power amplifier of the mobile phone at each power level. The method includes the following steps: setting step: setting the current automatic of multiple mobile phones according to the automatic power calibration table of the mobile phone Power calibration value; signal transmission step: let the power amplifier transmit the radio frequency signal to the power tester; test step: after receiving the radio frequency signal, the power tester tests the respective transmit power values of the power amplifier of the mobile phone under different automatic power calibration values; Step: obtaining each transmit power value of the power amplifier obtained by the power tester; calculating steps: according to the set automatic power calibration values, the obtained transmit power values of the power amplifier, and the formula APC=a*10^(power /c)+b calculation when automatic power calibration value is taken automatically power calibration table When the values of other phone functions apart from automatic power calibration of the set value The theoretical transmit power values of the rate amplifier, wherein APC is an automatic power calibration value, power is a theoretical transmit power value, and a, b, and c are parameters; the corresponding theoretical transmit power value of the power amplifier is calculated as follows: Set each of the automatic power calibration values and the obtained transmit power values of the power amplifier into the formula APC=a*10^(power/c)+b to calculate the a, b, and c parameter values, and then calculate the values. The a, b, and c parameter values are substituted into the formula APC=a*10^(power/c)+b, and then the power value of the APC taking the other values in the automatic power calibration table is calculated, which is the corresponding power amplifier. The theoretical transmit power value; and the adjusting step: adjusting the actual power value corresponding to each automatic power calibration value in the automatic power calibration table according to the calculated theoretical transmit power values. The mobile phone power automatic calibration method according to claim 4, wherein the setting step is to set the current automatic power calibration value of the mobile phone to a maximum value, a minimum value, and an intermediate value in the automatic power calibration table, respectively. The mobile phone power automatic calibration method according to claim 5, wherein the test step tests that the current automatic power calibration value of the mobile phone is respectively set to a maximum value, a minimum value, and an intermediate value in the automatic power calibration table. The value of each transmit power corresponding to the power amplifier of the mobile phone.