Power compensation in a mobile station

• US 20060199547A1
• Filed: 02/24/2006
• Published: 09/07/2006
• Est. Priority Date: 02/26/2005
• Status: Abandoned Application

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Song, Young-Joong
• Application Number:
  US11/361,563
• Publication Number:
  US 20060199547A1
• Time in Patent Office: Days
• US Class Current: 455/67.11
• CPC Class Codes: H04W 52/288 taking into account the usage mode, e.g. hands-free, data transmission, telephone

Abstract

A method for compensating power of a mobile communications terminal is provided, the method performing additional power compensation according to channels with respect to shifting power losses of a duplexer. The method performs basic compensation with no consideration to the channels with respect to power losses according to temperature, implements a table capable of compensating losses due to shifting characteristics of the duplexer which occur at a specific channel and temperature, and further performs power loss compensation by the duplexer in addition to the basic temperature compensation with respect to a signal pertaining to corresponding temperature and channel region in order that transmission power can be provided as desired target power even in extremely high or low temperature and sensitivity can be maintained by compensating reception power.

Claims

1. A method for controlling power in a mobile station, the method comprising:

determining a first power loss associated with an operating temperature of the mobile station;

adjusting the power level of the mobile station to compensate for the determined first power loss;

determining a second power loss associated with an operating temperature of the mobile station with respect to a specific operating channel; and

adjusting a power level of the mobile station to compensate for the determined second power loss.

2. The method of claim 1, wherein the specific operating channel of the mobile station is one of an upper channel and a lower channel.

3. The method of claim 1, wherein the first and second power losses comprise at least one of a transmission power loss and a reception power loss.

4. The method of claim 1, wherein adjusting the power level of the mobile station to compensate for the determined second power loss comprises compensating for a power loss due to shifting of a pass band of a duplexer according to a change in the operating temperature with respect to the specific operating channel.

5. The method of claim 4, wherein adjusting the power level of the mobile station to compensate for the determined second power loss comprises determining a power compensation value from a power compensation table.

6. The method of claim 5, wherein the power compensation value is obtained by experiment based on measured temperature levels and shifting power losses of the duplexer.

7. A method for controlling power in a mobile station, the method comprising:

selecting a temperature level by measuring an operating temperature of the mobile station;

performing a first power loss compensation by obtaining a power loss compensation value corresponding to the selected temperature level from a temperature compensation table;

selecting a specific channel of a frequency pass band of a duplexer;

obtaining a power loss compensation value associated with the specific channel and the selected temperature level; and

performing a second power loss compensation with respect to the specific channel by applying automatic gain control (AGC) to the obtained power loss compensation value.

8. The method of claim 7, wherein the power loss compensation compensates for at least one of a transmission power loss and a reception power loss.

9. The method of claim 7, wherein the mobile station uses the specific channel to communicate at least one of a voice signal, a data signal, and a video signal.

10. The method of claim 7, wherein the selected channel is one of an upper and a lower channel of the frequency pass band of the duplexer.

11. The method of claim 10, wherein, the upper channel suffers increasingly greater power losses as the operating temperature of the mobile station increases and the lower channel suffers increasingly greater power losses as the operating temperature of the mobile station decreases.

12. The method of claim 7, wherein performing the second power loss compensation comprises selecting the operating channel of the mobile station where power losses occur due to shifting characteristics of a power characteristic curve of the duplexer according to the change in the operating temperature of the mobile station.

13. The method of claim 12, wherein performing the second power loss compensation further comprises power compensation according to the change in the operating temperature of the mobile station.

14. A method for performing power loss compensation in a mobile station, the method comprising:

selecting specific channels where power losses occur due to of pass band shifting characteristics of a duplexer according to a change in temperature from channels corresponding to a predetermined temperature region;

constructing a power loss compensation table comprising power loss compensation values corresponding to the specific channels;

obtaining a power loss compensation value from a basic temperature compensation table by measuring the operating temperature of the mobile station; and

obtaining a power loss compensation value from the power loss compensation table, wherein the measured operating temperature corresponds to a specific region and each specific channel corresponds to a specific channel region.

15. The method of claim 14, wherein the specific channels suffer greater power losses according to an increase in temperature for upper channels and greater power losses according to a decrease in temperature for lower channels.

16. The method of claim 14, wherein the power loss compensation is performed for at least one of reception power and transmission power.

17. A mobile station adapted to perform power loss compensation, the mobile station comprising:

a sensor adapted to measure an operating temperature of a transmitting end of the mobile station and to generate a sensor value corresponding to the measured temperature;

a storage unit adapted to store a first power loss compensation value based on the sensor value and a second power loss compensation value corresponding to frequency pass band channels of a duplexer and the temperature measured by the sensor; and

a controller adapted to control a gain of a power amplifier to perform a first power compensation according to the sensor value and a second power compensation according to both the sensor value and the frequency pass band channel of the duplexer.

18. The mobile station of claim 17, wherein the storage unit is adapted to store the first power loss compensation value in a temperature compensation table, wherein the temperature compensation table stores a plurality power loss compensation values generated by dividing a measurable range of the sensor value by a specific interval, the first power compensation values corresponding to the temperature levels.

19. The mobile station of claim 17, wherein the storage unit is adapted to store the second power loss compensation values corresponding to the frequency pass band channels of the duplexer according to temperature levels in a power compensation table;

20. The mobile station of claim 17, wherein the controller is adapted to determine the temperature level corresponding to a sensor value and read the first power compensation value corresponding to the temperature level from the storage unit in order to control the gain of the power amplifier to perform the first power compensation.

21. The mobile station of claim 17, wherein the controller is adapted to determine the temperature level corresponding to the sensor value, retrieve a specific channel currently occupied by the duplexer, and read the second power compensation value corresponding to both the determined temperature level and the specific channel in order to control the gain of the power amplifier to perform the second power compensation.