System and method for dynamically improving call connection

• US 8,655,291 B2
• Filed: 06/27/2011
• Issued: 02/18/2014
• Est. Priority Date: 03/20/2007
• Status: Active Grant

• Current Assignee: Skyworks Solutions Incorporated
• Original Assignee: Skyworks Solutions Incorporated
• Inventors: Agahi, Darioush, Govindswamy, Arumugam
• Primary Examiner(s): Trinh, Sonny
• Application Number:
  US13/169,952
• Publication Number:
  US 20120020294A1
• Time in Patent Office: 967 Days
• Field of Search: 455/39, 455/69, 455/522, 455/517, 455/127.1, 455/127.2, 455/115.1, 455/115.3
• US Class Current: 455/127.1
• CPC Class Codes: H03G 3/3047 for intermittent signals, e.g. burst signals
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/50 at the moment of starting communication in a multiple access environment

Abstract

A method for controlling an output of a power amplifier of a portable communication device includes determining a power level of a signal received at the portable communication device, generating a receive reference signal (RXLEV) that is indicative of the power level of the signal received at the portable communication device, and determining whether the receive reference signal is within a threshold value window. When the receive reference signal is within the threshold value window a nominal power output of a power amplifier in the portable communication device is transmitted during a random access channel signal transmission. When the receive reference signal is below the threshold value, a power output of the power amplifier in the portable communication device is increased during the random access channel signal transmission. When the receive reference signal is above the threshold value, a power output of the power amplifier in the portable communication device is decreased during the random access channel signal transmission.

Claims

1. A method for controlling a power amplifier of a portable communication device, the method comprising:

determining strength of a received radio-frequency (RF) signal;

generating a receive reference signal representative of the strength of the received RF signal;

comparing the receive reference signal with a threshold value; and

generating, within the portable communication device, a control signal for the power amplifier with a digital-to-analog converter (DAC) based on the comparison, the DAC configured to generate a maximum DAC (MAXDAC) value as part of the control signal, the generating of the control signal being performed in a baseband subsystem, the control signal representative of an output power level of the power amplifier during a random access channel signal transmission, the control signal being configured so that the output power level is adjusted based on the comparison, the MAXDAC configured to allow generation of a power profile for the random access channel signal transmission.

2. The method of claim 1 wherein the control signal is configured so that the output power level is increased if the receive reference signal is below the threshold value.

3. The method of claim 1 wherein the control signal is configured so that the output power level is decreased if the receive reference signal is above the threshold value.

4. The method of claim 1 wherein the adjusting of the output power level includes an adjustment by a selected offset amount.

5. The method of claim 4 wherein the selected offset amount is between −

1 dB and +1 dB.

6. The method of claim 1 wherein the generating of the control signal is performed in a radio frequency (RF) circuit.

7. The method of claim 1 wherein the strength of the received RF signal includes a power level of the received RF signal.

8. The method of claim 1 wherein the generating of the control signal includes generating an analog representation of a digital control signal representative of the output power level.

9. The method of claim 8 wherein the analog representation includes a maximum value of the output power level.

10. A system for controlling a power amplifier of a portable communication device, the system comprising:

a receiver having a receive level detect element configured to generate a receive reference signal representative of strength of a received signal;

a control component configured to generate a control signal based on comparison of the receive reference signal with a threshold value, the control component being part of a baseband subsystem and including a digital-to-analog converter (DAC), the DAC configured to generate a maximum DAC (MAXDAC) value as part of the control signal; and

a power amplifier controller configured to receive the control signal and configure a transmit signal having an output power level during a random access channel signal transmission, the control signal being configured so that the output power level is adjusted based on the comparison, the MAXDAC configured to allow the power amplifier controller to generate a power profile for the random access channel signal transmission.

11. The system of claim 10 wherein the control component is part of a radio frequency (RF) subsystem.

12. A method for controlling a power amplifier of a portable communication device, the method comprising:

determining strength of a received radio-frequency (RF) signal;

generating a receive reference signal representative of the strength of the received RF signal;

comparing the receive reference signal with a threshold value;

generating, within the portable communication device, a control signal with a digital-to-analog converter (DAC) based on the comparison, the DAC configured to generate a maximum DAC (MAXDAC) value as part of the control signal, the generating of the control signal being performed in a baseband subsystem; and

adjusting an output power level of the power amplifier during a random access channel signal transmission based on the control signal, the control signal being configured so that the output power level is adjusted based on the comparison, the MAXDAC configured to allow generation of a power profile for the random access channel signal transmission.

13. The method of claim 12 wherein adjusting the output power level of the power amplifier includes increasing the output power level if the receive reference signal is below the threshold value.

14. The method of claim 12 wherein adjusting the output power level of the power amplifier includes decreasing the output power level if the receive reference signal is above the threshold value.

15. The method of claim 12 wherein the adjusting of the output power level includes an adjustment by a selected offset amount.

16. The method of claim 15 wherein the selected offset amount is between −

1 dB and +1 dB.

17. The method of claim 12 wherein the generating of the control signal is performed in a radio frequency (RF) circuit.

18. The method of claim 12 wherein the strength of the received RF signal includes a power level of the received RF signal.

19. The method of claim 12 wherein the generating of the control signal includes generating an analog representation of a digital control signal representative of the output power level.

20. The method of claim 19 wherein the analog representation includes a maximum value of the output power level.