System and method for RF power control

• US 20050136869A1
• Filed: 12/19/2003
• Published: 06/23/2005
• Est. Priority Date: 12/19/2003
• Status: Active Grant

• Current Assignee: Accton Technology Corporation
• Original Assignee: Accton Technology Corporation
• Inventors: Liu, I-Ru
• Granted Patent: US 7,366,483 B2
• Time in Patent Office: Days
• US Class Current: 455/127.200
• CPC Class Codes: H03G 3/004 Control by varying the supply voltage
• CPC Class Codes: H04B 2001/0416 having gain or transmission power control
• CPC Class Codes: H04W 52/267 taking into account the information rate

Abstract

The present invention provides a system and method for radio frequency (RF) power control that can adjust and transmit the RF power to the transmitting device according to the data rate under which the RF signal is going to transmit.

Claims

1. A system for radio frequency (RF) power control comprising:

a control unit for generating a control signal according to a data rate;

a transmitting unit for transmitting a RF signal; and

a power supply unit, coupled to the control unit, for providing power to the transmitting unit according to the control signal.

2. The system of claim 1, wherein the RF signal is a wireless local area network (WLAN) signal.

3. The system of claim 1, wherein the control signal provides a data rate indicator for assigning the data rate to a predetermined rate range.

4. The system of claim 1, wherein the transmitting unit comprises:

a power-amplifying unit for receiving the power and an inlet RF signal, and amplifying the inlet RF signal to output the RF signal.

5. The system of claim 1, wherein the power supply unit comprises:

a switching device for switching an output of the power according to the control signal.

6. The system of claim 5, wherein the power supply unit further comprises:

a voltage adjusting device for adjusting a voltage level of the power.

7. The system of claim 5, wherein the power supply unit further comprises:

a current adjusting device for adjusting a current level of the power.

8. The system of claim 1, wherein the power supply unit at least provides a high power corresponding to a high data rate, and a low power corresponding to a low data rate.

9. The system of claim 1, wherein the control unit is built in a baseband processor/media access control (BBP/MAC).

10. A method for radio frequency (RF) power control comprising:

selecting a data rate;

generating a control signal according to the selected data rate;

adjusting and providing power according to the control signal; and

transmitting a RF signal in response to the power.

11. The method of claim 10, wherein the control signal provides a data rate indicator for assigning the data rate to a predetermined rate range.

12. The method of claim 10, wherein the RF signal is a wireless local area network (WLAN) signal.