Power control in ad-hoc wireless networks

1. A method of power control, comprising:

determining whether a wide-band interference is above or below a threshold;

sending a feedback signal, enabling closed-loop power control in response to determining the wide-band interference above the threshold;

disabling the closed-loop power control and filtering narrowband interference in response to determining the wide-band interference is below the threshold; and

sending a power feedback signal indicating a power transmission level when the closed-loop power control is enabled.

2. The method of claim 1 further comprising:

disabling open-loop power control in response to determining the wide-band interference above the threshold; and

enabling the open-loop power control in response to determining the wide-band interference is below the threshold.

3. The method of claim 1 , wherein the power feedback signal is a power-up command indicating an increase in power transmission level.

4. The method of claim 3 , wherein the power feedback signal is a power-up command when a quality parameter is less than a target quality parameter.

5. The method of claim 1 , wherein the power feedback signal is a power-down command indicating a decrease in power transmission level.

6. The method of claim 5 , wherein the power feedback signal is a power-down command when a quality parameter is greater than a target quality parameter.

7. A wireless terminal, comprising:

means for enabling a feedback signal for closed-loop power control in response to determining a wide-band interference above a threshold;

means for disabling the closed-loop power control and enabling narrow-band interference filtering in response to determining the wide-band interference is below the threshold; and

means for sending a power feedback signal indicating a power transmission level when the closed-loop power control is established.

8. The wireless terminal of claim 7 further comprising:

means for disabling open-loop power control in response to determining the wide-band interference above the threshold; and

means for enabling open-loop power control in response to determining the wide-band interference is below the threshold.

9. The wireless terminal of claim 7 , wherein the power feedback signal is a power-up command when a quality parameter is less than a target quality parameter.

10. The wireless terminal of claim 7 , wherein the power feedback signal is a power-down command when a quality parameter is greater than a target quality parameter.

11. A wireless terminal, comprising:

a receiver configured to determine a wide-band interference above a threshold and to filter narrow-band interference in response to determining the wide-band interference below the threshold;

a baseband processor configured to enable closed-loop power control in response to receiving a feedback signal detecting the wide-band interference, the baseband processor coupled to the receiver;

a transmitter configured to send a power feedback signal indicating a power transmission level when the closed-loop power control is enabled, the transmitter coupled to the baseband processor.

12. The wireless terminal of claim 11 wherein:

the baseband processor is configured to disable open-loop power control in response to detecting the wide-band interference above the threshold; and

the baseband processor is configured to enable the open-loop power control in response to determining the wide-band interference is below the threshold.

13. The wireless terminal of claim 11 , wherein the power feedback signal is a power-up command when a quality parameter is less than a target quality parameter.

14. The wireless terminal of claim 11 , wherein the power feedback signal is a power-down command when a quality parameter is greater than a target quality parameter.

15. Computer readable medium embodying a program of instructions executable by a computer program for enabling a method of closed-loop power control, said instructions comprising:

a computer readable program code means for enabling the closed-loop power control in response to receiving a feedback signal determining a wide-band interference above a threshold;

a computer readable program code means for disabling the closed-loop power control and filtering narrow-band interference in response to determining the wide-band interference is below the threshold; and

a computer readable program code means for sending a power feedback signal indicating a power transmission level when the closed-loop power control is established.

16. The instructions of claim 15 further comprising:

a computer readable program code means for disabling open-loop power control in response to determining the wide-band interference above the threshold; and

a computer readable program code means for enabling the open-loop power control in response to determining the wide-band interference is below the threshold.

17. The instructions of claim 15 , wherein the power feedback signal is a power-up command when a quality parameter is less than a target quality parameter.

18. The instructions of claim 15 , wherein the power feedback signal is a power-down command when a quality parameter is greater than a target quality parameter.

19. A method of power control, comprising:

detecting an interferer;

determining whether the interferer is a narrow-band interferer or a wide-band interferer, when the interferer is detected;

enabling close-loop power control when the wide-band interferer is determined; and,

disabling the close-loop control and filtering when the narrow-band interferer is determined.

20. The method of claim 19 , further comprising:

disabling the close-loop power control and enabling open-loop power control, when the interferer is not detected.