System and method for high performance coherent peak compression estimation

1. A system for estimating a peak compression of a wireless signal, the system comprising:

a reference signal generator configured to provide a reference signal, wherein the reference signal is associated with an ideally amplified and time aligned version of the wireless signal;

a gain error generator configured to provide a gain error signal, wherein the gain error signal is based at least on the reference signal and the wireless signal; and

a peak compression estimator configured to provide a compression detection signal based at least on the reference signal and the gain error signal.

2. The system of claim 1 , wherein the peak compression estimator is configured to provide the compression detection signal based at least on a plurality of window threshold values, wherein the plurality of window threshold values are based at least on a plurality of programmable window variables.

3. The system of claim 2 , wherein the programmable window variable are chosen at least to provide a coherent signal for sampling.

4. The system of claim 1 , wherein the peak compression estimator is configured to provide the compression detection signal based at least on a peak gain error value, wherein the peak gain error value is based at least on the reference signal and the gain error signal.

5. The system of claim 1 , wherein the peak compression estimator is configured to provide a compression detection signal based at least on a peak gain error value, wherein the peak gain error value is based at least on a plurality of window threshold values, wherein the plurality of window threshold values are based at least on a plurality of programmable window variables.

6. The system of claim 1 , wherein the peak compression estimator is configured to provide the compression detection signal lag based at least on a linear gain error value, wherein the linear gain error value is based at least on the reference signal and the gain error signal.

7. The system of claim 1 , wherein the peak compression estimator is configured to provide the compression detection signal based at least on a linear gain error value, wherein the linear gain error value is based at least on a plurality of window threshold values, wherein the plurality of window threshold values are based at least on a plurality of programmable window variables.

8. The system of claim 1 , wherein the compression detection flag is configured to indicate that peak compression in excess of a predetermined threshold has occurred.

9. The system of claim 1 , further comprising:

an antenna;

a power amplifier electrically coupled to the antenna, the power amplifier configured to provide varying levels of amplification; and

an amplification modification module configured to alter the amplification level of the power amplifier based at least on the compression detection signal.

10. The system of claim 9 , wherein the amplification modification module is configured to alter the amplification level of the power amplifier by a reduction in a power level of the power amplifier.

11. The system of claim 10 , wherein the amplification modification module is configured to alter the amplification level of the power amplifier by adjusting a bias level of the power amplifier.

12. The system of claim 10 , wherein the amplification modification module is configured to alter the amplification level of the power amplifier by adjusting a voltage supply level of the power amplifier.

13. The system of claim 1 , further comprising:

an antenna; and

an antenna tuner electrically coupled to the antenna, the antenna tuner configured to alter a tuning parameter for the antenna based at least on the compression detection signal.

14. The system of claim 1 , wherein the peak compression estimator is further configured to provide a peak compression estimate.

15. The system of claim 14 , further comprising a compression mitigation module configured to apply a peak compression mitigation algorithm based at least on the peak compression estimate.

16. The system of claim 15 , wherein the peak compression mitigation algorithm comprises a crest factor reduction algorithm.

17. A method for determining whether to adjust the power level of an antenna in a wireless communication device, the method comprising:

determining a plurality of window threshold values, wherein the plurality of window threshold values are based at least on a plurality of programmable window variables;

estimating a peak gain error;

estimating a linear gain error;

calculating a peak count value;

comparing the peak count value to a count threshold value;

comparing a difference between the peak gain error and the linear gain error to an error threshold value; and

if the difference between the peak gain error and the linear gain error is greater than the error threshold value, reducing the output power of the antenna.

18. The method of claim 17 , further comprising applying the peak gain error, the linear gain error, and the peak count value to a peak compression mitigation algorithm.

19. The method of claim 18 , wherein the peak compression mitigation algorithm comprises a crest factor reduction algorithm.

20. The method of claim 17 , wherein estimating the peak gain error comprises calculating an average of the signal peaks within a predetermined peak window.

21. The method of claim 17 , wherein estimating the linear gain error comprises calculating an average of the signal peaks within a predetermined mid window.