Method and system for managing transmit power on a wireless communication network

1. A method for determining a maximum power reduction of an uplink signal, the uplink signal being transmitted on a carrier, the carrier having a range of frequencies, wherein frequencies outside of the carrier frequency range include adjacent channel regions, the method comprising:

identifying resource blocks of the carrier that have been allocated to transmit the uplink signal;

determining, based on the identified resource blocks, a power spectral density function;

determining a metric, the metric being based on a third order self-convolution of the power spectral density function;

determining a maximum power reduction for the adjacent channel regions based on the determined metric; and

reducing, by a wireless terminal, transmit power of the wireless terminal based on the determined maximum power reduction.

2. The method of claim 1 , wherein determining the metric comprises:

determining a function based on the third order self-convolution; and

determining the metric based on an integral of the determined function over frequency intervals of the adjacent channel regions.

3. The method of claim 1 , wherein determining the maximum power reduction comprises:

referencing a map of the metric to the maximum power reduction; and

based on the referencing step, determining the maximum power reduction that corresponds to the determined metric.

4. The method of claim 1 , wherein frequencies outside of the adjacent channel regions include spurious regions, wherein the determined metric is a first metric, wherein the determined function is a first function, the method further comprising,

determining a second function, the second function being based on a fifth order self-convolution of a function of the power spectral density;

determining a second metric, the second metric being based on an integral of the second function over frequency intervals of the spurious regions; and

determining a maximum power reduction for the spurious regions based on the determined second metric.

5. The method of claim 4 , wherein determining the second metric comprises:

referencing a map of the second metric to the maximum power reduction for the spurious regions; and

based on the referencing step, determining the maximum power reduction for the spurious regions that is mapped to the determined second metric.

6. The method of claim 4 , further comprising determining the maximum of the adjacent channel maximum power reduction and the spurious region maximum power reduction.

7. The method of claim 2 , wherein a first portion of the adjacent channel regions is at a lower frequency than the carrier, and a second portion of the adjacent channel regions is at a higher frequency than the carrier.

8. The method of claim 1 , further comprising setting an uplink power based on the determined maximum power reduction.

9. The method of claim 1 , further comprising computing a maximum configured power based on the determined maximum power reduction.

10. The method of claim 1 , further comprising computing a power headroom based on the determined maximum power reduction.

11. A method for determining a maximum power reduction of an uplink signal, the uplink signal being transmitted on a carrier, the carrier having a range of frequencies, wherein frequencies outside of the carrier frequency range include spurious regions, the method comprising:

identifying resource blocks of the carrier that have been allocated to transmit the uplink signal;

determining, based on the identified resource blocks, a power spectral density function;

determining a metric, the metric being based on a fifth order self-convolution of the power spectral density function;

determining a maximum power reduction for the spurious regions based on the determined metric; and

reducing, by a wireless terminal, transmit power of the wireless terminal based on the determined maximum power reduction.

12. The method of claim 11 , wherein determining the metric comprises:

determining a function based on the fifth order self-convolution; and

determining the metric based on an integral of the determined function over frequency intervals of the spurious regions.

13. The method of claim 11 , wherein determining the maximum power reduction comprises:

referencing a map of the metric to the maximum power reduction; and

based on the referencing step, determining the maximum power reduction that corresponds to the determined metric.

14. The method of claim 11 , wherein frequencies inside of the spurious regions include adjacent channel regions, wherein the determined metric is a first metric, wherein the determined function is a first function, the method further comprising,

determining a second function, the second function being based on a third order self-convolution of a function of the power spectral density;

determining a second metric, the second metric being based on an integral of the second function over frequency intervals of the adjacent channel regions; and

determining a maximum power reduction for the adjacent channel regions based on the determined second metric.

15. The method of claim 14 , wherein determining the second metric comprises:

referencing a map of the second metric to the maximum power reduction for the adjacent channel regions; and

based on the referencing step, determining the maximum power reduction for the adjacent channel regions that is mapped to the determined second metric.

16. The method of claim 14 , further comprising determining the maximum of the adjacent channel maximum power reduction and the spurious region maximum power reduction.

17. The method of claim 15 , wherein a first portion of the spurious regions is at a lower frequency than the carrier, and a second portion of the spurious regions is at a higher frequency than the carrier.