Systems and methods for high power uplink transmission

1. A mobile device comprising:

an antenna configured to transmit frequency division duplex radio frequency signals to a base station via a frequency division duplex uplink and receive frequency division duplex radio frequency signals from the base station via a frequency division duplex downlink; and

a front end system coupled to the antenna and configured to transmit and receive the frequency division duplex radio frequency signals from the antenna, the front end system further configured to transmit data on the frequency division duplex uplink at a first power level that is higher than a predetermined level and at a finite duty cycle.

2. The mobile device of claim 1 wherein the front end system is further configured to continuously receive data on the frequency division duplex downlink.

3. The mobile device of claim 1 wherein the predetermined level is a power limit that is equal to or less than a limit set by a communication standard under which the frequency division duplex radio frequency signals are implemented.

4. The mobile device of claim 1 wherein an average power level of the radio frequency signals transmitted on the frequency division duplex uplink is less than the predetermined level.

5. The mobile device of claim 1 wherein the front end system includes a power amplifier configured to amplify the frequency division duplex radio frequency signals provided to the antenna, a low noise amplifier configured to receive the frequency division duplex radio frequency signals received from the base station, and a duplexer coupling the power amplifier and the low noise amplifier to the antenna.

6. The mobile device of claim 5 wherein the duplexer is configured to handle additional transmit power received from the power amplifier and increase isolation between the power amplifier and the low noise amplifier to suppress leakage from the power amplifier into the low noise amplifier.

7. The mobile device of claim 1 wherein the front end system is further configured to increase a data rate of the frequency division duplex radio frequency signals transmitted via the frequency division duplex uplink by increasing the order of modulation of the radio frequency signals.

8. The mobile device of claim 1 wherein the front end system is further configured to transmit the data on the frequency division duplex uplink at the first power level in response to determining that transmitting the data on the uplink at a second power level that is less than the predetermined level would result in either data rate or call drops.

9. A front end system comprising:

a power amplifier configured to amplify a transmit frequency division duplex radio frequency signal;

a low noise amplifier configured to receive a receive frequency division duplex radio frequency signal; and

an antenna switch module configured to selectively connect the power amplifier and the low noise amplifier to an antenna, the front end system configured to transmit data on a frequency division duplex uplink to a base station at a first power level that is higher than a predetermined level and at a finite duty cycle.

10. The front end system of claim 9 further configured to continuously receive data on a frequency division duplex downlink with the base station.

11. The front end system of claim 9 wherein the predetermined level is a power limit that is equal to or less than a limit set by a communication standard under which the frequency division duplexing is duplex radio frequency signals are implemented.

12. The front end system of claim 9 wherein an average power level of the frequency division duplex radio frequency signals transmitted on the frequency division duplex uplink is less than the predetermined level.

13. The front end system of claim 9 further comprising a duplexer coupling the power amplifier and the low noise amplifier to the antenna via the antenna switch module.

14. The front end system of claim 13 wherein the duplexer is configured to handle additional transmit power received from the power amplifier and increase isolation between the power amplifier and the low noise amplifier to suppress leakage from the power amplifier into the low noise amplifier.

15. The front end system of claim 9 further configured to increase a data rate of the frequency division duplex radio frequency signals transmitted via the frequency division duplex uplink by increasing the order of modulation of the frequency division duplex radio frequency signals.

16. The front end system of claim 9 further configured to transmit the data on the frequency division duplex uplink at the first power level in response to determining that transmitting the data on the frequency division duplex uplink at a second power level that is less than the predetermined level would result in either data rate or call drops.

17. A method comprising:

determining to communicate with a base station using high power frequency division duplexing; and

transmitting a frequency division duplex radio frequency signal to the base station via an uplink at a first power level that is higher than a predetermined level and at a finite duty cycle.

18. The method of claim 17 further comprising continuously receiving data on a frequency division duplex downlink to the base station.

19. The method of claim 17 wherein the predetermined level is a power limit that is equal to or less than a limit set by a communication standard under which the frequency division duplex radio frequency signals are implemented.

20. The method of claim 17 wherein an average power level of the radio frequency division duplex frequency signals transmitted on the uplink is less than the predetermined level.