Patent ID: 7382835

Claim:
A peak-to-average reduction and pre-distortion method for use with terminal radio in a wireless communication system to enhance the output power and performance of an amplifier, in wireless cellular, Personal Communication System (PCS), Wireless Area Network (LAN), line of sight microwave, military, and satellite communication systems and wired applications, the peak-to-average reduction and pre-distortion method comprising: find the peak-to-average ratio of transmit baseband in order to determine the amount of peak-to-average reduction; peak-to-average reduce the transmit baseband signal; amplitude pre-distort the peak-to-average reduced signal using data from a lookup table; use a feedback envelop signal from the output of the amplifier and the peak-to-average reduced baseband signal to adaptively update an amplitude pre-distortion lookup table; adaptively perform the lookup table adaptation at power up, power down, idle time, or active mode; analog switching the output of the transmitter to a dummy load during the amplitude lookup table adaptation at power up, idle mode, and power down; and using a control signal to control switching mode of an analog switch used at the output of the transmitter.