An apparatus and method for varying a signal in a...

Details An apparatus and method for varying a signal in a... An apparatus and method for varying a signal in a...

H - Electricity

04

B

H04B 7/005 (2006.01) H03C 3/40 (2006.01) H03F 1/32 (2006.01) H04B 1/04 (2006.01) H04L 27/20 (2006.01)

Patent

CA 2069476

An apparatus and method for linearizing the gain of a nonlinear power amplifier (115) in a IDM digital transceiver. The power amplifier's transfer function describes a relationship between its input signal and output signal. The output signal is selectively demodulated, substantially with existing receiver elements, during the transmit time slot of a TDM time frame. An inverse transfer function is determined from the nominal gain of the power amplifier (115) and the transfer function. A collection value, corresponding to the transfer function and its inverse, is determined in a vector table. The correction value is multiplied with the input signal resulting in an adjusted input signal. The amplified adjusted input signal produces a varied output signal that is linear to relative to the input signal.

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