Patent ID: 6591090
Filing Date: 2003-07-08
Classification: H03F,H04B,H04L

Abstract:
A transmitter comprising:amplifier means for amplifying a received signal; digital predistortion means for predistorting the received signal prior to the signal passing through said amplifier means; transmitting means for transmitting said signal; control means for controlling said transmitter, whereby if the power level of the signal to be transmitted by the transmitter means is below a predetermined level, the signal is not predistorted by said digital predistortion means and if the power level of the signal to be transmitted by the transmitter means is above a predetermined level said received signal passes through said digital predistortion means and said amplifier means; and digital gain control means for applying a gain to the signal prior to the signal being input to the digital predistortion means; whereby said digital control means is used to control the power of the signal to be transmitted.