| 摘要 |
A feed forward amplifier network (100) employs a method (300) and apparatus for providing carrier cancellation in a feed forward amplifier circuit (101). A modulator (118, 120) modulates (303) an input signal (141) of the amplifier circuit (101) with a reference modulation based on a reference signal (143, 145) and a control signal (153, 155). The amplifier circuit (101) amplifies (305) the modulated signal, introducing nonlinear distortion in the process. A modulation determination circuit (107, 109, 115) determines (307) the reference modulation in the amplified signal and provides a determined signal to an adjustment circuit (105). A residual modulation detection circuit (139, 125, 127, 129) demodulates (313) the determined modulation to recover any residual modulation remaining in the determined signal and adjusts (317) the control signal (153, 155) to reduce the recovered residual modulation and to produce carrier cancellation in the determined signal.
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