| 主权项 |
1. A transmitter configured to broadcast an amplified signal capable of being demodulated at a receiver having a front-end section and a demodulator section, said transmitter comprising:
a peak controller which controls a peak-to-average-power ratio (PAPR) parameter of a peak-reduced signal by adjusting an amount of peak-reduction noise combined with a modulated signal in said peak controller to form said peak-reduced signal; an amplifier section coupled to said peak controller and configured to apply amplification to said peak-reduced signal at a controllable input power backoff level and corresponding degree of linearity and to generate said amplified signal; a backoff controller coupled to said amplifier section, said backoff controller being configured to continuously adjust said input power backoff level of said amplifier section to maximize said amplification while maintaining a predetermined degree of linearity; an equilibrium estimator coupled to said peak controller, said equilibrium estimator being configured to provide an estimate of an equilibrium point at which:
a reduced signal-to-noise ratio at said demodulator section of said receiver results from increasing a signal-to-noise ratio in said amplified signal broadcast from said transmitter; anda reduced signal-to-noise ratio at said demodulator section of said receiver also results from decreasing said signal-to-noise ratio in said amplified signal broadcast from said transmitter; wherein said peak controller is configured to combine an amount of said peak-reduction noise with said modulated signal that causes said transmitter to operate at said estimate of said equilibrium point. |
