Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.
When supply modulation and contour modulation are working in concert, the dynamic range and efficiency of the power amplifier can be further improved.
当电源调制和轮廓调制协同工作时，功率放大器的动态范围和效率可以进一步提高。
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In the transmit direction, the transceiver provides RF signals to the power amplifier, which amplifies the signals based on gain and ramp information for a given modulation type.