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Pre-distortion in RF path in combination with shaping table in envelope path for envelope tracking amplifier
Pre-distortion in RF path in combination with shaping table in envelope path for envelope tracking amplifier
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机译:射频路径中的预失真结合包络路径中的整形表,用于包络跟踪放大器
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摘要
There is disclosed a method of controlling an envelope tracking amplification stage comprising an envelope modulated power supply, the method comprising: determining a shaping function to be applied to an envelope signal for controlling the envelope modulated power supply in dependence on a system linearity objective in a region of operation of the amplifier in which the output power of the amplifier is dependent upon the supply voltage; and determining a pre-distortion function to be applied to an input signal to be amplified in dependence on a further linearity objective of the system, in a region of operation of the amplifier in which the output of the amplifier is dependent upon the input power to the amplifier.
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