METHOD FOR IMPROVING TX GAIN IN ENVELOPE TRACKING SYSTEMS

A method and system enhances the gain of a propagation path of a radio frequency (RF) signal while utilizing an envelope tracking (ET) mechanism to provide power to a power amplifier within the propagation path. An envelope tracking (ET) controller detects using the ET mechanism an RF envelope of th...

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Bibliographische Detailangaben
Hauptverfasser:	GOEDKEN RYAN J, BLACK GREGORY R, NAGODE THOMAS D
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CONTROL OF AMPLIFICATION ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION
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Beschreibung
Zusammenfassung:	A method and system enhances the gain of a propagation path of a radio frequency (RF) signal while utilizing an envelope tracking (ET) mechanism to provide power to a power amplifier within the propagation path. An envelope tracking (ET) controller detects using the ET mechanism an RF envelope of the RF signal being propagated towards the power amplifier. The ET controller applies envelope pre-distortion to the RF signal. The ET controller initiates a function for shaping the supply voltage of the power amplifier by selecting a shaping table that can provide a specific level of increasing amplifier gain at higher signal drive level. The ET controller shapes the supply voltage for the power amplifier by adjusting values corresponding to the detected RF envelope. As a result, RF signals are propagated from the transceiver to the power amplifier output port across high and low transceiver drive levels with net constant gain.