Envelope tracking system for MIMO
AssigneeNujira Limited
InventorGerard Wimpenny
Life of this patent
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Abstract
There is disclosed an amplifier arrangement comprising a plurality of amplifiers each arranged to amplify one of a plurality of different input signals, the arrangement comprising an envelope tracking modulator for generating a common power supply voltage for the power amplifiers, and further comprising an envelope selector adapted to receive a plurality of signals representing the envelopes of the plurality of input signals, and adapted to generate an output envelope signal representing the one of the plurality of envelopes having the highest level at a particular time instant as the input signal for the envelope tracking modulator.
Claims20
An amplifier arrangement comprising a plurality of amplifiers each arranged to amplify one of a plurality of different input signals, the arrangement comprising:
- a plurality of envelope processing stages each for receiving one of the plurality of different input signals and for generating a plurality of signals representing the envelope of said different input signals;
- an envelope tracking modulator for generating a common power supply voltage for the amplifiers;
- and
- an envelope selector adapted to receive the plurality of signals representing the envelopes of the plurality of different input signals from the respective envelope processing stages, and adapted to generate an output envelope signal representing the one of the plurality of envelopes having the highest level at a particular time instant as the input signal for the envelope tracking modulator.
A method of amplification in an amplifier arrangement comprising a plurality of amplifiers each arranged to amplify one of a plurality of different input signals, the method comprising:
- generating a plurality of signals representing the envelope of said different input signals;
- providing an envelope tracking modulator for generating a common power supply voltage for the amplifiers;
- and
- generating an output envelope signal representing the one of the plurality of signals representing the envelope of said different input signals having the highest level at a particular time instant as the input signal for the envelope tracking modulator.
Dependencies are inferred from the claim text.