Method and arrangement for a power amplifier
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsShu-Ang Zhou, Michael Faulkner
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Abstract
The present invention relates to an arrangement and a method for amplifying high frequency RF signals having amplitude and phase variations. The objective problem of the present invention is to provide an efficient power amplifier for amplifying high frequency RF signals. The object is achieved by introducing a Signal Conditioning Device (SCD) that converts baseband signals SI and SQ into tri-states signals STI, STQ. The tri-states signals STI, STQ are time multiplexed, which results in that a single power amplifier can be used to amplify the signal on the In-phase (I) channel and the signal on the Quadrature (Q) channel. Hence, the present invention does not require a power combiner.
Claims18
A power amplifier device comprising:
- means for separating a high frequency signal having both amplitude and phase variations into an In-phase (I) component signal (SI) and into a Quadrature (Q) component signal (SQ);
- a Signal Conditioning Device comprising:
- means for generating an n-state level I component signal (STI) from said I component signal (SI),
- means for generating an n-state level Q component signal (STQ) from said Q component signal (SQ), and
- means for interleaving the n-state level I component signal and the n-state level Q component signal into, a non-overlapping in time, I component signal (STI) and Q component signal (STQ);
- a multiplexer for generating a signal (SMIQ) with a high frequency carrier wave wherein the I and Q components are time multiplexed;
- and
- a single Power Amplifier for amplifying said signal (SMIQ).
A method for amplifying a high frequency signal having both amplitude and phase variations, comprising:
- separating said signal into an In-phase (I) component signal (SI) and into a Quadrature (Q) component signal (SQ),
- generating an n-state level I component signal from said I component signal (SI),
- generating an n-state level Q component signal from said Q component signal (SQ),
- interleaving the n-state level I component signal and the n-state level Q component signal into, a non-overlapping in time, I component signal (STI) and Q component signal (STQ);
- generating a signal (SMIQ) with a high frequency carrier wave wherein the I and Q components are being time multiplexed and
- amplifying said signal (SMIQ) using a single Power Amplifier, PA,.
Dependencies are inferred from the claim text.