R&S®SMW-K541 Digital Predistortion

Combination with envelope tracking

With envelope tracking, the PA is often operated close to saturation to improve efficiency. The resulting distortions can be compensated by applying digital predistortion. The clearly structured block diagram of the R&S®SMW-K540 envelope tracking option integrates the predistortion block set (requires the R&S®SMW-K541 option). This enables a straightforward setup for testing power amplifiers with envelope tracking and predistortion. Two configurations are possible:

Envelope signal is calculated after applying predistortion to the I/Q samples

Envelope signal is calculated from the original I/Q samples

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