Download now Free registration required
This paper considers the compensation of time misalignment between RF and envelope signals of Envelope Tracking (ET) amplifier. In particular, the authors propose methods to compensate the time misalignment and compare them to a previously presented method. Their simulation results indicate that the proposed methods give very accurate timing estimates. In the presence of optimal predistorter, they achieve with 90 percent probability Adjacent Channel Power (ACP) level of -80 dB. With adaptive predistorters, they cannot see any degradation of ACP comparing to case of ideal timing. On the other hand, the proposed methods give roughly 10 dB better ACP than the previously presented method.
- Format: PDF
- Size: 383.4 KB