An Interband Time-Delay Compensation Algorithm for Concurrent Dual-Band Power Amplifier Characterization

In this letter, an interband time-delay compensation algorithm that is based on correlation enhancement technique has been proposed to process the signals used for concurrent dual-band power amplifier (PA) characterization, where the characterization is a crucial step of behavioral modeling and digital predistortion (DPD) of the PA, and the interband time delay represents the difference of delay time between different channels. Compared with the traditional compensation method which adjusts the trigger or marker delay manually, the proposed method can work online and shows a higher performance. Finally, the modeling and DPD performance of a wideband PA, which works in concurrent dual-band mode, are evaluated to verify the feasibility and advantages of the proposed algorithm.