AI DPD for High-Efficiency PAs

The next jump in radio-unit energy efficiency comes from coupling more aggressive PA architectures (envelope tracking, polar, hybrid) with DPD that can keep up with their nonlinearities. Classical polynomial DPD struggles when the PA’s behavior is no longer well-behaved across the envelope, which is exactly the regime envelope-tracked high-efficiency PAs operate in. AI-based DPD, trained on representative measurements, fills the gap.

This is a current focus area at Samsung: developing AI DPD solutions for challenging high-efficiency PA architectures targeting commercial radio units, with a body of patent and patent-application work covering the algorithms, envelope-tracking schemes, and PA-aware modulation/scheduling that supports them.

Selected publications

• AI-Based Digital Pre-Distortion for Digital Envelope Tracking Power Amplifiers — U.S. Patent Application (2025). AI DPD designed specifically for digital envelope-tracking PA architectures.
• Non-Uniform Discrete Envelope Tracking — U.S. Patent Application (2026). Discrete-level envelope tracking with non-uniform spacing.
• Non-Periodic Digital Envelope Tracking for Power Amplifiers — U.S. Patent Application (2026). Non-periodic envelope-tracking variant.
• Adaptive Multi-Level Envelope Tracking Design for Digital Envelope Trackers — U.S. Patent Application (2026). Adaptive multi-level ET design.
• Power Amplifier-Aware Modulation — U.S. Patent 12,542,570 (2026). Modulation choices made jointly with the PA’s operating point. Granted patent.
• Power Amplifier Efficiency Based Resource Scheduler — U.S. Patent Application (2026). Scheduler that takes PA efficiency into account as a first-class objective.