Beam-Dependent Digital Pre-Distortion for Wireless Antennas

The patent divides the DPD coefficient management into beam-specific segments. Instead of using a single unified set of DPD coefficients for all antenna elements across all beams, the system maintains separate DPD coefficient sets for each transmit beam. This segmentation allows each beam configuration to have its own optimized coefficients that account for the specific non-linearity characteristics of the antenna elements when configured for that particular beam, thereby resolving the contradiction between device complexity and compensation accuracy.

The patent implements dynamic DPD coefficient selection based on the active transmit beam configuration. The system dynamically switches between different DPD coefficient sets corresponding to different beam configurations. This dynamic approach allows the system to maintain high non-linearity compensation accuracy for each beam while managing complexity through automated beam-coefficient mapping, where the DPD engine automatically selects the appropriate coefficient set based on the current beam being transmitted.

The patent implements periodic DPD training and calibration procedures to maintain accurate DPD coefficients. The system performs DPD training at scheduled intervals and when beam configurations change, ensuring that the DPD coefficients remain accurate and up-to-date with current hardware characteristics. This periodic action balances reliability improvement through regular calibration with energy management by not continuously recalibrating, thus resolving the contradiction between maintaining coefficient accuracy and minimizing energy consumption.