DOI: 10.1109/TMTT.2024.3450718   IEEEXplore: https://ieeexplore.ieee.org/document/10666271

Digital Predistortion Method that Combines Novel Kernel Function Sharing and Coefficient Sharing Techniques to Reduce Hardware Complexity

3.2 GHz and 5.3 GHz for demonstration

Combined kernel function sharing and coefficient sharing applying a kernel-wise proximity-based coefficient sharing method significantly reduces the complexity of digital predistortion (DPD) hardware.

5G NR power amplifier applications for signals with dynamic resource block allocation.

-37.65 dB and -38.65 dB average linearization normalized mean square error (NMSE) for two test cases compared to -37.86 dB and -39.01 dB using the generalized memory polynomial method (GMP) DPD method with doubly orthogonal matching pursuit (DOMP) and -24.32 dB NMSE without DPD for one of the test cases. 61.6 % and 48.2 % reduction in storage complexity (# Coefficients) for the two test cases compared to the GMP method with DOMP. 56.9% reduction in diversity complexity (# Kernels) for the two test cases compared to the GMP method with DOMP.