A High-Performance Complexity Reduced Behavioral Model and Digital Predistorter for MIMO Systems With Crosstalk

作者：Abdelhafiz Abubaker; Behjat Laleh; Ghannouchi Fadhel M; Helaoui Mohamed; Hammi Oualid

来源：IEEE Transactions on Communications, 2016, 64(5): 1996-2004.

DOI：10.1109/TCOMM.2016.2545654

• Behavioral modeling
• condition number
• crossover memory polynomial model
• crosstalk
• digital predistortion
• fifth-generation networks
• model complexity
• multiple-input multiple-output (MIMO) transmitters
• power amplifier nonlinearities

In this paper, an augmented crossover memory polynomial model (A-COMPM) is proposed and developed which can be used for characterizing and linearizing multiple-input multiple-output (MIMO) transmitters in the presence of linear and nonlinear crosstalk. The proposed model significantly improves the performance of the crossover memory polynomial model (CO-MPM) by more accurately incorporating the effect of crosstalk. The proposed model performs comparably to the 2 x 2 parallel Hammerstein (2 x 2 PH) model, while requiring the same number of coefficients as CO-MPM and a lower number of coefficients than the 2 x 2 PH. The model was tested for forward modeling and digital predistortion (DPD) applications in the presence of both linear and nonlinear crosstalk. Experimental results show that the model outperforms the CO-MPM and 2 x 2 PH DPDs, at a lower number of coefficients compared to both models. Furthermore, the issue of numerical stability of the DPD extraction and implementation procedures is addressed in the model.

• 出版日期2016-5