1. A High-Performance Complexity Reduced Behavioral Model and Digital Predistorter for MIMO Systems With Crosstalk.
- Author
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Abdelhafiz, Abubaker, Behjat, Laleh, Ghannouchi, Fadhel M., Helaoui, Mohamed, and Hammi, Oualid
- Subjects
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MIMO systems , *CROSSTALK , *TRANSMITTERS (Communication) , *COEFFICIENTS (Statistics) , *HAMMERSTEIN equations - Abstract
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 $2\times 2$ parallel Hammerstein ($2\times 2$ PH) model, while requiring the same number of coefficients as CO-MPM and a lower number of coefficients than the $2\times 2$ 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 $2\times 2$ 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. [ABSTRACT FROM PUBLISHER]
- Published
- 2016
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