A 2-D Envelope Combination Selective Affine Function-Based Behavioral Model for Concurrent Dual-Band Power Amplifiers

A novel 2-D envelope combination selective affine function-based (2D-ECSA) behavioral model is proposed for linearization of the concurrent dual-band power amplifiers (PAs). The core of the model is to use two independent envelope combination selective affine (ECSA) functions to replace the high-order terms composed of the input envelopes of the existing 2-D simplified memory polynomial (2D-SMP) model, respectively. The proposed 2D-ECSA model can be regarded as the superposition of two linear structures, which can further reduce the computational complexity and the actual hardware resource occupation of the 2D-SMP model. Experimental results fully demonstrate that compared with the original model, the proposed model can provide similar normalized mean square error (NMSE) and digital predistortion (DPD) performance when a PAis driven by two concurrent 20-MHz signals.

[1]  Zhenghe Feng,et al.  2-D Magnitude-Selective Affine Function-Based Digital Predistortion for Concurrent Dual-Band Terminal Power Amplifiers , 2021, IEEE Transactions on Microwave Theory and Techniques.

[2]  Lei Zhang,et al.  A 2-D Simplified Memory Polynomial Model for Concurrent Dual-Band Power Amplifiers , 2020, IEEE Microwave and Wireless Components Letters.

[3]  Zhe Chen,et al.  A 2-D-Canonical Piecewise Linear Function-Based Behavioral Model for Concurrent Dual-Band Power Amplifiers , 2018, IEEE Microwave and Wireless Components Letters.

[4]  Anding Zhu,et al.  Instantaneous Sample Indexed Magnitude-Selective Affine Function-Based Behavioral Model for Digital Predistortion of RF Power Amplifiers , 2018, IEEE Transactions on Microwave Theory and Techniques.

[5]  Anding Zhu,et al.  Magnitude-selective affine function based digital predistorter for RF power amplifiers in 5G small-cell transmitters , 2017, 2017 IEEE MTT-S International Microwave Symposium (IMS).

[6]  F. M. Ghannouchi,et al.  2-D Digital Predistortion (2-D-DPD) Architecture for Concurrent Dual-Band Transmitters , 2011, IEEE Transactions on Microwave Theory and Techniques.

[7]  Christian Fager,et al.  A Comparative Analysis of the Complexity/Accuracy Tradeoff in Power Amplifier Behavioral Models , 2010, IEEE Transactions on Microwave Theory and Techniques.

[8]  Jie Zhou,et al.  Digital Predistortion for Concurrent Dual-Band Transmitters Using 2-D Modified Memory Polynomials , 2013, IEEE Transactions on Microwave Theory and Techniques.