论文信息 - A 2-D Simplified Memory Polynomial Model for Concurrent Dual-Band Power Amplifiers

A 2-D Simplified Memory Polynomial Model for Concurrent Dual-Band Power Amplifiers

A 2-D simplified memory polynomial (2D-SMP) model is proposed for concurrent dual-band power amplifiers (PAs) in this letter. The derivation of the proposed model is similar to that of the 2-D modified memory polynomial (2D-MMP) model. The 2D-SMP model consists of an in-band part and a cross-band modulation part without the envelope factors, which exist in the 2D-MMP model. Theoretical analysis shows that it has moderate complexity but higher modeling accuracy than the 2D-MMP model. The simple least square algorithm can be used to extract the model coefficients, and the additional binary search algorithm for the best envelope factor is not needed. The experimental results show that the 2D-SMP model can achieve higher model accuracy and better digital predistortion (DPD) performance than the 2D-MMP model when a dual-band PA is excited by a combined dual-band long-term evolution signal.

[1] 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.

[2] Anding Zhu,et al. Preparing Linearity and Efficiency for 5G: Digital Predistortion for Dual-Band Doherty Power Amplifiers with Mixed-Mode Carrier Aggregation , 2017, IEEE Microwave Magazine.

[3] Patrick Roblin,et al. Concurrent dual-band digital predistortion for power amplifier based on orthogonal polynomials , 2013, 2013 IEEE MTT-S International Microwave Symposium Digest (MTT).

[4] Robert W. Heath,et al. Five disruptive technology directions for 5G , 2013, IEEE Communications Magazine.

[5] 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.

[6] 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.

[7] Zhenghe Feng,et al. Linearization of Concurrent Dual-Band Power Amplifier Based on 2D-DPD Technique , 2011, IEEE Microwave and Wireless Components Letters.