Digital Pre-distortion Technology For Optimization Design Of VDB Transmitter

Zhiqiang Zhang, Yan Wang, Ronglin Liu, Xiaodong Kang, Qiushi Guo

Abstract


Due to the nonlinear distortion of the power amplifier, the problems of in-band distortion and Adjacent Channel Interference will occur in VDB transmitter .To address the problem ,this paper introduces a digital pre-distortion method based on memoryless polynomial model ,which can solve the coefficients of digital pre-distorter with indirect learning structure. The results show that the digital pre-distortion method can effectively improve the third-order intermodulation distortion, the adjacent channel power ratio (ACPR) and the error vector amplitude (EVM) of VDB transmitter, and it can also improve the performance and efficiency of the communication system.


Keywords


VDB Transmitter; Memoryless Polynomial; Digital Pre-distortion

Full Text:

PDF

Included Database


References


Wu L, Xia W. Research on nonlinear characteristics and predistortion of power amplifier. Computer Simulation 2014; 10(15): 250-255.

Liu Y, Liu G, Asbeck PM. High-order modulation transmission through frequency quadrupler using digital predistortion. IEEE Transactions On Microwave Theory And Techniques 2016; 64(6): 1896-1910.

Zhu A, Draxler PJ, Yan J, et al. Open-loop digital predistorter for RF power amplifiers using dynamic deviation reduction-based Vol-terra series. IEEE Transactions on Microwave Theory and Techniques 2008; 56(7): 1524–1534.

Muhonen KJ, Kavehrad M, Krishnamoorthy R. Look-up table techniques for adaptive digital predistortion: A development and comparison. IEEE Transactions on Vehicular Technology 2000; 49(9): 1995–2002.

Zhang S. Study on digital predistortion modeling of power amplifiers. Wuhan: Wuhan University of Technology; 2015.

Zhang S, Li Y. Research on memory adaptive pre-distortion for power amplifier in OFDM systems. Audio Engineering 2013; 5(2): 171-174.

Cao Y. Design of digital preimstortion using orthogonal polynomials. Jiangsu: Southeast University; 2015.

Zhu Q, Lu H. Pilot based channel estimation in IEEE. Journal of China Universities of Posts and Telecommunications 2005; 12(1): 41-46.

RTCA, Inc. GNSS-Base Precision Approach Local Area Augmentation System (LAAS) Signal-in-Space Interface Control Document (ICD): RTCA DO-246D. USA; 2008.

Saleh AM. Frequency-independent and frequency-dependent non linear models of TWT amplifiers. IEEE Trans. Commun 1981; 29: 1715–1720.




DOI: https://doi.org/10.18686/esta.v8i2.177

Refbacks

  • There are currently no refbacks.


Copyright (c) 2021 Zhiqiang Zhang

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.