欠采样的射频发射机线性化方法 -- 西北工业大学学报,2016,34(5):857-862

	论文:2016,Vol:34,Issue(5):857-862
	引用本文：
	张烈, 冯燕. 欠采样的射频发射机线性化方法[J]. 西北工业大学学报
	Zhang Lie, Feng Yan. A Linear Approach for Radio Frequency Transmitter Using Under-Sampling[J]. Northwestern polytechnical university

欠采样的射频发射机线性化方法

张烈, 冯燕

西北工业大学电子信息学院, 陕西西安 710129

摘要:

提出一种在欠采样条件下的经过混合结构设计的射频发射机线性化方法。该方法基于欠采样频率选择性的非线性模型来校正调制器产生的镜像干扰信号以及射频功率放大器的互调失真信号。实验结果表明LTE的70 MHz双载波信号在发射机采样速率从491.52 Ms/s降低至122.88 Ms/s时使用该组合方法较之前方法有10 dB的归一化最小均方误差改善以及10 dB的邻道功率泄露比抑制改善。

关键词: 射频发射机正交调制器 I/Q不平衡射频功率放大器数字预失真欠采样递归最小二乘法

A Linear Approach for Radio Frequency Transmitter Using Under-Sampling

Zhang Lie, Feng Yan

School of Electronics and Information, Northwestern Polytechnical University, Xi'an 710129, China

Abstract:

A hybrid designed linear approach for radio frequency (RF) transmitter using under-sampling is proposed. It employs an under-sampled frequency-selective nonlinear model to correct the image interference signal caused by quadrature modulator and intermodulation distortion caused by RF amplifiers. Experiment results by a LTE 70 MHz double carriers signal showed that the proposed hybrid approach has 10 dB improvement in the normalized mean square error (NMSE) and 10 dB improvement in adjacent channel leakage ratio (ACLR) in comparison with previous method even the sampling rate of transmitter was set from 491.52 Ms/s to 122.88 Ms/s.

Key words: radio frequency transmitters quadrature modulator I/Q imbalance radio frequency amplifiers digital pre-distortion under-sampling recursive least squares flowcharting nonlinear models memory polynomial schematic diagrams normalized mean square error adjacent channel leakage ratio long term evolution LTE hybrid designed intermodulation distortion image interference signal convergence of numerical methods vectors constellation multi carriers wideband

收稿日期: 2016-03-17 修回日期:

DOI:

通讯作者: Email：

作者简介: 张烈(1981-),西北工业大学博士研究生,主要从事射频功率放大器行为建模与数字预失真研究。

相关功能

PDF(1864KB) Free

打印本文

把本文推荐给朋友

作者相关文章

张烈在本刊中的所有文章

冯燕在本刊中的所有文章


	参考文献:
	[1] 唐成凯,廉保旺,张玲玲. 卫星通信中动态神经网络预失真算法研究[J]. 西北工业大学学报, 2013, 31(1):34-39 Tang Chengkai, Lian Baowang, Zhang Lingling. Dynamic Neural Network Based Pre-Distortion in Satellite Communication[J]. Journal of Northwestern Polytechnical University, 2013, 31(1):34-39(in Chinese) [2] Frank W. Sampling Requirements for Volterra System Identification[J]. IEEE Signal Processing Letters, 1996, 3(9):266-268 [3] Zhu Y M. Generalized Sampling Theorem[J]. IEEE Trans on Circuits and Systems Ⅱ Analog and Digital Signal Processing, 1992, 39:587-588 [4] Zhu A, Draxler P, Yan J, Brazil T, Kimball D, Asbeck P. Openloop Digital Predistorter for RF Power Amplifiers Using Dynamic Deviation Reduction-Based Volterra Series[J]. IEEE Trans on Microwave Theory Techniques, 2008, 56(7):1524-1534 [5] Braithwaite R. Wide Bandwidth Adaptive Digital Predistortion of Power Amplifiers Using Reduced Order Memory Correction[C]//Proc of IEEE International Microwave Symposium, 2008:1517-1520 [6] Yu C, Guan L, Zhu E, Zhu A. Band-Limited Volterra Series Based Digital Predistortion for Wideband RF Power Amplifiers[J]. IEEE Trans on Microwave Theory Techniques, 2012, 60(12):4198-4208 [7] Ding L, Mujica F, Yang Z. Digital Predistortion Using Direct Learning with Reduced Bandwidth Feedback[C]//Proc of IEEE International Microwave Symposium, 2013:1-3 [8] Ma Y, Yamao Y, Akaiwa Y, Ishibashi K. Wideband Digital Predistortion Using Spectral Extrapolation of Band-Limited Feedback Signal[J]. IEEE Trans on Circuits and Systems I Regular Papers, 2014, 61(7):2088-2097 [9] Hammi O, Kwan A, Bensmida S, Morris K A, Ghannouchi F M. A Digital Predistortion System with Extended Correction Bandwidth with Application to LTE——A Nonlinear Power Amplifiers[J]. IEEE Trans on Circuits and Systems I Regular Papers, 2014, 61(12):3487-3495 [10] Kim Young Doo, Jeong Eui Rim, Lee Yong H. Adaptive Compensation for Power Amplifier Nonlinearity in the Presence of Quadrature Modulation/Demodulation Errors[J]. IEEE Signal Processing Letters, 2007, 55(9):4717-4721 [11] Anttila L, Handel P, Valkama M. Joint Mitigation of Power Amplifier and I/Q Modulator Impairments in Broadband Direct-Conversion Transmitters[J]. IEEE Trans on Microwave Theory Techniques, 2010, 58(4):730-739 [12] Cao H, Tehrani A, Fager C, Eriksson T, Zirath H. I/Q Imbalance Compensation Using a Nonlinear Modeling Approach[J]. IEEE Trans on Microwave Theory Techniques, 2006, 57(3):513-518 [13] Ding L, Ma Z, Morgan D R, Zierdt M, Zhou G. Compensation of Frequency-Dependent Gain/Phase Imbalance in Predistortion Linearization Systems[J]. IEEE Trans on Circuits and Systems I Regular Papers, 2008, 55(1):390-397 [14] Anttila L, Valkama M, Renfors M. Frequency-Selective I/Q Mismatch Calibration of Wideband Direct-Conversion Transmitters[J]. IEEE Trans on Circuits and Systems Ⅱ Express Briefs, 2008, 55(4):359-363 [15] Valkama M, Renfors M, Koivunen V. Blind Signal Estimation in Conjugate Signal Models with Application to I/Q Imbalance Compensation[J]. IEEE Signal Processing Letters, 2005, 12(11):733-736 [16] Nam W, Roh H, Lee J, Kang I. Blind Adaptive I/Q Imbalance Compensation Algorithms for Direct-Conversion Receivers[J]. IEEE Signal Processing Letters, 2012, 19(8):475-478

	相关文献:
	1．张烈, 冯燕.一种优化的神经网络数字预失真方法[J]. 西北工业大学学报, 2014,32(6): 967-973

邮编:710072 电话：029-88495455 Email：xuebao@nwpu.edu.cn

本系统由北京仁和汇智信息技术有限公司设计开发技术支持：info@rhhz.net