一种新的分数阶记忆多项式预失真器

李波; 葛建华; 王勇

doi:10.3724/SP.J.1146.2007.02019

一种新的分数阶记忆多项式预失真器

doi: 10.3724/SP.J.1146.2007.02019

基金项目:

国家863计划项目(2006AA01Z270)资助课题

计量
- 文章访问数: 3590
- HTML全文浏览量: 111
- PDF下载量: 1219
- 被引次数: 0
出版历程
- 收稿日期: 2008-03-26
- 修回日期: 2009-05-11
- 刊出日期: 2009-08-19

A Novel Fractional Order Memory Polynomial Predistorter

摘要

摘要: 该文针对由记忆多项式设计的功率放大器预失真系统，提出了一种新的分数阶记忆多项式预失真器。提出预失真多项式是在常用记忆多项式基础上，通过去掉偶数阶项增加分数阶项以提高线性化性能。文中给出了分数阶记忆多项式的表达式，并给出了相应的系数估计算法。仿真分析表明，针对Wiener-Hammerstein和记忆多项式模型的功率放大器，在两种典型记忆多项式预失真的基础上可以分别得到10 dB和8 dB的带外谱抑制增益。相应的FPGA实现表明该预失真多项式总体硬件资源增加的代价并不高，易于在实际系统中应用。
- 正交频分复用;功率放大器;预失真;记忆多项式
Abstract: For the high power amplifier pedistorter using memory polynomial, a novel fractional order memory polynomial predistorter is proposed. The proposed predistortion polynomial is achieved by changing the even order term to fractional order term in the memory polynomial predistorter to improve the linearization performance. Computer simulations show that the proposed polynomial predistorter can get 10 dB and 8 dB out-band suppression gain based on two typical polynomial predistorters for Wiener-Hammerstein and memory polynomial power amplifier. FPGA realization shows that its increasing cost of hardware resources is acceptable, so easiness to implemented.

HTML全文

参考文献(1)

Gard K G, Gutierrez H M, and Steer M B. Characterizationof spectral regrowth in microwave amplifiers based on thenonlinear transformation of a complex Gaussian process[J].IEEE Transations on Microwave Theory Tech.1999, 47(7):1059-1069[2]Zhou G T and Kenney J S. Predicting spectral regrowth ofnonlinear power amplifiers[J].IEEE Transations onCommun.2002, 50(5):718-722[3]Conti A, Dardari D, and Tralli V. An analytical frameworkfor CDMA systems with a nonlinear amplifier and AWGN[J].IEEE Transations on Commun.2002, 50(7):1110-1120[4]Banelli P, Baruffa G, and Cacopardi S. Effects of HPAnonlinearity on frequency multiplexed OFDM signals[J].IEEE Transations on Broadcast.2001, 47(2):123-136[5]Mann S, Beach M, and Warr P, et al.. Increasing thetalk-time of mobile radios with efficient linear transmitterarchitectures[J].Electronics Communication Engineering.2001, 13(2):65-76[6]Muruganathan S D and Sesay A B. A QRD-RLS-basedpredistortion scheme for high-power amplifier linearization[J].IEEE Transations on Circuits and Systems-Ⅱ: Express Briefs.2006, 53(10):1108-1112[7]艾渤, 杨知行, 潘长勇等. 高功率放大器线性化技术研究[J].微波学报, 2007, 23(1): 63-70.Ai B, Yang Z X, and Pan C Y, et al.. Research on high poweramplifier linearization technique[J]. Journal of Microwaves,2007, 23(1): 63-70.[8]Ding L, Zhou G T, and Morgan D R, et al.. A robust digitalbaseband predistorter constructed using memorypolynomials[J].IEEE Transations on Commun.2004, 52(1):159-165[9]Lee K and Gardner P. Comparison of different adaptationalgorithms for adaptive digital predistortion based on EDGEstandard[C]. IEEE MTT-S Int. Microwave Symp. Dig., 2001,2: 1353-1356.[10]He Z Y, Ge J H, and Geng S J, et al.. An improved look-uptable predistortion technique for HPA with memory effects inOFDM systems[J].IEEE Transations on Broadcast.2006,52(1):87-91[11]Faulkner M and Mattsson T. Spectral sensitivity of poweramplifiers to quadrature modulator misalignment[J].IEEETransations on Veh. Technol.1992, 41(11):516-525[12]Ding L, Ma Z, and Morgan D R, et al.. A least-squares/Newton method for digital predistortion of widebandsignals[J].IEEE Transations on Commun.2006, 54(5):833-840[13]Morgan D R, Ma Z, and Kim J, et al.. A generalized memorypolynomial model for digital predistortion of RF poweramplifiers[J].IEEE Transations on Signal Processing.2006,54(10):3852-3860

施引文献

资源附件(0)

访问统计