基於查表方式做不同內插法之適應性放大器預失真

以作者查詢圖書館館藏

、以作者查詢臺灣博碩士

、以作者查詢全國書目

、勘誤回報

、線上人數：35

、訪客IP：3.17.174.239

姓名

古世丞(Shih Cheng Ku) 查詢紙本館藏

畢業系所

通訊工程學系在職專班

論文名稱

基於查表方式做不同內插法之適應性放大器預失真
(LUT Based Adaptive Predistortion for PA with Different Interpolation Methods)

相關論文

★ 利用二元關聯法之簡易指紋辨識	★ 使用MMSE等化器的Filterbank OFDM系統探討
★ Kalman Filtering應用於可適性載波同步系統之研究	★ 無線區域網路之MIMO-OFDM系統設計與電路實現
★ 包含通道追蹤之IEEE 802.11a接收機設計與電路實現	★ 時變通道下的OFDM傳輸系統設計: 基於IEEE 802.11a標準
★ MIMO-OFDM系統各天線間載波頻率偏差之探討與收發機硬體實現	★ 使用雜散式領航訊號之DVB-T系統通道估測演算法與電路實現
★ 數位地面視訊廣播系統同步模組之設計與電路實現	★ 適用於移動式正交分頻多工通訊系統的改良型時域通道響應追蹤演算法
★ 正交分頻多工系統通道估測基於可適性模型化通道參數估測	★ 以共同項載波頻率偏移補償於正交分頻多重存取系統中減少多重存取干擾之方法
★ 正交分頻多工系統之資料訊號裁剪雜訊消除	★ 適用於正交分頻多工通訊系統的改良型決策反饋之卡爾曼濾波通道估測器
★ 半盲目通道追蹤演算法使用於正交分頻多工系統	★ 正交分頻多重存取以共同項載波頻率偏移補償以達到最小均方誤差之方法

檔案

[Endnote RIS 格式]

[Bibtex 格式]

[相關文章]

[文章引用]

[完整記錄]

[館藏目錄]

[檢視]

[下載]

本電子論文使用權限為同意立即開放。
已達開放權限電子全文僅授權使用者為學術研究之目的，進行個人非營利性質之檢索、閱讀、列印。
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。

摘要(中)

在過去，資料傳輸的速率及訊號品質皆遠不及現今處處普及之4G 與5G 的高速無線傳輸，原因之一為今日的無線通訊系統架構中，採用數位預失真做為資料傳送端之訊號補償技術，儘管資料傳輸過程中的接收端和傳送端皆須有良好的訊號品質，但無線通訊系統中傳送端的基本訊號品質對傳輸速率之影響更鉅。近幾年來，已有多項關於數位預失真技術之研究，例如：多項式基頻數位預失真及查表式基頻數位預失真…等。在本研究中，將以查表式數位預失真技術為主，比較數種不同數位預失真架構及其差異，並且採用如LMS（Least Mean Square）、Interpolation、及Adaptive system…等相關的演算法，以獲得不同參數設定所呈現的模擬結果，進而探討在功率放大器加入PA Identification（功率放大器識別器）的技術，比較其相對應的成效及不同架構應用之優劣性，主要研究目的為使數位預失真的收斂速度可以有效的提高，且使功率放大器的輸出能夠更接近由系統傳送給功率放大器的原始輸入訊號，藉此研究結果優化整體數位預失真的收斂時間與功率放大器輸出的訊號品質。

摘要(英)

The data transmission rate and signal quality have been significantly improved in wireless transmission such as 4G and 5G nowadays. One of the reasons leading to better results is to adopt digital predistortion as the compensation technology for power amplifiers (PA) in the present wireless communication systems. Although during the process of data transmission, the receiver and the transmitter both have to be equipped with good signal quality, the signal quality of the transmitter in a wireless communication system has important influence on data transmission rate. In the recent years, there have been many studies on digital presdistortion technology such as polynomial baseband digital predistortion and
look-up-table digital predistortion and so on. In this study, look-up-table digital predistortion is considered with comparing several kinds of digital interpolation methods. In addition, some algorithms such as Least Mean
Square (LMS), interpolation, and the adaptive PA identification structure were applied in order to compare simulation results due to different parameter settings. This study also involves the technique of applying PA
identification for the PA. The main purpose of this study is to upgrade the convergence of digital predistortion more efficiently and to enable the output of the PA to be approach the original input signals.

關鍵字(中)

★ 預失真
★ 查表法
★ 內插法
★ 適應性
★ 功率放大器

關鍵字(英)

★ Pre-Distortion
★ Look-Up-Table
★ Interpolation
★ Adaptive
★ Power Amplifier

論文目次

中文摘要. . . . . . . . . . . . . . . . . . . . . . i
英文摘要 . . . . . . . . . . . . . . . . . . . . . iii
目錄. . . . . . . . . . . . . . . . . . . . . . . . i
圖目錄. . . . . . . . . . . . . . . . . . . . . . . ii
表目錄. . . . . . . . . . . . . . . . . . . . . . . iv
第1 章序論. . . . . . . . . . . . . . . . . . . . . 1
1.1 前言. . . . . . . . . . . . . . . . . . . . . . 1
1.2 章節架構 . . . . . . . . . . . . . . . . . . . . 3
第2 章數位預失真的基本架構. . . . . . . . . . . . . . 5
2.1 功率放大器之非線性特性. . . . . . . . . . . . . . 6
2.1.1 功率放大器之飽和特性. . . . . . . . . . . . . . 6
2.1.2 AM/AM 與AM/PM 特性 . . . . . . . . . . . . . . 7
2.2 功率放大器之預失真補償 . . . . . . . . . . . . . . 9
2.3 運用PA 逆函式導出Inverse LUT . . . . . . . . . . 10
2.4 基本自適應預失真架構建置. . . . . . . . . . . . . 15
第3 章學習PA 特性並找出初始查找表之方法. . . . . . . . 22
3.1 PA Model Identification 的架構. . . . . . . . . 23
3.2 運用直接學習架構方法建立初始LUT . . . . . . . . . 26
3.3 內插法的運用 . . . . . . . . . . . . . . . . . . 27
3.3.1 Linear Interpolation. . . . . . . . . . . . . 27
3.3.2 Previous Interpolation. . . . . . . . . . . . 29
3.3.3 Next Interpolation. . . . . . . . . . . . . . 30
3.3.4 Spline Interpolation. . . . . . . . . . . . . 31
3.3.5 Pchip Interpolation . . . . . . . . . . . . . 34
第4 章系統模擬與結果分析. . . . . . . . . . . . . . . 36
4.1 無功率放大器識別器的初始查找表模擬 . . . . . . . . 38
4.1.1 模擬結果比較- 無PA Identification . . . . . . . 39
4.1.2 模擬加入內插法的結果比較- 無PA Identification . .43
4.2 功率放大器識別器置入初始查找表模擬. . . . . . . . .44
4.2.1 模擬結果比較- 有PA Identification . . . . . . .46
4.2.2 模擬加入內插法的結果比較- 有PA Identification . .49
4.3 比較不同查找表大小之影響. . . . . . . . . . . . . .50
第5 章結論. . . . . . . . . . . . . . . . . . . . . .58
參考文獻. . . . . . . . . . . . . . . . . . . . . . . 59

參考文獻

[1] W.-Y. Lo, “An improvement of digital modulated error vector magnitude,” National Chiao Tung University, Jun 2007.
[2] K.-F. Liang, J.-H. Chen, and Y.-J. E. Chen, “A quadratic interpolated lut-based digital predistortion technique for cellular power amplifiers,” IEEE Transactions on Circuits and Systems II: Express Briefs, vol. 61, no. 3, pp. 133–137, Mar 2014.
[3] F. Li, B. Feuvrie, Y. Wang, and Anne-Sophie.Bacquet, “A lut baseband digital pre-distorter for linearization,” ICDT 2012 : The Seventh International Conference on Digital Telecommunications, 2012.
[4] J. Cavers, “Amplifier linearization using a digital predistorter with fast adaptation and low memory requirements,” IEEE Transactions on Vehicular Technology, vol. 39, no. 4, pp. 374–382, Nov 1990.
[5] M. Faulkner, “Amplifier linearization using rf feesback and feedforward techniques,” IEEE Trans. Veh. Technol., vol. 47, pp. 209–215, Feb 1998.
[6] P. B. Kenington and D. W. Bennett, “Linear distortion correction using a feedforward system,” IEEE Trans. Veh. Technol., vol. 45, pp. 74–81, Feb 1996.
[7] A. H. Coskun and S. Demir, “A mathematical characterization and analysis of a feedforward circuit for cdma applications,” IEEE Trans. Microwave Theory Tech., vol. 51, pp. 767–777, Mar 2003.
[8] G. Hau, T. Nishimura, and N. Iwata, “A highly efficient linearized wide-band cdma handset power amplifier based on predistortion under various bias conditions,” IEEE Trans. Microwave Theory Tech., vol. 49, pp. 1194–1201, Jun 2001.
[9] H. H. Chen, C. H. Lin, P. C. Huang, and J. T. Chen, “Joint polynomial and look-up-table predistortion power amplifier linearization,” IEEE Trans. on Circuit and Systems, vol. 53, Aug 2006.
[10] S. P. Stapleton, G. S. Kandola, and J. K. Cavers, “Simulation and analysis of an adaptive predistorter utilizing a complex spectral convolution,” IEEE Trans. Veh. Technol, vol. 41, pp. 387–394, Nov 1992.
[11] K. C. Lee and P. Gardner, “Anovel digital predistorter technique using an adaptive neuro-fuzzy inference system,” IEEE Commun. Lett., vol. 7, pp. 55–57, Feb 2003.
[12] H. Besbes, T.Le-Ngoc, and H. Lin, “A fast polynomial predistorter for power amplifiers,” IEEE Global Telecomm. Conf., pp. 659–663, Jul 2001.
[13] J. Y. Hassani and M. Kamareei, “Quantization error improvement in a digital predistorter for rf power amplifier linearization,” in Proc. IEEE Veh. Technol Conf., pp. 1201–1204, 2001.
[14] H. L. Duc, B. Feuvrie, M. Pastore, and Y. Wang, “An adaptive cascaded ila- and dla-based digital predistorter for linearizing an rf power amplifier,” IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS, vol. 66, no. 3, pp. 1031–1041, Mar 2019.
[15] H. L. Duc, B. F. M. Pastorey, and Y. Wang, “An analysis of adaptive digital predistortion algorithms in rf power amplifier,” 2018 25th International Conference on Telecommunications (ICT), Jun 2018.
[16] S. Boumaiza, J. Li, M. Jaidane-Saidane, and F. Ghannouchi, “Adaptive digital/rf predistortion using a nonuniform lut indexing function with built-in dependence on the amplifier nonlinearity,” IEEE Transactions on Microwave Theory and Techniques, vol. 52, no. 12, pp. 1995–2002, Dec 2004.
[17] J. K. Cavers, “Optimum table spacing in predistorting amplifier linearizers,” IEEE Trans. Vehicular Tech., vol. 48, pp. 1699–1705, Sep 1999.
[18] ——, “Optimum indexing in predistorting amplifier linearizers,” 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion, vol. 2, pp. 676–680, 1997.

指導教授

張大中(Dah-Chung Chang)

審核日期

2019-7-1

推文