應用於EDGE極座標發射機的封包調變器之探討

Envelope Modulator of Polar Transmitter for EDGE

陳重均(Chung-Chun Chen)

指導教授 ： 曹恆偉

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.01810

摘要

我們研究的無線通訊系統發射機架構稱作極座標發射機(polar transmitter)。這個架構不同於以往傳統的正交發射機(quadrature transmitter)。正如我們所知的，任意的基頻訊號分解為振幅與相位訊號然後再個別經過封包調變器與相位調變器。調變後的振幅與相位訊號再經由開關功率放大器來做結合與放大。在本論文中,我們將專注於極座標發射機裡的封包調變器在無線行動通訊系統的應用。

關鍵字

極座標發射機 ； 預失真 ； 振幅鎖定迴路 ； 封包調變器

並列摘要

The transmitter architecture with wireless communication system we investigated that is called the polar transmitter. This architecture is different from conventional quadrature transmitter. As we know, any input signal of baseband message is decomposed into magnitude and phase signal, and then goes through envelope modulator and phase modulator respectively. The modulated envelope and phase message signals are combined and amplified by switched-mode power amplifier. In this paper, we are going to focus on the envelope modulator of polar transmitter and the application of wireless mobile handset.

並列關鍵字

envelope modulator ； ALL ； Amplitude Locked Loop ； predistortion ； polar transmitter

參考文獻

[1] L. R. Kahn, “Single-sideband transmission by envelope elimination & restoration,” in Proc. IRE, July 1952, pp. 803–806.

[2] D. Su andW. J. McFarland, “An IC for linearizing RF power amplifiers using envelope elimination & restoration,” IEEE J. Solid-State Circuits, vol. 33, pp. 2252–2258, Dec. 1998, also ISSCC 1998.

[3] Pierce Nagle, “A Wide-Band Linear Amplitude Modulator for Polar Transmitters Based on the Concept of Interleaving Delta Modulation, ” IEEE J. Solid-State Circuits, vol. 37, pp. 1748–1756, Dec. 2002, also ISSCC 2002.

[9] A.A.M. Saleh, “Frequency-independent and frequency-dependent nonlinear models of TWT amplifiers,” Communications, IEEE Transactions on, vol. COM-29, pp.1715-1720, Nov. 1981

[4] Earl W. McCune, Santa Clara, Wendell Sander, Los Gatos, both of CA (US), High-efficiency power modulators, US patent 6,366,177, to Tropian Inc., Patent and Trademark Office, Washington, D.C., 2002.