曹恆偉臺灣大學：電信工程學研究所陳重均Chen, Chung-ChunChung-ChunChen2007-11-272018-07-052007-11-272018-07-052004http://ntur.lib.ntu.edu.tw//handle/246246/58576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。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.Contents Chapter 1 Introduction 1 1.1 Motivation 1 1.2 Content 2 Chapter 2 Polar Transmitter Architecture 5 2.1 Traditional Transmitter 5 2.2 Envelope Elimination and Restoration (EER) 9 2.3 Component of Polar Transmitter 12 2.4 Challenge of Polar Transmitter 13 Chapter 3 Close Loop Envelope Modulator Architecture applied to EDGE Overview 15 3.1 EDGE Overview 15 3.1.1 Introduction to EDGE 15 3.1.2 EDGE modulation scheme 16 3.2 Bandwidth Consideration of EDGE Envelope 21 3.3 Design of Amplitude Locked Loop (ALL) 22 Chapter 4 Behavior Design and Simulation of Envelope Modulator for EDGE 25 4.1 Simulation Block Diagram of ALL 26 4.2 LC Filter and RC Filter Design 26 4.3 The Design of the gain value 28 4.4 Stability 30 4.5 Selection of Number of Bits 31 4.6 Behavior Simulation Result 33 4.6.1 Comparison of Envelope Modulators 33 4.6.2 Power Spectrum of RF Output of Polar Transmitter 33 4.6.3 EVM of RF Output of Polar Transmitter 35 Chapter 5 Open Loop Envelope Modulator Architecture applied to EDGE Overview 39 5.1 Architecture of Envelope Modulator 39 5.2 Architecture of Linear Regulator 41 5.2.1 The Choice of Power Transistor Q1 and Comparator OP1 42 5.2.2 Hand Calculation for Gain 42 5.2.3 The Design of Passive Component Value 43 Chapter 6 Circuit Design and Simulation of Envelope Modulator with Nonlinear Model for EDGE 45 6.1 Memory effect in nonlinear model 45 6.2 Simulation Block 46 6.3 Simulation Parameter and Design Step for Polar Transmitter including class-E PA 46 6.4 Nonlinear Model 52 6.5 Predistortion 57 6.6 Discussion of Digital Pre-distorter 59 6.6.1 Digitalable 59 6.6.2 Adaptive 59 6.6.3 The Design of Digital Predistorter 60 6.7 Simulation Result 63 Chapter 7 Conclusion and Future Work 69 7.1 Conclusion 69 7.2 Future Work 71 7.2.1 System Specification 72 7.2.2 The design challenge in WCDMA 72 Appendix 75 A1. The data sheet of the BCP69 power transistor of Philips Semiconductors. 75 A2. Simulation block of polar transmitter in Simulink environment. 76 A3. Simulation block of polar transmitter without predistortion in ADS environment. 77 A4. Simulation block of polar transmitter with predistortion in ADS environment. 77 A5. Simulation block of linear regulator in ADS environment. 78 References 792100648 bytesapplication/pdfen-US極座標發射機預失真振幅鎖定迴路封包調變器envelope modulatorALLAmplitude Locked Looppredistortionpolar transmitterthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/58576/1/ntu-93-R91942079-1.pdf