曹恆偉臺灣大學：電信工程學研究所施維中Shih, Wei-ChungWei-ChungShih2007-11-272018-07-052007-11-272018-07-052004http://ntur.lib.ntu.edu.tw//handle/246246/58800我們提出一個操作在低頻帶（小於九百六十兆赫）之脈波式超寬頻收發機架構，主要使用於短距離、低複雜度以及低必v消耗之產品，如無線射頻識別卡與感應偵測網路。由於設計目標以低系統複雜度以及低成本為考量，使用最少的射頻或微波電路，幾近全數位的實現方法是可行的，以避免其他昂貴與必v需求極大之類比元件。 在本研究中，我們建立了完整的收發機模型，並將有興趣之關鍵要素，如窄頻干擾、多路徑衰減、頻率偏移、時脈抖動、類比數位轉換器之位元數與偏移以及非線性等加入系統模擬，以針對我們的設計做最佳化與利益取捨。 最後，模擬結果顯示我們所設計之收發機在短距離、低弁鈶野峇冗犑@表現令人滿意。We propose an impulse-radio ultra-wideband transceiver architecture operated in low band (<960MHz) for short range, low complexity, and low power applications such as radio frequency identification (RF-ID) and sensor network. Since the goal is toward low system complexity and low cost, a nearly “all-digital” implementation is feasible with minimal RF or microwave electronics, avoiding otherwise expensive and power hungry analog components. In this work, we construct the overall transceiver model and take key factors of concerns into system simulations to optimize and make trade-offs for our design, such as narrowband interference, multipath, frequency offset, jitter, A/D bits number, ADC offset, nonlinearity, and etc. Finally, the simulation results show that the transceiver we design works well for short range and low power applications.Chapter 1 Introduction 1 1.1 Motivation 1 1.2 Thesis Organization 1 Chapter 2 Ultra-Wideband (UWB) Technology 3 2.1 Overview 3 2.2 Advantages of UWB 4 2.2.1 Multipath Robustness 5 2.2.2 Large Channel Capacity and High Data Rate 7 2.2.3 Accuracy Positioning Capability 8 2.2.4 Low Cost 9 2.2.5 Low Transmit Power 9 2.3 Applications of UWB 9 2.4 Brief History 10 2.5 FCC Regulation 12 2.6 Pulse Shape 14 2.7 Modulation Schemes 16 2.7.1 Pulse Position Modulation (PPM) 16 2.7.2 On - Off Keying (OOK) 17 2.7.3 Pulse Amplitude Modulation (PAM) 17 2.7.4 Binary Phase Shift Keying (BPSK) 18 2.8 Multiple Access 19 2.9 “New” UWB technology 19 2.9.1 MB-OFDM 19 2.9.2 DS-CDMA 21 Chapter 3 A Simple Linear Method to Calculate SNR for UWB Signals 25 3.1 Basic Concepts 25 3.2 Inserting a LTI Filter 30 3.3 Including More Effects 32 Chapter 4 A Low Band Impulse-radio UWB Transceiver Design and Model 35 4.1 System Architecture 35 4.2 System Spec. 37 4.3 Transmitter Model 38 4.4 Channel Model 40 4.4.1 Path Loss 40 4.4.2 Multipath 42 4.4.3 Narrowband Interference (NBI) 43 4.5 Receiver Analog Front End (AFE) Model 43 4.6 Packet Format 46 4.7 Receiver Baseband Model 47 4.7.1 Correlator Bank and Peak Searcher Model 48 4.7.2 Golay Match Filter Model 49 4.7.3 Boundary Detection Model 49 4.7.4 Data Recovery Model 50 4.7.5 Timing Recovery Model 51 Chapter 5 Simulation Results 53 5.1 Bit Error Rate 53 5.2 Boundary Detection Error Rate 55 5.3 Frequency Offset 56 5.4 ADC Offset 57 Chapter 6 Conclusion and Future Work 60 6.1 Conclusion 60 6.2 Future Work 61 References 622626741 bytesapplication/pdfen-US脈波式無線電超寬頻近距離低功率全數位窄頻干擾多路徑頻率飄移Impulse radioUltra-widebandshort rangelow powerall-digitalnarrowband interferencemultipathfrequency offsetthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/58800/1/ntu-93-R91942029-1.pdf