【作者】 刘晓雷；

【导师】 吴芝路；

【作者基本信息】 哈尔滨工业大学 ， 信息与通信工程， 2006， 硕士

【摘要】 超宽带(Ultra Wide Band)是近年来发展起来的无线电技术。它和传统无线电系统相比在很多方面都具有明显优势。利用纳秒级的非正弦波窄脉冲来传输数据,具有传输速率高、功耗低、安全性好、抗多径能力强以及成本低廉等许多优点。特别是不需要占用额外的频谱,可与现有的无线通信系统在同一频带内共存这一特点,使它在频谱资源日益紧张的今天受到了重视。目前超宽带通信技术已成为无线通信技术研究的热点之一。超宽带无线电技术的应用领域也十分广泛,如短距离高速通信、雷达、目标定位等。本文主要研究了超宽带系统中的发射技术,以及发射机的整体结构。并设计了模拟以及数字几种不同的窄脉冲发射方法。以高速电路信号完整性分析为指导,采用最优结构完成了超宽带发射机与接收机PCB电路的设计,本文的研究内容主要包括以下几个方面:(1)分析超宽带通信系统发射机所需信号波形。(2)采用数字以及模拟的方法设计了不同的窄脉冲发射方案。(3)根据示波器实测结果给出了方案的对比以及窄脉冲信号结果。(4)通过分析信号完整性理论,解决高速信号在PCB设计中的失真问题。(5)完成UWB系统收发机的部分关键电路进行设计与实现。通过对几种不同的发射机方案的仿真与测试,最终完成了超宽带发射机的硬件电路的搭建与调试,得到了几种发射技术的对比。发射电路经过高速宽带示波器的输出测试,得到了比较理想波形和幅度以及纳秒级宽度的窄脉冲。对发射以及接收关键电路进行了研究,并在信号完整性分析的指导下完成立了PCB的设计。对超宽带系统整体的设计以及高速电路设计具有一定的支持和参考作用。更多还原

【Abstract】 Ultra-wideband (UWB) communication is a wireless communication technique, in which data are transferred using narrow pulses with very short duration. It has many advantages, for example high transmission rate, low power consumption, good security, robustness to multipath and low cost. Especially, it does not need extra frequency spectrum, and can coexist with the existing wireless communication systems at the same frequency band, which makes it draw much attention nowadays when the frequency spectrum resource has become more and more precious. UWB technology has wildly applied in many filed such as short distance high speed communication, radar, wireless location and so on.This paper focus on the transmitter structure in UWB communication system. Study and designed analog and digital impluse generator, guided by the signal integrity analysis finished the hardware PCB design of UWB transiver. Finally the transmitter and receiver board has been built and got a satisfaction result. Totally speaking, the thesis includes the following parts:(1) Research the wave shape of the UWB communication system.(2) To meeting the application cases, analog and digital method of impulse generator are discussed in the thesis.(3) Result is given from the oscilloscope and compared different scheme.(4) Signal intergrity is discussed to avoid high speed signal distortion when designing the hardware.(5) Study and research the parts of hardware design of UWB transmitter and receiver.Through simulation and test on several transmitter design scheme, compared results has been given. Impulse wave has been examed on high speed wide frequency spectrum oscillograph,we have a satisfaction result on amplitude, shape, and shot time duration. Reasearch the hardware design of transmitter and receiver, finished the PCB design guided by Signal intergrity. The research and result are of valuable worth for UWB transmitter system更多还原