文档介绍：毕业论文
无线光通信中调制解调
系统的研究

学生姓名: 学号:

学院:
专业:

指导教师:
2010年6月
无线光通信中调制解调系统的研究
摘要
无线光通信是指利用激光束作为载波在空间直接进行语音、数据、图像信息双向传送的一种技术。
无线光通信是一种新兴的无线通信方式,它将传输的信息调制在光脉冲上,在THz光谱范围内传输信息,具有很高的数据传输速率。
本论文通过研究进行以下几个方面:
。
2. 在对五种典型无线光通信调制方式——OOK、PPM、DPPM、DPIM 和DH-PIM 的调制结构进行分析的基础上,结合大气无线光信道特点,分析比较了这五种调制方式的平均发射功率、带宽需求和误时隙率。
3. 以PPM为例分析了无线光通信的调制解调系统结构及工作原理。
4. 简单分析了数字信号处理器(DSP)方案及现场可编程门阵列器件(FPGA)。
本文重点阐述了五种典型的无线光通信的调制方式,分析其特点,并比较了这五种调制方式,理论分析与仿真结果表明:DPPM、DPIM 和DH-PIM 更具有优势,更适合于未来无线光通信系统。
关键词: 无线光通信,调制,发射功率,带宽, 误时隙率

Research of Modulation for
Optical munication
ABSTRACT
FSO is a kind of technique that use laser as carrier wave to diplex transmit speech,data and picture information directly. optical munication is one of the most burgeoning methods for munieation,which sends signals using optic pulse. And its transmission rate is very high.
This thesis carried through the following aspects of study:
1. Analyzed the channel and noise model that suitable for FSO,
2. bination of the characteristic of the atmospheric optical wireless channel, the modulation structures, transmission capacity, power requirement and slot error rate of the typical modulation schemes as OOK, PPM, DPPM, DPIM and DH-PIM for atmospheric optical munications are analyzed.
3. Taking PPM for example to analyze the optical wireless channel’s modulation and demodulation system structure and working principle.
4. make a brief analysis for Digital signal processor(DSP)and Field Programmable Gate Array(FPGA)
In this paper, we expatiated on the modulation structures, transmission capacity, power requirement and slot error rate of the typical modulation schemes as OOK, PPM, DPPM, DPIM and DH-PIM for atmospheric optical munications are analyzed. Theoretical analysis results show that DPPM, DPIM and DH-PIM are more applicable for the future optical munication.
Key words : optical munication, modulation, emissive power, bandwidth, slot error rate
目录
1 绪论 1
无线光通信