基于USB接口的室内可见光无线通信系统的研究与实现-电路与系统专业论文.docx

摘要 无线接入方式解除了有线电缆的制约，为我们的生活提供了更加便捷、快速的接 入方式，然而现有的无线接入速率越来越难以满足人们的要求。 本论文是对高速的计算机无线光通信的应用研究，设计和验证一种新型的高速室 内可见光无线通信系统。 计算机USB接口具有速度快、可同时挂接多个外设、即插即用、支持热拔插等诸 多优点；无线光通信具有宽带、大容量、高速率、频谱资源丰富且不受管制、保密性 好、抗多径干扰性能好、电路简单等优点。 本论文基于USB接口和无线光通信的优点，对室内无线光信道特性进行了分析， 进而提出了基于USB接口的可见光无线通信系统的设计方案，该方案从功能上将系统 分为USB桥接器、光发射机和光接收机三个组成部分，对每个功能模块从如何满足方 案要求方面进行了详细的研究和分析；在理论分析的基础上，针对USB桥接电路、光 发射驱动电路和光接收电路三大功能电路进行了设计，完成了整个系统的电路设计， 并选取元器件制作了具体的硬件电路。 实验结果表明：硬件电路尺寸小巧，使用便捷。通过测试，系统基本达到了设计 要求，实现了计算机之间通过USB接口进行可见光无线通信。 关键词：无线光通信，可见光，USB接口，方案设计，电路设计 Abstract The Wireless Access mode relieves the limit of cable，and it offers much more convenient and rapid access mode for us. However，the Wireless Access speed in being is more and more difficult to meet our requirement. This paper reasearches the application of high speed computer wireless optical communication，then designs and validates an new type of high speed indoor visible-light wireless communication system. USB interface of computer has a lot of advantages such as high speed，plug and play， hot plug and so on. In Wireless Optical Communication，there are many advantages such as broad band，large capacity，high speed，abundant unregulated resources for spectrum， good performance of security and simple structure of circuit. This paper analyses the indoor wireless optical channel based on the advantages of USB interface and wireless optical communication. Then，gives a design proposal of the Visible Light wireless communication system based on USB interface，In this proposal，the wireless optical communication system is made up of USB bridge，optical transmitter and optical receiver. Further more，researchs and analyses the feasibility of the three modules technically；finally，the circuit design and implementation of the system are completed based on theory analysis. The experiment shows that the size of this system is very small，the use of this system is very convenient. Viaing test by us，this system achieves the expectant objective of this work ， and visible l