【作者】 杨杰；

【导师】 刘连浩；

【作者基本信息】 中南大学 ， 计算机应用技术， 2008， 硕士

【摘要】 无线通信是未来技术发展的主流方向,而在计算机外设方面,USB接口技术逐渐成了PC外设的标准接口。在短距离无线数据通讯领域,有着诸如Bluetooth,WiFi,2.4GHz等技术标准,2.4GHz作为和Bluetooth工作在同一频段无线短距离通讯技术,有着更低的成本,更快的开发周期,和更强的针对性。本文介绍了目前最新的2.4GHz无线通讯技术,将其和USB2.0协议相结合,有效的解决了计算机众多外设电缆所带来的麻烦,同时在一个无线适配器上实现了与多个外部设备的同时通讯,并采用了改进的DSSS(Direct Seqcuence Spread Spectrdm,直接序列展频),提高了无线通讯的抗干扰性。在同类产品中有着明显的竞争优势。首先介绍了当前存在的短距离无线通讯技术,对各种技术的优缺点和应用领域进行阐述,同时说明了当前USB2.0技术发展的现状和所面临的问题。然后对本系统中无线通讯的协议进行了详细的分析,从物理层、链路管理层和应用层三个方面进行了阐述,其中着重介绍了应用层协议,以及怎么将其应用到实际的开发当中。接着对USB2.0协议的应用也进行了详细的介绍,从怎样开发一个USB设备着手,分析了USB描述符、USB枚举、USB传输三个方面的应用。最后,也是最重要的一部分,对整个无线通讯USB系统的硬件设计、固件设计和驱动软件设计,提出了设计的流程和实现的原理。其中对无线协议在实际开发应用中的流程进行了透彻的解释。更多还原

【Abstract】 Wireless communication is becoming the mainstream of communication technology. At the same time, USB interface technology is also becoming the standard interface PC peripheral. There are so many technical standards on short-range wireless communication technology, such as Bluetooth, WiFi, and 2.4GHz. As a new technology, same frequency as Bluetooth, 2.4GHz has its own advantage, like low cost, short development period and more powerful pertinence.The result the thesis proposes introduces the latest 2.4GHz wireless technology integrated with USB2.0 interface, and provides a solution to implement one adapter that can communicate more than one device simultaneously. Depending on the use of improved DSSS (Direct Sequences Spread Spectrum) technology, 2.4GHz wireless USB technology improves anti-jamming ability deeply. Among the similar technologies, it has better performance obviously.Firstly, several short-range wireless communication technologies are described in this paper. Via comparing with them, the paper presents the key advantage and disadvantage of different technology, and the fields they are applying to. Meanwhile, USB2.0 technology is introduced as well.Secondly, this thesis illuminates the wireless protocol throughout in physical layer, link management layer and application layer. Importantly, it provides an application layer protocol and expands the implementation to production development. Based on USB2.0 protocol, this thesis presents the flowchart of USB application including USB descriptor, USB enumeration and USB transaction.Finally, this section has the main contents. It contains how to develop hardware, firmware and relevant driver, as well as the basic principle and design flow. Especially, the whole routine to implement wireless protocol is described in this section.更多还原