Design And Implementation Of 2.4GHz Wireless USB System

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.