The Design Of Multi-mode Wireless Module And The Research Of Interference Suppression For The Triple Play

Communication technology continues to evolve to provide the technical foundation for a variety of applications based on communication technology, people put forward the concept of "triple play",the triple play refers to the integration of the Internet, cable television and telecommunications networks, while providing services such as data, broadcast TV and voice for the user.With the development of wireless communication technology, wireless networks have been developed from the WAN to the MAN and then to the LAN and PAN, Wireless communication network has a lot of advantages relative to a wired communication network, the short distance wireless communication became more and more prominent in the wireless communication because of its own advantage, appeared common short distance wireless communication technology such as WiFi,ZigBee,Bluetooth, etc.Linux is a multi-tasking, multi-user operating system, it is very widely applied in the field of embedded applications as a powerful, open-source operating system,, more and more embedded products are based on Linux platform.This paper based on the background of the triple play subject, multi-mode wireless communication module supporting WiFi, Bluetooth, ZigBee is designed,it is an important part of the home information gateway which belongs to the triple play,this module implements the technology integration of WiFi, Bluetooth and ZigBee, implements the family wireless coverage, including the wireless coverage of data (WiFi), voice (Bluetooth) and family Internet of things (ZigBee). The gateway is based on ARM embedded Linux platform,and the module communication with the gateway via USB.This article introduces the commonly used short-range wireless communications technology,home information system,and then designed the multi-mode wireless communication module which belongs to the family information gateway applications. Power management, USB HUB as well as Wi-Fi, Bluetooth and ZigBee three communication unit were designed in the hardware section, the software section includes the Linux drivers transplant of the communication module, and finally analyzes the mutual interference of the three same frequency short-range wireless technology, and introduces interference suppression method taken in this article.