本文首先设计了用于CAN总线和RS - 485总线向以太网转换的接口转换卡，构建了无缝通信系统的硬件平台。

First, an interface convert card is designed, which can convert can field bus and RS-485 bus to Ethernet. This card will build up the hardware platform of the seamless communication system.

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研究第二代移动通信系统向第三代移动通信系统的演进，深入研究WCDMA的网络体系结构及其接口规范。

Research the evolution of the mobile telecommunication system from 2g to 3g, the network architecture and interface specifications of WCDMA.

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