传统方法只能分析系统中的单一低速总线，分别观测物理层信号和数据层数据进行分析。
Traditional analysis tools only cover the single low speed bus and test signals in physical layer and data layer respectively.
称为 物理层协议的两个底层处理网络电缆上的实际信号传输。
The two bottom layers, called the physical layer protocols, take care of the actual signal transfer over the network cable.
本文的工作集中在TD-SCDMA空中接口物理层基带信号处理的核心技术：信道的编码和复用。
Work of this paper focus on the core technology , namely Channel Coding and Multiplexing of baseband signal process of radio interface physical layer in TD-SCDMA.
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