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在移动通信系统中应用数字编码信令是当前发展的一种新趋向。本文首先分析移动系统的数字传输误码率,然后阐述应用纠错编码和重复传输两种方案的可靠性计算方法,导出方案设计的计算公式。举例计算了应用纠一位错的编码方案和六中取三的重复传输方案所达到的系统性能。文中并论述了数字编码传输的关键技术,即调制解调和同步等方案设计问题。
The application of digital coded signaling in mobile communication systems is a new trend of current development. This paper first analyzes the bit error rate of digital transmission in mobile systems, then elaborates the reliability calculation methods of two schemes of error correction coding and repetitive transmission, and derives the formula of scheme design. An example is given to calculate the system performance achieved by applying a coding scheme that corrects for a bit error and a six-out-of-three repetitive transmission scheme. In this paper, the key technologies of digital coding transmission are discussed, such as the design of modulation and demodulation and synchronization.