After implementing digital signaling system into analogue trunking system , we get these improvements : more reliable connection between users , higher speed of connection , and more functions in trunking system . mdc1200 signaling system is one kind of this signaling , which is developed by motorola for improving the performance of its analogue trunking system 模拟集群通信是指它采用模拟语音进行通信,整个系统内没有数字技术,但后来为了使通信连接更为可靠,模拟集群通信系统也采用了数字信令,使集群通信系统的用户连接比较可靠,连通的速度有所提高,而且系统功能也相应增多。
First , it introduces the corresponding knowledge , technical roadmap of trunking system , and digital trunking system signaling . second , it presents the encoding , decoding , modulation , demodulation parts and several signaling functions of mdc1200 signaling system . in addition , it analyzes some signaling data packet formats 本文首先对集群通信的相关知识、发展趋势以及集群通信数字信令进行了介绍,接着对mdc1200信令的编码、解码过程,调制、解调方式以及各种信令功能的信令数据格式进行了详细地分析。
数字: figure; digit; numeral; char ...信: letter; mail令: order; command; decree数字信令音: dst digital signaling tone话音数字信令: speech digit signalling语音数字信令: speech digit signaling数字信令处理器: d digital signal proce or; dsdigital signal processor数字信令数据链路: digital signaling data link非数字信息: nonnumeric information; nonnumerical information数字信道: digital channel数字信封: digital envelope数字信号: digit signal; digital signals; ds digital signal; numeral signal; numerary signal; numerical signal数字信号谱: digital signal spectrum数字信号图: digital signaling diagram数字信宿: digital sink数字信息: digital information; digital tidings; numerical information数字信源: digital source等时数字信号: isochronous digital signal调角数字信号: angle-modulated digital signal返回数字信道: return digital channel基带数字信号: baseband digital signal进制数字信号: n-ary digital system rs目标数字信息: digital target information冗余数字信号: redundant digital signal数字信道连接: digital channel link (dcl)