Considering severe electromagnetic interference of electrified railway and the development of inter-station communication channel technology,this paper systematically analyzed how to using code theory to work out practical coding method to improve the reliability of information transmission. Through combining coding method with time sequence logical control and Hash algorithm,the security and reliability of inter-station communication is improved greatly.
the communication between Level2 and Level1,automation control system,is based on OPC(OLE for Process Control) protocol. Finally,a typical architecture of Baosteel's Cold Mill Process control system L2 is given.
2. Investigate the applicability of OFDM and DSSS as the modulation techniques of distribution line carrier communication and study the related implementation techniques including synchronization, channel compensation, encoding interweave and mapping, and dynamic allocate sub-channels.
This paper describes the function layer construction, network survivability and security performance requirements of optical tr ansport network, defines the management function of optical transport net work, especially analyzes the optical supervision channel technologies of OADM/O XC.
Sharing of geosciences information is an important content of studying the geosciences and is a trend of developing Geoscience. It must rely on many key techniques such as the regularity standard of technique, mass database, metadata and information transport in order to share effectively the information which came from different fields of geosciences. Furthermore, knowledge discovery can reproduce new knowledge based on sharing geosciences, and enhance the sharing capability at the same time.
In this paper, the framework of hardware and software of a MPEG- 2 transport stream multiplexer has been introduced, and some important function blocks of software has been described in detail. The multiplexer has been used in developing channel technique for HDTV. Finally, the experimental effect has been given.