信息技术的快速发展,使得美陆军战术网络已经进入快速发展阶段,通过分析研究关陆军战术网络发展现状、网络集成、核心能力、网络规划与战术级频谱管控的实施方式,为未来我陆军战场信息网络建设提供参考路径;同时,对我军频谱管控有效落地具有重要的借鉴意义.

The populations of cars bring the convenience and happiness of living, but people are becoming more and more worried about the frequent loss of the cars. In this paper, a automobile security system is designed by adopting AT89C2051 and A7102C wireless transceiver. This system can use specific signal detecting means and support different alarming measure, which helps patrolmen and security guards quickly and correctly find the first crime evidence.

This article mainly from the start of the radio signal propagation characteristics, and connecting with the reality, according to the actual situation of some aera, the three typical environment of the topography for signal channel test and modeling is choosen. Through to the research of the zone VHF/UHF band, and a positive approach of the channel test and modeling are got.

Using RFID technology can significantly improve social efficiency, but the security of RFID systems is the biggest obstacle to its application. By analyzing flaws of fixed key mechanism in RFID systems, a simple algorithm of RFID dynamic key management is proposed. An experimental SCM system is designed to verify the algorithm. Experimental results show that the algorithm is safe, effective. The experimental RFID systems with proposed algorithm have the potential value of social promotion.

To meet the need of high rate and high reliability for next generation of wireless mobile communication system, in this paper, we designed a new communications system of OFDM-IDMA based on QC-LDPC. The performance under different coding rate, different length of frame is analyzed, and we also compared the performance with the system based on convolutional codes, the simulation results show that this new system can provide greater coding gain and better communications service, it is very suitable for high-speed data transmission and also has very far-reaching significance for the future of digital communication systems.

Now the investment promotion administration is carried out by the External Affairs Office of every city’s government without effective information integration. The building of City Investment Promotion Information Network System will be helpful for meeting the foreign investor’s information demands in a fast, easy and accurate way from all directions and levels. What’s more, it also helps to improve investment environment, consummate investment service system and manage the city’s foreign investment information resources with high efficiency. This paper offers some useful suggestions on building the city investment promotion information network by expounding how to construct it from multiple aspects, such as system structure, investment promotion portal website, extranet, intranet, content of network information service, Multipurpose Investment Promotion Service System and implementation plan, etc.