半导体激光空间通信几个问题的探讨

文章简要介绍了光空间通信三种典型的通信系统结构，并对调制／解调技术，大功率光发射机和光学光线设计进行了讨论。     

用于计算机光互连的集成化发送器和接收器

从对计算机光互连的实用要求出发，实现了用集成化的发送器和接收器经光纤连接器组成收发对后，能很好地在４×４多处理机系统内用光互连代替电互连。着重探讨了发送器和接收器的结构、设计，以及工艺改进途径，对互连器件的配套选择、性能测试作了一定工作，使之能方便使用。     

多波长光标记交换中一种新的多波长-时间编码法

首先介绍了多波长光标记分组交换的基本原理,并针对多波长光标记分组交换中的标记头编码法,提出了一种新的多波长-时间编码法,这种编码法充分利用了波长和时间两种自由度,大大增加了编码数量,提高了编码效率.最后,设计了实现这种编码的发射机和接受装置.     

基于Modbus TCP的发射机远程监控系统的设计与实现

针对目前广播电视发射台人工现场监控发射机工作效率低,环境艰苦、维护工作量大等一系列问题,设计了基于Modbus TCP通信的发射机远程监控系统,实现发射机远程开关机、参数设置和工作状态显示,本文描述了采用客户机与服务器模型的设计过程。系统已联机应用于广播台控制系统中运行效果良好。     

RESEARCH ON TECHNOLOGY OF CONTROLLED SOURCE RADIO MAGNETOTELLURIC SYSTEM'S TRANSMITTER

The basic theory and principle of the artificial Controlled Source Radio Magneto Telluric(CSRMT) method is studied and a novel CSRMT transmitter in kH z frequency band is designed. The specific circuit and measured results of some key modules in transmitter are presented, and some outdoor experimental tests have been carried out, which shows that the completed prototype of transmitter can generate a continuous sine current with frequency up to 35.33 k Hz, peak-to-peak amplitude up to 40 A, and realize a reliable transmitting mode with multi-frequency and high-current. The transmitter has a wide operating band, large magnetic moment and high waveform fidelity, and can meet the requirements of shallow geological exploration with high-resolution.     

激光大气通信系统的关键技术研究

文中介绍了大气激光通信优点,阐述了大气激光通信系统的工作原理、关键技术,并展望了未来光通信的前景.     

S波段调频遥测发射机的研制

文章介绍了我国新一代 S 频段遥测发射机,论述了该机工作原理、技术特点及电路设计思想。实测数据表明该机主要性能已接近国际遥测标准。     

多区蜂窝CDMA系统上行链路的区内C/I平衡技术

本文采用两种区内C/I平衡技术来控制多区蜂窝CDMA系统上行链路中移动台的发射功率,用以补偿阴影和路径损失的影响;采用与传统不同的小区平均中断概率(Outage probability)来评价它们的性能。     

High-Performance Fiber-Optic Link for Electronic Countermeasure Antenna Remoting

The ability to remotely radiate microwave signals has become an essential feature of modern electronic countermeasure (ECM) systems. The use of fiber optics allows remote microwave links to be constructed that have very low propagation loss and dispersion, are very flexible and light in weight, and have a high degree of immunity from external electromagnetic fields, cross talk, and environmental effects. This combination of desirable characteristics is beneficial to avionic ECM antenna remoting as well as many other applications. GEC-Marconi has developed high-per formance fiber components for use in a towed radar decoy. The resulting rugged and compact optical transmitter and receiver modules have been proven to maintain the required performance over the full hostile range of environmental conditions en countered on a fast jet. Packaged fiber-optic links have been produced that can achieve a compression dynamic range of 87 dB in a 1-MHz bandwidth over a 2- to 18-GHz range.