通信系统

In the part Ⅱ, utilizing the radio digital communication system TRS—I, We create both a CAD/CAM system and an adaptive control system.

在第二篇中，我们设计出利用无线数字通信系统TRS—I的CAD／CAM系统和自适应控制系统。

The CAD/CAM system includes (1) a main computer,(2) DSC numerical control unit,(3) TRS—I radio digital communication system,(4) Other external devices.

这个CAD／CAM系统包括：(1)主计算机，(2)DSC数控系统，(3)TRS—I无线数字通信系统，(4)其它一些外部设备。

This paper mainly introduces the baseband transmission and the waveband transmission of digital communication system.

介绍了数字通信系统中信号的基带传输和频带传输；分别论述了基带传输系统和频带传输系统模型，说明了基带信号无码间干扰传输条件及频带数字调制的工作原理。

Once both the active half and passive half of the EFBM are berthed, channels for the electrical power system, data communications system, and thermal control system will be connected, and then power and data transfer will be initiated.

一旦可调机构和被动机构激活进入对接状态，电力系统，数据通信系统和温度控制系统将被连接起来，能量和数据将开始传送。

On the other hand, OFDM is very sensitive to carrier frequency offset and frequency spread for the increasing symbol period or the small subcarrier internal, which result in serious intercarrier interference , and the performance of OFDM system is greatly affected.

另一方面，OFDM符号周期相对增加即子载波间隔的减小会使得OFDM系统较单载波通信系统对载波频率偏移或Doppler扩展更加敏感，使子载波之间的干扰增加，影响系统的性能。

The remote measure and control system based on Internet, adopting embedded system platform, accessing the Internet by lineate or radio method, will not only save the cost of invest and maintenance, so as to ensure the flexibility, real-time characteristic and reliability of data and control information, but also enhance the expansibility, transplantability of the system.

此基于互联网的远程测控通信系统，应用嵌入式系统平台采用有线与无线方式可选的接入互联网方案，不仅节省了远程监控网络的投资费用、维护成本，保证了数据和控制信息传输的灵活性、实时性、可靠性，还增加了系统的功能可扩展性、可移植性。

Comparing with the conventional modes of hydrological information transmission, the paper analyses the reality of mobile system and the protocol of Short Message Service in the GSM network. Secondly, the paper briefly introduces the realization of hydrology telemetric system. In addition, the paper shows the imperfection of Short Message Service with the other ways, for example, Data Service in the mobile network.

本文首先讲述了水情遥测系统的各组成部分，随后对比传统的水情信息的传输方式，结合移动通信系统的发展现状，分析了GSM短消息业务的各种协议，提出利用GSM移动网络中的短消息进行水情数据的传输，并简要讨论了基于GSM移动网络短消息的水情遥测系统的规划与设计，最后分析了短消息业务的局限性，并提出利用移动网络中的数据业务等其他方式对其进一步的补充。

Meanwhile, the trunking system of HYT has served more than 20 province and municipality in China.

好易通公司也是国内最大的警用集群系统供应商，公司研发和生产的模拟集群通信系统已服务全国20多个省市和自治区，并能提供客户化的数字集群系统解决方案。

Based on this new system, an electromagnetic model is established, which proves that the communication channel between antenna and rail cable is invariable.

针对传统感应无线通信系统和测速定位系统存在的不足，设计了一种新型交叉感应回线系统。

The main contents of the dissertation are as following:(1) The way to constitute a multicarrier signal by using any one complementary code from multiphase complementary code pair is proposed, and the upper bound on crest factor for a multicarrier signal is studied.

多载波及其多载波CDMA系统是未来移动通信系统一种很有应用前景的侯选方案，本文针对这两种系统中的峰平功率比减小等关键技术进行了研究，主要内容。。。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。