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卫星系统

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X-Digital system company-- the Blackfin processor that ADI firm used in the compositive satellite receiver that a broadcast transmits systematic manufacturer to contain FM modulator in its. X-Digital system company uses Blackfin processor, offerred a kind of such products, promise satellitic operation business to convey digital frequency to still do not have the market that open far-- much resident is unit , for example hotel and apartment building. The satellitic receiver of X-Digital company changes digital satellite signal into the FM imitate signal that can be identified by receiver of consumptive assonance frequency.

X-Digital 系统公司--一家广播传输系统制造商在其带有FM调制器的集成卫星领受器中采用了ADI公司的Blackfin措置器。X-Digital系统公司采用Blackfin措置器,供给了如许一种产物,答应卫星运营商将数字音频传送到远远还没有翻开的市场--多住户单元,例如酒店和公寓大楼。X-Digital公司的卫星领受器将数字卫星信号转换成可被尺度的生产类音频领受器识此外FM模拟信号。

with the development of satellite navigation communication,antenna is a very important unit,performance of the satellite navigation communication system is affected by it partly.a new type of bifilar helix for satellite navigation communication system is introduced,and the traving-wave bifilar helix is analyzed briefly.meanwhile,the design and the test results are given.the results show that the antenna possesses excellent circular hemispherical beam with wide angle circular polarization and better impedance match,and has a compact structure and high integration.it can be applied in caps systems successful.

小 摘要:随着卫星导航通信技术的迅速发展,天线作为卫星导航通信系统中的重要部分,在一定程度上决定着卫星导航通信系统的性能。介绍一种用于卫星导航通信系统的双臂螺旋天线,讲述爬行波式螺旋天线的设计过程,并给出最终测试结果。结果表明,该天线具有优良的圆对称半球波束,良好的广角圆极化特性和优良的阻抗匹配特性,其结构简单、紧凑,为通信入站回传提供了一种优良的选择。

Product features: 1, automatic satellite system power automatically begin searching and tracking satellites; 2, Express to capture the use of WRS algorithm for finding stars at Express looking for about 15 seconds to track satellites; 3, receive real-time tracking of satellite signals, high-speed DVB identification code in order to achieve continuous flow of radio and television programs to watch; 4, automatic identification in the frequency and be able to accurately identify the location on the target satellite; 5, scanning electron velocity EBF sweep mode to ensure that the system 100 times per second tracking sweep speed, so that the antenna system to ensure that the system at all under any uninterrupted for watching satellite television programs and allowing the system to greatly increase the service life; 6, self-diagnosis can be their own fault diagnostic equipment, including communication links, sensors, drives, etc..

产品功能:1,自动寻星系统通电后自动开始搜索跟踪卫星;2,快速捕捉利用WRS寻星算法在15 秒左右快速寻找到跟踪卫星;3,接收信号实时跟踪卫星,高速识别DVB 码流以实现连续收看广播电视节目;4,自动识别能够在频率和位置上准确的辨别目标卫星;5,电子波速扫描 EBF扫模式保证了系统每秒100次的跟踪扫速度,使天线系统保证系统在任何条下都能不间断的收看卫星电视节目且使系统的使用寿命大大增加;6,自我诊断可以自行诊断设备故障,包括通信链路、传感器、驱动装置等。

Judging from the stellite system, the major risk is whether the orbit changes can be completed precisely and promptly.

卫星系统的角度看,主要风险在于变轨能否精确和迅速地完成。

In order to improve the inspection technologies of satellite interference, 5 kinds of technologies of satellite interference and integrated judgement-spectrum analysis, helix inspection, PID, S/N and signal vector were put forward. The automatic inspection system of interference of satellite TV has been built according to these inspected technologies and technology of network. The system adopts comparison of spectrum template, calibration of beaconing, mode identification, telemetering pick-up technology and improve the inspection technology of satellite interference. The alarm limits haw been defined through a lot of emulational tests, so that the system become feasible. The system has a good effect and makes up the blank of inspection technologies of interference in our country to some extent.

为了提高卫星干扰监测水平,提出了频谱监测、螺流监测、PID监测、S/N监测和信号矢量图监测等五种监测技术和干扰综合判断方法:根据这些技术手段和方法,并利用计算机网络技术,建立了卫星电视干扰信号自动监测系统;该系统利用网络化设计,采用频谱模板比对,卫星信标电平校准、信号模式识别、卫星遥测信号提取等技术,提高了卫星干扰监测的准确度和自动化程度;通过大最的仿真测试,设定告警门限,使系统的漏警率和误警率达到实用要求;该系统应用于干扰监测工作中,起到了很好的效果;在一定程度上弥补了国内通信干扰监测的空白。

With a satellite system, we are able to watch television shows that are relayed by remote channels across the world.

卫星系统,我们都可以观赏的电视节目是由遥控传达的渠道,在世界各地。

Consoles and television sets to blade server , military onboard systems and supers computer .

其实,这是超级电脑晶片的计算和应用非常广泛圈:从游戏控制台和电视机以刀片服务器,军用卫星系统和高超的电脑。

The structure of the thesis is as following. In chapter 1, the background and significance of the POAS and QVS of MSDPS are introduced. Then the function requirements of them are analyzed in chapter 2. Chapter 3 shows a deep insight and argument into various related dominant techniques such as cluster load balancing technology, message-oriented middleware, text-based burning and printing device, Eclipse RCP, Java image process, remote sending data format-oriented middleware,Hibernate technology and etc.

本文从&多元卫星海量数据处理与存储系统&的背景意义与内容入手,分析了遥感卫星数据产品输出系统和产品常规质量检验系统的功能需求,并对遥感卫星数据产品输出系统和产品常规质量检验系统的建设过程中所涉及到的异构环境下的消息中间件、群集负载均衡技术、基于文本的自动刻录打印技术、Eclipse RCP架构、遥感图像信息中间件、Java图像处理、Hibernate持久化数据库等关键性技术进行了深入的分析研究和论证,提出了有针对性的建设方案。

With the satellite transmission of information with the application of the increasingly widespread and establish portable satellite receiver system demand is increasing, At present, the existing satellite receiver system is based on the majority of satellite receiving stations, the system model. currently available portable antenna is also the geosynchronous satellite receiving stations typical of VSAT satellite communication systems.

随着卫星信息应用与传输的日益广泛,建立便携式卫星接收系统的需求也日益增加,而目前现有的卫星接收系统大多数是基于卫星接收站模式的接收系统,目前现有的便携式天线也是对于地球同步卫星的接收站,其典型的是VSAT卫星通信系统。

Global navigation satellite system is the trend of development and application of CNS/ ATMtechnology in civil aviation.

全球导航卫星系统是当今民航导航技术发展的应用趋势。

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这一模式非常关注商人的网络信用基础。

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