The thesis deals with the algorithm of demodulation and its asic ( application specific integrated circuit ) implementation . the demodulation is used in the dvb receiver of digital video broadcasting satellite transmission system 本文所研究的正是卫星电视广播系统dvb标准接收机中数字解调的算法及其在专用集成电路芯片( asic )上的实现。
For the application of direct broadcast satellite ( dbs ) , a ku - band high image rejection broadband mixer is designed using ads . it appears predominant performances when compared with common single balanced mixer 针对卫星电视直播接收系统，用ads设计了一个宽频带、高镜像抑制度、低噪声的ku波段镜像抑制混频器，并同普通平衡混频器进行了对比分析，显示了其优越的性能。
The chief executive in council has awarded a licence to asia satellite telecommunications company limited asiasat under the telecommunications ordinance to launch and operate a satellite asiasat 4 carrying the four broadcasting satellite service channels assigned to hong kong 行政长官会同行政会议根据电讯条例向亚洲星有限公司亚洲星发出牌照，以便发射和操作一枚星亚洲星4号，提供四条广播星服务频道的容量。
Positive support will be given to the development of commercial broadcasting and telecommunications satellites such as geo - stationary telecom satellites and tv live broadcasting satellites with long operating life , high reliability and large capacity , so as to form china ' s satellite telecom industry 积极支持商用广播通信卫星的发展，开发长寿命、高可靠的大容量地球静止轨道通信卫星和电视直播卫星，初步建成中国卫星通信产业。
Indispensable for high quality optical carrier signal reception in a large dynamic range , agc analog optical receivers are widely used in the optical transmission of radio and microwave signals , such as fiber catv , direct broadcast satellite tv , wireless communication and radar 摘要自动增益控制模拟光接收机广泛应用于光纤有线电视、光纤直播卫星电视、无线通讯及雷达等射频微波信号光传输，是实现大动态范围光载波信号高质量接收必不可少的一项技术。
With the development of digital tv , the change of broadcast tv from analog to digital has been the general course of development . usa , japan and europe have established their respective digital tv standard . dvb ( digital video broadcasting ) standard of europe talent showing itself gradually , dvb - t ( digital video broadcasting terrestrial ) , dvb - c ( digital video broadcasting cable ) and dvb - s ( digital video broadcasting satellite ) has been applied widely in all country 随着数字电视的发展,广播电视由模拟向数字的转变已经是大势所趋,美国、日本和欧洲先后制定了各自的数字电视标准,而欧洲的dvb (数字视频广播)系统逐渐脱颖而出,其中的dvb - t (数字地面广播电视) 、 dvb - c (数字有线广播电视)和dvb - s (数字卫星广播电视)已在各国有广泛的应用。
In 2005 , “ chinasat 9 ” direct broadcast satellite and “ chinasat 6b ” telecommunication satellite projects were approved by the state council . “ chinasat 6b ” and “ chinasat 9 ” direct broadcast satellite will enhance the technology equipments abilities in chinese telecommunication tv - broadcast market for chinasat , satisfy the latest requirements to the satellite telecommunications and broadcast programmes transmission services by the latest satellite technologies 该系统将卫星通信与基于ip的宽带业务相结合，能够与地面宽带网络互为备份和补充，可向国内用户提供包括互联网宽带接入、话音、数据、视频和多媒体在内的综合信息服务。
