宽带卫星通信系统传输特性研究  

Research on Transmission Characteristics of Broadband Satellite Communication System

作　　者：周文玉[1] 张德文[2] 江会娟[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所 [2]海军91917部队

出　　处：《计算机与网络》2009年第12期43-45,共3页Computer & Network

摘　　要：宽带化、高速率是卫星通信的发展方向之一,宽带卫星信道特性对高速率信号传输性能的影响是系统设计关心的问题。分析了信道的变化特征,并通过计算机仿真分析,给出了宽带信道幅频响应、群时延响应特性对传输性能影响的具体数据和设计方法,可以为工程应用提供参考。分析结果表明,宽带卫星转发器信道特性相对较差,传输链路的解调门限需要放宽,以满足系统业务服务质量的要求。Broadband and high-data-rate is one of the development trends of future satellite communication. The effect of broadband satellite channel on high-data-rate signal transmission characteristics is an issue of interest in system design. The properties of channel ofiset are analyzed in this paper. After computer simulation and analysis, the material and method of effect of the broadband channel on transmission characteristics are presented, which can provide references for engineering applications. The analysis results show that the channel performance of broadband satellite transparent repeater is relatively low, and the demodulation SNR should be larger in order to meet the system QoS requirements.

关 键 词：宽带卫星通信 传输特性 幅频响应 群时延响应 

分 类 号：TN927.2[电子电信—通信与信息系统]