摘要
移动卫星通信系统为功率受限系统,相对地面移动通信而言,其链路余量较小,而且由于多径及遮蔽效应,当系统工作在小仰角时,其信号衰落可达到30dB,这对系统的设计提出了严峻的挑战。本文研究了信道编码和交织技术在移动卫星通信系统中的应用。通过仿真,得到了应用该技术对不同仰角特别是小仰角条件下系统性能的改善程度。同时,在研究信道相关的基础上,给出了交织相关参数的设计准则。
In comparison with terrestrial mobile communication systems, the link margin of the mobile satellite system is small due to the power limitation. Plus multipath and shadowing effects, the signal attenuation can reach as much as 30 dB when the mobile terminal is working at low elevation angle. In this paper,the application of channel coding and interleaving is studied. The result of performance improvement especially with low elevation angle is presented. In addition, the interleaving parameters are provided based on correlation function of the mobile satellite channel.
出处
《电讯技术》
2005年第4期19-23,共5页
Telecommunication Engineering
基金
国家自然科学基金资助项目"用中轨星座构建我国的跟踪与数据中继卫星系统"(60372013)
关键词
移动卫星通信
小仰角
信道编码技术
交织技术
仿真
Mobile satellite communication
Low elevation angle
Channel coding
Interleaving
Simulation
