摘要
一般卫星通信系统信道特性是指群时延特性、幅频特性、相位噪声特性及非线性失真4种,针对上述4种信道特性对系统传输性能的影响展开研究。设计了卫星通信系统信道数字仿真模型,数字化了4种信道特性,用Mtalab软件分别仿真了卫星转发器比较典型的4种特性对传输性能造成的恶化,并且对4种传输特性进行了综合仿真。基于仿真结果提出了卫星通信系统指标分配建议,仿真结果可以为卫星通信系统的设计提供参考。
The satellite communication system has four channel characteristics such group delay, amplitude frequency, phase noise and nonlinear distortion.The influence of four channel characteristics on transmission performance of system is studied.The digital chan- nel simulation model of satellite communication system is designed,the four channel characteristics are digitalized.The deterioration of transmission performance caused by every characteristic of satellite transponder is simulated by Mtalab software, and the integrated simulation is done for the four transmission characteristics. Based on the simulation results, the proposal for specifications allocation of satellite communication system is presented.The simulation results can supply reference to the design of satellite communication system.
出处
《无线电工程》
2015年第4期9-11,19,共4页
Radio Engineering
基金
国家部委基金资助项目
关键词
群时延
幅频特性
相位噪声
非线性
group delay
amplitude frequency feature
phase noise
nonlinear distortion
