Ka频段遥感卫星数据接收系统ACM与VCM性能比较  

Performance Comparison between ACM and VCM in Ka-band Remote Sensing Satellite Data Receiving System

作　　者：黄展[1] HUANG Zhan(Southwest China Institute of Electronic Technology,Chengdu 610036,China)

机构地区：[1]中国西南电子技术研究所,成都610036

出　　处：《电讯技术》2020年第10期1169-1174,共6页Telecommunication Engineering

摘　　要：对Ka频段遥感卫星数据接收系统的自适应编码调制(Adaptive Coding and Modulation,ACM)与可变编码调制(Variable Coding and Modulation,VCM)的传输性能进行了分析比较。根据ITU标准,建立低轨遥感卫星轨道与多个地面接收站之间的链路衰落时间序列。在多轨长时间统计维度的基础上,仿真对比了ACM与VCM的数据传输吞吐量和可用度性能,并对ACM测站环与中心环两种反馈延时环路的性能进行了比较。结果表明,以最大化传输吞吐量为原则,合理设定VCM的链路余量并结合自动重传请求(Automatic Repeat Request,ARQ)技术,可确保VCM比ACM系统传输效率性能下降不大于3%;以最大化链路可用度为原则,ACM体制传输效率优于VCM体制;ACM中心环和测站环两种信道状态反馈的方式对系统性能影响差别较小。The performance of adaptive coding and modulation(ACM)and variable coding and modulation(VCM)is analyzed and compared for evaluating Ka-band remote sensing satellite data receiving system transmission.According to ITU standards,channel attenuation synthesis time-series on earth-space paths between satellite and different ground stations are created.Based on sufficient track long-term statistics,the transmission throughput and link availability are simulated,as well as the performance comparison of two feedback delay loops(ground-station-loop and network-control-center-loop).The simulation shows that by principle of transmission throughput maximization,VCM transmission throughput is no more than 3%inferior to ACM with appropriate link threshold margin configuration and automatic repeat request(ARQ);by principle of link availability maximization,VCM transmission throughput is apparently inferior to ACM;the performance of ground-station-loop feedback and network-control-center-loop feedback is close.

关 键 词：遥感卫星 数据接收系统 KA频段 自适应编码调制 可变编码调制 传输性能 

分 类 号：TN929[电子电信—通信与信息系统]