| 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〖WT《Times New Roman》〗%〖WTBZ〗；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。 |
| 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 |
| DOI： |
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| 基金项目: |
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| Performance Comparison between ACM and VCM in Ka-band Remote Sensing Satellite Data Receiving System |
| HUANG Zhan |
| (Southwest China Institute of Electronic Technology，Chengdu 610036，China) |
| Abstract: |
| 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〖WT《Times New Roman》〗%〖WTBZ〗 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. |
| Key words: remote sensing satellite data receiving system Ka-band ACM VCM transmission performance |
