| 一种用于深空通信的系统LT码 |
| |
| 引用本文： | 王丽娜,魏鹏,胡广大,唐伟.一种用于深空通信的系统LT码[J].宇航学报,2015,36(8):954-960. |
| |
| 作者姓名： | 王丽娜 魏鹏 胡广大 唐伟 |
| |
| 作者单位： | 1. 北京科技大学计算机与通信工程学院，北京100083；
2. 北京科技大学自动化学院，北京100083 |
| |
| 基金项目： | 中央高校基本科研业务费专项资金资助项目（FRF-TP-14-050A2） |
| |
| 摘 要： | 针对传统LT（Luby Transform）码用于深空通信时性能不理想的问题，通过重构LT码的二分图设计适用于深空通信环境的系统LT码，提出一种去环编码算法。采用外信息转移图分析系统LT码的收敛阈值，然后通过仿真试验评估系统LT码的性能。仿真结果表明，采用本文提出的编码方案的系统LT码能够明显降低错误平层，提高译码算法的性能。
|
| 关 键 词： | 深空通信 系统LT码 加性高斯白噪声 编码算法 |
| 收稿时间： | 2015-02-03 |
Systematic LT Code for Deep Space Communication |
| |
| WANG Li na,WEI Peng,HU Guang da,TANG Wei.Systematic LT Code for Deep Space Communication[J].Journal of Astronautics,2015,36(8):954-960. |
| |
| Authors: | WANG Li na WEI Peng HU Guang da TANG Wei |
| |
| Institution: | 1. School of Computer and Communication Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. School of Automation and Electrical Engineering, University of Science and Technology Beijing, Beijing 100083, China |
| |
| Abstract: | The performance can be degraded when traditional LT (Luby Transform) codes are used for deep space communications. In this paper the systematic LT codes are designed by reconstructing the bipartite graph and can be suitable for deep space communication environment. An encoding algorithm to eliminate cycles is proposed. The convergence threshold of the systematic LT codes is analyzed by using extrinsic information transfer chart. And then the performance of systematic LT codes is evaluated through a serial of simulation experiments. Simulations results show that the systematic LT codes adopting the proposed encoding algorithm can significantly degrade the error floor and improve the decoding algorithm performance. |
| |
| Keywords: | Deep space communications Systematic LT codes Additive white Gaussian noise Encoding algorithm |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《宇航学报》浏览原始摘要信息 |
| 点击此处可从《宇航学报》下载免费的PDF全文 |
