深空激光可靠通信的关键技术研究

项目名称： 深空激光可靠通信的关键技术研究

项目编号： No.61271261

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 无线电电子学、电信技术

项目作者： 王汝言

作者单位： 重庆邮电大学

项目金额： 80万元

中文摘要： 深空光通信是提供高数据率、大容量、低功耗、高安全性深空通信的最佳方案，其可靠运行对推动深空探测的发展具有重要意义。然而，如何在距离远、信号弱、时延大、大气影响严重、功率受限等不利情况下实现深空激光可靠通信是人类共同面对的技术难题。本项目拟在前期工作基础上，对信源压缩、信道编码、调制、数据传输策略等关键技术展开深入研究，为深空光通信系统的优化设计提供理论基础，为深空光通信的实际应用提供技术支撑。具体内容如下：①建立基于压缩感知的深空图像压缩编码与重构算法，提高系统资源利用率、降低系统复杂度；②构造性能优异的LDPC码并给出有效消除陷阱集且接近最大似然译码的译码算法，降低编码复杂度，提高译码性能；③建立强抗大气效应的调频光OFDM信号传输模型，分析其在完善大气信道模型下的性能，提高信息传输速率，保障激光信号的可靠传输；④设计链路状态感知的智能数据传输策略，有效利用链路资源，降低传输控制开销。

中文关键词： 深空光通信；压缩感知；LDPC码；光正交频分复用；数据传输策略

英文摘要： Deep space optical communications, as the optimal scheme providing high data rate and capacity、low power consumption and high safety communications, its reliable operation has important meanings for improving the development of deep space exploration. However, how to realize the deep space optical reliable communications under the disadvantageous situations of long distance、weak signals、long time-delay、serious atmosphere effect、limited power, is the common difficult subject to human being. Based on the previous work, this project will intensively study source compression、channel coding、modulation technology and data transmission strategy, so as to provide theory basis for the optimized designs of deep space optical communication systems, and to provide technology support for the practical use of deep space optical communications. The specific contents are as follows:①establish compressed sensing based compressing coding and reconstruction algorithm for deep space images, so as to improve the resource utilization ratio and to lower the complexity of the system; ②construct LDPC codes with excellent performance and propose the decoding algorithm which can effectively eliminate trap sets and is close to maximum likelihood decoding algorithm, so as to reduce the complexity of coding and to improve decoding performa

英文关键词： Deep space optical communicatons；Compressed sensing；LDPC codes；Optical OFDM；Data transmission strategy