基于OQAM/OFDM的大容量对流层散射通信技术研究

The troposcatter communication, which has the advantages of long single-hop communication distance ,high obstacle-climbing ability and superior reliability, turns to be one of the main means of communications in future information system operations. The promotion of the capacity of troposcatter communication in complex electromagnetic environment, in order to satisfy the high-speed and reliable transmission of command/control information and guidance data in air defense and anti-missile operations, is an urgent problem. In this project, OQAM/OFDM technology with high spectrum utilization and strong anti-interference ability is applied to troposcatter communication.. Based on troposcatter channel model and its effect on the symbol of OQAM/OFDM, the system of troposcatter communication based on OQAM/OFDM would be established. Furthermore, The key technologies of symbol pulse shaping, time and frequency synchronization and channel estimation are investigated. Our contributions will supply theoretical and technical supports for realizing the large capacity troposcatter communication. The prospective achievements will improve the transmission capacity and anti-jamming ability oftroposcatter communication system significantly. This project has important theory significance and practical values in promotion of air defense and anti-missile operations efficiency.

对流层散射通信具有单跳通信距离远、越障能力强、可靠性高等优点，是未来信息化体系作战的主要通信手段。为了满足防空反导武器系统中指控信息和制导数据的高速可靠传输，在复杂电磁环境条件下提升对流层散射通信传输容量是军事通信中亟待解决的难题。本项目将具有高频谱利用效率和强抗干扰能力的OQAM/OFDM技术应用于对流层散射通信中，针对对流层散射信道对OQAM/OFDM符号的影响，开展大容量对流层散射通信理论与技术研究，建立基于OQAM/OFDM的对流层散射通信系统模型，破解大容量对流层散射通信符号脉冲成形、时频同步和信道估计等关键问题，实现基于对流层散射信道的大容量信息传输。本项目的开展及预期研究成果将进一步提高对流层散射通信系统的传输容量和抗干扰能力，对提升防空反导体系作战效能具有十分重要的理论意义和实用价值。

为了提升未来信息化体系作战中复杂电磁环境条件下对流层散射通信传输容量，该项目开展了大容量对流层散射通信理论与技术研究，构建了基于OQAM/OFDM的对流层散射通信系统模型，提出了认知对流层散射通信方法，建立了复杂气象条件下的对流层散射信道数学模型，发明了基于压缩感知的OQAM/OFDM系统信道估计算法，提出了大容量对流层散射通信符号脉冲成形、时频同步和信道估计等系列相关方法，开展了实验室和野外对流层散射信道传输试验，发表学术论文34篇，出版专著2部，产生发明专利6项，培养博士研究生5名、硕士研究生7名，支撑获得军队科技进步一等奖1项，对大容量对流层散射通信系统的方案设计和工程实现具有较高的理论指导与实用价值。