项目名称: 微弱信号分布式接收机理及关键技术研究
项目编号: No.61271265
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: 詹亚锋
作者单位: 清华大学
项目金额: 76万元
中文摘要: 通过地面天线组阵增大天线的等效口径,是提高深空通信中微弱信号接收可靠性的重要途径。传统的深空通信天线阵由同一地域的若干天线组成。如果利用不同地域地面站的既有天线资源,构成分布式天线阵,就可以极大降低深空站的建设成本。其面临的核心难点是如何在各个天线时频基准不同源且信噪比极低的情况下,实现微弱信号的分布式相干接收。 本项目以我国未来深空站的建设为背景,重点研究微弱信号分布式天线接收的机理及关键技术,包括微弱信号接收性能界分析、信号的纹理特征分析与高精度提取方法、分布式天线间接收信号的特征参数估计与相干合成理论、微弱信号的分布式抗干扰接收技术等。 本项目的研究成果不仅可以应用于我国未来的深空探测,还可以推广应用到非合作目标信号的接收等领域。
中文关键词: 深空通信;微弱信号;分布式接收;迭代处理;天线阵
英文摘要: Antenna arraying is an important method to receive weak signal of deep space communications. Traditional antenna array is constitutive of antennas in the adjacent area. If existing antennas in different areas can be used to construct a distributed antenna array, the cost will be reduced significantly. However, the time and frequency benchmark of different antennas are different. How to receive correlatively the weak signal in such case is a key problem. This project researches the mechanism and key technologies of distributed reception for weak signals, including reception bound analysis, signal feature analysis and estimation, theory of correlative combining and distributed anti-interference. The research results can be adopted in deep space exploration, and can be extended in signal reception for non-cooperative communications.
英文关键词: deep space communications;weak signals;distributed reception;iterative processing;antenna array