摘要
SUMPLE相关算法是深空网天线组阵中信号合成最重要的方法之一。将SUMPLE权值估计信噪比的计算方法由均匀天线阵推广到非均匀阵,给出了非均匀阵合成损失系数的计算公式。理论分析与仿真结果表明,在非均匀阵SUMPLE合成中应对权值幅值进行修正,以使其满足最优合成条件。充分利用现有的大型射电望远镜,在其周围建设若干小口径天线进行组阵,可以获得比单纯由小天线组成的均匀阵更好的合成性能,且具有更强的微弱信号适应能力。
SUMPLE is one of the most important array coherence techniques in deep space network. The estimation of weights SNR and combining loss of SUMPLE algorithm is generalized to non-uniform antenna arraying in this paper. Theoretical analysis and simulation results show that the amplitude of SUMPLE weights of non-uniform antenna arraying should be corrected in order to meet the optimum conditions. Making full use of the existing large radio telescopes and arraying with a large number of small antennas nearby, the better combining performance and stronger ability to adapt to weak signal can be obtained, compared with the uniform array which all composed with small antennas.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2009年第5期1941-1946,1984,共7页
Journal of Astronautics
基金
中国科学院国家天文台青年人才基金
关键词
天线组阵
SUMPLE相关
信号合成
非均匀阵
Antenna arraying
SUMPLE algorithm
Signal combining
Non-uniform antenna arraying
