流星余迹通信中的智能天线技术研究

针对流星余迹通信原理及信道特点,建立了适用于流星余迹通信系统的智能天线系统模型。在热区跟踪上,使用波束切换技术;而对于可用流星余迹使用自适应数字波束形成技术。针对流星余迹持续时间短的特点,为了获得最佳接收性能,缩短等待时间,对自适应算法提出了收敛速度快、计算复杂度小的要求,这里采用变步长LMS算法与判决导向算法相结合的半盲自适应算法,并对半算法进行了仿真分析。

Research on Smart Antennas Technology for Meteor Burst Communications

According to the theory of MBC and its channel characters,we have built the Smart Antenna System Model for MBC.Beam Switching Technology is adopted in hot spot tracking,while Adaptive Digital Beam Forming (DBF) Technology is adopted for available meteor trail.Because of short duration of meteor trail,fast convergence and simple adaptive algorithm is required aiming for optimizing reception performance and shortening waiting time.So we used semi-blind algorithm combining LMS and DD algorithms,and we carry on a simulation for the semi-blind algorithm.