【摘要】 为了综合设计通信与测向跟踪系统,提出一种可以发射载有二维方向信息的空间调制通信跟踪方案。其思想是通过调制介质盘来改变信号的相位,用两个相干激励源把相位差调制到发射信号参数中,只需解调信号单天线接收机就可实现数字通信和来波方向估计。文中给出了调制信号星座的选择方法,信号状态的差分编码结构,单天线接收测向和数字信息解调算法,仿真了通信误比特率和相位测量精度,证明了在发射信号层面上是可以实现通信与跟踪综合的。更多还原

【Abstract】 Communication and tracking play important roles of remote measurement and control in spacecraft.In order to design the integrated system of communication and tracking through direction finding,we propose a new microwave space modulation technique,which can be used to transmit microwave signal carrying 2-dimensional directional information.The main idea is that the phase difference from two modulating disk can be transferred into the signal parameter by two different coherent feeding sources.The single-antenna receiver could accomplish communication and direction-finding by demodulating signals in the beam-space.This paper presents how to choose the signal constellations of space-time modulation,how to design the scheme of the differential coding,and how to develop the algorithm of demodulating and estimating directional information.The performances of bit error rate and direction-finding through Gaussian channel are investigated.Simulation results show that the system is successfully designed to integrate communication with tracking at the level of transmit signals.更多还原