摘要
针对空-地测控链路的特点,本文提出了一种基于扩频机制的定向天线捕获跟踪方法,通过采用具有良好正交性能的两路伪随机序列对基带信号进行直序扩频和正交调制,并优化捕获跟踪算法,有效提高了系统的天线捕获跟踪性能。经测试验证,该方法具有抗干扰、捕获速度快、跟踪效率高等特点。
According to the characteristic of air-to-ground TT＆C link, an antenna capturing and tracking method based on Direct Sequence Spread Spectrum（DSSS） is proposed. By applying Two PN sequences with good orthogonality to the quadratic modulation of baseband signals and optimizing the algorithm, the capability of antenna capturing and tracking is improved. A number of flight tests demonstrate that this method brings not only an advantage of anti-interference, but also fast capturing and effective tracking.
出处
《航空电子技术》
2012年第3期6-9,15,共5页
Avionics Technology
关键词
定向天线
扩频
捕获跟踪
directional antenna
spread spectrum
capturing and tracking
