line of sight

The receiving methords under the strong interference of the direct signal of pulse compression radar altitude indicator in missile systems are discussed.

讨论强直达信号干扰下弹载脉压雷达高度表回波信号接收问题。

The difficulties of passive location using GSM and CDMA system for low-altitude flying target were introduced,which include the operation range,the cancel of direct signal,the synchronization precision and GDOP,and the solutions for them using more correlator time and particle filter algorithm aided by kinematic model of target were also proposed.

针对无源定位系统的特点和GSM,CDMA移动通信系统信号结构,详细分析了2种移动通信系统环境下实现对低空飞行目标无源定位的关键指标和主要技术参数,介绍了移动通信系统实现低空飞行目标无源定位存在的难点-作用距离、直达信号抑制、同步精度、几何精度因子等,对存在的难点给出了增加积累时间和目标运动模型辅助粒子滤波算法等解决建议。

Simulation results show that the difference between theoretical approximation and simulation is less than 3% when multipath-to-direct ratio(MDR) is-10 dB.

仿真结果表明,当多径直达信号幅度比(MDR)为-10 dB时,该理论分析方法的偏差小于3%。