基于调频广播的单站无源定位系统实际相当于收发分置的双基雷达,且杂波和目标信号的传播均为小擦地角的低空传播.考虑低空传播以及直接采样系统中ADC器件的噪声,分析了低空探测时影响观测范围的主要因素.仿真实验验证了上述分析,并指出提高发射天线高度可以进一步提高该系统的低空探测能力.

The monostaic passive location systems based on FM broadcast signals are actually bistatic Radar systems , but having the characteristics that the ground clutters and the target signal propagate at low altitudes with small grazing angle. The propagation at low altitudes and the ADC noise in the RF direct sampling system taken are considered, and the main factors which affect the coverage of low altitude detection is analyzed. The results of simulation validate the above analysis above and show that the low altitude observation area increases with a higher transmitter antenna.

TN958

国防科技预研项目（41307010108）;国防科技预研基金（51407070101DZ0120）