摘要
移动通信基站在城市几乎达到全覆盖。若以低空目标探测为背景,利用基站发射的OFDM信号研究基于被动雷达阵列的低空目标回波信号处理方法,则可以实现低空目标的探测。首先建立圆形均匀排布被动雷达接收阵元模型,推导OFDM信号的目标回波模型,然后提出一种基于数字波束形成的目标方位、俯仰角估计方法和一种基于改进恒虚警检测器的目标检测方法,实现目标三维位置的估计。仿真实验验证了方法的有效性。
The OFDM communication has been applicated widely. Base stations are widely spread in urban. In order to detect the low-altitude targets, the method that combines the OFDM signal generated by base stations with the passive radar antennas array can receive the echoes of low-altitude targets. After signal processing, low-altitude detection and early-warning can be realized. At first, the uniform circular array model is established and the echo model of OFDM signal is deduced. Then, the method that gets the information of azimuth and pitch based on digital beam forming and an improved constant false alarm rate detector is presented. The integration effect is obtained according to the result of the 3D target detection. At last, the availability of the proposed method is proved through simulation and analysis.
出处
《雷达科学与技术》
北大核心
2016年第6期635-641,647,共8页
Radar Science and Technology
基金
国家自然科学基金(No.61501481)
关键词
正交频分复用
低空目标探测
被动雷达
数字波束形成
恒虚警检测
orthogonal frequency division multiplexing（OFDM）
low-altitude target detection
passive radar
digital beam forming
constant false alarm rate
