GSM辐射源雷达中，天线接收信号存在着主基站的直达波、多径信号和其他同频基站的干扰信号，而利用普通波束形成方法获得的主基站直达波信号可能还会受到其他信号的污染，针对这些问题，提出利用子空间方法精确估计主基站直达波信号的来波方向，然后利用一种基于阻塞信号的自适应波束形成方法获得主基站直达波信号。通过仿真数据验证了文中所提方法的有效性，并利用实测数据进行了对比分析。研究结果表明，文中所提方法优于传统的线性约束最小方差自适应波束形成方法，更适合用于工程实践。
Abstract
In GSM based passive bistatic radar, the antenna not only receives the direct signal and multipath signals from the host station, but also receives the signals from other base stations with the same frequency. When the data-independent beamformer is used to acquire the direct signal of the host station, it may be polluted by other signals. The direction of the direct signal of the host station can be first measured by a sub-space method. Then the direct signal is acquired by the signal blocking based adaptive beamformer. The availability of proposed method is proved by simulation data and compared in the practical data. The result shows that the proposed method is more applicable than the traditional LCMV self-adaption beam forming method.
关键词
雷达工程 /
外辐射源雷达 /
GSM信号 /
直达波信号提取 /
阵列天线
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Key words
radar engineering /
passive biostatic radar /
GSM signal /
direct signal extraction /
array antenna
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参考文献
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