高频地波雷达电台干扰的抑制

为抑制高频地波雷达电台干扰,提出用线性极化变换(LPVT)、非线性极化变换(NLPVT)和多凹口逻辑积极化(MLP)滤波相结合进行极化处理的方法。通过减小干扰极化状态的散落区域,降低干扰散落中心的不确定性,有效提高了滤波器性能。为实现实时处理,利用改进的多凹口逻辑积极化滤波算法解决了处理速度和凹口数量之间的矛盾。结合实际录取的高频雷达电台干扰数据,通过仿真实验证明该方法的有效性。实际雷达数据处理结果表明该方法可使信干比改善20dB以上。

Radio disturbance suppression for HFSWR

To suppress the radio disturbance of high frequency surface wave radar (HFSWR), a method of polarization signal processing is proposed, which integrates polarization-vector translation (LPVT), nonlinear polarization-vector translation (NLPVT) and multinotch logic-product polarization (MLP) filtering together. Through reducing the area of spread of disturbance in polarization space, the indefiniteness of the disturbance scattering center decreases, and the filter performance is improved effectively. Then, to achieve the real time signal processing, an improved MLP algorithm is put forward to resolve the inconsistency between processing speed and notches number. Combined with the experimental data of radio disturbance of the HFSWR, an example of simulation demonstrates the effectiveness of this approach. It is indicated from the experimental data processing that the signal to interference ratio (SIR) can be improved over 2 dB.