基于时域插值的舰载高频地波雷达空时处理

Space-Time Processing for Shipborne HFSWR Based on Interpolation in Time Domain

天线相位中心偏置（DPCA）技术用于一阶海杂波的抑制可较好地解决舰载高频地波雷达的目标检测问题，但为补偿平台运动的不稳定性，需进行插值处理．基于信号时空等效性，本文提出了通过时域插值获得等效阵元信号进行空时二维滤波的方法．计算机仿真结果表明：只要平台匀速直线运动，通过时域插值就可获得较好的杂波抑制效果，这大大放松了空域插值对平台运动速度的限制．

Although DPCA is extended to attenuate first order Bragg for detection of target in shipbome HFSWR,inteapolation is necessary to compensate the vibration of platform motion. Considering the space-time equivalence of signal, interpolation in time domain is proposed to retrieve signal for space-time filtering, Simulation asults show thatthe method can remarkably attenuate the first order Bragg sea clutter if only platform the moves at constant velocity,whichdramatically stretch the rule on velocity of Platform by interpolation in spatial domain. The further research will focuson the non-uniform velocity of Platform and spare-time adaptive processing.