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为简化基于MIMO(多输入多输出)技术的天波雷达扩展多普勒杂波抑制方法,分析了时间叉排线性调频连续波MIMO天波雷达与慢时间相位编码MIMO天波雷达之间的关系,提出一种分时波束空间MIMO天波雷达模型,并给出了相应的TADBF方法.该TADBF方法在分时波束空间实现,可有效抑制扩展多普勒杂波;简化了发射信号分集,在大型阵列降维处理情况下,只在各脉冲重复周期控制波束指向,无须对子阵或者波束进行相位编码,便于工程实现.仿真验证了该方法的有效性.
In order to simplify the Doppler clutter suppression method based on MIMO (Multiple Input Multiple Output) technology, the relationship between time-delayed linear FM continuous-wave MIMO sky-wave radar and slow-time phase-coded MIMO sky-wave radar is analyzed. Time-space beamforming MIMO sky-wave radar model and the corresponding TADBF method is given.The TADBF method is implemented in time-sharing beam space, which can effectively suppress the extended Doppler clutter, simplify the transmit signal diversity, In the case of processing, the beam steering is controlled only at each pulse repetition period without the phase encoding of the sub-array or the beam, which is convenient for engineering implementation. The simulation verifies the effectiveness of the method.