【摘要】 为抑制高频地波雷达工作复杂电磁环境中的射频干扰,需要对接收信号进行波束形成自适应处理。时变的波束形成系数破坏了积累周期中海面动目标和海杂波的相关性,多普勒处理后Bragg峰扩散引起基底抬高。利用保持相邻处理单元间相同距离门的海杂波响应一致的思想,提出了一种新的干扰抑制方法。仿真和实测数据处理结果表明保持海杂波的RF干扰抑制方法可较大的改善高频地波雷达抑制射频干扰的性能。更多还原

【Abstract】 In order to reject the spatial radio frequency interference (RFI) in the complex electromagnetism circumstance of high frequency (HF) radar, the time-varying adaptive beamforming is needed. Due to the time-varying beamforming coefficient breaks the correlation of target and sea-clutter in the whole coherent process interval (CPI), the Bragg peaks will spread after the Doppler processing. To maintain the sea-clutter response between the contiguity sub-CPIs consistent range bins, a new interference suppression method was proposed in this paper. Simulation and experimental data processing results show that the new method may greatly improve the performance of RFI suppression in HF radar.更多还原