低空目标长时间积累检测技术研究

低空目标信号通常淹没在强杂波和噪声环境中,严重制约了对目标的有效检测。针对低空目标检测难点,对基于频域包络移位补偿算法的长时间积累检测技术的工作原理和积累效能进行了理论分析。研究结果表明:当目标跨越距离单元较少时,脉压加权可有效降低跨距离单元损耗;当目标跨越多个距离单元时,采用基于频域包络移位补偿算法可显著提高目标的可检测性。研究结果对长时间积累工程化设计有借鉴意义。

Research into Detection Technology of Long-time Accumulation for Low-altitude Target

The low-altitude target signals are often submerged by strong clutters and noise,which restricts the effective detection to low-altitude target severely.This paper performs the theoretic analysis for the operating principle and accumulation effectiveness of long time accumulation detection technology based on frequency domain envelope shift compensation algorithm.Research results indicate：when the target spans a few range cells,the loss spanning range cells can be reduced effectively through pulse compression weighting;when the target spans multiple range cells,the detection probability for target can be improved observably by using the compensation algorithm based on frequency domain envelope shift.The research results can be used for reference to the engineering design of long time accumulation.