机载外辐射源雷达空时处理中距离徙动校正算法研究

杨鹏程; 吕晓德; 张丹; 柴致海

doi:10.11999/JEIT160954

机载外辐射源雷达空时处理中距离徙动校正算法研究

doi: 10.11999/JEIT160954

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出版历程
- 收稿日期: 2016-09-22
- 修回日期: 2016-11-16
- 刊出日期: 2016-12-19

Research on Range Migration Compensation Algorithm in Space Time Processing for Airborne Passive Radar

摘要

摘要: 空时处理是实现机载外辐射源雷达杂波抑制和目标能量积累的有效手段。然而，外辐射源雷达目标信号微弱，需要在长相干处理时间(CPI)下进行空时处理，以提高目标信噪比。长CPI下，目标将出现距离徙动，造成积累增益损失，降低系统威力。针对上述问题，该文根据外辐射源雷达特点，提出将Keystone变换与3DT-SAP算法有机结合的距离徙动校正算法。该算法计算效率高，具有实时处理的潜力，能在抑制杂波的同时校正距离徙动，且校正过程信号能量损失小。仿真表明，该算法能充分抑制杂波，且对不同速度、不同强弱的目标进行有效的距离徙动校正，是一种高效、高性能的机载外辐射雷达距离徙动校正算法。
- 机载外辐射源雷达 /
- 距离徙动 /
- 空时处理 /
- Keystone变换 /
- 3DT-SAP
Abstract: Space time processing is an effective method for the suppression of clutters and the power integration of target echo for airborne passive radar. However, it needs long Coherent Processing Intervals (CPI) to improve target Signal-to-Noise Ratio (SNR) because of the weak target in passive radar, which leads to range migration and integration loss, and then lowers the system performance. Focusing on this problem, a range migration compensation algorithm is proposed, which combines Keystone transform with 3DT-SAP algorithm perfectly. This algorithm is efficient in computation and owns the potential for real time implementation. In addition, it can compensate the range migration with little power loss at the same time of clutter suppression. Simulations show that the proposed algorithm compensates the range migration of targets with different velocities and different powers effectively when suppressing clutters fully, which means it is an efficient and high-performance range migration compensation algorithm for airborne passive radar.
- Airborne passive radar /
- Range migration /
- Space time processing /
- Keystone transform /
- 3DT-SAP

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