機載外輻射源雷達空時處理中距離徙動校正算法研究

楊鵬程; 呂曉德; 張丹; 柴致海

doi:10.11999/JEIT160954

機載外輻射源雷達空時處理中距離徙動校正算法研究

doi: 10.11999/JEIT160954

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- 文章訪問數(shù): 1527
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出版歷程
- 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: 空時處理是實現(xiàn)機載外輻射源雷達雜波抑制和目標能量積累的有效手段。然而，外輻射源雷達目標信號微弱，需要在長相干處理時間(CPI)下進行空時處理，以提高目標信噪比。長CPI下，目標將出現(xiàn)距離徙動，造成積累增益損失，降低系統(tǒng)威力。針對上述問題，該文根據(jù)外輻射源雷達特點，提出將Keystone變換與3DT-SAP算法有機結合的距離徙動校正算法。該算法計算效率高，具有實時處理的潛力，能在抑制雜波的同時校正距離徙動，且校正過程信號能量損失小。仿真表明，該算法能充分抑制雜波，且對不同速度、不同強弱的目標進行有效的距離徙動校正，是一種高效、高性能的機載外輻射雷達距離徙動校正算法。
- 機載外輻射源雷達 /
- 距離徙動 /
- 空時處理 /
- Keystone變換 /
- 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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