動態(tài)規(guī)劃算法進行弱目標檢測的機理研究
Study on mechanism of dynamic programming algorithm for dim target detection
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摘要: 低信雜噪比環(huán)境中對弱小目標的檢測,已經(jīng)在信號處理、紅外圖像序列檢測等領(lǐng)域中引起人們的廣泛關(guān)注。動態(tài)規(guī)劃實際上是一個多階段決策的優(yōu)化問題,它是檢測前跟蹤(TBD)處理過程中提出的一種有效檢測弱小運動目標的方法。該文分析了動態(tài)規(guī)劃算法進行弱小目標檢測的機理,在此基礎(chǔ)上對兩類動態(tài)規(guī)劃算法進行了革新,并給出了一個統(tǒng)一的遞推關(guān)系式。仿真結(jié)果表明此算法對弱小目標具有較強的檢測能力,比一般的弱目標的檢測方法SNR性能上約提高3～5dB。Abstract: An important, problem in the field of signal processing, sequence of infrared image detection which arouses peoples attention widely is the detection and tracking of dim moving targets in very low Signal-to-Noise Ratio (SNR) or signal-to-clutter ratio environment. In fact, dynamic programming is a problem of multi-stage decision, and Dynamic Programming Algorithm (DPA) is an effective approach which was adopted during the process of Track-Before-Detect(TBD). In current work, the mechanism of dynamic programming algorithm is analyzed, and a number of technical innovations that improve the performance of DPA are presented. Simulation results show this approach has high ability of detection for dim moving targets, and achieves 3~5dB SNR. gains comparable to those of other detection algorithms.
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S.M. Tonissen, Performance of dynamic programming techniques for track-before-detect[J], IEEE Trans. on AES, 1996, AES-32(4), 1441-1450.[2]L. Harmon, Track-before-detect performance for a high PRF search mode[C], IEEE International Radar Conference, California, 1991, 11-15.[3]J. David, Track-before-detect processing for an airborne type radar, IEEE International Radar Conference, Virginia, 1990, 422-427.[4]Y. Barniv, Dynamic programming solution for detecting dim moving target[J], IEEE Trans. on AES, 1985, AES-21(1), 144-155.[5]J. Arnold, Efficient target tracking using dynamic programming[J], IEEE Trans. on AES, 1993,AES-29(1), 44-56.[6]張潤琦,動態(tài)規(guī)劃[M],北京,北京理工大學(xué)出版社,1989,10-15. -
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