科技通报
科技通報
과기통보
BULLETIN OF SCIENCE AND TECHNOLOGY
2015年
2期
179-181
,共3页
多普勒%高速运动%目标检测%数据挖掘
多普勒%高速運動%目標檢測%數據挖掘
다보륵%고속운동%목표검측%수거알굴
Doppler%moving target%target detection%data mining
对高速运动目标的基带回波扩散参数的准确估计和挖掘是实现目标信号检测和参量估计的重要内容。高速运动目标在发射脉冲是产生多普勒扩散，导致在速度模糊的情况下对基带回波参数估计困难。提出一种基于AT-Tree模式挖掘模式的运动目标的基带回波扩散参数估计算法。构建高速运动目标信号模型和目标多普勒扩散模型，基于AT-Tree模式进行基带回波随机过程分析，建立项的平均概率值得到AT-Tree树型结构，将有序的项集添加到AT-Tree上，实现对基带回波扩散参数的挖掘和估计，在分辨力足够的前提下，对参数实现高分辨搜索，提高挖掘性能。仿真结果表明，该算法能使高速运动目标的基带回波调频信号在分数域上能形成明显的能量积聚，形成一个冲激函数，基带回波扩散参数的数据挖掘的精确度较高，精度较好，在制导参数估计和目标检测等领域应用价值较高。
對高速運動目標的基帶迴波擴散參數的準確估計和挖掘是實現目標信號檢測和參量估計的重要內容。高速運動目標在髮射脈遲是產生多普勒擴散，導緻在速度模糊的情況下對基帶迴波參數估計睏難。提齣一種基于AT-Tree模式挖掘模式的運動目標的基帶迴波擴散參數估計算法。構建高速運動目標信號模型和目標多普勒擴散模型，基于AT-Tree模式進行基帶迴波隨機過程分析，建立項的平均概率值得到AT-Tree樹型結構，將有序的項集添加到AT-Tree上，實現對基帶迴波擴散參數的挖掘和估計，在分辨力足夠的前提下，對參數實現高分辨搜索，提高挖掘性能。倣真結果錶明，該算法能使高速運動目標的基帶迴波調頻信號在分數域上能形成明顯的能量積聚，形成一箇遲激函數，基帶迴波擴散參數的數據挖掘的精確度較高，精度較好，在製導參數估計和目標檢測等領域應用價值較高。
대고속운동목표적기대회파확산삼수적준학고계화알굴시실현목표신호검측화삼량고계적중요내용。고속운동목표재발사맥충시산생다보륵확산，도치재속도모호적정황하대기대회파삼수고계곤난。제출일충기우AT-Tree모식알굴모식적운동목표적기대회파확산삼수고계산법。구건고속운동목표신호모형화목표다보륵확산모형，기우AT-Tree모식진행기대회파수궤과정분석，건립항적평균개솔치득도AT-Tree수형결구，장유서적항집첨가도AT-Tree상，실현대기대회파확산삼수적알굴화고계，재분변력족구적전제하，대삼수실현고분변수색，제고알굴성능。방진결과표명，해산법능사고속운동목표적기대회파조빈신호재분수역상능형성명현적능량적취，형성일개충격함수，기대회파확산삼수적수거알굴적정학도교고，정도교호，재제도삼수고계화목표검측등영역응용개치교고。
The accurate estimation of diffusion parameters and mining baseband echo of moving targets is very important for realizing the target signal detection and parameter estimation. The high speed moving target in the emission pulse is difficult to estimate the Doppler diffusion, leading to baseband echo parameters in the fuzzy velocity under. A mining model based on the AT-Tree model of the moving target parameter estimation algorithms of baseband echo diffusion is proposed. Construc?tion of the high speed moving target signal model and target Doppler diffusion model, analysis of baseband echo stochastic process based on AT-Tree mode, establish the average probability of worth to the AT-Tree tree structure, will set ordering items added to the AT-Tree, mining and estimation of baseband echo diffusion parameters, based on resolution enough, on parameters to achieve high resolution search, improve the mining performance. The simulation results show that the algo?rithm can make the baseband echo FM signal of high speed moving objects can form obvious energy accumulated in the frac?tional domain, the formation of an impulse function is obtained, baseband echo diffusion parameter data mining with high ac?curacy, it has good precision, it is a good guidance of parameter estimation and target detection, it has good application value.
