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1. 吉林大学 通信工程学院,吉林 长春,中国,130012
2. 吉林大学 工程仿生教育部重点实验室,吉林 长春,130022
收稿日期:2014-11-05,
修回日期:2014-12-05,
纸质出版日期:2015-03-25
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单泽彪, 石要武, 刘小松等. 应用人工蜂群算法的动态波达方向跟踪[J]. 光学精密工程, 2015,23(3): 838-845
SHAN Ze-biao, SHI Yao-wu, LIU Xiao-song etc. DOA tracking of moving targets by artificial bee colony algorithm[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 838-845
单泽彪, 石要武, 刘小松等. 应用人工蜂群算法的动态波达方向跟踪[J]. 光学精密工程, 2015,23(3): 838-845 DOI: 10.3788/OPE.20152303.0838.
SHAN Ze-biao, SHI Yao-wu, LIU Xiao-song etc. DOA tracking of moving targets by artificial bee colony algorithm[J]. Editorial Office of Optics and Precision Engineering, 2015,23(3): 838-845 DOI: 10.3788/OPE.20152303.0838.
针对目标信号源波达方向(DOA)的实时变化
将人工蜂群算法应用于最大似然函数的优化
实现了动态目标DOA的实时跟踪。首先
提出了一种可变遗忘因子的自适应样本协方差矩阵更新方法
该方法可根据目标信号源DOA变化的快慢自适应调整历史数据和当前采样数据在协方差矩阵中所占的权重
从而保证在获得较小稳态误差的同时又可获得较快的跟踪速度。然后
直接应用了性能优越的最大似然估计方法
避免了子空间跟踪类算法需要不断重复特征值或奇异值分解等问题。最后
采用人工蜂群仿生智能算法对似然函数的求解进行优化
从而极大地减少了算法的计算量
保证了算法的快速性和实时性。实验结果表明:在单快拍采样的情况下
信噪比为0 dB时
跟踪两个目标信号源的均方根误差为0.995 2°
基本达到了阵列信号处理中目标跟踪方法的设计要求。
To track the real changes of dynamic target DOA (Direction of Arrival) quickly and accurately
the artificial bee colony theory and a corresponding algorithm are used to optimize the likelihood function and to implement the real time tracking of dynamic target DOA. First
an adaptive subspace updating algorithm with a variable forgetting factor is proposed
which could adjust adaptively the weights of current and historical data in a covariance matrix according to the DOA change speed and could obtain a smaller stable error while a better tacking speed. Then
by making use of the maximum likelihood algorithm with superior performance
this method avoids the repetitious feature values and singular value decomposition in the subspace tracking algorithms. Finally
the artificial bee colony algorithm is used to optimize the likelihood function and to reduce the computation of the algorithm. Experimental results on sampling in singe snapshot indicate that the Root Mean Square Error ( RMSE) of DOA estimation is 0.995 2° under tracking estimation two signal sources with a SNR of 0 dB. It satisfies the requirements of design for target tracking method in an array signal processing.
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罗钧, 王强, 付丽. 改进蜂群算法在平面度误差评定中的应用 [J]. 光学 精密工程, 2012, 20(2):422-430. LUO J, WANG Q, FU L. Application of modified artificial bee colony algorithm to flatness error evaluation [J]. Opt. Precision Eng. , 2012, 20(2):422-430. (in Chinese)
张志成, 林君, 石要武, 等. 基于人工蜂群算法的波达方向和多普勒频率联合估计 [J]. 吉林大学学报:工学版, 2013, 43(4):1104-1109. ZHANG ZH CH, LIN J, SHI Y W, et al.. Joint direction-of-arrival and Doppler frequency estimation based on artificial bee colony algorithm [J]. Journal of Jilin University:Engineering and Technology Edition, 2013, 43(4):1104-1109. (in Chinese)
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