基于四传感器方阵的地震动目标方位角估计
|
摘要
针对地震动目标定位中的信号传播速度不确定性问题,提出了基于到达时间差的四传感器方阵目标方位角估计方法。从理论上推导出四传感器方阵下的目标方位角估计带边界及其最大带宽值,证明了信号传播速度与目标方位角估计之间的弱相关性。根据仿真计算深人探讨了信号传播速度和时延测量误差对目标方位角估计精度的影响。外场实验结果证明:这一方法的地震动目标方位角平均估计误差小于采用三轴地震动传感器的方法,具有一定的实用价值。
A new approach in moving target bearing estimation based on time differences of arrival of seismic signals received at a four-sensor square array is proposed.The weak correlation between propagation speed of signals and bearing estimation under such sensor layout is exploited in theory,simple and explicit expressions of bearing margins as well as the maximum bearing estimation band range are deduced.Influence of signal propagation speed and time delay measurement errors on precision of bearing estimation is discussed according to simulation computation.It is eventually demonstrated through field experiment that this technique has a smaller bearing estimation error than the commonly used three-axis geophones and it has certain application value.
A new approach in moving target bearing estimation based on time differences of arrival of seismic signals received at a four-sensor square array is proposed.The weak correlation between propagation speed of signals and bearing estimation under such sensor layout is exploited in theory,simple and explicit expressions of bearing margins as well as the maximum bearing estimation band range are deduced.Influence of signal propagation speed and time delay measurement errors on precision of bearing estimation is discussed according to simulation computation.It is eventually demonstrated through field experiment that this technique has a smaller bearing estimation error than the commonly used three-axis geophones and it has certain application value.
引文
[1]朱庆厚.到达时间差(TDOA)测向定位研究[J].电讯技术,2007,47(1):53—56.
[2]邓平,李莉,范平志.一种TDOA/AOA混合定位算法及其性能分析[J].电波科学学报,2002,17(6):633—636.
[3]仲祺琪,毛卫宁.利用DOA的双基阵被动定位算法研究[J].声学与电子工程,2003,70(2):15-18.
[4]陈玲,李少洪.无源测向测时差定位算法研究[J].电子与信息学报,2003,25(6):771—776.
[5]黄高明,杨绿溪,何振亚.基于典范相关分析的时差测向技术研究[J].电路与系统学报,2005,10(5):10-15.
[6]李志宇,马昌萍.时延差优选估计声源定向算法[J].声学技术,2010,29(2):158—161.
[7]黄国信,高勇.四元传声器阵列定向算法及其结构优化[J].声学技术,2009,28(1):78—81.
[8]Yao K.Hudson R E.Reed C W,et al.Blind beamforming on a randomly distributed sensor array system[J].IEEE Journal on Selected Areas in Communications,1998,16:1555—1567.
[9]Zheng J,Lui K W,So H C.Accurate three-step algorithm for joint source position and propagation speed estimation[J].Signal Processing,2007,87:3096-3100.
[10]Chen J C.Yao K,Hudson R E.Source localization and beamforming[J].IEEE Signal Processing Magazine,2002,19:30-39.
[11]Richman M S,Deadrick D S,Nation R J,et al.Personnel tracking using seismic sensore[C]//Proc of the International Symposium on Aerospace/Defense Sensing,Simulation,and Controls,Orlando,USA,SPIE,2001:14-21.
[12]Pakhomov A,Sicignano A,Sandy M,et al.Single and three-axis geophone:Footstep detection with bearing estimation,localization,and tracking[C]//Proc of Unattended Ground Sensor Technologies and Applications V,Orlando,USA:SPIE,2003:155-161.
[13]张磊.基于三轴地震动传感器的目标定向算法研究和硬件实现[D].南京:南京理工大学,2004.
[14]Knapp C,Carter G.The generalized correlation method for estimation of time delay[J].IEEE Transactions on Acoustics,Speech and Signal Processing,1976,24:320-327.
[2]邓平,李莉,范平志.一种TDOA/AOA混合定位算法及其性能分析[J].电波科学学报,2002,17(6):633—636.
[3]仲祺琪,毛卫宁.利用DOA的双基阵被动定位算法研究[J].声学与电子工程,2003,70(2):15-18.
[4]陈玲,李少洪.无源测向测时差定位算法研究[J].电子与信息学报,2003,25(6):771—776.
[5]黄高明,杨绿溪,何振亚.基于典范相关分析的时差测向技术研究[J].电路与系统学报,2005,10(5):10-15.
[6]李志宇,马昌萍.时延差优选估计声源定向算法[J].声学技术,2010,29(2):158—161.
[7]黄国信,高勇.四元传声器阵列定向算法及其结构优化[J].声学技术,2009,28(1):78—81.
[8]Yao K.Hudson R E.Reed C W,et al.Blind beamforming on a randomly distributed sensor array system[J].IEEE Journal on Selected Areas in Communications,1998,16:1555—1567.
[9]Zheng J,Lui K W,So H C.Accurate three-step algorithm for joint source position and propagation speed estimation[J].Signal Processing,2007,87:3096-3100.
[10]Chen J C.Yao K,Hudson R E.Source localization and beamforming[J].IEEE Signal Processing Magazine,2002,19:30-39.
[11]Richman M S,Deadrick D S,Nation R J,et al.Personnel tracking using seismic sensore[C]//Proc of the International Symposium on Aerospace/Defense Sensing,Simulation,and Controls,Orlando,USA,SPIE,2001:14-21.
[12]Pakhomov A,Sicignano A,Sandy M,et al.Single and three-axis geophone:Footstep detection with bearing estimation,localization,and tracking[C]//Proc of Unattended Ground Sensor Technologies and Applications V,Orlando,USA:SPIE,2003:155-161.
[13]张磊.基于三轴地震动传感器的目标定向算法研究和硬件实现[D].南京:南京理工大学,2004.
[14]Knapp C,Carter G.The generalized correlation method for estimation of time delay[J].IEEE Transactions on Acoustics,Speech and Signal Processing,1976,24:320-327.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心