发明名称 |
System and method for rapidly tracking vehicles of special utility in low signal-to-noise environments |
摘要 |
A system for facilitating the tracking of a target vehicle in connection with successively-received acoustic sensor signal data items. A fast Fourier transform operation is performed in connection with each successive acoustic sensor signal data item to generate a phase and amplitude beam map reflecting spectral signal energy in the received acoustic sensor signal data item. If the beam map for a acoustic sensor signal data item indicates that the item represents a signal having a signal-to-noise ratio above a first predetermined threshold value, a beam map generated for a previous acoustic sensor signal data item is used to generate a bounded beam map, a determination is made as to whether the bounded beam map represents a signal having a second predetermined signal-to-noise ratio. In response to a positive determination for the latter signal-to-noise determination, both the beam maps are used to generate tracking information for the target vehicle.
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申请公布号 |
US5471434(A) |
申请公布日期 |
1995.11.28 |
申请号 |
US19940324639 |
申请日期 |
1994.10.18 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE NAVY |
发明人 |
DAVIS, JOHN S.;GONG, KAI F.;HAMMEL, SHERRY E. |
分类号 |
G01S11/14;(IPC1-7):G01S15/00 |
主分类号 |
G01S11/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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