发明授权
- 专利标题： Position information estimation device, method thereof, and program
- 专利标题（中）： 位置信息估计装置及其方法
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申请号： US10508708申请日： 2004-03-03
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公开(公告)号： US07039546B2公开(公告)日： 2006-05-02
- 发明人: Hiroshi Sawada , Ryo Mukai , Shoko Araki , Shoji Makino
- 申请人： Hiroshi Sawada , Ryo Mukai , Shoko Araki , Shoji Makino
- 申请人地址： JP Tokyo
- 专利权人： Nippon Telegraph and Telephone Corporation
- 当前专利权人： Nippon Telegraph and Telephone Corporation
- 当前专利权人地址： JP Tokyo
- 代理机构： Oblon, Spivak, McClelland, Maier & Neustadt, P.C.
- 优先权： JP2003-057070 20030304; JP2003-297580 20030821
- 国际申请： PCT/JP2004/002610 WO 20040303
- 国际公布： WO2004/079388 WO 20040916
- 主分类号： G01C9/00
- IPC分类号： G01C9/00
摘要：
Signals from a plurality of sources are observed by a plurality of sensors disposed in two dimensions, and the observed signals are subject to a short-time Fourier transform, from which frequency domain signals are derived. Using the independent component analysis process on the frequency domain signals, separation matrices are produced, and an inverse matrix of each separation matrix is calculated. The direction of each source is calculated based on a ratio of a pair of elements in each column of the inverse matrix.
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