发明授权
- 专利标题: Identification and analysis of source emissions through harmonic phase comparison
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申请号: US13967557申请日: 2013-08-15
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公开(公告)号: US10416286B2公开(公告)日: 2019-09-17
- 发明人: Stephen Dorn Freeman , Walter John Keller, III
- 申请人: NOKOMIS, INC.
- 申请人地址: US PA Charleroi
- 专利权人: NOKOMIS, INC
- 当前专利权人: NOKOMIS, INC
- 当前专利权人地址: US PA Charleroi
- 代理机构: AP Patents
- 主分类号: G01S7/41
- IPC分类号: G01S7/41 ; G01S13/88 ; G01R29/08 ; G01S7/38 ; G01V3/12
摘要:
The present invention is a signal processing method to significantly improve the detection and identification of source emissions. More particularly, the present invention offers a processing method to reduce the false alarm rate of systems which remotely detect and identify the presence of electronic devices through an analysis of a received spectrum the devices' unintended emissions. The invention identifies candidate emission elements and determines their validity based on a frequency and phase association with other emissions present in the received spectrum. The invention compares the measured phase and frequency data of the emissions with a software solution of the theoretically or empirically derived closed-form expression which governs the phase and frequency distribution of the emissions within the source. Verification of this relationship serves to dramatically increase the confidence of the detection.