Invention Grant
- Patent Title: Method and system for locating a geographical position using broadcast frequency modulation signals
- Patent Title (中): 使用广播频率调制信号定位地理位置的方法和系统
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Application No.: US12215832Application Date: 2008-06-30
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Publication No.: US07990314B2Publication Date: 2011-08-02
- Inventor: Henry H. Liao
- Applicant: Henry H. Liao
- Main IPC: G01S19/46
- IPC: G01S19/46 ; G01S5/02 ; G01S5/12
Abstract:
A method and system for locating and positioning using broadcast frequency modulation (FM) signals, is provided. One implementation involves receiving FM stereo signals from three FM stations at one or more receivers, each stereo signal including a modulated 19 KHz FM pilot tone; and determining a geographical position at each receiver based on the phase difference of the demodulated pilot tones in the received FM signals.
Public/Granted literature
- US20090322603A1 Method and system for locating a geographical position using broadcast frequency modulation signals Public/Granted day:2009-12-31
Information query
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