Invention Grant
- Patent Title: Positioning system, position information transmitter, communication terminal, and control method of the positioning system
- Patent Title (中): 定位系统，位置信息发送器，通信终端以及定位系统的控制方法
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Application No.: US13205704Application Date: 2011-08-09
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Publication No.: US08299965B2Publication Date: 2012-10-30
- Inventor: Takamasa Kawaguchi , Tomoichi Ebata , Yutaka Shimogaki , Hitoshi Ogasawara
- Applicant: Takamasa Kawaguchi , Tomoichi Ebata , Yutaka Shimogaki , Hitoshi Ogasawara
- Applicant Address: JP Tokyo
- Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
- Current Assignee: Hitachi Industrial Equipment Systems Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Antonelli, Terry, Stout & Kraus, LLP.
- Priority: JP2008-102715 20080410
- Main IPC: G01S1/00
- IPC: G01S1/00
Abstract:
A position information transmitter including: a digital processing device including a CPU and a position information database storing position information of the position information transmitter and information of channels used by other position information transmitters; and a radio transmitting device executing a signal modulation, wherein the digital processing device generates spread spectrum signals from the position information of the position information transmitter and information of channels used by other position information transmitters, by using the C/A code, and the radio transmitting device modulates the spread spectrum signals and transmits modulated signals as a radio signals.
Public/Granted literature
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