Invention Grant
US08542091B2 Control of transmitter peak power and duty ratio in a wireless system to maintain average transmitter power and increase communication range
有权
在无线系统中控制发射机峰值功率和占空比，以保持平均发射机功率并增加通信范围
- Patent Title: Control of transmitter peak power and duty ratio in a wireless system to maintain average transmitter power and increase communication range
- Patent Title (中): 在无线系统中控制发射机峰值功率和占空比，以保持平均发射机功率并增加通信范围
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Application No.: US12108505Application Date: 2008-04-23
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Publication No.: US08542091B2Publication Date: 2013-09-24
- Inventor: Ken Takei
- Applicant: Ken Takei
- Applicant Address: JP Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Miles & Stockbridge P.C.
- Priority: JP2007-117510 20070426
- Main IPC: G08C19/22
- IPC: G08C19/22 ; H04Q9/14
Abstract:
When supplying a power from a base station to a terminal station on radio and a distance from a base station to a terminal station is long, it becomes impossible for the terminal station to rectify the power. The feature of the present invention is found in a wireless communication system in which the peak value and duty ratio of a transmission power are controlled simultaneously, keeping the transmission power of a base station below a fixed value, thereby allowing a voltage to be applied to a diode, which is a component of a rectifier circuit possessed by a terminal station, always in excess of a threshold voltage of the diode, and energy is exchanged between the base station and the terminal station below a limit power.
Public/Granted literature
- US20080266060A1 TRANSMITTER AND WIRELESS SYSTEM USING THE SAME Public/Granted day:2008-10-30
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