Invention Grant
- Patent Title: Wireless communication device, wireless communication system, and method for detecting receive timing of direct wave
- Patent Title (中): 无线通信装置,无线通信系统以及直接波接收定时检测方法
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Application No.: US12798301Application Date: 2010-03-31
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Publication No.: US08351547B2Publication Date: 2013-01-08
- Inventor: Tetsuhiko Miyatani
- Applicant: Tetsuhiko Miyatani
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electromnics Co., Ltd.
- Current Assignee: Samsung Electromnics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Priority: JP2009-085194 20090331
- Main IPC: H03K9/00
- IPC: H03K9/00

Abstract:
A wireless communication device and method are capable of detecting a receive timing of a direct wave at higher precision without increasing transmit power. A signal receiver receives a signal having a center frequency changed in a predetermined rule at predetermined time intervals. A time-frequency transformer transforms the received signal from a time domain to a frequency domain. A filter removes frequency-domain signal components unused during reception, based on the predetermined rule, from the frequency-domain signal. A reverse modulator performs a reverse modulation process on the remaining signal components. A signal adder generates an added signal by performing accumulative addition on the signal components that underwent the reverse modulation process in the reverse modulator for a predetermined period. A direct wave arrival time determiner determines an arrival time of a direct wave according to an impulse response obtainable from an output of the frequency-time transformer.
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