发明名称 |
Wireless communication system |
摘要 |
In a wireless communication system, a portable device and an in-vehicle device wirelessly communicate with each other by a spread spectrum method. The in-vehicle device transmits a synchronization signal indicative of a reference period to the portable device. The in-vehicle device performs code acquisition for only a portion of a spread wireless signal received from the portable device. The portion has a starting point in a search period from a search start point to a search end point. The search start point is identified based on the reference period and a predetermined first correction time. The search end point is identified based on the reference period and a predetermined second correction time. |
申请公布号 |
US8270455(B2) |
申请公布日期 |
2012.09.18 |
申请号 |
US20090492347 |
申请日期 |
2009.06.26 |
申请人 |
SANJI KENICHIRO;TAKAOKA AKIRA;NAITO HIROMICHI;DENSO CORPORATION;NIPPON SOKEN, INC. |
发明人 |
SANJI KENICHIRO;TAKAOKA AKIRA;NAITO HIROMICHI |
分类号 |
H04B1/00 |
主分类号 |
H04B1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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