发明名称 |
Method of tracking radio frequency signals |
摘要 |
Embodiments of the invention are directed to a method of keeping track of and staying tuned to a transmitter even when a receiver is moving at a relatively high speed. Electronic equipment carried on fast moving vehicles and comprising receiving means can experience a shift in the frequencies received due to Doppler shift. Embodiments provide a way of taking such a Doppler shift into account by means of acceleration measurements of the electronic equipment. Some embodiments may be used in electronic equipment containing a GPS receiver or the like, where re-tracking of satellites can be power and time consuming.
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申请公布号 |
US7663541(B2) |
申请公布日期 |
2010.02.16 |
申请号 |
US20050592244 |
申请日期 |
2005.03.02 |
申请人 |
SONY ERICSSON MOBILE COMMUNICATIONS AB |
发明人 |
KLINGHULT GUNNAR;HANSSON BJORN;CAMP WILLIAM O. |
分类号 |
G01S1/00;G01S5/02;G01C21/00;G01C21/20;G01S7/40;G01S11/10;G01S19/23;G01S19/25;G01S19/26;G01S19/27;G01S19/29;G01S19/39;G01S19/47;G01S19/48;H04B1/18 |
主分类号 |
G01S1/00 |
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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