发明名称 |
Demodulation apparatus and receiving apparatus |
摘要 |
A portable phone device comprises a telephone unit for base band processing of a receiving signal and audio conversion processing, as well as a global positioning system (GPS) receiving unit for receiving signals from at least one GPS satellite, each signal including a spread code. A crystal oscillator generates a first oscillation signal having a predetermined frequency, and a temperature controlled oscillator generates a second oscillation signal having a predetermined frequency different from that of the first oscillation signal. A synchronization capture portion performs synchronization capture of the spread code, and a synchronization hold portion performs synchronization holding and demodulation of the signals received from the at least one GPS satellite. A central processing unit calculates position and speed of the portable phone device. |
申请公布号 |
US8229460(B2) |
申请公布日期 |
2012.07.24 |
申请号 |
US20090484357 |
申请日期 |
2009.06.15 |
申请人 |
TANAKA KATSUYUKI;SAWADA MASAYUKI;TAKAHASHI HIDEKI;TERANISHI KOICHIRO;SONY CORPORATION |
发明人 |
TANAKA KATSUYUKI;SAWADA MASAYUKI;TAKAHASHI HIDEKI;TERANISHI KOICHIRO |
分类号 |
H04W24/00;G01S19/29;G01S19/31;G01S19/37;H03J1/00;H03L7/193;H04B1/26;H04B1/707 |
主分类号 |
H04W24/00 |
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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