发明名称 |
TIME-GATED DELAY LOCK LOOP TRACKING OF DIGITAL TELEVISION SIGNALS |
摘要 |
A computer program product, apparatus, and method for use in determining the position of the use terminal includes receiving at the user terminal a digital television (DTV) broadcast signal transmitted by a DTV transmitter; tracking a periodic component of the DTV signal using a delay-lock loop (DLL), including selecting an observation interval based on the timing of the periodic component, and turning on a portion of the DLL during the observation interval, and turning the portion off otherwise; and determining a pseudo-range between the user terminal and the DTV transmitter based on the DTV broadcast signal; and wherein the position of the user terminal is determined based on the pseudo-range and a location of the DTV transmitter. |
申请公布号 |
WO03063462(A2) |
申请公布日期 |
2003.07.31 |
申请号 |
WO2003US01748 |
申请日期 |
2003.01.22 |
申请人 |
ROSUM CORPORATION;RABINOWITZ, MATTHEW;SPILKER, JAMES, J., JR. |
发明人 |
RABINOWITZ, MATTHEW;SPILKER, JAMES, J., JR. |
分类号 |
G01S5/00;G01S5/02;G01S5/14;G01S19/46;H04N7/24 |
主分类号 |
G01S5/00 |
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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