发明名称 |
Method and apparatus for time tracking |
摘要 |
In order to time track an incoming signal, a receiver demodulates a first instance of a signal to produce a first set of energy values corresponding to a set of possible data values of the signal. The receiver also demodulates a second instance of the signal to produce a second set of energy values corresponding to the set of possible data values. The receiver combines the first and the second sets of energy values to determine a combined set of energy values. The receiver determines a first estimate of a most likely transmitted data value based upon the combined set of energy values. The receiver decovers an early set of despread samples of the first instance using a symbol corresponding to the first estimate to produce a first early energy value. The receiver decovers a late set of despread samples of the first instance using the symbol corresponding to the first estimate to produce a first late energy value. Finally, the receiver determines a time offset of the first instance based upon the first early and the first late energy values.
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申请公布号 |
US2002024991(A1) |
申请公布日期 |
2002.02.28 |
申请号 |
US20010812188 |
申请日期 |
2001.03.19 |
申请人 |
LEVIN JEFFREY A.;RIDDLE CHRISTOPHER C.;SHERMAN TOM |
发明人 |
LEVIN JEFFREY A.;RIDDLE CHRISTOPHER C.;SHERMAN TOM |
分类号 |
H04B1/707;(IPC1-7):H04L27/30;H04B15/00;H04K1/00 |
主分类号 |
H04B1/707 |
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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