发明名称 |
Frequency-timing control loop for wireless communication systems |
摘要 |
A frequency-timing control loop comprising (1) a frequency control loop to acquire and track the frequency of a given signal instance in a received signal and (2) a timing control loop to acquire and track the timing of the same signal instance. The timing control loop processes data samples for the received signal to provide a first control indicative of timing error in the data samples for the signal instance. The frequency control loop includes (1) a frequency discriminator used to derive a second control indicative of frequency error in the data samples for the signal instance, and (2) a loop filter used to filter the first and second controls to provide a third control. This third control is used to adjust the frequency and phase of a periodic signal, which is used (directly or indirectly) to downconvert and digitize the received signal to provide the data samples.
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申请公布号 |
US6738608(B2) |
申请公布日期 |
2004.05.18 |
申请号 |
US20020075578 |
申请日期 |
2002.02.12 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
BLACK PETER J.;SINDHUSHAYANA NAGABHUSHANA T. |
分类号 |
H04L7/02;H04L27/00;(IPC1-7):H04B1/06 |
主分类号 |
H04L7/02 |
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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