发明名称 |
MULTIPATH DOPPLER-ADJUSTED FREQUENCY TRACKING LOOP |
摘要 |
<p>A method and apparatus for frequency tracking is described. The present invention provides a tracking mechanism for removing the effects of error due to frequency offset as well as compensation for frequency error due to doppler in a plurality of multipath signals. Each finger of a RAKE receiver utilizing the present invention will compute a frequency error for that finger. The weighted average of all of these frequency errors is calculated and filtered to provide a control signal for varying the frequency of IF and RF frequency synthesizers, accounting for the common frequency offset seen at each finger. Additionally, each finger is equipped with a rotator for providing frequency adjustment specific to that finger. The frequency of each finger is adjusted through feedback of the frequency error for that finger.</p> |
申请公布号 |
EP1250763(B1) |
申请公布日期 |
2013.05.22 |
申请号 |
EP20010908718 |
申请日期 |
2001.01.26 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
AGRAWAL, AVNEESH;SIH, GILBERT;ROH, MARK;BUTLER, BRIAN;CHALLA, RAGHU |
分类号 |
H04L27/00;H04B1/7087;H04B1/7115;H04B1/7117 |
主分类号 |
H04L27/00 |
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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