发明名称 |
Method and apparatus for automatically correcting receiver oscillator frequency |
摘要 |
A method and apparatus for automatically correcting the frequency of a local oscillator of a receiver. A primary common pilot channel (CPICH) code sequence is generated by a CPICH code generator based on a reference cell identification signal and a frame start signal. The received despread CPICH code sequence is used to generate an estimated frequency error signal. A control voltage signal is generated by a control voltage generator based on the estimated frequency error signal. The CPICH code generator generates the CPICH code sequence based on signals received from a high speed downlink packet access (HSDPA) serving cell when HSDPA is active, or a timing reference cell when HSDPA is not active. The present invention achieves full maximum ratio combining gain when space time transmit diversity (STTD) is used, even without receiving a transmit diversity indication.
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申请公布号 |
US2007058708(A1) |
申请公布日期 |
2007.03.15 |
申请号 |
US20050299502 |
申请日期 |
2005.12.12 |
申请人 |
INTERDIGITAL TECHNOLOGY CORPORATION |
发明人 |
BULTAN AYKUT;PAN JUNG-LIN;YANG RUI;KEARNEY KENNETH P. |
分类号 |
H04B3/46 |
主分类号 |
H04B3/46 |
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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