发明名称 |
Method and apparatus for compensating for phase noise of symbols spread with a long spreading code |
摘要 |
A method and apparatus for compensating for phase noise of symbols spread with a long spreading code are disclosed. To compensate for the phase noise, a phase error estimate is generated from despread symbols with a short spreading code. A phase correcting phasor is applied to chip rate data before despreading the data with a long spreading code. A signal-to-interference ratio (SIR) on a common pilot channel (CPICH) may be calculated by spreading the data with a parent spreading code in an orthogonal variable spreading factor (OVSF) code tree and by combining symbols. Alternatively, a magnitude of the symbols may be used in estimating the SIR. The SIR of a channel using a short spreading code and an SIR of a channel using a long spreading code are measured. The SIR of the channel with the long spreading code may be compensated in accordance with a difference between degradation of the SIRs.
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申请公布号 |
US7561615(B2) |
申请公布日期 |
2009.07.14 |
申请号 |
US20050301198 |
申请日期 |
2005.12.12 |
申请人 |
INTERDIGITAL TECHNOLOGY CORPORATION |
发明人 |
PIETRASKI PHILIP J.;BELURI MIHAELA;YANG RUI;CHINCHOLI AMITH VIKRAM;KEARNEY KENNETH P. |
分类号 |
H04B1/69;H04B7/216 |
主分类号 |
H04B1/69 |
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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