发明名称 |
Method, mobile station and base station for frequency synchronization of a mobile station in a radio communications system |
摘要 |
A TDMA/CDMA radio communications system provides frequency channels which are formed both by time slots and by broadband frequency ranges, and in which information from a plurality of connections can be simultaneously transmitted between mobile stations and a base station wherein it is possible to distinguish the information from different connections in accordance with a connection-specific fine structure. Frequency channels are repeatedly provided for frequency synchronization of the mobile stations in the downward direction in which a symbol sequence is transmitted. From received signals, the mobile station to be synchronized determines estimated values for the symbol sequence and compares these estimated values with a reference sequence. It is thereby possible to calculate a phase drift in the estimated values with reference to the reference sequence wherein a frequency offset, which is used for frequency synchronization, is determined from the phase drift.
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申请公布号 |
US6577615(B1) |
申请公布日期 |
2003.06.10 |
申请号 |
US19990446197 |
申请日期 |
1999.12.16 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
RITTER GERHARD;KLEIN ANJA |
分类号 |
H04L27/14;H04B7/26;H04J13/00;H04L7/00;H04L27/22;(IPC1-7):H04B15/00 |
主分类号 |
H04L27/14 |
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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