发明名称 |
METHOD AND APPARATUS FOR UPLINK SYNCHRONIZATION IN WIRELESS COMMUNICATIONS |
摘要 |
<p>A method and system for uplink (UL) synchronization of an uplink transmission from a plurality of wireless transmit/receive units (WTRUs) to a Node-B in a code division multiple access (CDMA) system. A Node-B receives a transmission including a UL synchronization (SYNC_UL) sequence from a WTRU. A sampler samples the transmission at a sampling rate which is higher than a chip rate. The samples are down-sampled and the SYNC_UL sequence is detected at a lower rate. A first significant path location of the detected SYNC_UL sequence is determined, and based on the first significant path location, a final significant path location is determined. The final significant path location is quantized and UpPCH<SUB>POS </SUB>is transmitted to the WTRU to adjust a UL transmission timing.</p> |
申请公布号 |
EP1687915(B1) |
申请公布日期 |
2008.04.02 |
申请号 |
EP20040810253 |
申请日期 |
2004.11.03 |
申请人 |
INTERDIGITAL TECHNOLOGY CORPORATION |
发明人 |
BULTAN, AYKUT;GRIECO, DONALD, M.;DENNEAN, CHARLES;PAN, JUNG-LIN |
分类号 |
H04B7/26;H04B1/707;H04B7/216;H04L;H04L7/04;H04W56/00 |
主分类号 |
H04B7/26 |
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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