发明名称 |
CDMA communication system and method |
摘要 |
In CDMA communications, a base station detects a difference between a reference phase of a spreading code and a phase of a received signal of each terminal station, and feeds a phase jump signal PJ-i representative of the phase difference back to each terminal station. After timing acquisition, the reception operation is performed using the reference phase, and a shift amount between the phase of a received signal and the reference phase is fed back to each terminal station as phase synchronization control information PC-i. Each terminal station coarsely adjusts the phase of the spreading code in accordance with the phase jump signal PJ-i, and thereafter finely adjust the phase of its transmitting signal in accordance with the phase synchronization control information PC-i. It is therefore possible to synchronize the phases of signals transmitted from terminal stations and received at the base station. Accordingly, an orthogonal code is used for spreading on reverse links. <IMAGE> |
申请公布号 |
EP1503514(B1) |
申请公布日期 |
2011.06.29 |
申请号 |
EP20040023413 |
申请日期 |
1997.07.01 |
申请人 |
HITACHI, LTD.;HITACHI DENSHI KABUSHIKI KAISHA |
发明人 |
ARIYOSHI, MASAYUKI;DOI, NOBUKAZU;SHIGA, TESSHIN;OHTA, YOSHITO |
分类号 |
H04B1/707;H04B1/7075;H04B1/7085;H04B7/26;H04J13/00;H04L7/02;H04W92/10 |
主分类号 |
H04B1/707 |
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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