发明名称 |
Multiple user adaptive modulation scheme for MC-CDMA |
摘要 |
In a multi-user frequency domain spreading downlink MC-CDMA system, a group of sub-carriers can be replaced by an equivalent sub-carrier of a conventional OFDM modem for purposes of resource allocation to improve the system performance. The chips for a given user are spread only within the group. Confinement insures synchronization between different users' chips that is essential to the recovering and separation of user symbols at the receiver. There is no limit imposed on the group size, which permits different spreading code lengths to be used for different scenarios or for performance tuning.
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申请公布号 |
US7123580(B2) |
申请公布日期 |
2006.10.17 |
申请号 |
US20040760033 |
申请日期 |
2004.01.16 |
申请人 |
NOKIA CORPORATION |
发明人 |
TANG CLIVE K;STOLPMAN VICTOR J |
分类号 |
H04B7/216;H04B7/26;H04L1/00;H04L5/02;H04L27/26 |
主分类号 |
H04B7/216 |
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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