发明名称 |
MULTICARRIER TRANSMISSION USING A PLURALITY OF SYMBOL LENGTHS |
摘要 |
<p>Techniques to use OFDM symbols of different sizes to achieve greater efficiency for OFDM systems. The system traffic may be arranged into different categories (e.g., control data, user data, and pilot data). For each category, one or more OFDM symbols of the proper sizes may be selected for use based on the expected payload size for the traffic in that category.
In a further aspect, the channel response matrix for each of a plurality of subbands is decomposed in a manner to avoid arbitrary phase rotations from subband to subband by constraining the first element in each column of the first unitary matrix to be a non-negative value.
In another aspect, steering vectors are interpolated between subbands.</p> |
申请公布号 |
EP1557022(A2) |
申请公布日期 |
2005.07.27 |
申请号 |
EP20030779266 |
申请日期 |
2003.10.27 |
申请人 |
QUALCOMM, INCORPORATED |
发明人 |
WALTON, JAY, RODNEY;KETCHUM, JOHN, W.;WALLACE, MARK;HOWARD, STEVEN, J. |
分类号 |
H04B7/005;H04B7/04;H04B7/06;H04B7/08;H04L1/00;H04L1/06;H04L1/16;H04L12/28;H04L12/56;H04L25/02;H04L25/03;H04L27/26;H04W28/20;H04W52/50;(IPC1-7):H04L27/26 |
主分类号 |
H04B7/005 |
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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