发明名称 |
Methods and apparatus for code division multiple access communication using code book that provides reduced peak-to-average power ratio |
摘要 |
<p>A method and apparatus are provided for generating a code book for use in a CDMA system. The code book comprises of a plurality of vectors that are used to encode user data. The amplitude and polarity for each vector in the code book are selected to provide a reduced peak-to-average power ratio. The amplitude values can be selected to provide a reduced peak-to-average power ratio while maintaining a desired average energy per chip. The desired energy per chip can be based on the energy per chip of a CDMA system having a lower order spreading factor. Performance can be further improved by employing a first code book under a first signal-to-noise ratio condition and a second code book under a second signal-to-noise ratio condition.</p> |
申请公布号 |
EP1592157(A1) |
申请公布日期 |
2005.11.02 |
申请号 |
EP20050252370 |
申请日期 |
2005.04.15 |
申请人 |
LUCENT TECHNOLOGIES INC. |
发明人 |
ASHIKHMIN, ALEXEI;LIU, JUNG-TAO |
分类号 |
H04J11/00;(IPC1-7):H04J11/00 |
主分类号 |
H04J11/00 |
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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