发明名称 |
Frequency division multiplexing of multiple data streams in a wireless multi-carrier communication system |
摘要 |
Techniques for multiplexing multiple data streams using frequency division multiplexing (FDM) in an OFDM system are described. M disjoint "interlaces" are formed with U usable subbands. Each interlace is a different set of S subbands, where U=M.S. The subbands for each interlace are interlaced with the subbands for each of the other M-1 interlaces. M slots may be defined for each symbol period and assigned slot indices 1 through M. The slot indices may be mapped to interlaces such that (1) frequency diversity is achieved for each slot index and (2) the interlaces used for pilot transmission have varying distances to the interlaces used for each slot index, which improves channel estimation performance. Each data stream may be processed as data packets of a fixed size, and different numbers of slots may be used for each data packet depending on the coding and modulation scheme used for the data packet.
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申请公布号 |
US2005135308(A1) |
申请公布日期 |
2005.06.23 |
申请号 |
US20040968614 |
申请日期 |
2004.10.18 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
VIJAYAN RAJIV;WALKER GORDON K.;KRISHNAMOORTHI RAGHU;MURALI RAMASWAMY |
分类号 |
H04L27/28;(IPC1-7):H04L27/28 |
主分类号 |
H04L27/28 |
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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