发明名称 |
TWO-DIMENSIONAL CODE SPREADING FOR INTERLEAVED FDMA SYSTEM |
摘要 |
A transmitter comprises a first spreading unit configured to multiply each of multiple data symbols with a first spreading code sequence of a first spreading factor; a compression and repetition unit configured to compress output signals of the first spreading unit in time domain and repeat the compressed signal L times (where L is a natural number greater than or equal to 2); a phase modulation unit configured to multiply the compressed and repeated signal with a user dependent phase and output a data block consisting of L sub-blocks; a second spreading unit configured to replicate the data block according to a second spreading factor and multiply each set of the replicated sub-blocks with a second spreading code sequence of the second spreading factor to produce a two-dimensionally spread signal; and a wireless transmission unit configured to transmit the two-dimensionally spread signal using a single-carrier transmission scheme.
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申请公布号 |
US2011243197(A1) |
申请公布日期 |
2011.10.06 |
申请号 |
US200813127485 |
申请日期 |
2008.11.05 |
申请人 |
NTT DOCOMO, INC.;AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH |
发明人 |
ATARASHI HIROYUKI;SAWAHASHI MAMORU;CHIN FRANCOIS PO SHIN;LEI ZHONGDING;PENG XIAOMING;LIANG YING-CHANG |
分类号 |
H04B1/66;H04B1/69;H04B1/707;H04J13/00;H04J13/16 |
主分类号 |
H04B1/66 |
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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