发明名称 |
ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING-CODE DIVISION MULTIPLE ACCESS SYSTEM |
摘要 |
An orthogonal frequency division multiplexing (OFDM)-code division multiple access (CDMA) system is disclosed. The system includes a transmitter and a receiver. At the transmitter, a spreading and subcarrier mapping unit spreads an input data symbol with a complex quadratic sequence code to generate a plurality of chips and maps each chip to one of a plurality of subcarriers. An inverse discrete Fourier transform is performed on the chips mapped to the subcarriers and a cyclic prefix (CP) is inserted to an OFDM frame. A parallel-to-serial converter converts the time-domain data into a serial data stream for transmission. At the receiver, a serial-to-parallel converter converts received data into multiple received data streams and the CP is removed from the received data. A discrete Fourier transform is performed on the received data streams and equalization is performed. A despreader despreads an output of the equalizer to recover the transmitted data.
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申请公布号 |
US2011142094(A1) |
申请公布日期 |
2011.06.16 |
申请号 |
US20110984101 |
申请日期 |
2011.01.04 |
申请人 |
INTERDIGITAL TECHNOLOGY CORPORATION |
发明人 |
PAN JUNG-LIN;ZHANG GUODONG;TSAI YINGMING |
分类号 |
H04B1/69 |
主分类号 |
H04B1/69 |
代理机构 |
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地址 |
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