- 专利标题: Enhanced frequency division multiple access for wireless communication
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申请号: US11431970申请日: 2006-05-10
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公开(公告)号: US20060291470A1公开(公告)日: 2006-12-28
- 发明人: Aamod Khandekar , Ravi Palanki
- 申请人: Aamod Khandekar , Ravi Palanki
- 专利权人: QUALCOMM Incorporated
- 当前专利权人: QUALCOMM Incorporated
- 主分类号: H04L12/56
- IPC分类号: H04L12/56
摘要:
Enhanced frequency division multiple access (EFDMA) is a multiplexing scheme that sends modulation symbols in the time domain and achieves a lower PAPR than OFDM. An EFDMA symbol occupies multiple subband groups that are spaced apart in a frequency band, with each subband group containing multiple adjacent subbands. To generate an EFDMA symbol, multiple modulation symbols are mapped onto a first sequence of symbols. A transform (e.g., a DFT) is performed on the first sequence to obtain a second sequence of values. The values in the second sequence corresponding to the subbands used for the EFDMA symbol are retained, and the remaining values are zeroed out to obtain a third sequence of values. An inverse transform (e.g., an IDFT) is performed on the third sequence to obtain a fourth sequence of samples. A phase ramp may be applied on the fourth sequence, and a cyclic prefix is appended to form the EFDMA symbol.
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