| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multiplex scheme for achieving low PAPR relative to OFDM. <P>SOLUTION: Enhanced frequency division multiple access (EFDMA) transmits modulation symbols in the time domain. An EFDMA symbol occupies multiple subband groups that are spaced apart in a frequency band, each subband group containing multiple adjacent subbands. To generate a symbol, multiple modulation symbols are mapped onto a first sequence. A transform is performed on the first sequence to obtain a second sequence. The values in the second sequence corresponding to the subbands used for the symbol are retained, and the remaining values are erased to obtain a third sequence. An inverse transform is performed on the third sequence to obtain a fourth sequence. A phase ramp is applied on the fourth sequence, and a cyclic prefix is appended to form the symbol. <P>COPYRIGHT: (C)2011,JPO&INPIT |
