Abstract
Enhanced Frequency Division Multiple Access (EFDMA) is a multiplexing scheme that transmits modulation symbols in the time domain and achieves a lower PAPR than OFDM. One EFDMA symbol occupies a plurality of groups of subbands spaced apart in a frequency band, and each of the subband groups includes a plurality of adjacent subbands. In order to generate one EFDMA symbol, a plurality of modulation symbols are mapped onto the first sequence of symbols. A transformation (eg, DFT) is performed on the first sequence to obtain a second sequence of values. To obtain a third sequence of values, the values in the second sequence corresponding to the subband used for the EFDMA symbol are maintained and the remaining values are erased. In order to obtain a fourth sequence of samples, an inverse transform (eg, IDFT) is performed on the third sequence. To form an EFDMA symbol, a phase ramp is applied to the fourth sequence and a cyclic prefix is added. (Selection) Figure 1
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