FREQUENCY DIVISION MULTIPLE ACCESS FOR WIRELESS COMMUNICATION

Abstract

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.

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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US2006291470A1	4G	20/12/2012	ISLD-201301-007	QUALCOMM INC	S1 TS Number: TS 136 211 Version No: ---- Section No: Release : ---- S2 TS Number: TS 136 213 Version No: ---- Section No: Release : ---- +1 -1	Yes	Basis Patent
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Technologies

Resource configuration

Signal Processing

Product

Base Station (eNB/gNB)

User Equipment (UE/Terminal)

Use Cases

Wireless communication

Services

Transmitting/receiving of data channel

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