Invention Grant
- Patent Title: Enhanced frequency division multiple access for wireless communication
- Patent Title (中): 用于无线通信的增强型频分多址
-
Application No.: US11431970Application Date: 2006-05-10
-
Publication No.: US08077692B2Publication Date: 2011-12-13
- Inventor: Aamod Khandekar , Ravi Palanki
- Applicant: Aamod Khandekar , Ravi Palanki
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Donald C. Kordich
- Main IPC: H04L12/56
- IPC: H04L12/56

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.
Public/Granted literature
- US20060291470A1 Enhanced frequency division multiple access for wireless communication Public/Granted day:2006-12-28
Information query