System and method for communicating using SCMA
US10425198B2 · kind B2 · utility
3Cited by
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Key dates
| Filing date | Jul 7, 2016 |
| Grant date | Sep 24, 2019 |
| Priority date | — |
| Expiry date | Aug 31, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods for DFT-S-SCMA (discrete Fourier Transform-spread-sparse code multiple access) are provided. Input bits are encoded with an SCMA encoder. The output is precoded with a IDFT (inverse DFT) to produce a precoded SCMA block. Multiple precoded SCMA blocks are combined at the input of a DFT. This is done in parallel for multiple sets of SCMA blocks at multiple DFTs. Then, the outputs of the DFTs are combined and OFDM modulated. This approach can be used to improve the PAPR (peak to average power ratio) at the output of the OFDM modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.