Precompensation of interference induced by an OFDM/OQAM modulation that is faster than Nyquist
US10404498B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Dec 13, 2016 |
| Grant date | Sep 3, 2019 |
| Priority date | — |
| Expiry date | Dec 13, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2698
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to precoding (or rather pre-equalization) for a faster-than-Nyquist OFDM or OFDM/OQAM type transmitter. Compression of faster-than-Nyquist OFDM pulses over time introduces an inter-symbol interference (ISI) and a sub-carrier interference (ICI). Assuming a Gaussian-type channel (AWGN), the ISI and ICI can be estimated at the transmitter and, in this way, some of the symbols (at most half) can be precoded (according to the value of the adjacent symbols), such as to cancel the ISI and ICI introduced during transmission and reception.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.