Orthogonal time frequency space modulation over a plurality of narrow band subcarriers
US10693581B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2016 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Dec 31, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L5/0016
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An Orthogonal Time Frequency Space Modulation (OTFS) modulation scheme that maps data symbols, along with optional pilot symbols, using a symplectic-like transformation such as a 2D Fourier transform and optional scrambling operation, into a complex wave aggregate and be backward compatible with legacy OFDM systems, is described. This wave aggregate may be processed for transmission by selecting portions of the aggregate according to various time and frequency intervals. The output from this process can be used to modulate transmitted waveforms according to various time intervals over a plurality of narrow-band subcarriers, often by using mutually orthogonal subcarrier “tones” or carrier frequencies. The entire wave aggregate may be transmitted over various time intervals. At the receiver, an inverse of this process can be used to both characterize the data channel and to correct the received signals for channel distortions, thus receiving a clear form of the original data symbols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.