Data transmission method, data demodulation method, apparatus and system
US9722844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2016 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Mar 3, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2646
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The transmission method includes: performing first-time series-parallel conversion on modulation symbols, and allocating the data to different subcarriers, by a sender side; performing second-time series-parallel conversion on the data allocated to each subcarrier, modulating the parallel data to Slepian signals orthogonal to each other; summing up the data modulated to different Slepian signals; further modulating the data to a subcarrier; and summing up the data in all subcarriers to form transmission signals. The demodulation method includes: calculating a pseudo-inverse of a matrix formed by subcarrier signals of a sender side by a receiver side; performing subcarrier demodulation on reception signals by using columns of the calculated pseudo-inverse matrix; and performing matching filtering demodulation on signals in each subcarrier by using Slepian signals orthogonal to each other to obtain estimation values of modulation symbols of the sender side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.