OFDMA signal transmission apparatus and method
US6726297B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 2000 |
| Grant date | Apr 27, 2004 |
| Priority date | — |
| Expiry date | Jan 20, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2628
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a transmission section, which performs an OFDMA signal transmission, a plurality of serial signals is converted to parallel signals by a plurality of serial/parallel converters, the plurality of converted parallel signals are rearranged at intervals of a power of 2 by a rearranging apparatus, sub-carrier assignment is performed, and inverse Fourier transform is performed with respect to the number of sub-carriers, which has been varied depending on the number of rearranged parallel signals, so as to be changed to time waveforms. The transformed parallel signals are converted to serial signals by the parallel/serial converter, the converted serial signals are converted to analog signals by D/A converter and orthogonal modulator, thereafter converting the analog signals to high frequency signals so as to be emitted. This configuration allows the amount of operations and power consumption to be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.