Signal transmission/reception system of orthogonal frequency division multiplexing
US7016298B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 20, 2001 |
| Grant date | Mar 21, 2006 |
| Priority date | — |
| Expiry date | May 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2627
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A transmission apparatus of orthogonal frequency division multiplexing for multiplexing a plurality of carriers orthogonal to one another to transmit a modulated signal. The transmission apparatus includes a first modulator for outputting a code modulated in accordance a modulation scheme which can be applied with a synchronous detection for demodulation, a second modulator for outputting a code modulated in accordance with a modulation scheme different from the modulation scheme associated with the first modulator, and a distributing circuit for distributing the codes modulated by the first and second modulators to a plurality of carriers. The distributing circuit distributes the code modulated by the second modulator to all or some of carriers existing within a predetermined number of columns from at least one of both end regions of a signal transmission frequency band, and the code modulated by the first modulator to the remaining carriers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.