Method and device for reducing quantification noise for transmitting a multi-carrier signal
US8699591B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 2010 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | Apr 1, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2626
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus to reduce the level of quantification noise when transmission power varies with frequency. Power variation is carried out in the analog domain by filtering a frequency band and attenuating a complementary band in two signal analog-processing paths. More precisely, the method for reducing the quantification noise for transmitting a multi-carrier signal comprises an IFFT conversion step, a digital-to-analog conversion step and an analog-processing step of the signal frequencies on a band having a maximal frequency. Moreover, the analog processing step includes at least two processing paths in parallel to the analog signal, in which: for at least one first path, the signal is filtered so as to retain only the frequencies of a low-frequency band and, in parallel in at least one second path, the signal is subjected to gain, amplification or gain attenuation and, in a final step, the signals from the paths are summed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.