Adaptive modulation scheme for multipath wireless channels
US8902725B2 · kind B2 · utility
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4References
11Claims
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Key dates
| Filing date | Jul 2, 2007 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | May 4, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03834
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A modulation method for data packets transmitted on a mobile communication channel, the method comprising a first linear modulation mode, to be used when the radio conditions are good, and a second constant envelop modulation mode, to be used when the radio conditions are poor. Since a constant envelope-modulated signal is degraded more when time dispersion occurs, the first linear modulation mode is also used when the time dispersion is severe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.