Adaptive symbol mapping modulation
US9768889B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2015 |
| Grant date | Sep 19, 2017 |
| Priority date | — |
| Expiry date | Jan 3, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0065
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The continuous demand for capacity and the limited available spectrum in wireless and wired communication has led to reliance on advanced modulation techniques to dramatically increase the number of bits per hertz per second. This demand in capacity and using the higher order constellations shorten the link range, and as a result, system gain becomes an important characteristic. The modulation techniques described here improve the system gain by, e.g., as much as 2.5 dB in high order modulations such as 4096-QAM. The modulation techniques include reducing the peak to average ratio and adding shaping gain. These techniques dramatically improve the system capacity, system gain, power consumption and system cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.