Stable modulation index calibration and dynamic control
US10447511B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2018 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | Sep 5, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0093
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Calibrating a Gaussian frequency-shift keying modulation index includes generating a training sequence of bits, shaping a pulse from the training sequence according to an initial modulation index, and converting the shaped signal to a transmission signal. The transmission signal is then either looped through a radio frequency core or processed by frequency deviation estimation hardware to determine a frequency deviation. The frequency deviation is converted to a new modulation index, and potentially a ratio between a target modulation index and a measured modulation index as a scaling factor. The process is then iteratively repeated until a threshold frequency deviation is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.