Multi-standard BCPM demodulator using Viterbi algorithm
US10924311B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2020 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | May 15, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/14
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present document relates to a Viterbi-based GFSK (Gaussian frequency-shift keying) demodulator that supports different modulation index ranges. In particular, the present document relates to a circuit and a corresponding method for demodulating a base band signal. For example, the base band signal may have an in-phase component and a quadrature component. The method includes determining a phase-modulated signal based on the base band signal. The method includes determining a scaled phase signal by scaling the phase-modulated signal using a scaling factor. The method includes determining discrimination signals based on the scaled phase signal using a periodic discrimination function. The method includes applying a Viterbi algorithm to the discrimination signals for determining an output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.