Adaptive synchronizer for a demodulation chain
US11063739B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2018 |
| Grant date | Jul 13, 2021 |
| Priority date | — |
| Expiry date | Dec 22, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention relates to an adaptive synchronization device for demodulating a signal in linear modulation (x). The device functions from a sampled version of the signal (x). The device being characterized in that it comprises: —at least one synchronization module (F) comprising: —at least one first sub-module (Fn) arranged to deliver a first output signal (y) from the input signal (x) received at a period (T) less than the value (I) with (B) the bandwidth of the input signal (x); this first sub-module (Fn) is capable of compensating a transmission delay of the input signal (x) by estimation of the propagation delay (τ) between a transmitter and a receiver of a transmission medium; this first sub-module adapts the rate at its output to one sample per symbol; —at least one second sub-module (Fu) arranged to deliver a corrective (δτ) to be applied to the current estimation of the delay (τ), from an error term (w) defining the decision error of the device and the influence of the processings downstream of the first sub-module (F); —at least one correction module of transmission imperfections (H), disposed downstream of the synchronization module (F) and forming a correction ch…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.