Efficient extension to viterbi decoder for TCM encoded and non-linear precoded inputs
US11038623B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2017 |
| Grant date | Jun 15, 2021 |
| Priority date | — |
| Expiry date | Oct 10, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/006
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A decoder circuit that supports non-linear precoded signals is disclosed. The decoder circuit comprises a modulo estimation circuit configured to receive a non-linear pre-coded quadrature amplitude modulated (QAM) data symbol and determine a modulo shift estimate associated with the received QAM data symbol, wherein the modulo shift estimate comprises a modulo shift that brings the received QAM symbol within the predetermined QAM constellation. The decoder circuit further comprises a QAM decoder circuit configured to map the received QAM data symbol to a winning constellation point, wherein the winning constellation point comprises a constellation point in an extended QAM constellation associated with the predetermined QAM constellation, and determine a quantized constellation point comprising a constellation point within the predetermined QAM constellation from the winning constellation point, based on applying the modulo shift corresponding to the modulo shift estimate to the winning constellation point.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.