Low complexity decision feedback sequence estimation
US6381271B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 17, 1998 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Aug 17, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03235
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Decision Feedback Sequence Estimator (DFSE) metric is determined by storing one or more tables of Decision Feedback Estimation (DFE) hypotheses in a memory, and then using values of the DFE hypotheses that are retrieved from storage to determine the DFSE metric. The DFE hypotheses may be precalculated and stored into the memory prior to performance of any retrieval operation. Alternatively, the table may start out empty, and the DFE hypotheses may be determined as needed for a particular DFSE metric computation. The determined DFE metric may then be stored into a table for later retrieval if the metric is needed again. The DFE hypotheses may be stored into a single table or, to reduce memory requirements and computational complexity, may be stored into corresponding ones of plural tables. MLSE hypotheses, which are also used in the DFSE metric determination, may similarly be stored into one or more tables for later retrieval as needed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.