Apparatus for receiving and recovering frequency shift keyed symbols
US6487240B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 10, 2000 |
| Grant date | Nov 26, 2002 |
| Priority date | — |
| Expiry date | Feb 16, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2334
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A receiver architecture includes a selectivity filter (206) for selectively passing a wanted channel and rejecting unwanted channels. The selectivity filter has a filter BT of about one-half the BT of the transmitter filter. A discriminator (208) is coupled to the selectivity filter for converting received symbols from the frequency domain to the time domain symbols. A symbol recovery processor (210) is coupled to the discriminator for recovering the symbols through a two-state maximum likelihood sequence estimation (MLSE) technique in which templates are optimized with a BT substantially less than the BT of the transmitter filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.