Tap-weight controller for adaptive matched filter receiver
US5353306A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1992 |
| Grant date | Oct 4, 1994 |
| Priority date | — |
| Expiry date | Dec 28, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/123
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In an adaptive matched filter with a decision feedback equalizer (DFE), a tap-weight controller of the matched filter includes a tapped delay line having a series of delay elements for receiving an incoming digital signal to produce successively delayed signals at successive taps of the delay line so that the signal at the center tap coincides with an output of the DFE. Cross-correlators are associated respectively with tap-weight multipliers of the matched filter. In each cross-correlator, cross-correlation is detected between a digital sample from the DFE and a delayed version of the corresponding digital sample. An average value is taken of the cross-correlation to produce higher significant bits of a tap-weight coefficient for the corresponding tap-weight multiplier. The most significant bit of the output of the higher significant bits is inverted and a group of bits is produced, each having the same binary value as the inverted most significant bit. The group of bits is supplied to the corresponding tap-weight multiplier as lower significant bits of the tap-weight coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.