High speed modem for a communication network

US6584147B1 · kind B1 · utility

Assignee

• IMEC · BE

Inventors

• Patrick Schaumont · Blacksburg, US
• Serge Vernalde · Leuven, BE
• Marc Engels · Wijgmaal, BE
• Willy Petrus Elisa Trog · Zwijndrecht, BE
• Karel Stefaan Martha Maria De Meyer · Brasschaat, BE
• Bart Jozef Maria De Ceulaer · Noorderwijk, BE
• Marc Moonen · Herent, BE
• Piet Vandaele · Merkem, BE

Key dates

• Filing date: Jun 19, 1998
• Grant date: Jun 24, 2003
• Expiry date: Jun 19, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L25/0228
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A receiver is disclosed at the head-end or a centralizing unit side in a communications system or network for signals in the upstream direction which is the direction from user to head-end or a centralizing unit that is linked to a number of users, the number being equal to or larger than one. The receiver is suited for the reception of burst mode signals. The receiver performs a channel estimation on a per-burst basis in real time or essentially immediate. The channel estimation is necessary to do successful data detection of modulated data. The receiver of the invention performs the channel estimation and data detection in one compact all-digital mechanism that has no tuning parts. The reception method works in an aspect according to the principle of a matched filter receiver, but stores no local copy of the required matched waveform. Rather, a copy of the matched waveform is included in the preamble of the signals.