Multi-carrier transmission systems

US6363128B1 · kind B1 · utility

Assignee

• STMICROELECTRONICS N.V. · NL

Inventors

• Mikael Isaksson · Luleå, SE
• Magnus Johansson · Luleå, SE
• Harry Tonvall · Luleå, SE
• Lennart Olsson · Luleå, SE
• Tomas Stefansson · Luleå, SE
• Hans Ohman · Luleå, SE
• Gunnar Bahlenberg · Luleå, SE
• Anders Isaksson · Luleå, SE
• Goran Okvist · Luleå, SE
• Lis-Marie Ljunggren · Luleå, SE
• Tomas Nordstrom · Luleå, SE
• Lars-Ake Isaksson · Luleå, SE
• Daniel Bengtsson · Luleå, SE
• Siwert Hakansson · Luleå, SE
• Ye Wen · Luleå, SE

Key dates

• Filing date: Jun 23, 1999
• Grant date: Mar 26, 2002
• Expiry date: Jun 23, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L27/2657
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

A multi-carrier transmission system, such as a DMT system. A receiver must be able to recover a sampling clock that is very accurately synchronized to a transmitter sampling clock. Typically, synchronization is achieved by using a reserved carrier, the pilot carrier, which is transmitted with a fixed phase. The receiver sampling clock is then phase locked to the pilot carrier. Frame timing can be recovered by using a correlation technique. Thus an improved method of recovering a sample clock and phase locking the sampling clock to a pilot carrier is provided.