公开(公告)号：WO1998010546A2

公开(公告)日：1998-03-12

申请号：PCT/SE1997001451

申请日：1997-09-01

Applicant: TELIA AB (publ) ,  ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  TONVALL, Harry ,  OLSSON, Lennart ,  STEFANSSON, Thomas ,  ÖHMAN, Hans ,  BAHLENBERG, Gunnar ,  ISAKSSON, Anders ,  ÖKVIST, Göran ,  LJUNGGREN, Lis-Marie ,  NORDSTRÖM, Tomas ,  ISAKSSON, Lars-Åke ,  BENGTSSON, Daniel ,  HÅKANSSON, Siwert ,  WEN, Ye

Inventor： TELIA AB (publ)

IPC: H04L05/06

CPC classification number: H04L27/2614 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

Abstract: In multi-carrier transmission systems using, for example, DMT, it is known to recover a receiver sampling clock from a reserved carrier, a pilot carrier, having a fixed phase. A sampling clock oscillator in a receiver is then phase-locked to the pilot carrier. Multi-carrier receivers, such as DMT receivers, are normally equipped with a FFT processor. A complex number representing the pilot carrier is then available from the FFT processor output. If a FFT processor is not available, a one-frequency DFT processor can be provided to produce a complex estimate of the pilot carrier. In a DMT system, frame synchronisation is handled separately from sampling clock synchronisation, although the two processes are intimately related and frame synchronisation must be acquired before sampling clock synchronisation.

Abstract translation: 在使用例如DMT的多载波传输系统中，已知从具有固定相位的保留载波，导频载波恢复接收机采样时钟。 接收机中的采样时钟振荡器然后被锁相到导频载波。 多载波接收机，如DMT接收机，通常配有FFT处理器。 然后可以从FFT处理器输出获得表示导频载波的复数。 如果FFT处理器不可用，则可以提供单频DFT处理器以产生导频载波的复杂估计。 在DMT系统中，帧同步与采样时钟同步分开处理，尽管两个过程密切相关，而在采样时钟同步之前必须获取帧同步。

公开(公告)号：WO9810546A3

公开(公告)日：1998-06-04

申请号：PCT/SE9701451

申请日：1997-09-01

Applicant: TELIA AB ,  ISAKSSON MIKAEL ,  JOHANSSON MAGNUS ,  TONVALL HARRY ,  OLSSON LENNART ,  STEFANSSON THOMAS ,  OEHMAN HANS ,  BAHLENBERG GUNNAR ,  ISAKSSON ANDERS ,  OEKVIST GOERAN ,  LJUNGGREN LIS MARIE ,  NORDSTROEM TOMAS ,  ISAKSSON LARS AAKE ,  BENGTSSON DANIEL ,  HAAKANSSON SIWERT ,  WEN YE

Inventor： ISAKSSON MIKAEL ,  JOHANSSON MAGNUS ,  TONVALL HARRY ,  OLSSON LENNART ,  STEFANSSON THOMAS ,  OEHMAN HANS ,  BAHLENBERG GUNNAR ,  ISAKSSON ANDERS ,  OEKVIST GOERAN ,  LJUNGGREN LIS-MARIE ,  NORDSTROEM TOMAS ,  ISAKSSON LARS-AAKE ,  BENGTSSON DANIEL ,  HAAKANSSON SIWERT ,  WEN YE

IPC: H04J11/00 ,  H04B3/10 ,  H04L1/00 ,  H04L7/00 ,  H04L27/26 ,  H04L5/06

CPC classification number: H04L27/2614 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

Abstract: In multi-carrier transmission systems using, for example, DMT, it is known to recover a receiver sampling clock from a reserved carrier, a pilot carrier, having a fixed phase. A sampling clock oscillator in a receiver is then phase-locked to the pilot carrier. Multi-carrier receivers, such as DMT receivers, are normally equipped with a FFT processor. A complex number representing the pilot carrier is then available from the FFT processor output. If a FFT processor is not available, a one-frequency DFT processor can be provided to produce a complex estimate of the pilot carrier. In a DMT system, frame synchronisation is handled separately from sampling clock synchronisation, although the two processes are intimately related and frame synchronisation must be acquired before sampling clock synchronisation.

Abstract translation: 在使用例如DMT的多载波传输系统中，已知从具有固定相位的保留载波，导频载波恢复接收器采样时钟。 接收器中的采样时钟振荡器然后被锁相到导频载波。 多载波接收机，例如DMT接收机，通常配备有FFT处理器。 然后可以从FFT处理器输出获得表示导频载波的复数。 如果FFT处理器不可用，则可以提供单频DFT处理器来产生导频载波的复杂估计。 在DMT系统中，帧同步与采样时钟同步是分开处理的，虽然这两个过程密切相关，并且在采样时钟同步之前必须获取帧同步。