摘要 |
<p>A multi-carrier transmission system using DMT. It is known to recover a receiver sample and 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 an FFT processor. A complex number representing the pilot carrier is then available from the FFT processor output. If an 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 synchronization is handled separately from sampling clock synchronization, although the two processes are intimately related and frame synchronization must be acquired before sampling clock synchronization.</p> |
申请人 |
TELIA AB (PUBL) |
发明人 |
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-AKE;BENGTSSON, DANIEL;HAKANSSON, SIWERT;WEN, YE |