Digital RFI suppression in DMT-based VDSL systems
Author
Summary, in English
In this paper, we propose a method for suppressing radio frequency interference (RFI) in discrete multitone (DMT) based very high bit rate digital subscriber line (VDSL) systems. The method operates in the frequency domain of a DMT system. First, we derive a model of how an unknown narrow-band RF signal is mapped onto the DMT carriers. Then, by measuring the RFI on a few unused DMT carriers we are able to subtract RFI estimates from every modulated subcarrier. Simulation results show. that this method, applied to an RFI signal with the same average power as the VDSL signal, suppresses the RFI with 40-50 dB, which reduces the average SNR loss from about 20 to less than 0.3 dB.
Publishing year
2004
Language
English
Pages
2300-2312
Publication/Series
IEEE Transactions on Circuits and Systems Part 1: Fundamental Theory and Applications
Volume
51
Issue
11
Document type
Journal article
Publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- subscriber loops
- discrete multitone (DMT)
- radio frequency interference (RFI)
- very high bit rate digital subscriber line (VDSL)
Status
Published
ISBN/ISSN/Other
- ISSN: 1057-7122