Digital RFI Suppression in DMT-based VDSL Systems

Validerad; 2004; 20110520 (ricnil)
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.

TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Signalbehandling hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Signal Processing hsv//eng
TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik hsv//swe
ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
Bit rate
DSL
Discrete Fourier transforms
Filter bank
Frequency
Narrowband
OFDM modulation
Radiofrequency interference
Wire
Telecommunication standards
Signalbehandling
Signal Processing
subscriber loops
discrete multitone (DMT)
radio frequency interference (RFI)
very high bit rate digital subscriber line (VDSL)

Nilsson, RickardLuleå tekniska universitet,Signaler och system(Swepub:ltu)ricnil (author)
Börjesson, Per OlaLund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)tde-pbo (author)
Ödling, PerLund University,Lunds universitet,Institutionen för elektro- och informationsteknik,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Electrical and Information Technology,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)tde-pod (author)
Wiese, Brian (author)
Bingham, John A. C. (author)
Luleå tekniska universitetSignaler och system (creator_code:org_t)

In:IEEE Transactions on Circuits and Systems Part 151:11, s. 2300-23121549-83281558-0806
In:IEEE Transactions on Circuits and Systems Part 1: Fundamental Theory and Applications51:11, s. 2300-23121057-7122

By the author/editor: Sjöberg, Frank; Nilsson, Rickard; Börjesson, Per O ...; Ödling, Per; Wiese, Brian; Bingham, John A. ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Signal Processin ...

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