Digital RFI Suppression in DMT-based VDSL Systems
2004 (English)In: IEEE Transactions on Circuits and Systems Part 1: Regular Papers, ISSN 1549-8328, E-ISSN 1558-0806, Vol. 51, no 11, 2300-2312 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2004. Vol. 51, no 11, 2300-2312 p.
Information technology - Telecommunication
Bit rate, DSL, Discrete Fourier transforms, Filter bank, Frequency, Narrowband, OFDM modulation, Radiofrequency interference, Wire, Telecommunication standards, Informationsteknik - Telekommunikation
Research subject Signal Processing
IdentifiersURN: urn:nbn:se:ltu:diva-6770Local ID: 510f657e-4d3f-4d90-a3a1-cba0efb24421OAI: oai:DiVA.org:ltu-6770DiVA: diva2:979656
Validerad; 2004; 20110520 (ricnil)2016-09-292016-09-29Bibliographically approved