Performance comparison of Modified BPSK-OFDM and QFSK-OFDM in PLC Channel noise

Authors

  • Abiola G Bolaji Department of Electrical and Electronic Engineering Science, University of Johannesburg, P.O. Box 524, Auckland Park, 2006, Johannesburg, South Africa.
  • Thokozani Shongwe Department of Electrical and Electronic Engineering Technology, University of Johannesburg, P.O. Box 17011, Doornfontein, 2028. Johannesburg, South Africa

Abstract

The article describes and compares two OFDM
based communications schemes for reducing the effects of the
combination of Narrowband Interference (NBI) and Impulsive
Noise (IN), which are noise types typical in Power Line Communication
(PLC). The two schemes are Modified BPSK-OFDM
(called MBPSK, for brevity) and QFSK-OFDM (called QFSK,
for brevity), which are non-conventional OFDM schemes. We
give a description of the two schemes, showing how they are
derived and also show their similarities and eventually compare
their performances. Performance simulation results, in terms
of bit error rate, are given to compare the systems under the
effect of IN and NBI. The popular Middleton Class A model
is used for modelling IN. The results show that MBPSK scheme
outperforms the QFSK scheme in terms of minimum distance,
and hence in terms of bit error probability when no preprocessing
is performed. However, under clipping/nulling, both schemes
eventually reach the bit error rate floor.

Author Biography

Thokozani Shongwe, Department of Electrical and Electronic Engineering Technology, University of Johannesburg, P.O. Box 17011, Doornfontein, 2028. Johannesburg, South Africa

THOKOZANI SHONGWE received the B. Eng degree in Electroinc engineering from the University of Swaziland, Swaziland, in 2004 and the M.Eng degree in Telecommunications Engineering from the University of the Witwatersrand, South Africa, in 2006 and the D. Eng degree from the University of Johannesburg, South Africa, in 2014. He is currently an Associate Professor at the University of Johannesburg, department of electrical and electronic engineering Technology. He is a recipient of the 2014 University of Johannesburg Global Excellence Stature (GES) award, which was awarded to him to carry out his postdoctoral research at the University of Johannesburg. In 2016, Prof T. Shongwe was a recipient of the TWAS-DFG Cooperation Visits Programme funding to do research in Germany.


Other awards that he has received in the past are: the post-graduate merit award scholarship to pursue his master’s degree at the University of the Witwatersrand in 2005, which is awarded on a merit basis; In the year 2012, Prof. Shongwe (and his co-authors) received an award of the best student paper at the IEEE ISPLC 2012 (power line communications conference) in Beijing, China. Prof T. Shongwe’s research fields are in Digital Communications and Error Correcting Coding. His research interests are in power-line communications; cognitive radio; smart grid; visible light communications.

References

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Published

2024-04-19

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ARTICLES / PAPERS / General