A broadband power-line communication system design scheme for typical Tanzanian low-voltage network
2009 (English)In: IEEE Transactions on Power Delivery, ISSN 0885-8977, E-ISSN 1937-4208, Vol. 24, no 3, 1218-1224 p.Article in journal (Refereed) Published
Information and communications technologies (ICTs) are gaining importance in developing countries. Power-line network is a potential infrastructure for ICT services provision. Power-lines are highly interconnected network with stochastic variation in number of branches. Under such distributed network conditions the design of a broadband power-line communication (BPLC) system is a challenge. In this paper a case study of an actual power-line network, representative of a low-voltage BPLC channel in Dar es Salaam, Tanzania is considered. We shall investigate the performance of such a low-voltage channel that uses orthogonal frequency division multiplexing (OFDM) technique with binary phase shift keying (BPSK) modulation scheme for communication. For sensitivity analysis, three different transmitter locations were chosen and receiver points were varied to identify the possible degraded performance scenarios. Analysis show that in the frequency bands of 100 MHz, the channel delay spread for such networks is about 4 s, giving a maximum number of subchannels 4096 with 512 cyclic prefix. To improve the degraded performance scenarios, the concatenated Reed Solomon outer code with punctured convolution inner code was applied to the network. It was found that when the branches were terminated by its corresponding characteristic impedances the performance is improved by 10-20 dB compared to a corresponding uncoded system. On the contrary for a coded system when the branches were terminated either in low or higher impedances compared to branch characteristic impedances the improvement was greater than 2-15 dB. This study demonstrates that the specification proposed by IEEE-802.16 broadband wireless access working groups can be used for performance improvement of distributed low-voltage systems.
Place, publisher, year, edition, pages
USA: IEEE , 2009. Vol. 24, no 3, 1218-1224 p.
broadband networks, carrier transmission on power lines, channel coding, concatenated codes, convolutional codes, modulation coding, OFDM modulation, phase shift keying, radio access networks, Reed-Solomon codes, wireless channels
Engineering and Technology
IdentifiersURN: urn:nbn:se:uu:diva-113132DOI: 10.1109/TPWRD.2009.2014478ISI: 000267765100029ISBN: 0885-8977OAI: oai:DiVA.org:uu-113132DiVA: diva2:289929
10731611 broadband power-line communication system design Tanzanian low-voltage network orthogonal frequency division multiplexing OFDM technique binary phase shift keying BPSK modulation scheme sensitivity analysis channel delay spread concatenated Reed Solomon outer code punctured convolution inner code characteristic impedance IEEE-802.16 broadband wireless access network2010-01-252010-01-252016-04-07Bibliographically approved