Effects of Multipath on OFDM Systems for Indoor Broadband Power-Line Communication Networks
2009 (English)In: IEEE Transactions on Power Delivery, ISSN 0885-8977, E-ISSN 0885-8877, Vol. 24, no 3, 1190-1197 p.Article in journal (Refereed) Published
Power-line networks are an excellent infrastructure for broadband data transmission. However, various multipaths within a broadband power-line communication (BPLC) system exist due to stochastic changes in the network load impedances, branches, etc. This further affects network performance. This paper attempts to investigate the performance of indoor channels of a BPLC system that uses orthogonal frequency-division multiplexing (OFDM) techniques. It is observed that when a branch is added in the link between the sending and receiving end of an indoor channel, an average of 4-dB power loss is found. Additionally, when the terminal impedances of the branch change from the line characteristic impedance to impedance of lower values, the power loss (signal-to-noise ratio) is about 0.67 dB/Omega. On the contrary, for every increase in the terminal impedances by 100 Omega, above the line characteristic impedance, the power loss is 0.1. dB/Omega. When the line terminal impedances are close to short or open circuits, OFDM techniques show degraded performance. This situation is also observed when the number of branches increases. In this paper, it is shown that to overcome such performance degradation, the concatenated Reed-Solomon codes/interleaved Viterbi methods can be used. The observations presented in the paper could be useful for an efficient design of a BPLC system that uses OFDM techniques.
Place, publisher, year, edition, pages
2009. Vol. 24, no 3, 1190-1197 p.
Branched network, broadband power-line communication (BPLC), communication channel model, concatenated coding, convolutional codes, impulsive noise, interleaving, orthogonal frequency-division multiplexing (OFDM), Reed-Solomon codes
Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-32288DOI: 10.1109/TPWRD.2009.2014281ISI: 000267765100026ScopusID: 2-s2.0-67650672498OAI: oai:DiVA.org:kth-32288DiVA: diva2:409956
QC 201104122011-04-122011-04-112011-04-12Bibliographically approved