Computer based simulation model realization of OFDM communication over power lines

Bogdanović, Mario

doi:10.1109/telfor.2012.6419193

Cited by 5 publications

(4 citation statements)

References 7 publications

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“…The input bit stream is randomly generated at the transmitted end. Error detection and correction techniques are essential for reliable communication over noisy channel [8]. Convolution coding is used for coding the input bit stream.…”

Section: Simulation Resultsmentioning

confidence: 99%

Periodic Impulsive Noise Reduction in Ofdm Based Power Line Communication

Mathew¹,

Murukan²

2014

IJRET

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Different communication technologies are used for the transmission of information such as wireless communication, satellite communication etc. Power Line Communication (PLC) is one of the technologies using existing power cables for the transmission of information. Power cables are not designed for data transmission. So the PLC environment contains different types of noise. This paper presents a novel approach for removing periodic impulsive noise from OFDM based power line communication system. The noise is detected using periodic impulsive noise detection algorithm and the noise is filtered by using adaptive notch filter. An adaptive filter using LMS algorithm is also designed to suppress periodic impulsive noise. Then compare the Bit Error Rate (BER) of PLC system without noise filtering, with noise filtering using notch filter and with noise filtering using adaptive filtering based on LMS algorithm. Results show that the received data is same as that of input data which is transmitted. Simulation results shows that PLC system after noise filtering gives better results than PLC system without noise filtering.

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Section: Simulation Resultsmentioning

confidence: 99%

Periodic Impulsive Noise Reduction in Ofdm Based Power Line Communication

Mathew¹,

Murukan²

2014

IJRET

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“…Those two noises are caused by a superposition of multiple sources of noise [7]) with low power and broadcasting in short, middle and long wave ranges, respectively [8]. Given results obtained from measurements in the office building in Osijek city center are statistically processed.…”

Section: Non-periodic Impulsive Noisementioning

confidence: 99%

“…After training sequence conventional comb-type LS estimator with interpolation is used (either spline cubic or linear) according to (8) and the result is H CT transfer function that contours current state of the channel, especially noise condition. The proposed solution uses simple mean value between above defined two transfer functions to improve the stored H BT by momentary obtained H CT :…”

Section: Figure 5 Proposed Pilot Arrangementmentioning

confidence: 99%

Frequency domain based LS channel estimation in OFDM based Power line communications

Bogdanović¹

2014

Automatika

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Original scientific paperThis paper is focused on low voltage power line communication (PLC) realization with an emphasis on channel estimation techniques. The Orthogonal Frequency Division Multiplexing (OFDM) scheme is preferred technology in PLC systems because of its effective combat with frequency selective fading properties of PLC channel. As the channel estimation is one of the crucial problems in OFDM based PLC system because of a problematic area of PLC signal attenuation and interference, the improved LS estimation technique is proposed. We investigate and evaluate proposed frequency domain LS channel estimation method for OFDM based power line communication system. Also performance comparing with existing pilot based estimation algorithms towards proposed method in terms of their computational complexity, error correction, and suitability conditions is made.Key words: Power Line Communication, OFDM, Channel Estimation, Least Squares estimation, Linear Minimum Mean-square Error estimation LS estimacija kanala u frekvencijskoj domeni u OFDM baziranim komunikacijama preko strujnih vodova. Ovaj rad je fokusiran na realizaciju komunikacije preko vodova niskonaponske mreže s naglaskom na tehnike procjene prijenosnog kanala. OFDM schema je preferirana prijenosna tehnologija u PLC sustavima zbog svoje učinkovitosti u borbi s osobinom selektivnog frekvencijskog iščezavanja signala kod PLC kanala. Kako je procjena kanala jedan od najvažnijih problema u OFDM baziranom PLC sustavu zbog problematičnog područja gušenja i interferencije PLC signala, predstavljena je poboljšana tehnika LS procjene kanala. Istražili smo te evaluirali predstavljenu metodu LS procjene kanala u frekvencijskoj domeni za PLC sustave bazirane na OFDM modulacijskoj tehnici. Takoder je napravljena usporedba karakteristika predložene metode s poznatim algoritmima procjene kanala uz pomoć znanih simbola (pilota) u području njihove računalne složenosti, ispravljanja grešaka te uvjetima prilagodavanja.Ključne riječi: komunikacija strujnim vodovima, OFDM, procjena prijenosnog kanala, procjena metodom najmanjih kvadrata, procjena metodom linearne srednje kvadratne pogreške

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“…Powerline communications (PLC) [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] has been widely noted recently. The advantage of PLC is that power lines have been deployed well in advance.…”

Section: Introductionmentioning

confidence: 99%

Distributed space‐time block codes with embedded adaptive AAF/DAF elements and opportunistic listening for multihop power line communication networks

Tseng

Lee

et al. 2015

Int J Communication

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SUMMARYWe consider the multihop power line communication (PLC) networks of one source, two repeaters, and one destination. In the previous scheme, when the repeaters receive the retransmission data from the source, they use the traditional distributed space-time block code (DSTBC) with all decode-and-forward (DAF) elements to transmit the data, and they do not consider the incorrect decoding. The original contribution is that we propose a novel DSTBC scheme with embedded adaptive DAF/amplify-and-forward (AAF) elements for data retransmission in multihop PLC networks with existing opportunistic listening (OL) protocols. The new scheme has two types (instead of only one type as in the previous scheme), and, in the second type, the coding matrix for data retransmission can use either all DAF elements or hybrid AAF/DAF elements depending on the correctness of OL results. The advantage is to avoid a loss of diversity because of incorrectly received data at the relays. The effectiveness of the proposed scheme is shown in the simulation results. For the impulsive noise parameter δ = 0.8 and worst case background noise (narrowband interference and colored noise) at bit error rate 10 À3 , our proposed system has 1 dB gain over the previous scheme with the traditional DSTBC with all DAF elements.

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Computer based simulation model realization of OFDM communication over power lines

Cited by 5 publications

References 7 publications

Periodic Impulsive Noise Reduction in Ofdm Based Power Line Communication

Periodic Impulsive Noise Reduction in Ofdm Based Power Line Communication

Frequency domain based LS channel estimation in OFDM based Power line communications

Distributed space‐time block codes with embedded adaptive AAF/DAF elements and opportunistic listening for multihop power line communication networks

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