Impulsive noise estimation and suppression in OFDM systems over in‐home power line channels

Ahadiat, Mohammad Reza; Azmi, Paeiz; Haghbin, Afrooz

doi:10.1002/dac.2831

Cited by 10 publications

(9 citation statements)

References 23 publications

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“…Conventional approaches for impulsive noise cancellation in PLC channel are generally based on time-domain treatment [18,19], in which case the noise impulses can be deleted using nonlinear techniques such as clipping, blanking or clipping/blanking [20]. The performance of these techniques cannot be appreciated since they give poor communication performance.…”

Section: Related Workmentioning

confidence: 99%

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OFDM-based power-line communication enhancement using a turbo coded adaptive impulsive noise compensator

Himeur

Boukabou

2015

Telecommun Syst

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In this paper, we propose a novel estimation and decoding scheme for power-line communication (PLC) systems in impulsive noise environments. The proposed scheme is based on the turbo coding combined with adaptive noise compensation to reduce burst errors and multipath effects. For this purpose, the PLC channel and noise models are introduced, then, the turbo encoder/decoder are inserted in the mapper/demapper and the pilot insertion block for the sake of enhancing preliminary estimation of the transmitted orthogonal frequency division multiplexing signals. The proposed impulsive noise compensator is based on the estimation of the impulse bursts using a new blanking/clipping function, and on the estimation of the signal to impulse noise ratio and the peak to average power ratio. Simulation results illustrate that receivers with combined turbo coding and the proposed noise compensator drastically outperform existing receivers under impulsive noise. In comparison to some existing schemes, the proposed scheme reaches its perfect performance in a reduced 15-paths environment, when the bit error rate and mean square error performance are tested. The improvements in SNR performance are more than 16 dB for BPSK modulation and can reach 12-20 dB for 16-QAM modulation, when a high impulsive noise level is considered.

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Section: Related Workmentioning

confidence: 99%

“…Two major impairments to the PLC systems are due to multipath propagation accompanied and impulsive noise [2,3]. Multipath propagation is characterized by both slow fading and uncorrelated Rayleigh/Ricean fading scenarios [4]. Impulsive noise is characterized by asynchronous or cyclo-stationnary scenarios.…”

Section: Introductionmentioning

confidence: 99%

OFDM-based power-line communication enhancement using a turbo coded adaptive impulsive noise compensator

Himeur

Boukabou

2015

Telecommun Syst

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“…where C(x) is the coding matrix we will propose in (13), h RiD is the channel coefficient between the ith repeater and the destination from h(f) in (5), w D A and w D B are the impulsive noise, and η D A and η D B are the background noise in the first and second time slot at the destination, respectively. The coding matrix is as follows:…”

Section: A First Typementioning

confidence: 99%

“…where y r A and y r B , h RiD , w D A and w D B , and η D A , η D B are defined in (12), and C(x) is the coding matrix in (13) or (19) we will propose in the succeeding paragraphs. Through the OL, R 2 receives the data as shown in Figure 4 (R 1 transmits the data to R 2 ).…”

Section: B Second Type (Original Contribution)mentioning

confidence: 99%

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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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Mitigating cyclostationary noise using multi‐fold turbo codes on a two‐user narrowband power‐line binary adder channel

Khalid

Adebisi

Shan³

et al. 2020

Int J Communication

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SummaryPower lines present a more challenging communication environment compared to other media. Impedance mismatches and network branches render the channel frequency‐selective, leading to strong inter‐symbol interference (ISI). Moreover, devices connected to the power grid introduce impulsive noise on the network. Such factors may degrade the system performance drastically. Therefore, robust coding and modulation schemes are required to increase the communication reliability. Furthermore, multiple access communication allows many users to share a common medium to enhance the systems' throughput. This paper examines the behaviour of two schemes, turbo codes and multi‐fold turbo codes, against a two‐user adder channel under power‐line conditions operating below 500 kHz. Both schemes employ distinct codes for each user and make use of orthogonal frequency‐division multiplexing (OFDM) to cope with the ISI. Three configurations of a low‐voltage (LV) power‐line outdoor network are considered. Results obtained through simulations show that a gain, up to 3 dB, can be obtained for both users using the multi‐fold turbo coding over the conventional turbo coding. The effect of iterative decoding on the performance of both schemes is also reported.

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Impulsive noise estimation and suppression in OFDM systems over in‐home power line channels

Cited by 10 publications

References 23 publications

OFDM-based power-line communication enhancement using a turbo coded adaptive impulsive noise compensator

OFDM-based power-line communication enhancement using a turbo coded adaptive impulsive noise compensator

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

Mitigating cyclostationary noise using multi‐fold turbo codes on a two‐user narrowband power‐line binary adder channel

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