Mitigation of Periodic Impulsive Noise in OFDM-Based Power-Line Communications

Ren, Gaofeng; Qiao, Shushan; Zhao, H. S.; Li, Chunyang; Hei, Yong

doi:10.1109/tpwrd.2012.2230651

Cited by 23 publications

(12 citation statements)

References 23 publications

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“…In the above analysis, when c  is a decimal number or it is too small, every noise symbol received by FFT of the receiver is an incomplete cycle of the noise so that the FFT output data of the noise symbols doesn't completely satisfy the Eq. [9][10][11], the proposed method can be realized in a more flexible way. It can select the specific sub-channels in the OFDM system to use the serial IFFT/FFT.…”

Section: Principle Of the Proposed Methodsmentioning

confidence: 99%

“…In addition, non-Gaussian noise is probably introduced to the OFDM system under the strong interference or with the devices of poor quality. At present, many methods to mitigate periodic impulsive noise in OFDM system have been proposed [9][10][11]. However, most of the methods need multiple steps or loop operation, which can increase the system complexity obviously.…”

Section: Introductionmentioning

confidence: 99%

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A serial IFFT precoding scheme to mitigate the periodic noise in OFDM system

Deng

Chen

et al. 2016

IEEE Commun. Lett.

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In this letter, we propose a serial IFFT precoding method to mitigate the periodic noise in orthogonal frequency division multiplexing (OFDM) system. The principle of the method is given. And the feasibility is proved theoretically. In addition, in a single light emitting diode (LED) based visible light communication (VLC) OFDM experimental system with periodic noise, a comparison between the system performances of the two schemes with and without the method is made. The experiment results show that the proposed method can be used to improve the system performance effectively.Index Terms-Orthogonal frequency division multiplexing (OFDM), digital signal processing, periodic noise, serial IFFT precoding

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Section: Principle Of the Proposed Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A serial IFFT precoding scheme to mitigate the periodic noise in OFDM system

Deng

Chen

et al. 2016

IEEE Commun. Lett.

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“…Recently, PLC is gaining an increased attention for data transmission in smart grids, in-home networking and many other applications [3,4]. However, the electrical power lines were originally designed for power delivery rather than data transmission, so they are more challenging compared to other communication media [5]. The dominant challenges in the PLC are attenuation, multiple access (MA) interference, frequency selective fading and time-dependent impulsive noise [6].…”

Section: Introductionmentioning

confidence: 99%

“…The dominant challenges in the PLC are attenuation, multiple access (MA) interference, frequency selective fading and time-dependent impulsive noise [6]. A major damage to a signal propagating over the PLC channel is caused by the errors introduced by the short-duration and high-amplitude impulsive noise [5]. The influence of impulsive noise can be suppressed using the forward error correction coding schemes [5].…”

Section: Introductionmentioning

confidence: 99%

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Image transmission using unequal error protected multi‐fold turbo codes over a two‐user power‐line binary adder channel

Khalid

Khan

Adebisi

et al. 2015

IET Image Processing

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Impulsive noise is one of the major challenges for reliable transmission over power lines. Interleavers provide higher protection against the impulsive noise by dispersing information across the channel and spreading the burst of errors over multiple codewords. Multi-fold turbo (MFT) coding is a technique that improves the communication reliability using multiple interleavers. In the MFT codes, each data subsequence is equally protected. For applications in which data constitute information with various levels of importance, it is intuitive to offer the more important subsequence, a stronger protection. A modified form of the MFT codes capable of providing unequal error protection over a two-user power-line binary adder channel is proposed here. As a benchmark, two test images are transmitted across the channel. The trellis-based iterative algorithm is modified for the twouser scenario to decode the received signal. The simulation results show a gain of 1.5 dB for the modified MFT code over the conventional turbo codes for each of the transmitted images. A gain of 2 dB is also recorded for the most protected component of each image over the least protected components.

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Research on the memory order of the power‐line communication channel

Zhai

2014

Int J Communication

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As a memory channel, power-line communication (PLC) channel can be modeled by the finite states Morkov model. The memory order in an finite states Morkov model is a key parameter, which is not solved in PLC systems yet. In the paper, the mutual information is used as a measure of the dependence between the different symbols, treated as the received scalar network analyzer, or amplitude of the current channel symbol or that of previous symbols. The joint distribution probabilities of the envelopes in PLC systems are computed based on the multi-path channel model, which is commonly used in PLC. With the first-order Markovian assumption, we confirm that given the information of the symbol immediately preceding the current one, any other previous symbol is independent of the current one in PLC systems. The field test is also performed to model the received OFDM signals with the help of autoregressive model. The results show that the firstorder autoregressive model is enough to model the fading channel in PLC systems, which means the amount of uncertainty remaining in the current symbol should be negligible, given the information corresponding to the immediately preceding one. POWERLINCE COMMUNICATIONS FIRST-ORDER MARKOV CHANNELS 1069 noisy communications channel, which isn't favorable for the high-frequency communications signal transmission with frequency ranging 0 -30 MHz [7].Because of its ubiquity of already existing electrical power delivery networks, PLC is susceptible to numerous appliances and power networks [8]. Several studies have shown that the PLC channel is impaired by different types of noise, which are mostly produced by the electrical appliances in the networks [9]. The isolator switching or breaker in the grids can cause impulse noise [10]: The broadcast transmitters operating at frequencies higher than a few hundred kilohertz, can ingress the narrow band noise, mostly amplitude modulated sinusoidal signals [11,12]; The switching actions of silicon-controlled rectifier diodes found in many electrical appliances, brush motors, dimmer switches, and industrial sources directly connected to the supply network can cause periodic impulsive noise synchronous to the mains frequency [13]; The switched-mode power supplies can result periodic impulsive noise asynchronous to the mains frequency, with a short duration, random occurrence, and a high-power spectral density [14]; Switching transients in the power network can cause asynchronous impulsive noise.Because the impulsive noise is actually produced by appliances in the power network, the powerline noise can also be regarded as a combined sum of the background noise and the impulsive noises from all nearby appliances [15]. In addition to the behaviors of appliances, channel characteristics between the noise sources and a receiver may vary synchronously to the mains voltage [16]. This channel fluctuation also causes the periodic features of the noise [17]. As a result, PLC channels can be seen as typical noisy channels.Like other noisy channels, the PLC chan...

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Mitigation of Periodic Impulsive Noise in OFDM-Based Power-Line Communications

Cited by 23 publications

References 23 publications

A serial IFFT precoding scheme to mitigate the periodic noise in OFDM system

A serial IFFT precoding scheme to mitigate the periodic noise in OFDM system

Image transmission using unequal error protected multi‐fold turbo codes over a two‐user power‐line binary adder channel

Research on the memory order of the power‐line communication channel

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