A New Approach to Peak Threshold Estimation for Impulsive Noise Reduction Over Power Line Fading Channels

Adebisi, Bamidele; Anoh, Kelvin; Rabie, Khaled M.; Ikpehai, Augustine; Fernando, Michael; Wells, Andrew T

doi:10.1109/jsyst.2018.2808230

Cited by 25 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fading channel assumes the Rayleigh distribution in which the channel state information are known at the receiver. At the receiver, we adopted MMSE equalization technique to recover the transmitted signals as shown in (24). These processes are repeated for N = 1024 and the results obtained over the Rayleigh fading channel with AWGN are reported in terms of BER in Figs.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

OFDM Systems Design Using Harmonic Wavelets

Anoh

Ikpehai

Adebisi

et al. 2019

2019 IEEE Wireless Communications and Networking Conference (WCNC)

Self Cite

View full text Add to dashboard Cite

Orthogonal frequency-division multiplexing (OFDM) is a popular multi-carrier technique used in many digital communication systems such as wireless fidelity (Wi-Fi), long term evolution (LTE) and power line communication systems. It can be designed using fast Fourier transform (FFT) or wavelet transform (WT). The major drawback in using WT is that it is computationally inefficient. In this study, we introduce a simple and computationally efficient WT, harmonic wavelet transform, for OFDM signal processing. The new WT uses the orthogonal basis functions of conventional FFT-OFDM except that it involves translation and dilation of the input signal; the new wavelets is referred to as harmonic wavelets (HW). When compared with pilot-assisted OFDM system in terms of reduction in the peak-to-average power ratio, the results show that HW-OFDM outperforms FFT-OFDM by 3 dB at 10 −4 CCDF (complementary cumulative distribution function). Over Rayleigh fading channel with additive white Gaussian noise (AWGN), the bit error ratio of both FFT-OFDM and HW-OFDM perfectly matched, showing that the proposed HW-OFDM is better in terms of peak-to-average power ratio reduction.

show abstract

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…There are different techniques in the literature for reducing the PAPR performance of OFDM systems. Examples include clipping [21], [22], companding [23], [24] and use of pilot symbols [18], [25]. In this study, pilot symbols scheme applied to reduce the PAPR in wavelet-OFDM system in [18] is adopted.…”

Section: E Pilot-assisted Ofdm From Hw-ofdm Symbolmentioning

confidence: 99%

OFDM Systems Design Using Harmonic Wavelets

Anoh

Ikpehai

Adebisi

et al. 2019

2019 IEEE Wireless Communications and Networking Conference (WCNC)

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, the power line channel has also been shown to be associated with impulsive noise [10]. Mitigation techniques exist for OFDM-based PLC techniques, including clipping [11][12] and iterative techniques [13].…”

Section: A Requirements For Robust Communication On the Lv-mv Channelmentioning

confidence: 99%

“…This means the signal is not distinguishable from the noise, so conventional threshold detection methods (e.g. those described in [11] [12]) are not applicable. Therefore, we propose setting the threshold, T , to a multiple of the measured value of the noise.…”

Section: B Enhancement For Robustness In Extremely Low Snrsmentioning

confidence: 99%

A Chirp Spread Spectrum Modulation Scheme for Robust Power Line Communication

Robson

Haddad

2022

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

This paper proposes the use of a LoRa like chirp spread spectrum physical layer as the basis for a new Power Line Communication modulation scheme suited for low-bandwidth communication. It is shown that robust communication can be established even in channels exhibiting extreme multipath interference, impulsive noise and low SNR (-40dB), with synchronisation requirements relaxed compared to conventional LoRa. ATP-EMTP simulations using frequency dependent line and transformer models, and simulations using artificial Rayleigh channels demonstrate the effectiveness of the new scheme in providing load data from LV feeders back to the MV primary substation. Our results demonstrate error-free communication at SNRs of -40dB, and can be further improved by tradingoff data rate. We further present experimental results based on a Field Programmable Gate Array hardware implementation which match the simulated performance.

show abstract

“…Consequently, the seminal work of [15] describes a general model for companding OFDM signals which involves distorting both high and low amplitude signals. Companding has been shown to possess lower in-band distortion noise than clipping [26] and can be applied in power line communication systems [27].…”

Section: A Related Work and Summary Of Main Contributionsmentioning

confidence: 99%

Enhanced Nonlinear Companding Scheme for Reducing PAPR of OFDM Systems

Adebisi

Anoh

Rabie

2019

IEEE Systems Journal

Self Cite

View full text Add to dashboard Cite

A new companding scheme for reducing the peakto-average power ratio (PAPR) of orthogonal frequency-division multiplexing (OFDM) systems is proposed in this study. It proceeds from speech signal processing similar to the earliest µlaw companding (MC) model. The proposed scheme compands (compresses and expands) the amplitudes of OFDM signals to a maximum of 1 − volt. Besides significantly reducing the PAPR, the proposed technique is also able to function as a limiter thus reducing the system complexity and limiting the amplitudes of OFDM symbols to a unity maximum voltage which does not exist in other companding PAPR techniques. Over frequencyselective fading channels with frequency domain equalization and using minimum mean square error (MMSE) to minimize the noise overhead, the proposed technique outperforms four other companding schemes over light and severe fading conditions. Lastly, we demonstrate that PAPR reduction using companding can dispense with correspondingly applying decompanding at the receiver as it amplifies the distortion noise thereby reducing the bit error ratio performance and increases the receiver complexity. We investigated the out-of-band interference of the proposed scheme and also show that it outperforms the other existing techniques by up to 5dB. Index Terms-Nonlinear companding, orthogonal frequency division multiplexing (OFDM), peak-to-average power ratio (PAPR), limiter, power amplifier (PA), out-of-band interference (OBI).

show abstract

A New Approach to Peak Threshold Estimation for Impulsive Noise Reduction Over Power Line Fading Channels

Cited by 25 publications

References 38 publications

OFDM Systems Design Using Harmonic Wavelets

OFDM Systems Design Using Harmonic Wavelets

A Chirp Spread Spectrum Modulation Scheme for Robust Power Line Communication

Enhanced Nonlinear Companding Scheme for Reducing PAPR of OFDM Systems

Contact Info

Product

Resources

About