Clustered-orthogonal frequency division multiplexing for power line communication: when is it beneficial?

2014 ◽  
Vol 8 (13) ◽  
pp. 2336-2347 ◽  
Author(s):  
Moises V. Ribeiro ◽  
Guilherme R. Colen ◽  
H. Vincent Poor ◽  
Zhi Quan ◽  
Fabricio V.P. de Campos
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Power Line ◽  
Power Line Communication ◽  
Frequency Division Multiplexing ◽  
Frequency Division

Carrier Modulation Technology Based on Orthogonal Frequency Division Multiplexing

2013 ◽  
Vol 774-776 ◽  
pp. 1671-1676
Author(s):  
Chen Wu Li ◽  
Jian Zhang ◽  
Qin Xie ◽  
Xiao Hong Zhang
Keyword(s):  
Fourier Transform ◽  
Discrete Fourier Transform ◽  
Orthogonal Frequency Division Multiplexing ◽  
Low Voltage ◽  
Power Line ◽  
Power Line Communication ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Family Network ◽  
Inverse Discrete Fourier Transform

This paper first analyzes the transmission characteristics of low-voltage power line channels with the focus on the study of carrier modulation technology regarding the power line communication part, then proposes the orthogonal frequency division multiplexing technology that serves for the digital communication of family network power line communication gateways, analyzes the OFDM system principle, actulizes OFDM modulation and demodulation through discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT), and build the OFDM simulation model. Finally, a specific plan of using power lines as the family network transmission media is proposed.

scholarly journals Diseño de estrategias de sincronización y estimación de canal para la mejora de comunicaciones en redes inteligentes de energía

2021 ◽  
Author(s):  
◽  
Martín Alejandro Colombo
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Power Line ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Power Line Communications ◽  
La Red

La presente tesis contribuye en el desarrollo de estrategias eficientes de sincronización y estimación de canal para sistemas de comunicaciones por la red eléctrica (Power-Line Communications – PLC), que utilizan modulación multiportadora por división de frecuencias ortogonales (Orthogonal Frequency Division Multiplexing – OFDM). El principal objetivo es disminuir la complejidad asociada respecto a variantes existentes en la literatura, y a su vez mantener un desempeño competitivo. Para ello, se realiza el diseño de un símbolo piloto construido a partir de pares de secuencias complementarias y se definen algoritmos de sincronización y estimación de canal. Se analizan las técnicas de sincronización gruesa por Autocorrelación (AC) y Correlación Cruzada (CC) en sistemas PLC, y se define un algoritmo de sincronización fina y estimación de canal a partir de la reutilización de la CC. La propuesta se evalúa por simulaciones estudiando el efecto en cada etapa de: el canal PLC, el ruido de fondo coloreado y las diversas fuentes de ruido impulsivo. Adicionalmente, se determina la degradación en el desempeño de cada etapa y se proponen soluciones en un escenario con restricción en la cantidad de subportadoras habilitadas para la transmisión del símbolo piloto, al aplicar una máscara espectral de compatibilidad electromagnética.

scholarly journals Wavelet OFDM for Power Line Communication

2021 ◽  
Author(s):  
Sagar C. Kar
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Impulsive Noise ◽  
Power Line ◽  
Performance Comparison ◽  
Cyclic Prefix ◽  
Power Line Communication ◽  
Frequency Division ◽  
System A ◽  
Wavelet Techniques ◽  
Efficient Transmission

Power Line Communication (PLC) system offers cheaper mode of signal communication facilities. In fast Fourier transform (FFT) based multicarrier PLC system, a cyclic prefix (CP) of the same length of the channel impulse response is added to each symbol in order to transmit data. As a result, there is always an inherent wastage of bandwidth and resources. This research presents a wavelet transform based orthogonal frequency division multiplexing (WTOFDM) approach that eliminates the need for these cyclic prefix and improves the efficiency of the PLC transmission. The presented PLC model is designed for faster and efficient transmission over the power line. The obtained results indicate that the proposed approach enhances the transmission throughput; provides better performance for impulsive noise, and increases the efficiency of the PLC system as a whole. In the end a performance comparison of different wavelet techniques have also been incorporated.

scholarly journals Wavelet OFDM for Power Line Communication

2021 ◽  
Author(s):  
Sagar C. Kar
Keyword(s):  
Orthogonal Frequency Division Multiplexing ◽  
Impulsive Noise ◽  
Power Line ◽  
Performance Comparison ◽  
Cyclic Prefix ◽  
Power Line Communication ◽  
Frequency Division ◽  
System A ◽  
Wavelet Techniques ◽  
Efficient Transmission

Power Line Communication (PLC) system offers cheaper mode of signal communication facilities. In fast Fourier transform (FFT) based multicarrier PLC system, a cyclic prefix (CP) of the same length of the channel impulse response is added to each symbol in order to transmit data. As a result, there is always an inherent wastage of bandwidth and resources. This research presents a wavelet transform based orthogonal frequency division multiplexing (WTOFDM) approach that eliminates the need for these cyclic prefix and improves the efficiency of the PLC transmission. The presented PLC model is designed for faster and efficient transmission over the power line. The obtained results indicate that the proposed approach enhances the transmission throughput; provides better performance for impulsive noise, and increases the efficiency of the PLC system as a whole. In the end a performance comparison of different wavelet techniques have also been incorporated.

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