Abstract
Power line communication (PLC) has made remarkable strides to become a key enabler of smart grid and its applications. Existing PLC systems are based on orthogonal frequency division multiplexing (OFDM), which has a high peak-to-average power ratio (PAPR). This paper presents vector OFDM (VOFDM) with advanced signal processing at the receiver to improve the energy efficiency of the PLC system. Results show that, due to its low PAPR properties, VOFDM is less sensitive to impulsive noise and provides a reduction of 5.8 dB in transmit power requirement relative to conventional OFDM. Furthermore, unlike the existing impulsive noise cancellation methods, the adopted signal processing technique also improves the SNR at the receiver by 2.1 dB, which further reduces the power requirement of the PLC transceiver. Together, these can simplify design, reduce cost, and improve energy efficiency of future PLC transceivers.
Highlights
The energy industry is in the centre of unprecedented transformation
dynamic peakbased threshold estimation (DPTE) relies on the premise that if vector OFDM (VOFDM) symbol peaks measured at the transmitter are correctly received by the blanker, output signal-to-noise ratio (SNR) can be significantly improved without regard to the short term variation in impulsive noise characteristics, a major weakness of conventional optimal blanking (COB) [23]
This result demonstrates that if a certain quadrature amplitude modulation (QAM) modulated symbol sequence of length N signal is blanked using the DPTE technique, even with orthogonal frequency division multiplexing (OFDM) and 16 VBs, the output SNR can be improved by 1.1 dB in each case relative to COB
Summary
The energy industry is in the centre of unprecedented transformation. As the smart grid evolves and the number of interconnected devices rises, energy efficiency of the enabling communication systems has become a topical issue. The benefits of low PAPR in PLC systems design include the use of inexpensive, non-linear power amplifiers as well as energy-efficient transmission. This paper exploits the lower PAPR property of VOFDM for more efficient cancellation of impulsive noise at the receiver in order to improve the energy efficiency of PLC systems. DPTE relies on the premise that if VOFDM symbol peaks measured at the transmitter are correctly received by the blanker, output SNR can be significantly improved without regard to the short term variation in impulsive noise characteristics, a major weakness of conventional optimal blanking (COB) [23]. The idea of combining VOFDM with DPTE in this paper is that together, they can significantly improve energy efficiency of the PLC systems. The VOFDM-DPTE method can simplify design, reduce cost, improve energy efficiency and electromagnetic conformance of PLC transceivers.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
