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Power Efficiency Improvement in CE-OFDM System With 0 dB IBO for Transmission over PLC Network
Mohammed El Ghzaoui, Belkadid Jamal, Benbassou Ali, EL Bekkali Moulhim
Pages - 110 - 119     |    Revised - 01-07-2011     |    Published - 05-08-2011
Volume - 5   Issue - 3    |    Publication Date - July / August 2011  Table of Contents
Orthogonal frequency division multiplexing (OFDM) OFDM has been adopted for high speed data transmission of multimedia traffic such as HomePlug A/V and Mobile WiMax. However, OFDM also has a drawback of a high PAPR (peak-to-average-power-ratio). Due to this high PAPR amplifier usually does not act in dynamic range. One potential solution for reducing the peak-to-average power ratio (PAPR) in an OFDM system is to utilize a constant envelope OFDM (CE-OFDM) system. Furthermore, by utilizing continuous phase modulation (CPM) in a CE-OFDM system, the PAPR can be effectively reduced to 0 dB, allowing for the signal to be amplified with a power efficient non-linear power amplifier with Input Back-Off (IBO) of 0 dB. This paper describes a CE-OFDM based modem for Power Line Communications (PLC) over the low voltage distribution network. Relying on a preliminary characterization of a PLC network, a complete description of the modem is given. Also CE-OFDM is compared with conventional OFDM under HomePlug 1.0 in the presence of power amplifier nonlinearities, considering different values of IBO.
CITED BY (1)  
1 Belkadid, J., Benbassou, A., El Ghzaoui, M., & Liakouti, A. Action of EM Disturbances on the Availability and Range of Indoor PLC Transmitters and Impact of Radiation on the Environment around Channel.
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Mr. Mohammed El Ghzaoui
EST - Morocco
Professor Belkadid Jamal
EST - Morocco
Mr. Benbassou Ali
- Morocco
Mr. EL Bekkali Moulhim
- Morocco

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