Power Efficiency Improvement in CE-OFDM System With 0 dB IBO for Transmission over PLC Network

Signal Processing: An International Journal

Benbassou Ali¹  Belkadid Jamal¹  EL Bekkali Moulhim¹  Mohammed El Ghzaoui¹ 

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关键词: OFDM;    CE-OFDM;    CPM;    PLC;    PAPR;    BER;   

DOI  :  

学科分类：物理（综合）

来源: Computer Science Journals

【 摘 要 】

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.

【 授权许可】

Unknown