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Link-Adaptive Physical Layer for Indoor Broadband Power-Line Communications

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1 Author(s)
Byung-Seo Kim ; Dept. of Comput. & Inf. Commun. Eng., Hongik Univ., Jochiwon

Increasing interest in smart home automation systems or home networks has driven the use of low-voltage power lines as a high-speed data channel. Since this type of power line is not designed for communication purposes, the channel exhibits unfavorable transmission properties. In this paper, a novel orthogonal frequency-division multiplexing-based physical-layer architecture for indoor broadband power-line communications is proposed. For the design of the layer, a new constellation for bit-mapping (or modulation) is introduced to increase the transmission rate over a sudden phase-shift-prone channel. In addition, a simple bit-loading scheme is adopted and a new preamble for a packet-based power-line communication system is proposed. The proposed layer is implemented as a type of testbed, and is field-tested in labs and in residential homes. The test results demonstrate that the proposed system has good channel adaptivity and achieves high transmission rates.

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Power Delivery, IEEE Transactions on  (Volume:24 ,  Issue: 1 )