Power Allocation Algorithm Based on QoS Strategy in Power-Line Communication

Abstract:

In order to maximize low power-line channel capacity within the limited transmission bandwidth, a new transmitting power allocation algorithm based on the quality of service (QoS) strategy is proposed in this paper.Orthogonal frequency-division multiplexing (OFDM) is considered to support remarkable capacity of power-line channel. In order to derive the closed form expression of the maximum channel capacity in an OFDM power communication system, the relationship between channel capacity, signal to noise ratio (SNR) and modulation scheme is analyzed.Furthermore, some influence factors of power-line channel capacity, such as branches number, branches length and end-load impendence are analyzed in this paper. Simulation result shows that the mainly factors that affect the channel capacity of low power-line are branch number and load impendence; the performance of proposed algorithm is superior to the existed water-filling algorithms at the same SNR.

• Periodical: Advanced Materials Research (Volume 981)
• Pages: 450-456
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.981.450
• Online since: July 2014
• Authors: Ke Zhou*, Ying Deng, Wei He, Xia Zhang
• Keywords: Maximum Channel Capacity, OFDM, Power-Line Channel, QoS Strategy

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