2005•Telecommunications for Electric Power SystemRequires access

Research on channel estimation algorithms for OFDM system and its applications in low-voltage power line communication

Xuan Geng

Abstract

Low-voltage power line communication will play an important role in the future high rate data communication services because of its special access advantages.Orthogonal frequency division multiplexing(OFDM)technology has strong anti-multi-path ability that is very fit for multi-path transmission in low-voltage power line.In coherent demodulation OFDM system,channel estimation requires to get channel state information(CSI).In this paper,some algorithms for estimating channel in OFDM system are analyzed and compared,and the most appropriate one is selected according to power line channel's characteristics.

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Key concepts: Orthogonal frequency-division multiplexing, Channel (broadcasting), Power-line communication, Demodulation, Electronic engineering, Computer science, Line (geometry), Channel state information