Based On Ofdm Low-voltage Power Line Carrier Communication And Its Intelligent Queuing System

Power Line Communication refers to the data transmission and information exchange over power line. PLC is getting more and more advantages such as connection easy and low costing. But because of high speed time variant and multi-path affection in PLC, the problem of Inter symbol interference is seriously. Orthogonal Frequency Division Multiplexing (OFDM) technique has attracted the attention of people for it can combat multi-path fading and has high band-width efficiency. It also has some disadvantages and problems. A great obstacle of applying OFDM is the largeness calculate data, the time of calculate process is long. To cut down the time of calculate, this paper discuss the algorithm of dynamic resource allocation.This paper analyzing the key technologies of OFDM and character of low voltage power line, through the research of Water-filling algorithm and some other classical algorithms have been studied, a new algorithm which allocate digital rapidly decide the feedback message be raised. It can allocate digital rapidly by the circumstance of power line. The result shows that dynamic resource allocation algorithms are better than fixed resource allocation algorithm, and the algorithm with rate control can allocate the resources more effectively among multi-users. At last a queue system based on the MCU and PLC be raised, It has been proved to be reliable and stable work with PLC.