Channel Resource Allocation For Power Line Communication System Based On OFDM

OFDM and dynamic spectrum optimization technology in the PLC are researched in this paper.Based on the character of power line channel,the paper make a research of dynamic spectrum optimization technology in the case of the single user,multi-user optimization to improve the performance of the high speed PLC systems,realize a single user rapid bit-loading algorithm.The simulation of the algorithm in signal spectrum limitation circumstance is also made,which decreases the complexity of operation on the basis of guaranteeing the performance of bit-loading results.Additionally a multi-user spectrum optimization method is introduced in the PLC domain to improve the utility rate of the frequency band according to the severe frequency selecting fading of the power-line channel and difference of multi users' channel characteristic.