Spectrum Optimization of Multi-user OFDM Communication System Over Single-phase Power Distribution Network

OFDM is commonly used in power-line communication.For the multi-user communication over a typical power distribution network,an important problem is the spectrum optimization.The spectrum optimization problem over a typical multi-user power-line OFDM communication system is discussed.Based on the principle of solving the problem more holistically and delicately,an improved algorithm of the original rapid optimization algorithm is given.Through the simulation under typical power-line channel environment,the result indicates that the improved algorithm can get higher transmission rate using the same transmit power with a little increment of running time.It is convinced that the improved algorithm has a enhanced efficiency on solving this problem.