A FAST BIT-LOADING ALGORITHM FOR HIGH SPEED POWER LINE COMMUNICATIONS

作     者：Zhang Shengqing Zhao Li Zou Cairong 

作者机构：Key Laboratory of Underwater Acoustic Signal Processing of Ministry of Education SouthEast University 

出 版 物：《Journal of Electronics(China)》 (电子科学学刊（英文版）)

年 卷 期：2012年第29卷第5期

页      面：461-468页

学科分类：11[军事学] 0810[工学-信息与通信工程] 1105[军事学-军队指挥学] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 081002[工学-信号与信息处理] 110503[军事学-军事通信学] 

基　　金：Supported by the National Natural Science Foundation Project (No. 60872073, No. 60975017, and No. 51075068) Doctoral Fund of Education Ministry (No. 2011009213-0004) 

主　　题：Power line communications Orthogonal Frequency Division Multiplexing (OFDM) Bit-loading 

摘      要：Adaptive bit-loading is a key technology in high speed power line communications with the Orthogonal Frequency Division Multiplexing (OFDM) modulation technology. According to the real situation of the transmitting power spectrum limited in high speed power line communications, this paper explored the adaptive bit loading algorithm to maximize transmission bit number when transmitting power spectral density and bit error rate are not exceed upper limit. With the characteristics of the power line channel, first of all, it obtains the optimal bit loading algorithm, and then provides the improved algorithm to reduce the computational complexity. Based on the analysis and simulation, it offers a non-iterative bit allocation algorithm, and finally the simulation shows that this new algorithm can greatly reduce the computational complexity, and the actual bit allocation results close to optimal.