Title :
Research on the broadband power line communication system based on adaptive OFDM
Author :
Xuhui, Zhang ; Junfeng, Jia ; Yingjie, Zhao ; Jiaxin, Wei
Author_Institution :
Higher Educ. Key Lab. for Meas. & Control Technol. & Instrum. of Heilongjiang Province, Harbin Univ. of Sci. & Technol., Harbin, China
Abstract :
There are characteristics of high noise, big attenuation, the big impedance variation and the uneven frequency response on low-voltage power line channel. Firstly, this paper proposes the combination the adaptive technology with the OFDM technology to realize the reliable and high-speed data transmission channel. It is a key to study the channel estimation of the OFDM technology and the channel allocation of the adaptive technology. Then, we put forward to the algorithm of comb-type pilots Unscented Kalman Filter, and we use the time-frequency domain estimation algorithm to improve the channel estimation accuracy. Lastly, we take the improving particle swarm algorithm to solve the problem of the channel allocation and the bit allocation, realize the sub-carrier bits and the power allocation in multiuser adaptive OFDM system, save running time, reduce the transmitted power and enhancing the efficiency of spectrum.
Keywords :
Kalman filters; OFDM modulation; adaptive modulation; carrier transmission on power lines; channel allocation; channel estimation; particle swarm optimisation; OFDM technology; adaptive technology; broadband power line communication system; channel allocation; channel estimation; comb-type pilots unscented Kalman filter; high-speed data transmission channel; low-voltage power line channel; multiuser adaptive OFDM system; particle swarm algorithm; time-frequency domain estimation algorithm; Adaptation model; Adaptive systems; Channel estimation; Modulation; OFDM; Resource management; Signal to noise ratio; Adaptive OFDM; Channel Estimation; Low-voltage power line communication; it and Power Allocation;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on
Conference_Location :
XianNing
Print_ISBN :
978-1-61284-458-9
DOI :
10.1109/CECNET.2011.5768726