摘要
电力线载波通信具有经济、可靠等优点,具有很广泛的应用前景。鉴于井下恶劣的通信环境,探讨了电力线载波通信在矿井通信中的应用,给出了OFDM系统的信道模型。通过对电力线OFDM系统同步问题的分析,在ML算法的基础上提出了一种改进的ML算法。最后通过MATLAB仿真可以看出,此算法在电力线载波通信中可以有效提高符号定时和载波频偏估计,提高了电力线载波通信在矿井通信中的通信质量。
The carrier communication with an electric power line can have economic, reliable and other advantages and would have an extensive application prospect. In consideration of the harsh communication environment in underground mine, the paper discussed the application of the cartier communication with the electric power line to the mine communication and a channel model of the OFDM system was provided. With the analysis on the synchronous problems of the electric power line OFDM system, base on the ML algorithm, an improved ML algorithm was provided. Finally the MATLAB simulation showed that the algorithm could effectively improve the symbol timing and the carrier frequency offset estimation and could improve the communication quality of the power line carrier communication in the mine communication.
出处
《煤炭工程》
北大核心
2013年第1期128-130,共3页
Coal Engineering
