CAJ | 학술논문

正交频分复用（OFDM）技术是常用的电力通信调制技术。本文在深入研究OFDM基本原理和电力线信道特性的基础上，建立电力通信系统模型，对该模型采用4QAM、16QAM、BPSK三种调制方式以及DTF、LS、MMSE三种信道估计算法进行了MATLAB性能仿真，得出结论在一定条件下运用QAM调制方式及LS算法更能体现了OFDM技术应用于电力线通信的优越性。同时，也为我们在不同环境下为提高通信系统整体性能，信道估计算法的选择提供了有力依据。
정교빈분복용（OFDM）기술시상용적전력통신조제기술。본문재심입연구OFDM기본원리화전력선신도특성적기출상，건립전력통신계통모형，대해모형채용4QAM、16QAM、BPSK삼충조제방식이급DTF、LS、MMSE삼충신도고계산법진행료MATLAB성능방진，득출결론재일정조건하운용QAM조제방식급LS산법경능체현료OFDM기술응용우전력선통신적우월성。동시，야위아문재불동배경하위제고통신계통정체성능，신도고계산법적선택제공료유력의거。
Orthogonal frequency division multiplexing technology is a common power communication modulation technology. This paper points in the study of orthogonal frequency multiplexing principle and the basis of power line channel characteristics to establish the communication model of power system, the model have 4QAM, 16QAM, BPSK three types of modulations, as well as DTF, LS, MMSE, three kinds of channel estimation algorithm MATLAB simulation is the conclusion. Under certain conditions, the use of QAM modulation mode and LS algorithm can refiect the superiority of OFDM technology in power line communication. At the same time, it also provides a strong basis for the selection of the channel estimation algorithm for improving the overall performance of the communication system under different conditions.