CAJ | 학술논문

针对低压配电网电力线载波通信信道存在频率选择性衰减，建立了电力线信道模型，并对频率为50 Hz~20 MHz的信道频率响应进行了分析。由于电力线信道存在多径效应，考虑到信道路径对信号衰减的影响，建立了多径信道衰减模型，并对多径信道下的信号频率特性进行仿真，得出的试验结果与预期一致。对电力线载波通信信道进行了改进，在OFDM子载波信道中插入导频符号，改进后系统的仿真误码率较改进前降低了10%。
침대저압배전망전력선재파통신신도존재빈솔선택성쇠감，건립료전력선신도모형，병대빈솔위50 Hz~20 MHz적신도빈솔향응진행료분석。유우전력선신도존재다경효응，고필도신도로경대신호쇠감적영향，건립료다경신도쇠감모형，병대다경신도하적신호빈솔특성진행방진，득출적시험결과여예기일치。대전력선재파통신신도진행료개진，재OFDM자재파신도중삽입도빈부호，개진후계통적방진오마솔교개진전강저료10%。
In view of the frequency selective attenuation existing in power line carrier communication channel of low-voltage distribution network, established PLC channel models and analyzed the channel frequency response at 50 Hz~20 MHz. As the power line channel existed multipath effects, considering the impact of channel paths to signal attenuation, estab-lished a multi-path channel attenuation model and simulated the signal frequency characteristics in multi-path channels. Obtained the experimental results consistent with the expected. Improved the PLC communication channel and inserted a pilot symbol in OFDM subcarriers channel of the system. The simulated bit error rate of the improved system reduced by 10%than before.