摘要
为有效提高低压窄带电力线载波通信单元的抗衰减、抗噪声和抗阻抗变化能力,降低载波信号耦合衰减,高度保真经载波芯片编码、调制后的信号功率,设计了一种改进的高速电力线载波通信收发电路。以303.13k Hz^357.81k Hz为子载波信号载频,可有效地规避35k Hz以下的大功率电力电子设备和家用电器产生的随机噪声,同时防止以270k Hz、421k Hz为中心频率的电力线载波产品的频率串扰,采用Y耦合电容与六阶巴特沃斯型带通滤波电路设计通信单元信号收发电路,隔离无用信号。在电路仿真软件Multisim 12上对所设计的电路进行了实验仿真,结果表明:设计的电力线载波通信收发电路能够有效将信号耦合衰减控制在4d B以内,对无用信号的滤波也达到了41.7d B以上,具有很高的应用价值。
In order to develop the ability of anti-attenuation,anti-noise and anti impedance variation for low voltage nar- row band power-line communication unit,an improved high speed power-line carrier communication transceiver circuit is design to highly retain signal power which is coded and modulated by MCU303 13kHz-35781kHz is set to be the subcarrier＇s working band which can avoid some random noise generated by high power electric power electronic equipment and household electric appliance whose frequency is below 35kHz .
出处
《工业控制计算机》
2016年第9期136-137,140,共3页
Industrial Control Computer
基金
贵州电网科技项目(GZ2014-2-0006)
关键词
载波通信
耦合衰减
收发电路
带通滤波
carrier communication,coupled attenuation,transceiver circuit,band pass filter
