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提出了一种扩频载波或窄带载波数字脉冲间隔调制 (C- DPIM)电力线载波通信系统。采用线性扫频扩频载波对 DPIM符号进行编码 ,引入脉冲前导码作为传输数据块的同步信号以防止差错传播 ,并采用单片机实现了该系统。研制了电力线载波通信接口收发控制器 ,使其在呈时变、高信号衰减特性并存在复杂干扰的电力线网络上实现理想的数字通信 ,已成功地用于基于列车 3 80 V电力线载波通信的列车信息集中监控系统
A spread spectrum carrier or narrowband carrier digital pulse spacing modulation (C-DPIM) power line carrier communication system is proposed. The DPIM symbol is encoded by a linear sweep spread spectrum carrier, and a pulse preamble is introduced as a synchronization signal of a transmission data block to prevent error propagation. The system is implemented by a single chip microcomputer. Developed a power line carrier communications interface transceiver controller to enable ideal digital communications over powerline networks that exhibit time-varying, high-signal attenuation characteristics and complex interference and have been successfully used for trains based on 380V power line carrier communications Information centralized monitoring system