数字载波抄表系统研制与通信性能分析

Design of digital carrier meter reading system and analysis of its communication performance

设计了一种符合我国电力线载波信道传输特性的数字载波抄表系统,该系统放弃了传统的载波芯片,综合窄带调频及宽带扩频通信的优势以最新的MCU为硬件平台用软件进行调制解调嵌入载波通信功能,各项参数可自适应调整以适应时变性大的载波信道。该系统的抗衰减和抗干扰性能具备较强的优势,同时集中器还能够根据信道参数准确选择中继接力路径,该系统能够实现可靠的电力载波抄表,且成本低廉。

A digital carrier meter reading system is designed,which accords with the character of China's low voltage power line transmission.Having given up the traditional carrier wave chips,it takes the lates MCU as its HW platform to combine the superiority of narrow-band frequency modulation communication adn broadband spread-spectrum communication.The carrier comunication frunction of modulation and demodulation is realized with SW,in which the parameters can be self-adjusted to adapt to the carrier channels with time-to-time variable qualities.The system has better performance in anti-jamming and anti-attenuation and the hub selects the relay route pro-perly according to the parameters of communication channels.The system can carry out reliable meter reading with low cost.