【摘要】 城市路灯监控系统采用电力线载波通信技术实现路灯单灯控制。有利于城市路灯的数字化管理,满足了社会发展的需求,响应了国家绿色照明计划。由于采用电力线作为通讯介质,其本身有着很大的局限性,低压电网是一个时变的频率选择性衰落信道,信号衰减、阻抗变化和噪声干扰是影响低压电网信道特性的最主要的因素。因此,必须采用具有很强自适应能力的路由中继方案与调制技术才能满足低压电力线载波通信网络的需要。提出了OFDM调制解调方式及采用蚁群算法的路由中继策略完成数据传输过程中的最优路径规划问题选择使用,提高电力载波通信质量。更多还原

【Abstract】 Urban street light monitoring system uses power line carrier communication technology to realize street lamp single lamp control.Is conducive to the digital management of urban street lamps to meet the needs of social development,in response to the national green lighting program.Because of the power line as the communication medium,which itself has great limitations.The low voltage grid is a time-varying frequency selective fading channel.Signal attenuation,impedance change and noise interference are the most important factors influencing the channel characteristics of low voltage power network.Therefore,it is necessary to adopt a route relay scheme and a modulation technique with strong adaptability to meet the needs of low voltage power line carrier communication network.In this paper,the OFDM modulation and demodulation method and the routing relay strategy using ant colony algorithm are used to optimize the optimal path planning problem in the data transmission process,and improve the quality of power carrier communication.更多还原