【摘要】 针对电力线信道恶劣的情况,分析了跳频技术应用于电力线通信的抗干扰能力,抑制频率选择性衰减能力和多址性。利用电力系统三相交流电压过零点和高速数字频率合成器解决了跳频系统中同步和快速频率合成的两个关键问题。分析结果表明跳频技术应用于高速电力线通信不但可以提高传输数据的可靠性,还可以使传输速率达到每秒兆比特数量级。更多还原

【Abstract】 Regarding to the hostile channel properties of electrical power line for communication purposes,the properties of frequency hopping technique in anti-interference capability,frequency selective fading suppression and multi-address communication are analyzed.The zero-crossings of the AC voltage and digital frequency synthesizer are used in solving the two main problems in frequency hopping system-synchronization and fast frequency synthesizing.The results show that the application of frequency hopping in high-speed power line communication can not only enhance the reliability of transmission but also transmit the data as fast as Mbps.更多还原