电力载波通信中软、硬件实现大范围自动增益控制  

Hardware & Software to Realize Broad Range AGC in PLC Communication

作　　者：杨思祥[1] 李宁[2] 胡明慧 

机构地区：[1]解放军理工大学通信工程学院电子信息工程系,江苏南京210007 [2]解放军理工大学科研部,江苏南京210007 [3]南京联创科技股份有限公司,江苏南京210007

出　　处：《军事通信技术》2006年第4期51-53,共3页Journal of Military Communications Technology

摘　　要：电力载波通信信道中信号幅度变化快、变化范围大,文中分析了具有导频的单边带载波话音通信系统中,采用数字整流、检波的办法,实现信号幅度的准确估计,提出了采用衰减器、自动增益控制芯片AD 603以及软件配合的办法,实现大范围自动增益控制(AGC)。采用这种办法可以实现70 dB^80 dB动态范围的增益控制,同时可以将信号的波动降低至0.1 dB的范围。In PLC communication channel, the amplitude of signal fluctuates in a broad scope. A SSB audio communication system was analyzed with a guide frequency. The digital commutation and demodulation were adopted to detect the amplitude precisely. And then, the attenuator, AGC chip AD603 and software airthmetic were used to accomplish the AOC. The AGC system can realize 70 dB-80 dB dynamic scope AOC, and the resulted signal has 0. 1 dB fluctuation.

关 键 词：数字信号处理 检波 自动增益控制 电力载波通信 

分 类 号：TN913.6[电子电信—通信与信息系统]