摘要
自动增益控制电路(AGC)是数字接收机的重要组成部分,用以减小量化损耗。通过分析数控可变增益放大器(VGA)的工作原理,提出AGC工程实现算法。同时分析了算法的稳态误差,给出了误差改善措施。基于AD8348芯片的工程实测结果表明,该算法能够较好地实现增益控制,满足电子对抗环境下的应用需求。
As an important part of digital receivers, Automatic Gain Control （AGC） circuits are usually used to reduce the loss of C/N0. By analyzing the principle of digital-controlled Variable-Gain Amplifier（VGA）, an algorithm of AGC is proposed for its engineering realization. Then the steady-state error of AGC is analyzed, and the amendment methods are proposed. The results of test based on AD8348 indicate that the algorithm can implement gain control effectively and meet the application requirement under electronic countermeasures.
出处
《电光与控制》
北大核心
2008年第1期77-80,共4页
Electronics Optics & Control
基金
新世纪优秀人才支持计划资助(NCET-04-0995)
关键词
电子对抗
自动增益控制
可变增益放大器
查找表
稳态误差
electronic countermeasure
Automatic Gain Control （AGC）
Variable Gain Amplifier（VGA）
look-up-table
steady-state error
