摘要
接收机中,常用包络检波方式的前置AGC电路控制中频增益。但是,在宽带短波直扩通信系统中,普通前置AGC电路控制速度慢,且容易误控制。为了克服其缺陷,提出了一种双路AGC控制方式,替代原来的自动增益控制方式,使之适合高速数据传输。文章给出了双AGC控制的原理框图。实验结果表明,双AGC控制在短波扩频通信中是有效的。
To overcome the disadvantages of slow speed and malfunction of the envelope detector AGC, which is usually used in receivers for controlling IF gain, a double AGC controller is introduced into the HF DSSS communication system for high-speed data transmission. The functional block diagram is described, and testing results are discussed. It is demonstrated that the double AGC controller is useful in HF DSSS communication.
出处
《微电子学》
CAS
CSCD
北大核心
2004年第4期486-488,共3页
Microelectronics
关键词
短波扩频通信
自动增益控制
直接序列扩频
包络检波
Automatic gain control
Short-wave communication
High frequency
Direct sequence spread spectrum
