基于数字补偿的实时自动增益控制技术研究

阐述了基于前馈技术的实时自动增益控制的原理及同步和数字补偿等关键技术的实现;介绍了在通信分析仪中的具体应用。采用的实时自动增益控制电路利用信号通路的延迟特性,精确控制模数转换器同步,实时调整信号增益,在数字域补偿误差,扩展系统动态范围。该技术成功应用于通信分析仪,并在雷达、电子对抗和接收机中得到推广。

Research on Real-Time Automatic Gain Control Based on Digital Compensation

This paper introduces the principle of real-time automatic gain control based on feed forwarding technology, and the realization of the critical technologies including digital compensation and synchronization, as well as, the specific application of communication analyzing instrument. The real-time automatic gain control makes full use of the delay feature of signal channel, and controls the synchronization of ADC precisely, and adjusts the signal gain in real-time, and compensates the error in digital domain, at last, this kind of technology expands the dynamic range of system ADC. This technology has been applied to the communication analyzing instrument; meanwhile, it can be extended to the field of radar, anti-electronic and receiver.