论文部分内容阅读
本文介绍了一种适用于脉冲多卜勒雷达接收机的距离自动增益控制,它采用自适应开环前向控制方案,当雷达处于搜索工作方式时,能在某个距离区段△R内瞬时调整接收机的增益,压缩信号的动态范围,保证接收机线性工作。在电路实现上采用了模数结合方案,获得了控制响应小于O.2微秒,控制范围为30分贝,控制精度优于±1分贝,输出振铃低于-50分贝的性能。考虑数控增益放大器本身设计有60分贝的动态范围,所以该系统能线性处理具有90分贝动态范围的回波。文章简述了距离自动增益控制的设计思想,工作原理和设计要点,并给出了实验测试的结果和部分照片。
This paper introduces a range of automatic gain control for pulsed Doppler radar receiver, which uses adaptive open-loop forward control scheme, when the radar is in the search mode of operation, in a distance segment △ R instantaneous Adjust the gain of the receiver, compress the dynamic range of the signal, guarantee the linear work of the receiver. In the implementation of the circuit using modulus combination program, the control response is less than 0.2 microseconds, the control range of 30 dB, the control accuracy better than ± 1 dB, the output ringing performance of less than-50 dB. Considering the design of the digital gain amplifier itself has a dynamic range of 60 dB, the system can linearly process echoes with 90 dB dynamic range. The article briefly describes the design concept, working principle and design points of AGC, and gives the results and some photos of the experiment.