摘要
平方率包络检波与基于希尔伯特变换的包络检波是工程应用中2种典型的脉冲信号包络提取方法。在对二者检波模型简要概述的基础上,指出了基于希尔伯特变换的检波方法是平方率检波方法在射频带宽与视频带宽相等条件下的特例。在对提升平方率检波器性能进行讨论的基础上,给出了雷达侦察接收机灵敏度的新计算方法,着重反映了不同的信号带宽对灵敏度评价的重要影响,即在不同信号带宽条件下雷达侦察接收机的灵敏度也是不同的。通过仿真验证了上述理论分析的正确性,从而为雷达侦察数字接收机的方案论证、系统设计与指标分析提供了新的参考与指导。
The square rate envelope detection and envelope extraction based on Hilbert transformation are two typical methods for the pulse signal envelope extraction in engineering application.After a brief overview of their detection models,it is pointed out that the method based on Hilbert transformation is a special case of the square rate detection method under the condition that the radio bandwidth is equal to the video bandwidth.After the approach to improve the performance of the square rate detector is discussed,the new method for sensitivity calculation of radar reconnaissance receiver is proposed,which reflects the important influence of different signal bandwidth on sensitivity evaluation.The sensitivity of radar reconnaissance receiver is different under the various signal bandwidth.Finally,the theoretical analysis is verified by simulations.It provides the new reference and guidance for the scheme demonstration,system design and specification analysis of the radar reconnaissance digital receiver.
作者
石荣
邓科
阎剑
SHI Rong;DENG Ke;YAN Jian(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China)
出处
《无线电工程》
北大核心
2021年第1期1-7,共7页
Radio Engineering
基金
国家部委基金资助项目。
关键词
雷达侦察
脉冲信号包络
平方率检波
希尔伯特变换
切线灵敏度
侦察灵敏度
全频段功率信噪比
信号带内功率信噪比
radar reconnaissance
pulse signal envelop
square rate envelope detection
Hilbert transformation
tangent sensitivity
reconnaissance sensitivity
full-band power SNR
signal in-band power SNR
