摘要
采样保持器可有效扩展模拟带宽,后级模数转换器(ADC)以较低的采样率即可完成对超宽带射频信号的采集处理。由采样定理可知,当信号带宽超过采样率的1/2时,会产生频率模糊。提出了一种基于异采样率解频率模糊的算法,可适应输入射频信号带宽数倍于采样率时的频率解模糊,分析该算法原理以及关键参数设置,采用实例对该算法的可行性进行验证。
The sampling holder can effectively expand the analog bandwidth.The latter stage analog to digital converter(ADC)can complete the sampling and processing of ultra wide band radio frequency(RF)signals with low sampling rate.According to the sampling theorem,when the signal bandwidth exceeds half of the sampling rate,frequency aliasing will occur.This paper proposes a frequency aliasing resolution algorithm based on different sampling rates,which can adapt to the frequency aliasing resolution when the bandwidth of the input RF signal is several times of the sampling rate,analyzes the algorithm principle and key parameter setting,verifies the feasibility of the algorithm through an example.
作者
王力
姚君宇
WANG Li;YAO Jun-yu(The 51st Research Institute of CETC,Shanghai 201802,China)
出处
《舰船电子对抗》
2022年第3期101-104,共4页
Shipboard Electronic Countermeasure
关键词
超宽带
异采样率
频率模糊
ultra wide band
different sampling rates
frequency aliasing
