摘要
基于敌我识别(IFF)模式5询问信号,在采样点数较少、不能增加点数情况下研究了提高测频精度的方法,无噪声与加入高斯白噪声的情况下,采用快速傅里叶变换(FFT)测频粗估计信号载波频率,利用谱峰位置插值校正的方式减小频率估计误差,提高测频精度。仿真结果表明该方法简单,能够有效提高测频精度。
This paper studies the method to improve the accuracy of frequency measurement based on identification of friend or foe(IFF)mode 5 interrogation signal in the conditions of the number of sampling points is small and the number of points can't be increased,uses fast Fourier transform(FFT)frequency measurement to evaluate the signal carrier wave frequency roughly,utilizes spectrum peak position interpolation correction mode to reduce the frequency estimation error and increase the accuracy of frequency measurement in the case of nosie-free and adding Gaussian white noise.Simulation results show that the method is simple and can effectively improve the accuracy of frequency measurement.
出处
《舰船电子对抗》
2017年第5期12-17,共6页
Shipboard Electronic Countermeasure
关键词
敌我识别
则频
快速傳里叶变换
精度
identification friend or foe
frequency measurement
fast Fourier transform
accuracy
