IFF模式5高精度测频方法研究  

Research into High Accuracy Frequency Measurement Method of IFF Mode 5

作　　者：詹银芳 王姜铂[1] 

机构地区：[1]中国电子科技集团公司第三十六研究所,浙江嘉兴314033

出　　处：《舰船电子对抗》2017年第5期12-17,共6页Shipboard Electronic Countermeasure

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.

关 键 词：敌我识别 则频 快速傳里叶变换 精度 

分 类 号：TN971.1[电子电信—信号与信息处理]