一种对FFT结果再处理以提高测频精度的方法  

A Method to Improve the Accuracy of Frequency Measurement by Reprocessing FFT Results

作　　者：罗东 钱玲[2] 闫守洪 杜尚勇 LUO Dong;QIAN Ling;YAN Shouhong;DU Shangyong(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China;Chengdu Textile College,Chengdu 611731,China)

机构地区：[1]电子信息控制重点实验室,成都610036 [2]成都纺织高等专科学校,成都611731

出　　处：《电子信息对抗技术》2021年第6期76-78,88,共4页Electronic Information Warfare Technology

摘　　要：提出一种基于对FFT(Fast Fourier Transform,快速傅里叶变换计算)处理结果(离散频点数值)再进行处理,可以提高测频精度的方法。先对该方法原理进行分析,然后用实际仿真验证其能够提高单频点脉冲、连续波、通信信号的频率测定精度。该实现方法简单,计算量小,能够提高数字接收机瞬时测频精度,具有一定的实际应用价值。The accuracy of frequency measurement could be improved with the new method based on reprocessing FFT results(discrete frequency value).The principle of the method is analyzed.The actual simulation application shows that,for single frequency point pulse,continuous wave,communication signal,the frequency measurement accuracy can be effectively improved.The method is simple and the amount of calculation is small.It has a certain practical value for the digital receiver to improve the accuracy of instantaneous frequency measurement.

关 键 词：FFT 数字接收机 测频精度 数学期望 

分 类 号：TN971.1[电子电信—信号与信息处理]