摘要
针对I-Rife算法和Fang算法计算量增大、低信噪比时性能下降的问题,该文提出了一种快速有效的正弦信号频率精确估计方法,利用两点细化的频谱值估计频率偏移量,不需要判别频率修正方向,降低了算法复杂度和计算量;分析了频偏估计的偏差.仿真结果表明,该算法的整体性能优于I-Rife算法和改进的Fang算法,在保证性能的同时,提高了算法的稳定性和实用性.
For the I-Rife algorithm and the Fang algorithm,the computational load is increased and the performance is low at low SNR.In this paper,a fast and effective sinusoidal signal frequency estimation method is proposed.The frequency offset is estimated by using two refined spectral values.Without discriminating the frequency correction direction that reduces the computational complexity of the algorithm.The bias of the frequency offset estimation is analyzed.The simulation results show that the overall performance of the proposed algorithm is better than the I-Rife algorithm and the improved Fang algorithm,which improves the stability and practicability of the algorithm while ensuring performance.
作者
温兵会
毛卫宁
WEN Binghui;MAO Weining(School of Cyber Science and Engineering,Southeast University,Nanjing 210096,China;School of Information Science and Engineering,Southeast University,Nanjing 210096,China)
出处
《应用声学》
CSCD
北大核心
2020年第4期512-517,共6页
Journal of Applied Acoustics
基金
国家自然科学基金项目(61871124)
水声技术实验室稳定支持项目(JCKYS2019604SSJSSO12)
声呐技术重点实验室基金项目(6142109KF201806)。
关键词
频率估计
频率细化
频率修正方向
克拉美罗界
Frequency estimation
Frequency refinement
Frequency correction direction
Cramer-Rao lower bound
