摘要
在分析单频复信号离散观察值的傅里叶变换的基础上,提出利用傅里叶变换主瓣内多根谱线的相位进行频率估计的算法。该方法具有临界阈值低、频率估计为无偏、频率估计范围大等特点。仿真表明,该方法对单频复信号频率估计的精度仅比克拉美—罗限(CRLB)差2dB左右。
Based on the analysis of the DFF of discrete observations of single-tone complex signal, a new frequency estimation is proposed with the phase of a few coefficents in the DFr＇s main-lobe. By the way, the proposed method has many advantages, such as low threshold effect, unbiased estimation, and wide range of frequency estimation and so on. At last, simulations demonstrate that the estimation accuracy of the proposed estimator is about 2dB worse than that of the CRLB when applied to single-tone complex signal.
出处
《电子信息对抗技术》
2013年第1期13-16,68,共5页
Electronic Information Warfare Technology
关键词
频率估计
CRLB
无偏估计
frequency estimation
CRLB
unbiased estimation
