Analysis of the Influence of Observation Starting Time on FFT-based Phase Estimation of Sinusoid

摘要：

The initial phase estimation technique based on FFT of single-tone signal is reviewed first. By employing the same signal expression as used in all-phase FFT, estimation equation of the middle-point phase of the signal is derived. It is proved that middle-point phase estimation of conventional FFT has the same property as all-phase FFT, i.e., the estimation is not affected by the deviation between the frequency of the sinusoid signal and the frequency the maximum spectral line of the FFT stands for. This property leads to the avoidance of the correction to the phase estimation. The formula for evaluating the variance of the estimation is also derived. Finally computer simulation results are given.

关键词： phase estimation sinusoid signal FFT all-phase FFT

作者: QI Guoqing LU Jian

作者单位: College of Information Science and Technology, Dalian Maritime University, Dalian, China College of Navigation, Dalian Maritime University, Dalian, China

会议类型: 国际会议

会议名称: 2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)

会议地点: 北京

会议语种:英文

页码: 26-29

在线出版日期: 2010-08-24（万方平台首次上网日期，不代表论文的发表时间）