数据采集与处理2011，Vol.26Issue(3)：286-291,6.
全相位FFT相位测量法的抗噪性能
Anti-noise Performance of All-phase FFT Phase Measuring Method
摘要
Abstract
In order to study the anti-noise performance of the measuring phase method based on all-phase FFT (apFFT for short), the qualitative observation of the noisy effect on the apFFT amplitude and phase diagrams at different SNR levels is implemented, and the quantitative analysis of the performance of measuring method influenced by Gaussian noise and quantization noise is studied respectively. Then the theoretic variance formula of apFFT measuring method is deduced. Simulation verifies that the actual apFFT measuring phase variance is coincident with the theoretic value, and far lower than that of the conventional FFT. Moreover, the apFFT measuring phase variance approximates the Cramer-Rao lower bound without introducing any extra steps ofestimating frequency.关键词
全相位FFT/相位测量/频谱分析/高斯噪声/量化噪声Key words
all-phase FFT/ phase measuring/ spectral analysis/ Gaussian noise/ quantization noise分类
信息技术与安全科学引用本文复制引用
黄翔东,王兆华..全相位FFT相位测量法的抗噪性能[J].数据采集与处理,2011,26(3):286-291,6.基金项目
国家自然科学基金(60892048)资助项目 （60892048）
天津市应用基础及前沿技术研究计划重点(10JCZDJC16100)资助项目 （10JCZDJC16100）
天津大学B类青年基金(60302008)资助项目. （60302008）
