Impact of unknown offset in amplitude estimation of a digitized sine wave

2009 ◽  
Author(s):  
D. Bellan
Keyword(s):  
Sine Wave ◽  
Amplitude Estimation

scholarly journals On the Validity of the Noise Model of Quantization for the Frequency-Domain Amplitude Estimation of Low-Level Sine Waves

2015 ◽  
Vol 22 (1) ◽  
pp. 89-100 ◽  
Author(s):  
Diego Bellan
Keyword(s):  
Standard Deviation ◽  
Frequency Domain ◽  
High Speed ◽  
Time Window ◽  
Random Variable ◽  
Sine Wave ◽  
Noise Model ◽  
Analog To Digital ◽  
Low Level ◽  
Amplitude Estimation

Abstract This paper deals with the amplitude estimation in the frequency domain of low-level sine waves, i.e. sine waves spanning a small number of quantization steps of an analog-to-digital converter. This is a quite common condition for high-speed low-resolution converters. A digitized sine wave is transformed into the frequency domain through the discrete Fourier transform. The error in the amplitude estimate is treated as a random variable since the offset and the phase of the sine wave are usually unknown. Therefore, the estimate is characterized by its standard deviation. The proposed model evaluates properly such a standard deviation by treating the quantization with a Fourier series approach. On the other hand, it is shown that the conventional noise model of quantization would lead to a large underestimation of the error standard deviation. The effects of measurement parameters, such as the number of samples and a kind of the time window, are also investigated. Finally, a threshold for the additive noise is provided as the boundary for validity of the two quantization models

Effects of sine wave contexts on compensation for coarticulation

2009 ◽  
Author(s):  
Navin Viswanathan ◽  
James S. Magnuson ◽  
Carol A. Fowler
Keyword(s):  
Sine Wave

High-precision Steady Speed Flywheel System based on Sine Wave Drive

2019 ◽  
Author(s):  
Enyu Ma ◽  
Hui Zhao ◽  
Shuo Chen ◽  
Shuai Wang ◽  
Xin Huo ◽  
...  
Keyword(s):  
High Precision ◽  
Sine Wave ◽  
Wave Drive
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