Frequency Measurement Methods by Signal Processing Techniques

A set-up for measurement of low frequency conductance fluctuation (noise) using digital signal processing techniques

We describe a set up for measurements of low frequency (1 mHz ∼ f ∼ 20 Hz) conductance fluctuations in a solid conductor. The set-up uses a five probe a.c. measurement technique and extensive digital signal processing to reach a noise floor down to Sv(f) ≤ 10−20 V2Hz−1. The set up also allows measurement of noise using an a.c. in presence of a superimposed direct current. This feature is desira...

Wavelet-Based Signal Processing Techniques For Disturbance Classification and Measurement

This paper presents the wavelet domain theoretical basis for rms value and total harmonic distortion measurements. It provides a systematic method for analyzing power system disturbances in the wavelet domain. The wavelet domain capabilities in detection, classification, and measurements of different power system disturbances are presented. The distortion event is mapped into the wavelet domain...

High-Precision Frequency Measurement Using Digital Signal Processing

High-precision frequency measurement techniques are important in any branch of science and technology such as radio astronomy, high-speed digital communications, and highprecision time synchronization. At present, the frequency stability of some of atomic oscillators is approximately 1E-16 at 1 second and there is no sufficient instrument to measure it (C. A. Greenhall, 2007). Kinds of oscillat...

6 High - Precision Frequency Measurement Using Digital Signal Processing

Newborn EEG connectivity analysis using time-frequency signal processing techniques

.............................................................................................................................................. ii Declaration by author ....................................................................................................................... iv Publications during candidature .............................................................................