Method and system of measuring and optimization of noise in a servo system. The method and system including features to optimize filtering otherwise reducing noise in the system so as to permit improved system operation.

The invention relates to a method of processing a noisy sound signal and to a device for implementing said method. The inventive method includes the following steps which are performed for each frame of a noisy sound signal, consisting in: applying a frequency-domain transform; estimating a power spectral density (PSD) of the noise for the frame; calculating a first noise reduction filter from the estimated PSD of the noise and from an estimation of the PSD of a wanted signal corresponding to th...

A system and method for producing and controlling a random signal with simultaneous control of both the power spectral density (PSD) and kurtosis (100) where a controlled signal is measured from a transducer, and converted to a PSD (111) using a Fast Fourier Transform (FFT). The measured PSD is compared (117) with a reference PSD (121) where an adaptive filter (119) is updated to compensate for the error. Simultaneously the kurtosis of the measured data is computed (125) and compared to a refere...

An apparatus and method of processing flow meter data to filter out signal noise is provided. The method includes defining the flow meter data as a k-.omega. plane, wherein the k-.omega. plane includes a first k-plane quadrant separated from a second k-plane quadrant by a predetermined axis. The flow meter data includes a first data set disposed within the first k-plane quadrant and a second data set disposed within the second k-plane quadrant. The first data set and the second data set are disp...

Correcting a signal offset may include observing a finite duration signal y.sub.n that comprises a representation of a mixture of a desired signal that may include data of interest, and an undesired signal based on interference of an external interference source. The undesired signal may include an offset component which may be modeled as comprising a step function u defined by unknown step function parameters. The unknown step function parameters may be estimated using, for example, a maximum l...

The present invention relates to an interference eliminating method in an adaptive array system, and an array processing device using the interference eliminating method. A predetermined array weight is applied to signals input through respective array elements, and the respective input signals to which the array weight is applied are added to generate an array output signal. Subsequently, the array weight is updated based on the array output signal and a first convergence parameter for unit gai...

Systems and methods for reducing noise in spectral data. A noise burst level is defined. If a spectral point has an intensity greater than the burst level (a burst point), points neighboring the burst point are examined. If a function of these neighboring points indicates that the burst point is a discrete event, then the abundance level of the burst point is altered.

A fault severity check and source identification method for a frequency domain instrument accesses acquired reflection data for a transmission line under test. From the acquired data reflection surfaces are isolated as a function of distance. Each reflection surface is examined to produce a frequency response profile and a worst-case reflection response to determine fault severity. The frequency response profile may also be correlated in a pattern recognition algorithm with known reference sourc...

A thorough error suppression signal measurement system (20) having a transmitter (300) for propagating a transmission signal to a first probe 100, through a device under test (26), and into a second probe (200), and for propagating reference signals to the probes (100,200). The probes (100,200) extract normalization signals from the reference signals, exchange specific ones of the normalization signals, and combine the normalization signals with data signals derived from the transmission signal ...

An improved system and method for designing a mother wavelet. The system and method first displays on the screen a filter P(z), wherein a mother wavelet is associated with the filter P(z). The filter P(z) is a product of two low pass filters G.sub.0 (z) and H.sub.0 (z), which collectively comprise a perfect reconstruction filter bank which models the wavelet. The method then displays on the screen a plot which illustrates a zeros distribution of P(z), as well as other information, such as the mo...