Wai Yie Leong

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We provide an overview of blind source extraction (BSE) algorithms whereby only one source of interest is separated at the time. First, BSE approaches for linear instantaneous mixtures are reviewed with a particular focus on the ''linear predictor'' based approach. A rigorous proof of the existence BSE paradigm is provided, and the mean-square prediction(More)
Existing blind source extraction (BSE) methods are limited to noise-free mixtures, which is not realistic. We therefore address this issue and propose an algorithm based on the normalised kurtosis and a nonlinear predictor within the BSE structure, which makes this class of algorithms suitable for noisy environments, a typical situation in practice. Based(More)
—An extension of blind source extraction (BSE) of one or a group of sources to the case of ill—conditioned and post-non-linear (PNL) mixing is introduced. This is achieved by a " mixed objective " type of cost function which jointly maximizes the kur-tosis of a recovered source and estimates a measure of nonlinearity within the mixing system. This helps to(More)
The noisy component extraction (NoiCE) algorithm is proposed to blind-extract noisy signals. This is achieved based on a combination of blind extraction structure and a cascaded nonlinear adaptive estimation. Although we use the concept of sequential blind extraction of sources and independent component analysis (ICA), we do not assume that sources are(More)
  • Wai Yie Leong
  • 2008
In this paper, we proposed blind source extraction (BSE) technique for signal overlapping problem. The BSE method consists of an additional cascaded nonlinear model, which assists in blind extraction and also reduces the remaining deflation noise. In order to perform simultaneous the nonlinearity estimation and source extraction, a nonlinear cost function(More)
Cutting force and vibration are two major characteristics that reflect the tool state in the milling process. Measurement of vibration on the workpiece or the fixture of the workpiece is one of the indirect methods to evaluate the effects of the cutting force. Currently, there is a lack of tool breakage monitoring solutions using vibration sensor in ball(More)