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In this paper, we show that an NPR M-channel filter bank with a diagonal system inserted between the analysis and synthesis filter banks may be used to decompose an FIR system of order L into M complex subband components each of order L K , where K is the downsampling rate. This decomposition is at the expense of using complex arithmetic for the subband(More)
In this paper, we propose a new frequency domain approach to blind source separation (BSS) of audio signals mixed in a reverberant environment. We propose a joint diagonalization procedure on the cross power spectral density matrices of the signals at the output of the mixing system to identify the mixing system at each frequency bin up to a scale and(More)
This paper proposes a novel wideband structure for array signal processing. A new interpolation model is formed where the observations are linear functions of the source amplitudes but nonlinear in the direction of arrival (DOA) parameters. The interpolation model also applies to the narrowband case. The proposed method lends itself well to a Bayesian(More)
In this paper we present a new method for separating non-stationary sources from their convolutive mixtures based on approximate joint diagonalizing of the observed signals' cross-spectral density matrices. Several blind source separation (BSS) algorithms have been proposed which use approximate joint diagonalization of a set of scalar matrices to estimate(More)
An ion mobility/mass spectrometry technique has been developed to record mass-resolved ion mobility distributions for multiple ions simultaneously. The approach involves a new instrument that couples an electrospray ion source to an injected-ion drift tube/time-of-flight mass spectrometer. Individual components in a mixture of ions are separated by mobility(More)
Ribosomes from the K-12 strain of E. coli were analyzed with good sensitivity and high mass accuracy using MALDI-TOFMS. 55 of 56 subunit proteins were observed. Observed masses were consistent with previously reported post-translational modifications involving N-terminal methionine loss, methylation, thiomethylation, and acetylation for all but one case.(More)
Vacuum ultraviolet photodissociation of peptide ions in a matrix assisted laser desorption ionization (MALDI) tandem time-of-flight (TOF) mass spectrometer is used to characterize peptide mixtures derived from Deinococcus radiodurans ribosomal proteins. Tryptic peptides from 52 proteins were separated by reverse-phase liquid chromatography and spotted onto(More)