We present a parametric statistical characterization of texture images in the context of an overcomplete complex wavelet frame. The characterization consists of the local autocorrelation of the coefficients in each subband, the local autocorrelation of the cofficent magnitudes, and the crosscorrelation of coefficient magnitudes at all orientations and adjacent spatial scales. We develop an effi...

Correlation Network model. This model (hereafter CN model) is an abstract model of auditory processing that allows a range of auditory signal-processing functions to be implemented in a uniform way: pitch, timbre, localization, segregation. It consists of three modules (Fig. 1). The first calculates arrays of running autocorrelation (monaural) and crosscorrelation (binaural) coefficients. The s...

Seismic interferometry is the process of generating new seismic traces from the crosscorrelation, convolution or deconvolution of existing traces. One of the starting assumptions for deriving the representations for seismic interferometry by crosscorrelation is that there is no intrinsic loss in the medium where the recordings are performed. In practice, this condition is not always met. Here, ...

We consider the slot-synchronized collision channel without feedback, in which K active users all transmit their packets to one sink. It is assumed that the channel has the ability of the multiple-packet reception (MPR), i.e., can accommodate at most γ (1 ≤ γ < K) simultaneous transmissions. Each user accesses the channel following a specific periodical zero-one pattern, called the protocol seq...

Correlation Network model. This model (hereafter CN model) is an abstract model of auditory processing that allows a range of auditory signal-processing functions to be implemented in a uniform way: pitch, timbre, localization, segregation. It consists of three modules (Fig. 1). The first calculates arrays of running autocorrelation (monaural) and crosscorrelation (binaural) coefficients. The s...

A new method is used to resolve a long-standing conjecture of Niho concerning the crosscorrelation spectrum pair maximum length linear recursive sequences 2 2m -1 with relative decimation d=2 xmlns:xlink="http://www.w3.org/1999/xlink">m+2 -3, where m even. The result indicates that there a...

Frequency offset estimation is an important module in the downlink synchronization process of orthogonal frequency division multiplexing (OFDM) system. Research on frequency synchronization of OFDM, a lowcomplexity and efficient method is proposed to evaluate frequency offset in this paper. In general, maximum likelihood (ML) based on cyclic prefix (CP) and primary synchronization signal (PSS) ...

Immunogold staining and electron microscopy show that IL-2 receptor alpha-subunits exhibit nonrandom surface distribution on human T lymphoma cells. Analysis of interparticle distances reveals that this clustering on the scale of a few hundred nanometers is independent of the presence of IL-2 and of the expression of the IL-2R beta-subunit. Clustering of IL-2Ralpha is confirmed by confocal micr...

As part of a project into speech recognition in meeting environments, we have collected a corpus of multi-channel meeting recordings. We expected the identification of speaker activity to be straightforward given that the participants had individual microphones, but simple approaches yielded unacceptably erroneous labelings, mainly due to crosstalk between nearby speakers and wide variations in...