in order to estimate doa of coherent sources, shirvani moghaddam and keshavarz nasab proposed a method based on uniform linear array configuration that first determines the number of noncoherent sources and then estimates the doa of coherent signals in each group. for estimating doas close to the array endfire, ula does not perform well. as the main goal of this investigation, using the propose...

A new efficient method for implementing narrowband FlR jilters is presented. The method is based on an lnterpolated jilter (lFlR) structure and a cascade of comb and integrator (ClC) structures. The novelty ofthís technique ís that the ClC structure is used as an image suppressor in an lFlR structure. The method is useful for narrowband FlRjilter design and some design examples for lowpass and ...

We describe a time-resolved method for measuring nonlinear ultrasonic phenomena. Current approaches rely on a narrowband measurement of harmonic generation to identify and characterize nonlinearity. Concomitant with these techniques is poor time resolution. We address this limitation with a hybrid narrowband/broadband approach that provides simultaneous time resolution and harmonic isolation fo...

The spectral reflectance (SR) of objects provides innate information about material properties that have proven useful in applications such as classification, synthetic relighting, and medical imaging to name a few. General approaches to hyperspectral (HS) imaging include brute force capture of narrowband image stacks at consecutive wavelengths, use of conventional cameras with computational te...

The scattering of visible light in optically dense sprays compromises the ability of common spray imaging techniques to capture the quantitative liquid mass distribution. Because of reduced susceptibility to multiple scattering, X-ray radiography can overcome the difficulties associated with optical wavelengths and provide quantitative measurements of liquid mass distribution in a variety of sp...

One major disadvantage of multispectral imaging is the amount of data that needs to be stored for each multispectral image. In the past, several authors have proposed compression schemes to overcome this disadvantage. Most of these papers dealt with compression either in the spectral or in the spatial realm only, although some authors proposed to divide the data into luminance and color compone...

Subliminal channels can hide the existence of secret messages, and then they are divided into broadband ones and narrowband ones. While a large amount of information can be transmitted over a broadband one, only a small amount can be done over a narrowband one. It is easy to show that a channel can only be a narrowband one, when a one-way function whose image size is su ciently large and which ...

AbatmctSpread spectrum (SS) communications offers a promising solution to an overcrowded frequency spectrum amid growing demand for mobile and personal communications services. The proposed overlay of spread spectrum signals on existing narrowband users implies strbng interference for the SS system, This paper discusses how system performance can be improved by preprocessing to suppress narrowb...

We recorded local field potentials (LFPs) from cervical spinal cord (C(5)-C(8)) in monkeys performing a precision grip task and examined their coherence with electromyographic (EMG) activities (spinomuscular coherence) recorded from hand and arm muscles. Among 164 LFP-EMG pairs, significant coherence was found in 34 pairs (21%). We classified the coherence into two groups based on its frequency...