Recent localization systems do not effectively estimate the location of a target in the presence of dynamic obstacles. This paper presents nonline-of-sight (NLOS) localization technique and system for a quiet and known environment based on the measured time-of-arrival (ToA) of first arrival low-frequency acoustic signals. The true ToA is estimated using the modelled map, and then compared with ...

Multiple-input multiple-output (MIMO) wireless communication systems are of increased interest due to their high spectral efficiency and substantial diversity. Full characterization of the MIMO channel is very important, yet remains a challenge due to the complex electromagnetic interactions between the antenna elements and the environment. We use computational electromagnetics (CEM) to study t...

The multipath components of superwideband (2–17.2 GHz) nonline-of-sight channel responses measured inside several buildings are stable along sections that are 27 cm long on average with a standard deviation of 16 cm. The stability regions of multipath components have an approximately log-normal histogram. An analysis of measured channels that explicitly includes finite spatial areas of visibili...

normal 0 false false false en-us x-none ar-sa microsoftinternetexplorer4 background: definitions of chronic kidney disease (ckd) in many catheterization laboratories have relied on the serum creatinine (scr) rather than glomerular filtration rate (gfr). regarding that ckd is the primary predisposing factor for contrast induced nephropathy (cin), we compared the sensitivity of calculated gfr by ...

We revisit and extend the Riccati theory, unifying continuous-time linear-quadratic optimal permanent sampled-data control problems in finite infinite time horizons. In a nutshell, we prove that following diagram commutes: \beginequation* \xymatrix@R=1.5cm@C=3.5cm (SD-DRE) & E^T,\Delta \ar[r]^T \to +\infty \ar[d]_\Vert \Delta \Vert 0 E^\infty,\Delta \ar[d]^\Vert (SD-ARE) (P-DRE) E^T \ar[r]_T E^...

Given natural numbers n and r , the “greedy” algorithm enables us to obtain an expansion of the integer n as a sum of binomial coefficients in the form (ar r ) + (ar−1 r−1 ) + · · · + (a1 1 ) . We give an alternate interpretation of this expansion, which also proves its uniqueness in an interesting manner. The 1996 Iranian mathematical olympiad competition contained the following problem. For n...

An inversion procedure is used to obtain from the extended principle of corresponding - states the pair interaction potentials for argon, krypton and its mixture over a tetnperature range from absolute zero to the onset of ionization. The experimentally-reduced viscosity collision integrals obtained from the corresponding - states correlation have been inverted directly to give the reduced...

Human blockage and its dynamics are potential challenges for millimeter-wave (mm-wave) mobile communication. This article presents the results of wideband measurements at 27 GHz with one human blocker close by a dynamic terminal (MT) as well or multiple blockers further away from an MT. The measured loss is largest when direct path (DP) in line-of-sight (LOS) blocked, but this limited other mul...