This paper derives the extended ambiguity function for a bistatic multiple-input multiple-output (MIMO) radar system, which includes the whole radar system parameters: geometric sensor configuration, waveforms, range, range rate, target scattering and noise characteristics. Recent research indicates the potential parameter estimate performance of bistatic MIMO radars. And this ambiguity functio...

The fractional Fourier transform (FRFT) is a useful tool for signal processing. It is the generalization of the Fourier transform. Many fractional operations, such as fractional convolution, fractional correlation, and the fractional Hilbert transform, are defined from it. In fact, the FRFT can be further generalized into the linear canonical transform (LCT), and we can also use the LCT to defi...

results the mean age of patients was 60 ± 9.9 years. statistically significant relationship between the occurrence of af with mitral valve annulus, la volume index (lavi) , right ventricle function, and type of surgery (off pump or on pump) were detected in our study (p < 0.05) . there was no statistically significant relationship between the occurrence of af and time interval of p wave to a wa...

BACKGROUND Genome-wide association studies have shown that the common single nucleotide polymorphism rs6800541 located in SCN10A, encoding the voltage-gated Nav1.8 sodium channel, is associated with PR-interval prolongation and atrial fibrillation (AF). Single nucleotide polymorphism rs6800541 is in high linkage disequilibrium with the nonsynonymous variant in SCN10A, rs6795970 (V1073A, r(2)=0....

Today’s imaging systems today frequently have digital components, and some image processing is done in the camera. The potential for dramatically increased perfor­ mance is not realized, however, until the complete imaging system, including the optics and signal processing, is designed as a coherent whole. In such a system, the optics produces an intermediate image, and the final image is produ...

We consider the problem of estimating the Doppler shift and rate of a linearly modulated digital signal subject to time-selective Rician fading. We derive the Cram er-Rao bounds for the parameters; we propose an estimator, based on the Higher-order Ambiguity Function (HAF), and show that it is consistent. We also establish some interesting results in the context of estimating the parameters of ...

BACKGROUND Increased concentrations of circulating fibroblast growth factor 23 (FGF-23) have been associated with higher risk of cardiovascular disease. The association between FGF-23 and the risk of atrial fibrillation (AF), a common arrhythmia, is less defined. Thus, we explored whether FGF-23 concentration was associated with AF incidence in a large community-based cohort. METHODS AND RESU...

This article presents the results of an experiment designed to test theoretical predictions about the impact of public compensation schemes and ambiguity on insurance and self-insurance decisions. Consistent with theory, we find that government assistance significantly reduces willingness to pay (WTP) for insurance and self-insurance (compared with a free insurance market). As expected, we also...

Certain changes in pulse shape do not affect the resolution capability of a sonar system. These changes can be expressed as mathematical transformations that leave invariant important properties of the wide-band ambiguity function. Such transformations provide a large number of signal and filter functions, all of which satisfy a given range-Doppler resolution requirement. The sonar designer can...

This paper analysis the characteristics and ambiguity function of the single-channel and multichannel DVB-T signals, and choose the multi-channel DVB-T signal as opportunity illuminators to do the research of ISAR imaging. Firstly, the target’s echo using single-in-multi-out mode for passive ISAR image is derived, together with the analysis of the composition of the echo’s spatial spectrum. Con...