We consider the joint estimation of the direction-of-arrival (DOA) and parameters of wideband polynomial-phase signals (PPSs) in sensor array. Unlike concurrent methods that require multidimensional searches, the proposed method requires 1D searches for all the parameters of interest. In this way, we can efficiently estimate the considered parameters in applications where large antenna arrays, ...

The high-order ambiguity function (HAF) was introduced for the estimation of polynomial-phase signals (PPS) embedded in noise. Since the HAF is a nonlinear operator, it suffers from noise-masking effects and from the appearance of undesired cross terms and, possibly, spurious harmonics in the presence of multicomponent (mc) signals. The product HAF (PHAF) was then proposed as a way to improve t...

organizational culture of an organization is one of the fundamental staffs' job satisfaction factors. this study aimed to determine the effects of organizational culture on faculty members' job satisfaction using hofstede's model. in a descriptive applied study 61 faculty members of shahid beheshti university of medical sciences were randomly selected and studies in 2015. hofstede's model were ...