The problem of signal direction-of-arrival (DOA) estimation in partly calibrated arrays composed of multiple subarrays with unknown intersubarray parameters and imperfectly known subarray orientations is studied. The recently developed spectral and root versions of the rank reduction estimator (RARE) are applicable to scenarios where no intersubarray calibration is available, but unfortunately,...

This paper revisits a model for elliptic curves over Q introduced by Huff in 1948 to study a diophantine problem. Huff’s model readily extends over fields of odd characteristic. Every elliptic curve over such a field and containing a copy of Z/4Z× Z/2Z is birationally equivalent to a Huff curve over the original field. This paper extends and generalizes Huff’s model. It presents fast explicit f...

Article history: Available online 31 March 2010

The paper deals with the problem of mobile location in the presence of angular scattering. The proposed approach consists in using the knowledge of the Power Angle Density (PAD) to estimate the azimuth, the sight of the mobile and their respective angular spread.

We are living in a world where there is an increasing need for evidence in organizations. Good digital evidence is becoming a business enabler. Very few organizations have the structures (management and infrastructure) in place to enable them to conduct cost effective, low-impact and efficient digital investigations (Sommer, 2005). Digital Forensics (DF) is a vehicle that organizations use to p...

To improve the quality of the mobile reception of DVB-T (Digital Video Broadcasting on Terrestrial networks) signal, the knowledge of the propagation channel characteristics is necessary. In this aim, this paper presents sounding methods and results for the estimation of Direction of Arrival (DoA) of DVB-T signals in mobile receiving configuration. The mobile passive sounder is presented, inclu...

This paper deals with the problem of the Direction Of Arrival (DOA) estimation with nonuniform linear arrays. The proposed method is a combination of the Expectation Maximization (EM) and the ESPRIT methods. The EM algorithm interpolates the nonuniform array to an equivalent uniform array, and then, the application of ESPRIT is possible, in order to estimate the DOA. One of this method noveltie...

A new ESPRIT-based algorithm is proposed to estimate the direction-of-arrival of an arbitrary degree polynomialphase signal with a single acoustic vector sensor. The proposed approach requires neither a priori knowledge of the polynomial-phase signal’s coefficients nor a priori knowledge of the polynomial-phase signal’s frequency-spectrum. A preprocessing technique is also proposed to incorpora...