This paper discusses the analysis of multistatic micro-Doppler signatures and related features to distinguish and classify unarmed and potentially armed personnel. The application of radar systems to distinguish different motion types has been previously proposed and this work aims to further investigate the applicability of this in more scenarios. Real data have been collected using a multista...

We suggest that the deceleration of the relativistic shock by a denser part of the interstellar medium off line-of-sight produced the observed radio “flare” in the early afterglow of GRB990123. We find that this scenario is consistent with observations if the particle number density of this denser part of the medium is between ∼ 200 and ∼ 2 × 10 cm. Because of the premature deceleration of part...

We report on mid-infrared imaging of hot cores performed with SpectroCam– 10 and TIMMI2. The observations aimed at the detection of thermal emission presumably associated with the hot cores. Mid-infrared flux measurements are required to improve the luminosity and optical depth estimates for these sources. Results are presented for W3(H2O), G9.62+0.19, G10.47+0.03, and the possible hot core can...

We here introduce an extension and natural generalization of both the κ-μ shadowed and the classical Beckmann fading models: the Fluctuating Beckmann (FB) fading model. This new model considers the clustering of multipath waves on which the line-of-sight (LoS) components randomly fluctuate, together with the effect of in-phase/quadrature power imbalance in the LoS and non-LoS components. Thus, ...

We characterize the rate coverage distribution for a spectrum-shared millimeter wave downlink cellular network. Each of multiple cellular operators owns separate mmWave bandwidth, but shares the spectrum amongst each other while using dynamic inter-operator base station (BS) coordination to suppress the resulting cross-operator interference. We model the BS locations of each operator as mutuall...

The millimetre-wave frequency range 57-64 GHz has been already standardised by the IEEE 802.15.3c for Wireless Personal Area Network (WPAN). The specified PHY targets multi-Giga bit per second data rate with two modes, Single-Carrier Frequency Domain Equalization (SC-FDE) and Orthogonal Frequency Division Multiplexing (OFDM), both modulation schemes are based on framed data transmission, hence,...

In this paper we will present measurement results that demonstrate the different propagation characteristics of the vertical and horizontal polarizations and their crosscorrelation coupling under line-of-sight and non-line-ofsight conditions. We will also present a simplified model for the propagation environment that uses an approach similar to the method of images, and achieves results that m...

Millimeter-wave (mmWave) communication opens up tens of giga-hertz (GHz) spectrum in the mmWave band for use by next-generation wireless systems, thereby solving the problem of spectrum scarcity. Maintaining connectivity stands out to be a key design challenge for mmWave networks deployed in urban regions due to the blockage effect characterising mmWave propagation. Specifically, mmWave signals...