The multi-Gbps throughput potential of 60 GHz wireless interfaces make them an attractive technology for next-generation gigabit WLANs. For increased coverage, and improved resilience to human-body blockage, beamsteering with highgain directional antennas is emerging to be an integral part of 60 GHz radios. However, the real-world performance of these state-of-the-art radios in typical indoor e...

A new double-cluster statistical model for non-line-of-sight (NLOS) environment is proposed which is based on analysis of the experimental data. The model itself and the parameters estimating of the corresponding model are simplified. By defining the polarity of a particular model parameter, the model has the flexibility to deal with the “soft NLOS" and the “hard NLOS" environment. Therefore, t...

Line of Sight (LOS) rate estimation in strap down seekers using discrete-time extended state observer.

Researchers in Vehicular Ad Hoc Networks (VANETs) commonly use simulation to test new algorithms and techniques. This is the case because of the high cost and labor involved in deploying and testing vehicles in real outdoor scenarios. However, when determining the factors that should be taken into account in these simulations, some factors such as realistic road topologies and presence of obsta...

Cosmologies that match in a volume averaged sense need not generally have the same light propagation behaviors. In particular a universe with inhomogeneity may not demonstrate the Friedmann-Robertson-Walker distance-redshift relation even after volume averaging to FRW spacetime. Even the Dyer-Roeder prescription for incorporating inhomogeneity within a universe equivalent to FRW in an angle ave...

Fading is a term used to describe the rapid fluctuations of the amplitudes, phases, or multipath delays of a radio signal over a short interval of time or travel distance, so that large-scale path loss effects may be completely ignored. When there is a dominant stationary signal component present, such as a line-of-sight propagation path, the small-scale fading envelope distribution is Ricean. ...

A simple analytical model of the wireless infrared communication channel in indoor environments is presented. The infrared signal is modeled as the combination of a diffuse component and a line-of-sight (LOS) or direct component. For the diffuse component alone, the properties of the channel are found using Ulbricht’s integrating sphere. When a LOS component is also present, the transfer functi...