A geometry-based three-dimensional (3D) novel stochastic channel model for air-to-ground (A2G) and ground-to-air (G2A) radio propagation environments is proposed. The vicinity of a ground station (GS) is modelled as surrounded by effective scattering points; whereas the elevated air station’s (AS) vicinity is modelled as a scattering-free region. Characterization of the Doppler spectrum, disper...

Radio wave propagation models are extremely important in radio network planning, design as well as in interference planning.All the models predict mean path loss as a function of different variables such as frequency, distance between transmitting and receiving antenna, antenna heights, etc. Radio propagation is essential for emerging technologies with appropriate design, deployment and managem...

Advanced users of high frequency (HF) radio communications have long used systems known as chirpsounders 1 to obtain real-time information about the ionospheric propagation conditions of different communication channels between a transmitter and a receiver. Traditional chirpsounders are expensive to realize and lack the flexibility of state-of-the art digital radio platforms. However, the adven...

Develop an advanced unified hybrid radio propagation model based on parabolic equation and rayoptics methods for both surface-based and airborne applications. This model is named the Advanced Propagation Model (APM) and is the model used in the Advanced Refractive Effects Prediction System (AREPS). Complete analysis of radio signal strength measurements from NOAA radio transmitters and compare ...

The concept of wave propagation and the interaction of waves with matter is pivotal in many fields of physics and engineering (e. g. radio transmission, optics, sound propagation, transmission of information in waveguides...). Therefore wave propagation plays a central role in teaching physics, electrical engineering, information technology etc. from the undergraduate level (undergratuate engin...

This paper presents a comparative study between results of a single channel multihop wireless network testbed and the network simulators ns-2 and ns-3. We explore how well these simulators reflect reality with their standard empirical radio modeling capabilities. The environment studied is a corridor causing wave-guiding propagation phenomena of radio waves, which challenges the radio models us...

We discuss optimal detection of fast radio transients from astrophysical objects while taking into account the effects of propagation through intervening ionized media, including dispersion, scattering and scintillation. Our analysis applies to the giant-pulse phenomenon exhibited by some pulsars, for which we show examples, and to radio pulses from other astrophysical sources, such as prompt r...

This paper describes the results of an ultrawideband (UWB) propagation study in which arrays of propagation measurements were made. After a description of the propagation measurement technique, an approach to the spatial and temporal decomposition of an array of measurements into wavefronts impinging on the receiving array is presented. Based on a modification of the CLEAN algorithm, this appro...

Diversity reception is a widely used technique in radio communications to reduce signal fading due to complex propagation environments. Fading is caused by multipath propagation of the radio signal in complex environments, which in practice are either downtown areas in large cities or indoor environments. This presentation is focused on the design problem of an antenna array, which could be use...

In reality, radio range of any wireless communication device does not emulate an isotropic behavior or as modeled by theory. An isotropic antenna is a hypothetical lossless antenna having equal energy being radiated or transmitted in all directions. Along with wireless sensor networks, any wireless network suffered propagation complications including multipath propagation, shadowing and path lo...