Wideband model of man-made HF noise and interference

Terrestrial Natural and Man-made Electromagnetic Noise

The terrestrial environment is continuously exposed to electromagnetic radiations which set up a “background” electromagnetic noise. For what concerns electromagnetic waves in the Non Ionizing Radiation band (NIR), i.e. for frequencies lower than 300 GHz, the background can have a natural or an artificial origin. In the first case electromagnetic radiations have generally an atmospheric or a co...

Performance of Microcellular Mobile Radio in a Cochannel Interference, Natural, and Man-Made Noise Environment

A model is developed for performance analysis of a microcellular digital mobile radio system with Rayleigh-faded cochannel interference, Gaussian noise, and narrow-band impulsive noise (Middleton’s Class A noise) using the differential phase shift keying modulation (DPSK) technique. The desired signal has been assumed to be Rician faded. The effects of selection diversity on the performance hav...

Hf Xl: Adaptive Wideband Hf Transmissions

This paper presents a solution to increase the throughput of an HF (High Frequency) physical (PHY) layer in particular to allow for services such as IP over HF. Additionally, this new PHY layer can improve the adaptability of the waveform to the channel variations, in particular to limit the retransmissions due to errors. Taking into consideration the existing HF spectrum occupancy and its high...

Wideband HF Modeling and Simulation

Natural and man-made terrestrial electromagnetic noise: an outlook

Natural electromagnetic noise sources existing since the origin of the Earth may be influencing the evolution of living systems. Understanding how this background noise is generated and distributed and how it interacts with living systems, can contribute to the general knowledge of life on Earth. In this review we consider the different frequency ranges, starting from the lowest frequencies gen...