A Wideband Satellite Maritime Channel Model Simulator

Abstract

In this article, we present implementation details of a generative satellite maritime propagation channel model at L-band. In an earlier paper, we presented the parameterization of the channel model for the narrowband case based on recordings of GPS L1 C/N 0 time-series in different sea state conditions. Additionally, we performed wider band measurements using GPS E5a (≈ 10 Mcps-chips per second-> 20 MHz bandwidth) and obtained estimations of power delay profiles. Due to lack of dynamic range and delay resolution, in these measurements, no conclusive information was gathered on the time spreading caused by the channel. What was clear is that the time spreading was not significant outside the first signal chip, i.e., ≈ 0.1 µs. Still wideband modeling is required within this spreading range. Now, we want to extend the model to the wideband case. To achieve this goal, we have used a rough surface scattering model applicable to sea surfaces and employed it to characterize the time dispersion to be expected. Additionally, we also used this scattering model to help verify the validity of the existing Doppler spread model. Furthermore, ship movements in the waves play a role. We try and analyze this issue. Finally, we present a detailed discussion on various implementation issues we came across when coding the simulator.

Feasibility of Ultra-Wideband Channels at Millimeter Wavelengths Faded by Rain in GeoSurf Satellite Constellations

“…The literature on what today is defined as "wideband" communication does not refer to rain attenuation or to the ultra-wideband radio links studied here but instead refers only to radio links in clear-sky conditions (mainly multipath), both for terrestrial and satellite systems [5,[12][13][14][15][16]; therefore, we discuss these topics further, following work carried out by [4,17].…”

Maritime Intelligent Monitoring System Based on Wireless Sensor Network and Construction of Shipping Legal System

“…The Y user detects the observed value of the channel. Obviously, in the detection process t = 0, the observations obtained by the secondary user before and after the detection channel are distributed according to different distributions [25]: fY 1 , Y 2 , ⋯, Y T 0 g is an independent and identically distributed process with a probability density of f 0 ðyÞ, and fY 1 , Y 2 , ⋯, Y T 0 g is a process with a probability density of f 0 ðyÞ fY 1 , Y 2 , ⋯, Y T 0 g is an independent identically distributed process with a probability density of f 0 ðyÞ. The time unit in Figure 4 is the detection time interval.…”

Transfer Functions and Linear Distortions in Ultra-Wideband Channels Faded by Rain in GeoSurf Satellite Constellations

“…The vast literature on what today is termed "wideband" communication systems never refers to rain attenuation, or to the ultra-wideband radio links here supposed, but only to radio links in clear-sky conditions (e.g., faded by multipath, obstructions, etc. ), both for terrestrial and satellite systems [4,[11][12][13][14][15]; therefore, we are discussing these topics here for the first time, as our previous study involving rain attenuation and phase delay referred to narrow-band satellite systems and deep-space communications [16].…”