Satellite Communications Systems Engineering

Ippolito, Louis J.

doi:10.1002/9781119259411

Cited by 93 publications

(42 citation statements)

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“…The proliferation of communication traffic driven by Internet access, broadband multimedia services demand, and more generally, the globalization has led to the allocation of higher frequency bands for communications satellite systems . The higher frequency Ka‐band not only provides additional bandwidth leading to higher capacity but also the shorter wavelength has made possible the high directional antennas and thus satellite spot beams with diameters of typically a few hundred kilometers .…”

Section: Introductionmentioning

confidence: 99%

“…By reusing frequency and polarivzation (color reuse) among the spot beams, high throughput satellite (HTS) systems are created, which have reached capacity to 100 s of gigabytes . However, crossing the 10 GHz frequency limit into Ka‐band gives rise to significant signal fading induced by the tropospheric precipitation in the slant paths , and color reuse produces co‐color interference (CCI) to the desired signal . Both impairments vary randomly, degrade channel performances, and erode ideally achievable capacity.…”

Section: Introductionmentioning

confidence: 99%

“…Communications channel signal‐to‐noise‐plus‐interference ratio (SNIR) is a fundamental channel quality of service measure . A channel capacity or link throughput by bit rate is achievable for a given channel SNIR and the available system resources .…”

Section: Introductionmentioning

confidence: 99%

“…Currently, the advancement of digital technologies has enabled the increasing use of the regenerative operation with satellite on‐board processing capability . The on‐board processing opens up the needs of single hop channel SNIR distribution measurements.…”

Section: Introductionmentioning

confidence: 99%

“…The rising rain attenuation in Ka‐band was first studied by NASA ACTS project . A large number of studies on Ka‐band rain models for the various parts of the world exist , of which the ITU recommended model is used for the development of the uplink SNIR model in this article.…”

Section: Introductionmentioning

confidence: 99%

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Ka‐band HTS channel uplink SNIR probability model

2017

Satell Commun Network

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SUMMARYI present a novel analytical study of the signal-to-noise-plus-interference ratio (SNIR) for Ka-band high throughput satellite uplink channels. The Ka-band high throughput satellite systems employ frequency and polarization (color) reuse among the spot beams to achieve throughput increase many times the throughput of the system without reuse. However, color reuse also produces substantial co-color interference and adding to it, tropospheric precipitation attenuation rises sharply in Ka-band. The co-color interference and precipitation induced fading vary randomly; they degrade the system performances. To assess the impact, I develop the uplink channel SNIR probability model in this study. Compared with the known studies of the same topic, this study takes the theoretic approach and is applicable to the urban users in particular. The model is feasible to implement and can provide accurate assessment of the channel SNIR performances statistically in theory for a wide array of system operational scenarios. The SNIR probability model is applied to a model spot beam system of 101 user beams to obtain and compare sample channel performances, which can be used for making system design choices at the early stage of a satellite project.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ka‐band HTS channel uplink SNIR probability model

2017

Satell Commun Network

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Frequency scaling of slant‐path atmospheric attenuation in the absence of rain for millimeter‐wave links

Lucas-Vegas

Riera

2016

Radio Science

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Broadband satellite communications systems, either used for broadcast or fixed satellite services, have grown continuously in recent years. This has led to the use of higher frequency bands, from the Ku (14/11 GHz) to the Ka band (30/20 GHz) in the last decade, and with the expectation of using the Q/V band (50/40 GHz) and even the W band (75–110 GHz) in the future. As frequency increases, radio wave propagation effects in the slant‐path within the troposphere are becoming more and more relevant. The objective of this research is the proposal of frequency scaling approximations for the total attenuation in the absence of rain, a condition that occurs during the highest percentages of time, usually more than 95% in temperate climates. There is a strong relationship between total attenuation at different frequencies, as it arises from the same physical phenomena, namely, the presence of oxygen, water vapor, and clouds in the slant path. This strong relationship allows frequency scaling estimations to be proposed. In particular, polynomials for instantaneous frequency scaling of total attenuation under these conditions have been calculated for a set of frequencies in the range 10–100 GHz, based on atmospheric profiles of 60 sites from all over the world and physical models of attenuation. Global polynomials are provided for the 72 combinations of nine significant frequencies, which can be used to estimate attenuation at a frequency band from its known value at a different one. Refined expressions have also been calculated for different climatic zones, providing more precise estimations.

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Communications Link

2021

Satellite Communications Payload and System

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Satellite Communications Systems Engineering

Cited by 93 publications

References 0 publications

Ka‐band HTS channel uplink SNIR probability model

Ka‐band HTS channel uplink SNIR probability model

Frequency scaling of slant‐path atmospheric attenuation in the absence of rain for millimeter‐wave links

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