Satellite Communication Systems

Richharia, M.

doi:10.1007/978-1-349-14964-3

Cited by 58 publications

(17 citation statements)

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“…For downlink budget calculations, of the greatest interest is the receiving system signal to noise ratio [(S/N) or (S/N0)] expressed by range equation [13][14][15], as:…”

Section: Downlink Budgetmentioning

confidence: 99%

“…where G is receiving antenna gain, S T is receiving system noise temperature, A T is antenna noise temperature and comp T is composite noise temperature of the receiving system, including lines and equipment [10,14].…”

Section: Downlink Budgetmentioning

confidence: 99%

“…Free space loss (LS) is the greatest loss in transmitted power due to the long distance between the satellite and a ground station. This loss is displayed as [14]:…”

Section: The Figure Of Meritmentioning

confidence: 99%

“…TS) it is not indexed by elevation, since the environmental factors and technical equipment parameters do not depend on elevation (See Eqn (14)…”

mentioning

confidence: 99%

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Savings on Transmit Power through Designed Horizon Plane for LEO Satellite Ground Stations

Cakaj

Kamo

2018

JCOMSS

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Low Earth Orbit (LEO) satellites are used for public networking and for scientific purposes. Established satellite ground stations can communicate with LEO satellites only when the satellite is in their visibility region. Each ground station is characterized by its own ideal horizon plane. Because of natural barriers that plane is modified to the designed one, defined by minimal elevation, in order to avoid natural obstacles. Designed horizon plane implementation implies also the power saving from the satellite to be transmitted. The major loss in communication between the LEO satellite and the ground station is the free space loss. Free space loss varies since the distance from the ground station to the satellite varies over time, usually compensated through variable satellite transmit power toward the downlink. The main novelty of the paper is the mathematical elaboration and confirmation that through the implementation of the designed horizon plane instead of an ideal one, the transmit EIRP (Equivalent Isotropic Radiated Power) from the satellite toward the ground station, could be saved and still permanently keeping the constant receiving performance at the ground station. The novelty is proved by simulation for different altitudes associated with power savings calculation for designed horizon plane implementation compared to the ideal one.

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“…For downlink budget calculations, of the greatest interest is the receiving system signal to noise ratio [(S/N) or (S/N0)] expressed by range equation [13][14][15], as:…”

Section: Downlink Budgetmentioning

confidence: 99%

Section: Downlink Budgetmentioning

confidence: 99%

“…Free space loss (LS) is the greatest loss in transmitted power due to the long distance between the satellite and a ground station. This loss is displayed as [14]:…”

Section: The Figure Of Meritmentioning

confidence: 99%

“…TS) it is not indexed by elevation, since the environmental factors and technical equipment parameters do not depend on elevation (See Eqn (14)…”

mentioning

confidence: 99%

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Savings on Transmit Power through Designed Horizon Plane for LEO Satellite Ground Stations

Cakaj

Kamo

2018

JCOMSS

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“…The main difference among them is in the altitude above the Earth surface [1]- [3]. The satellites traversing in orbits of altitudes up to around 1400 km (limited by Van Allen belt [4]) are considered as LEO (Low Earth Orbit) satellites.…”

Section: Introductionmentioning

confidence: 99%

Elevation impact on signal to spectral noise density ratio for Low Earth Orbiting satellite ground station at S-band

Cakaj

Kamo

Lala

et al. 2014

2014 Science and Information Conference

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Ground stations are part of any satellite network, providing communication with satellites. Low Earth Orbit (LEO) satellites are used for public communication and for scientific purposes. The communication quality depends on the performance of the satellite ground station, in addition to that of the satellite. Usually, LEO satellites communicate with ground stations at S-band. Ground stations can communicate with LEO satellites only when the satellite is in their visibility region. The duration of the visibility and so the communication duration vary for each LEO satellite pass over the ground station, since LEO satellites move too fast over the Earth. The range over the same satellite path depends on the look elevation angle from the ground station. The shortest range is achieved under maximal elevation of satellite's path above the ground station. The range variation causes the free space loss changes impacting on link budget. For the downlink performance, of the greatest interest is receiving system signal to noise ratio (S/N) or (S/N 0 ). (S/N) depends on the last end receiving device bandwidth. In order to avoid the effect of the last end receiving device bandwidth, within this paper only the impact of elevation on signal to spectral noise density ratio (S/N 0 ) is considered. Keywords-LEO; satellite; signal to noise ratio; ground stationI.

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Satellites and High‐Altitude Platforms

Richharia¹,

Westbrook

2010

Satellite Systems for Personal Applications

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Satellite Communication Systems

Abstract: Any person who does any unauthorised act in relation to this publication may be liable to criminal prosecution and civil claims for damages.

Cited by 58 publications

References 0 publications

Savings on Transmit Power through Designed Horizon Plane for LEO Satellite Ground Stations

Savings on Transmit Power through Designed Horizon Plane for LEO Satellite Ground Stations

Elevation impact on signal to spectral noise density ratio for Low Earth Orbiting satellite ground station at S-band

Satellites and High‐Altitude Platforms

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