Noise Temperature Increase Effect on Total Outage Analysis of an Interfered Satellite Link

Sakarellos, Vasileios K.; Panagopoulos, Athanasios D.; Kanellopoulos, J.D.

doi:10.1007/s10762-007-9308-7

Cited by 2 publications

(4 citation statements)

References 12 publications

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“…The system temperature, T sys , consists of three components T sky , T rcv and T other [21]. Depending on either fair or rainy weather, T sky is then expressed as either T clear or T rain using Eq.…”

Section: Determination Of Noise Temperaturementioning

confidence: 99%

A Study on the Effects of Rain Attenuation for an X-Band Satellite System Over Malaysia

Priya¹,

Nizanthi²

2012

PIER B

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In this paper, the effect of rain attenuation on the FSS allocation in the 7250-7750 MHz in the Space-to-Earth direction is studied for a satellite at 78.5 • E longitude. A simulation model based on the ITU-R P618-10 rain model is used to predict the rain attenuation in the C-, Ku-and X-bands in 15 different locations with varying rainfall intensities of between 145-300 mm/hr in East and West Malaysia. The simulations assume a 1.8 m receive antenna with 65% aperture efficiency, QPSK modulation and use of either vertical or horizontal polarization. The downlink centre frequencies used in this study are 4200 MHz, 7750 MHz and 11200 MHz for C-, X-and Ku-bands respectively. The average free-space path loss calculated for each band is used to estimate the signal attenuation due to rain and the corresponding E b /N o (dB) is computed at varying rain intensities. The results show that when using vertical receive polarization, all 15 locations of study with a rainfall intensity of up to 200 mm/hr could receive the X-band signal. At 200 mm/hr rain intensity in the horizontal receive, most of the X-band links could achieve the threshold E b /N o of 7.68 dB with a ULPC adjustment of approximately 1.5 dB where required. At 300 mm/hr rain intensity, video signals in the X-band were no longer receivable in both polarizations. At 145 mm/hr rain intensity, only one location with high satellite elevation and greater height above mean sea level maintained the Ku-band link in the horizontal receive. In the vertical receive, the Ku-band link was receivable at all locations at 145 mm/hr but were no longer receivable at 200 mm/hr. The study concluded that the elevation angle towards the satellite is a major factor in determining the quality of the signal in the X-band. The other factors that affected the receive E b /N o was the polarization, depth of rain and height of the earth station above

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Section: Determination Of Noise Temperaturementioning

confidence: 99%

A Study on the Effects of Rain Attenuation for an X-Band Satellite System Over Malaysia

Priya¹,

Nizanthi²

2012

PIER B

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“…This section will present numerical evaluations of the final analytical expressions (9) and (12). Table I summarizes the parameters used for various locations in the world.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The normal probability density function is denoted as ( ) 2 2 U f u [10] and ρ is the correlation coefficient between the normal random variables , 1,2 j u j = , that has been calculated for a similar problem of interference in [12], taking into account the spatial inhomogeneity of the rainfall medium.…”

Section: B Correlated Log-normal Channelsmentioning

confidence: 99%

See 1 more Smart Citation

Performance of MRC satellite diversity receivers over correlated lognormal and gamma fading channels

Sakarellos

Skraparlis

Panagopoulos

et al. 2008

2008 10th International Workshop on Signal Processing for Space Communications

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Multi-satellite or orbital diversity is an effective technique to reduce the large fading margins in satellite communications under fading conditions. Transmitted signals from multiple angularly-spaced satellites are combined at the terminal station which is equipped with multiple antennas or a single multiple-input (multiple satellite feed -MSF) antenna. Typical signal processing techniques used for diversity combining of the multiple satellite signals are Selection Combining (SC) and Maximal Ratio Combining (MRC). The subject of this paper is to present physical statistical models for the signal-to-noise ratio distribution as well as a closed-form mathematical expression for the outage probability of dual-satellite orbital diversity with MRC operating under correlated log-normal or gamma fading conditions.

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Noise Temperature Increase Effect on Total Outage Analysis of an Interfered Satellite Link

Cited by 2 publications

References 12 publications

A Study on the Effects of Rain Attenuation for an X-Band Satellite System Over Malaysia

A Study on the Effects of Rain Attenuation for an X-Band Satellite System Over Malaysia

Performance of MRC satellite diversity receivers over correlated lognormal and gamma fading channels

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