An empirical relationship for path diversity gain

Hodge, D. B.

doi:10.1109/tap.1976.1141304

Cited by 32 publications

(20 citation statements)

References 1 publication

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“…Many factors in#uence diversity improvement [20,21]. The work of Hodge [22], who proposed the "rst diversity gain model, showed that the primary parameter that determined diversity performance was the terminal separation, provided the elevation angle was above some minimum value (around 153). The point at which convective rain events take over from stratiform rain events is where the Hodge model (now incorporated in Recommendation 618 of the ITU-R) moves into its characteristic &straight line' portion of the model.…”

Section: Diwerences In Rain Characteristics Of the Diversity Sitesmentioning

confidence: 99%

High elevation angle satellite‐to‐earth 12 GHz propagation measurements in the tropics

Pan

Bryant

McMahon

et al. 2001

Int. J. Satell. Commun.

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SUMMARYA simple, low-cost propagation terminal for measuring path attenuation and site diversity, using satellite transmissions at 12 GHz, is described. The novelty of this system is the use of a standard domestic satellite low-noise block (LNB) front-end connected directly to a spectrum analyser in place of an expensive beacon receiver. A description of the equipment, an analysis of relevant system parameters, and a discussion of the environmental conditions are presented. The method used to obtain a clear-sky baseline reference and a description of the channel signal processing are given. Analysis of the rainfall rate and attenuation exceedances statistics has led to the proposal of a new model to derive the e!ective rain-cell diameters and e!ective rain-column heights in tropical areas for attenuation predictions in satellite communication link budget calculations. Site-diversity statistics are also examined. Though the main site is only 6.5 km inland from the second coastal site, there are marked di!erences in their rain-cell characteristics. The signi"cance of volume saturation of rain cells on modelling, the operating margins of the measuring system, and the relevance of the site-diversity data to enhancing the understanding of the proposed volume saturation model are discussed.

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Section: Diwerences In Rain Characteristics Of the Diversity Sitesmentioning

confidence: 99%

High elevation angle satellite‐to‐earth 12 GHz propagation measurements in the tropics

Pan

Bryant

McMahon

et al. 2001

Int. J. Satell. Commun.

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“…In our report and 5 in much of the diversity work of others the functional interest is in the diversity advantage (I) versus S, for fixed P Such a family of curves would be the analogue of the diversity gain curves originally formulated by Hodge (1976) and would be useful in rain regimes and frequency ranges where diversity gain should not be utilized.…”

Section: ~11smentioning

confidence: 87%

COMSTAR Satellite 19/29 GHz Propagation Experiment.

Bloch¹,

Davidson²,

Tang³

1981

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“…Hodge [30,31] has shown that the diversity gain can be computed from a given attenuation, A and the separation distance, d:…”

Section: Site Diversity Planningmentioning

confidence: 99%

Rain Cell Size Mapping for Microwave Link Design Systems in South Africa

Akuon¹,

Afullo²

2011

PIER B

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Abstract-Rain cell size is an input requirement for rain-induced attenuation studies. It is useful in estimating the extent of a given radio link path that will traverse the rain medium in a given rain event. The "Synthetic Storm" approach, which requires 1-minute integration time data, is used to derive the proposed rain cell sizes for various climatic zones within South Africa. The conversion of the readily available 1-hour integration time rain rate data to the desired 1-minute rain rate is carried out first for some locations and then validated by the existing measurement data and proposed global conversion factors. By the use of rain-induced attenuation prediction equation for terrestrial links that requires rain cell size as input, contour plots of specific attenuation for two high bandwidth frequencies used in terrestrial link implementations is presented. Site diversity separation distance map is proposed as well from the link budget analysis for each location to achieve an all time link availability of 99.99% of time.

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An empirical relationship for path diversity gain

Cited by 32 publications

References 1 publication

High elevation angle satellite‐to‐earth 12 GHz propagation measurements in the tropics

High elevation angle satellite‐to‐earth 12 GHz propagation measurements in the tropics

COMSTAR Satellite 19/29 GHz Propagation Experiment.

Rain Cell Size Mapping for Microwave Link Design Systems in South Africa

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